CN201435620Y - High-voltage user power monitoring and operation management system - Google Patents

Abstract

The utility model discloses a high-voltage user electric energy monitoring and operation management system, which comprises a front-end data acquisition device installed on each circuit breaker in a three-phase power supply line for real-time monitoring of the line operation status of the corresponding power supply section, and a front-end data collection device. The background management system for two-way communication of the acquisition device through wireless communication and the data transmission device for realizing two-way communication between the two; A user-side abnormality monitoring circuit for real-time