CN119010205B - Online capacity checking method and system for storage battery of transformer substation and electronic equipment - Google Patents
Online capacity checking method and system for storage battery of transformer substation and electronic equipment Download PDFInfo
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- CN119010205B CN119010205B CN202410912462.4A CN202410912462A CN119010205B CN 119010205 B CN119010205 B CN 119010205B CN 202410912462 A CN202410912462 A CN 202410912462A CN 119010205 B CN119010205 B CN 119010205B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an online capacity checking method and system for a substation storage battery and electronic equipment, and relates to the technical field of storage battery maintenance. After a nuclear capacity discharge instruction is acquired, the direct current output by the storage battery is inverted into target alternating current with the voltage equal to the required voltage of a target load, the target load is one or more loads preselected in a transformer substation, the required current is target discharge current when the nuclear capacity of the storage battery is discharged, and then the target load is powered on based on the target alternating current, so that the nuclear capacity discharge of the storage battery is realized. Therefore, the problem that in the prior art, the storage battery needs to be separated from the direct-current bus, the storage battery is subjected to capacity checking manually, and manpower and material resources are consumed is solved, the direct current output by the storage battery is inverted into alternating current and is used for supplying power to a target load in a transformer substation, and the online capacity checking of the storage battery is realized on the basis of separating from the bus, so that the investment of manpower and material resources is greatly reduced.
Description
Technical Field
The invention relates to the technical field of storage battery maintenance, in particular to an online capacity checking method and system for a storage battery of a transformer substation and electronic equipment.
Background
The storage battery pack of the transformer substation is a core component part of the direct current system for the station, and is also a basis for guaranteeing the reliable operation of the direct current system, and the quality of the storage battery is directly related to the quality of the direct current system for the station. Therefore, it is important for maintenance of the battery pack.
In many battery maintenance works, only the battery core can be accommodated to determine whether the battery capacity meets the operation requirement, while other maintenance works can only find some obvious faults in the battery operation process or improve the safety coefficient of the battery operation. The nuclear capacity discharge of the storage battery pack is to carry out check discharge on the capacity of the storage battery pack by using 0.1C current, the discharge duration is less than or equal to 10 hours, and then the storage battery pack is charged after the discharge is finished.
With the rapid development of the current regional power grid, teams face the difficulty that the workload of people with few stations and more work is continuously increased, and the problems of long time consumption of manpower, inconvenient carrying of detection instruments, delayed problem finding and the like exist in the storage battery core capacity. And the traditional on-site capacity checking operation is complicated, a large amount of manpower and material resources are consumed, and the situation that the fault of the storage battery cannot be found in time still occurs. Therefore, the safe and reliable remote control method for the battery nuclear capacity charge and discharge is developed, and the method has high application value.
Disclosure of Invention
The invention aims to provide an online capacity checking method, system and electronic equipment for a storage battery of a transformer substation, which are used for solving the problem that in the prior art, the storage battery needs to be separated from a direct current bus, and then the storage battery is manually checked, so that manpower and material resources are consumed.
In a first aspect, the present invention provides an online capacity checking method for a substation storage battery, including:
Acquiring a nuclear capacity discharge instruction;
in response to the nuclear capacity discharging instruction, inverting the direct current output by the storage battery into target alternating current with the voltage equal to the required voltage of a target load, wherein the target load is one or more loads preselected in a transformer substation;
based on the target alternating current, supplying power to a target load in a transformer substation, and realizing nuclear capacity discharge of the storage battery;
the required current of the target load is the target discharge current when the storage battery nuclear capacity is discharged.
In a preferred aspect, the supplying power to the target load based on the target ac power includes:
regulating the target alternating current based on the required current of the target load;
And supplying power to the target load based on the regulated target alternating current.
In a preferred embodiment, the method for determining the target load includes:
responding to the nuclear capacity discharging instruction, and acquiring the required current of each load in the transformer substation, which has a connection relation with the storage battery, according to a preset period;
And determining the target load in the current preset period based on the required current of each load and the target discharge current.
In a preferred embodiment, the method for determining the target load includes:
Acquiring the required current of each load in the transformer substation, which has a connection relation with the storage battery, according to a preset frequency within a preset time period;
Determining a preselected load based on the required current of each load, wherein the preselected load is a load with the constant current requirement in the nuclear capacity discharging time of the storage battery;
And determining the target load in the preselected loads based on the target discharge current and the time period for which the current demand of each preselected load is kept unchanged.
In a preferred embodiment, the nuclear capacity discharge instruction is generated at a target time, and the duration from the target time to the end time of the period when the current demand of the target load is constant is greater than or equal to the nuclear capacity discharge duration of the storage battery.
In a preferred scheme, the online capacity checking method for the substation storage battery further comprises the following steps:
Monitoring whether the discharge state of the storage battery is normal or not in real time;
And stopping nuclear capacity discharge of the storage battery when the abnormal discharge state of the storage battery is determined.
In a preferred scheme, the online capacity checking method for the substation storage battery further comprises the following steps:
And after the nuclear capacity discharge of the storage battery is finished, charging the storage battery.
In a second aspect, the present invention provides an online capacity checking system for a substation storage battery, including:
the acquisition unit is used for acquiring a nuclear capacity discharge instruction;
The inversion unit is used for responding to the nuclear capacity discharge instruction, and inverting the direct current output by the storage battery into target alternating current with the voltage equal to the required voltage of a target load, wherein the target load is one or more loads preselected in a transformer substation;
the execution unit is used for supplying power to the target load based on the target alternating current so as to realize the nuclear capacity discharge of the storage battery;
the required current of the target load is the target discharge current when the storage battery nuclear capacity is discharged.
In a third aspect, the present invention provides a substation comprising a substation body and a substation storage battery online capacity checking system as provided in the second aspect.
In a fourth aspect, the present invention provides an electronic device, including:
A processor;
a memory for storing the processor-executable instructions;
the processor is used for executing the online capacity checking method of the substation storage battery provided by the first aspect of the invention.
In order to achieve the above object, according to the method, the system and the electronic device for online capacity checking of the substation storage battery provided by the invention, after a capacity checking and discharging instruction is acquired, the direct current output by the storage battery is inverted into the target alternating current with the voltage equal to the required voltage of the target load preselected in the substation in response to the capacity checking and discharging instruction, so that the power can be supplied to the target load based on the target alternating current, and the required current of the target load is the target discharging current when the storage battery is subjected to capacity checking and discharging. Therefore, on one hand, the on-line nuclear capacity discharging of the storage battery is realized under the condition that the storage battery is not separated from the direct current bus, on the other hand, the electric energy waste is avoided, the workload of staff is reduced, and the nuclear capacity efficiency and safety are improved.
Drawings
Fig. 1 is a flowchart of a method for online capacity checking of a substation storage battery according to an embodiment of the present invention.
Fig. 2 is a system architecture diagram of an online capacity checking method for a substation storage battery provided by an embodiment of the invention.
Fig. 3 is an operation flow chart of an online capacity checking method for a substation storage battery provided by an embodiment of the invention.
Fig. 4 is a block diagram of an online capacity checking system for a substation storage battery provided by an embodiment of the invention.
Fig. 5 is a block diagram of an online capacity checking system of a substation storage battery according to an embodiment of the present invention.
Fig. 6 is a block diagram of another online capacity checking system for a substation storage battery according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
It can be understood that the conventional battery capacity operation needs to disconnect the battery from the dc bus and then connect a dedicated battery discharging instrument to discharge as a load. The mode is time-consuming and labor-consuming, and has certain operation risks, particularly, in recent years, the power construction speed is increased, the number of substations is increased, and the operation and maintenance pressure of team personnel is increased continuously.
Currently, the main technologies of remote nuclear capacity of a series storage battery comprise high-power discharge with a dummy load, direct-current nuclear capacity with a load, DC/AC inversion type discharge and DC/DC boost type discharge. However, the high-power discharge technology with the dummy load has obvious defects of heating, energy waste and the like, the DC load nuclear capacity does not meet the I 10 discharge current requirement, the DC/AC inversion type discharge cost is high, the device is large in size, the popularization and application level is not met, the DC/DC boost type discharge is suitable for a communication power supply, and the DC load power supply requirement is not met when the main storage battery is increased to the discharge voltage. Therefore, the method has the characteristics of small site transformation amount, convenient installation (small volume), low cost, practical effect and the like of the transformer substation, and is a difficult problem which needs to be solved at present by completely replacing the existing manual charge and discharge test.
In order to solve the problems, the invention provides an on-line storage battery capacity checking method based on an inversion technology by combining a storage battery on-load capacity checking technology and a DC/AC inversion power grid discharging technology. The remote discharge capacity test of the storage battery can be realized, the manpower and time cost of manual capacity is effectively reduced, and the economic benefit and the safety improvement level are remarkable.
The online capacity checking method of the substation storage battery is executed in electronic equipment, wherein the electronic equipment can be a controller configured on a substation, can be a controller independent of the substation, can be intelligent terminal equipment such as a notebook computer, a personal computer and a tablet computer and the like which can be connected with the substation, and can be a server on a network side in certain cases.
As shown in fig. 1, the online capacity checking method for the substation storage battery provided by the embodiment of the invention mainly comprises the following steps:
110. and obtaining a nuclear capacity discharge instruction.
Specifically, taking an example of executing the online capacity checking method of the substation storage battery by a controller connected with a substation control management system, when the capacity checking and discharging instruction needs to be executed on the substation storage battery, the control management system of the substation or the battery management system of the storage battery and the like send the capacity checking and discharging instruction to the controller, so that the controller can execute online capacity checking on the substation storage battery after acquiring the capacity checking and discharging instruction.
120. And in response to the nuclear capacity discharge instruction, inverting the direct current output by the storage battery into target alternating current with the voltage equal to the required voltage of the target load.
Wherein the target load is one or more loads preselected within the substation.
Specifically, after the controller acquires the nuclear capacity discharge instruction, the controller responds to the instruction, namely, firstly inverts the direct current output by the storage battery into target alternating current with the voltage equal to the required voltage of the target load.
It will be appreciated that the load within the substation is typically driven by 380V ac, and thus in some alternative embodiments the dc power output by the battery may be inverted to 380V ac for powering the target load connected to the substation.
130. And supplying power to a target load based on the target alternating current, so as to realize the nuclear capacity discharge of the storage battery.
The required current of the target load is the target discharge current when the storage battery nuclear capacity is discharged.
It is understood that the battery nuclear discharge is a checkable discharge of battery capacity at 0.1C current.
Specifically, the actual capacity of the storage battery is an important index for measuring the quality of the storage battery pack, the important index represents the electric quantity which can be released by the storage battery, the backup service time is designed by the nominal capacity when the storage battery pack is actually applied, and when the storage battery is deteriorated, the service time is difficult to reach the design requirement, and the safety threat is brought to the stability of the power utilization system. The capacity of the battery is usually represented by C, and the unit ampere hour (Ah), when calculating the actual discharge capacity of the battery, the product of the discharge current and time is usually represented, and the calculation formula is shown in formula (1).
C=∫ t0i(t)dt (1)
Wherein i (t) is real-time current, the unit A, C is the capacity of the storage battery, and the unit Ah.
Based on this, when the battery that needs to be nuclear-discharged is determined, the nominal capacity of the battery is known, and thus the discharge current that discharges the nuclear capacity of the battery is also determined.
Further, after the discharge current for the nuclear capacity discharge of the storage battery is determined, a load for consuming the discharge current can be selected as a target load in the transformer substation based on the discharge current, namely, a load with a required current and a load with a discharge current being matched are selected as the target load, and further, the online nuclear capacity discharge of the storage battery in the transformer substation is realized while the power is supplied for the target load based on the target alternating current.
In this embodiment, after the nuclear capacity discharge instruction is obtained, the direct current output by the storage battery is firstly inverted into the target alternating current with the voltage equal to the required voltage of the target load in the transformer substation in response to the nuclear capacity discharge instruction, then the target load is powered based on the target alternating current, and the required current of the target load is the target discharge current when the storage battery is subjected to nuclear capacity discharge, so that the nuclear capacity discharge of the storage battery in the transformer substation is realized under the condition that the storage battery is not separated from the direct current bus.
It should be noted that, when the online capacity checking method for the substation storage battery provided by the embodiment is actually applied, only a DC/AC grid-connected inverter is required to be configured in the substation, and then connection between the inverter and the storage battery and a target load is controlled based on a controller. Therefore, by applying the online capacity checking method for the substation storage battery provided by the embodiment, the on-site transformation amount of the substation is small, the installation is convenient, the cost is low, and the practicability is strong.
Further, the controller can be arranged as a remote controller which is remotely connected with the controller in the transformer substation, so that the remote control of the nuclear capacity discharge of the storage battery is realized.
It should be noted that, as shown in the foregoing formula (1), the actual capacity of the storage battery is determined by the target discharge current and the duration of the nuclear capacity discharge, so that the potential fault battery is found in advance, and the safe and reliable operation of the transformer substation is ensured.
Based on the content of the above embodiment, based on the target alternating current, supplying power to the target load includes:
regulating the target alternating current based on the required current of the target load;
And supplying power to the target load based on the regulated target alternating current.
In this embodiment, the target ac is adjusted based on the required current of the target load, and the required current of the target load is the target discharge current when the battery is subjected to nuclear capacity discharge, so that when the adjusted target ac is used for supplying power to the target load, the battery can be subjected to constant current discharge by using the target discharge current when the nuclear capacity is discharged, thereby improving the accuracy of nuclear capacity discharge of the battery and further ensuring the accuracy of actual capacity detection of the battery.
It can be understood that the accuracy of detecting the actual capacity of the storage battery can be improved by keeping the storage battery to discharge at a constant current with a target discharge current in the nuclear capacity discharge period. However, the loads in the transformer substation are numerous, the required current of each load is not necessarily the same, and even one load, the required current of each load in different periods is not necessarily the same. In order to ensure that the battery is discharged at the target discharge current constant current, it is necessary to identify a load that can maintain constant current discharge at the target discharge current when the battery is supplied with power.
Accordingly, in an alternative embodiment, the present invention provides a method of determining a target load, comprising:
Responding to a nuclear capacity discharge instruction, and acquiring the required current of each load in the transformer substation, which has a connection relation with the storage battery, according to a preset period;
the target load in the current preset period is determined based on the required current and the target discharge current of each load.
In this embodiment, the preset period is set according to actual requirements, and specifically, the requirement change rule of each load having a connection relationship with the storage battery for current can be obtained in advance to determine, so that the preset period can be ensured to basically cover the requirement change of each load for current.
Further, after a preset period is reasonably set, the required current of each load in a connection relation with the storage battery in the transformer substation is obtained according to the preset period when the nuclear capacity discharge instruction is responded, so that the required current change of each load in the connection relation with the storage battery can be obtained in real time.
Furthermore, because the target discharge current is determined, after the required current of each load having a connection relation with the storage battery is obtained, the load which can enable the required current to be matched with the target discharge current can be determined in real time according to the relation between each required current and the target discharge current, and then when the loads are powered by the target discharge current, the online capacity of discharging the storage battery with constant current is realized.
In the embodiment, the target load is determined based on the target discharge current and the required current of each load which is acquired according to the preset period and has a connection relation with the storage battery, so that the dynamic adjustment of the target load is realized, and the storage battery is effectively ensured to perform constant current discharge with the target discharge current.
It should be noted that, because the target load determined by the method for determining a target load provided by the above embodiment is changed in real time, the power supply relationship between the storage battery and the load is also changed in real time. However, at the moment when the power supply relationship between the battery and the load is switched, there is a possibility that the power supply current changes, thereby affecting the constant current discharge of the battery.
Based on this, in some possible embodiments, the moment when the target load changes and the storage battery is switched to supply power to the new target load can be determined through experiments, then the change condition of the supply current is determined based on the change condition, for example, if the supply current is reduced at the switching moment, the load with the required current and the current reduction amount adapted to be selected as the compensation load in the transformer substation is selected, the storage battery is also used for supplying power to the compensation load at the moment of power supply switching, and then the power supply relation between the storage battery and the compensation load is cut off at the end of current fluctuation caused by switching. If the power supply current increases at the switching moment, a load with the adaptive demand current and current increase is selected from the newly determined target load as a current suppressing load, the storage battery is not powered for the current suppressing load at the moment of power supply switching, and then the power supply relation between the storage battery and the current suppressing load is established when the current fluctuation caused by switching is over.
In an alternative embodiment, the present invention further provides another method for determining a target load, including:
Acquiring the required current of each load in the transformer substation, which has a connection relation with the storage battery, according to a preset frequency within a preset time period;
determining a preselected load based on the required current of each load, wherein the load is a load with the constant current requirement in the nuclear capacity discharging time of the storage battery;
The target load is determined among the preselected loads based on the target discharge current and the period of time during which the current demand of each preselected load remains unchanged.
In this embodiment, the required current of each load having a connection relationship with the storage battery in the transformer substation is obtained according to the preset frequency in the preset time, so that the change condition of the current demand of each load having a connection relationship with the storage battery in the preset time can be fully known, and therefore, based on the required current of each load, the load with the constant current demand in the nuclear capacity discharge time of the storage battery is determined, and finally, based on the target discharge current, the load with the constant current demand in the same time period can be further determined in the determined preselected load, and the load with the sum of the required currents being matched with the target discharge current, namely, the target load is determined.
In this embodiment, by knowing in advance the demand rule of each load having a connection relationship with the storage battery for current, then finding out the load in the same period based on the demand rule, and the period satisfies the core-capacity discharge duration of the storage battery, so that the storage battery can ensure constant current discharge when the period supplies power to the selected load, thereby satisfying the requirement for core-capacity discharge of the storage battery.
Further, in an alternative embodiment, the nuclear capacity discharge instruction is generated at a target time, the target time is within a period when the demand of the target load for the current remains unchanged, and a duration from the target time to an end time of the period when the demand of the target load for the current remains unchanged is greater than or equal to a nuclear capacity discharge duration of the storage battery.
In this embodiment, after the target load is determined, since the same period of stable current demand exists between the target loads, the nuclear capacity discharge instruction is generated at the target time, and the target time is within the period of constant current demand of the target load, and the duration from the target time to the end time of the period of constant current demand of the target load is greater than or equal to the nuclear capacity discharge duration of the storage battery, so that the timing automatic generation of the nuclear capacity discharge instruction can be realized, and further, the automatic online nuclear capacity of the substation storage battery is realized, thereby further reducing the workload of staff and improving the nuclear capacity efficiency.
Further, in order to ensure the safety of the online capacity, in an optional embodiment, the method for online capacity of the substation storage battery provided by the embodiment of the invention further includes:
monitoring whether the discharge state of the storage battery is normal or not in real time;
When it is determined that the discharge state of the battery is abnormal, the nuclear capacity discharge of the battery is stopped.
In the embodiment, the discharging state of the storage battery is monitored in real time in the nuclear capacity discharging process of the storage battery, and the nuclear capacity discharging of the storage battery is stopped when the abnormal discharging state of the storage battery is determined, so that the safety in the nuclear capacity discharging process is effectively ensured.
In an optional embodiment, the method for online capacity checking of the substation storage battery provided by the embodiment of the invention further includes:
after the nuclear capacity discharge of the storage battery is finished, the storage battery is charged.
It can be understood that after the nuclear capacity discharge of the storage battery is finished, the storage battery is in a power shortage state, the electric quantity of the storage battery can be ensured by charging the storage battery, and then the transformer substation can be ensured to reliably supply power with the storage battery when needed, namely, the operation reliability of the transformer substation is improved.
In order to improve the operation safety of the transformer substation, the charging state of the storage battery may be monitored in real time during the process of charging the storage battery, and then the charging of the storage battery may be stopped when it is determined that the charging state is abnormal or the charging reaches a cut-off condition.
Fig. 2 is a system architecture diagram of an online capacity checking method for a substation storage battery provided by the embodiment of the invention, wherein a battery pack is the storage battery described in the embodiment of the invention, a monitoring device is the controller described in the embodiment of the invention, and the battery monitoring device can acquire each operation parameter of the battery pack in the process of nuclear capacity discharging, such as internal resistance, single voltage, surface temperature and the like, in real time through connecting the monitoring device, so that diagnosis of the health state of the battery pack is realized. As shown in fig. 2, after the monitoring device obtains the nuclear capacity discharge instruction, the inversion module is controlled to invert the direct current output by the battery pack into a target alternating current with the voltage equal to the required voltage of the target load, and then the target load A, B, C and N in the transformer substation are powered on based on the target alternating current, so that the nuclear capacity discharge of the battery pack is realized.
Further, when the nuclear capacity discharge is finished or the discharge state is abnormal, the monitoring device controls the discharge to be finished, then after the delay is preset, the inversion module is controlled to convert the alternating current into the direct current to charge the battery pack at constant current and voltage limiting, and the charging process is monitored in real time.
Fig. 3 is a flow chart illustrating the operation of performing the battery capacity charge and discharge by the substation battery online capacity checking method according to the embodiment of the present invention. The method comprises the steps of loading a program, initializing an interrupt program and setting default parameters, wherein equipment self-checking is to detect each module of a storage battery charging and discharging device, wherein the equipment self-checking comprises a bus switch relay state, a charging and discharging switch state, a bidirectional DC/AC module communication detection and the like, and the follow-up operation cannot be carried out through the initialization and self-checking. In the discharging process, the main program circularly detects the discharging state and the discharging stop judging condition, and when abnormality and triggering of the discharging stop condition occur, the discharging process is ended, after the delay program is ended, the storage battery is started to charge, and the main program continuously judges the charging end condition until the charging is ended.
The operation flow can adopt a mode of local control and remote control double-loop control, wherein the local control can adopt a touch pad to control the charge and discharge flow, and an upper computer software communication control program realizes the communication between a lower computer and an upper computer through functions of remote signaling, remote control, remote setting and the like, remotely monitors the charge and discharge process, alarms in real time and enables the device to complete the function of expected design under the instruction of software.
Further, the charge and discharge state detection step in fig. 3 can ensure that the charge and discharge of the core capacity of the storage battery are orderly performed, and prevent accidents caused by abnormal states.
In particular, various fault status responses may be set, such as:
(1) The communication is interrupted. When the interruption or the overlow alternating voltage is detected, the charging and discharging process is immediately stopped, the function of the backup power supply is automatically exerted through the seamless connection device, and the influence on the reliability of the direct current system caused by continuous discharging or charging is prevented.
(2) The communication is interrupted. When in remote control, the communication interruption can cause the upper computer to be incapable of monitoring the charging and discharging process to generate great potential safety hazards, after the upper computer software cannot receive the lower computer feedback signal, the device continuously sends a reconnection request for a preset time, if the communication is not recovered yet, the communication interruption is judged, the device does not receive an upper computer software instruction within a fixed time period, and the charging and discharging process is automatically stopped.
(3) The relay state is abnormal. The single chip microcomputer detects the position state of the relay, and when detecting that the relay is not consistent with the state description, the single chip microcomputer automatically stops charging and discharging.
(4) The state of the battery is abnormal. And when the conditions of undervoltage, overcharging, overdischarging, overhigh temperature of the pole and the like of the storage battery are detected, alarming is carried out, and the charging and the discharging are stopped.
(5) The bi-directional DC/AC conversion module is abnormal. And when the inversion discharge is carried out, detecting that the discharge voltage is higher than the voltage standard value of the boosting module or the discharge current detection value is negative, judging that the bidirectional DC/AC conversion module is abnormal due to abnormal data receiving and transmitting of the communication interface, and interrupting the charge and discharge.
(6) The device temperature is abnormal. The temperature sensor detects that the temperature inside the device exceeds a set range, judges that the temperature of the device is abnormal, interrupts charging and discharging, and prevents equipment from being damaged.
In conclusion, by adopting the online capacity checking method for the substation storage battery provided by the embodiment of the invention, operation and maintenance staff can remotely and automatically perform online capacity checking work of the storage battery, and meanwhile, the safety and reliability of the operation of the direct current system in the substation are not affected. Meanwhile, the method can completely replace a manual traditional mode, effectively reduces the risk of manual misoperation, can discover the latent fault of the storage battery in advance, effectively improves the health management level of a power supply system of a transformer substation and the storage battery, and has great significance for equipment safety and digital transformation, quality improvement and efficiency improvement of operation and maintenance work.
In addition, by applying the online capacity checking method of the substation storage battery provided by the embodiment of the invention, the direct benefit is to save the labor cost of annual discharging operation and save the electric energy loss of annual discharging. The indirect benefit is energy saving and emission reduction, and carbon emission generated by discharge is reduced. Meanwhile, the risk of misoperation during manual operation is reduced, the working efficiency is effectively improved, and the safety level of personnel, equipment and a power grid is improved.
The transformer substation storage battery online capacity checking system provided by the embodiment of the invention is introduced, the transformer substation storage battery online capacity checking system described below can be regarded as a module architecture for realizing the transformer substation storage battery online capacity checking method provided by the embodiment of the invention, and the following description can be referred to with the above.
Optionally, referring to fig. 4, fig. 4 is a structural block diagram of an online core-capacitor system of a substation storage battery provided in an embodiment of the present invention, where the system may include:
the acquisition unit 10 is used for acquiring a nuclear capacity discharge instruction;
An inverter unit 20 for inverting the direct current outputted from the storage battery into a target alternating current having a voltage equal to a required voltage of the target load in response to the nuclear capacity discharge instruction;
the execution unit 30 is used for supplying power to a target load based on the target alternating current so as to realize the nuclear capacity discharge of the storage battery;
the required current of the target load is the target discharge current when the storage battery nuclear capacity is discharged.
Optionally, the execution unit 30 is specifically configured to:
regulating the target alternating current based on the required current of the target load;
And supplying power to the target load based on the regulated target alternating current.
Optionally, referring to fig. 5, fig. 5 is a block diagram illustrating a structure of another online nuclear capacity system of a substation storage battery according to an embodiment of the present invention, and on the basis of the embodiment shown in fig. 4, the system further includes:
The first load determining unit 40 is configured to obtain, in response to the nuclear capacity discharge instruction, a required current of each load in a substation, where the loads have a connection relationship with the storage battery according to a preset period;
the target load in the current preset period is determined based on the required current and the target discharge current of each load.
Optionally, referring to fig. 6, fig. 6 is a block diagram illustrating a structure of another online nuclear capacity system of a substation storage battery according to an embodiment of the present invention, and on the basis of the embodiment shown in fig. 4, the system further includes:
The second load determining unit 50 is configured to obtain, within a preset duration, a required current of each load in a substation, where the required current has a connection relationship with the storage battery, according to a preset frequency;
Based on the required current of each load, determining a preselected load, wherein the preselected load is a load with the constant current requirement in the nuclear capacity discharging duration of the storage battery;
The target load is determined among the preselected loads based on the target discharge current and the period of time during which the current demand of each preselected load remains unchanged.
Optionally, the nuclear capacity discharge instruction is generated at a target time, the target time is within a period when the demand of the target load for the current remains unchanged, and a duration from the target time to an end time of the period when the demand of the target load for the current remains unchanged is greater than or equal to a nuclear capacity discharge duration of the storage battery.
Optionally, the execution unit 30 is further configured to:
monitoring whether the discharge state of the storage battery is normal or not in real time;
When it is determined that the discharge state of the battery is abnormal, the nuclear capacity discharge of the battery is stopped.
Optionally, the execution unit 30 is further configured to:
after the nuclear capacity discharge of the storage battery is finished, the storage battery is charged.
Optionally, the embodiment of the invention further provides a transformer substation, which comprises a transformer substation body and the transformer substation storage battery online nuclear capacity system provided by any embodiment.
An electronic device provided by an embodiment of the present application is described below with reference to fig. 7, and may include at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;
In the embodiment of the present invention, the number of the processor 100, the communication interface 200, the memory 300 and the communication bus 400 is at least one, and the processor 100, the communication interface 200 and the memory 300 complete the communication with each other through the communication bus 400;
alternatively, the communication interface 200 may be an interface of a communication module, such as a GSM module, and the processor 100 may be a central processing unit CPU, or an Application-specific integrated Circuit ASIC (Application SPECIFIC INTEGRATED Circuit), or one or more integrated circuits configured to implement embodiments of the present invention.
Memory 300 may comprise high-speed RAM memory or may further comprise non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 100 is specifically configured to execute an application program in the memory, so as to implement the steps of the crane hoisting steel wire rope installation control method.
The foregoing examples are provided for clarity of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (9)
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| CN119581710A (en) * | 2025-02-07 | 2025-03-07 | 华能澜沧江水电股份有限公司 | A bidirectional parallel battery capacity control system and method |
| CN120281030B (en) * | 2025-04-08 | 2025-10-14 | 国网江苏省电力有限公司淮安供电分公司 | A bus voltage stabilization control device and method during power supply core capacity |
| CN120474150A (en) * | 2025-06-18 | 2025-08-12 | 浙江广曜数智科技有限公司 | A battery remote charge and discharge control and life prediction system and method |
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| CN102175977B (en) * | 2011-01-30 | 2013-08-21 | 刘连仲 | Lithium battery detection device with mutual charge/discharge function |
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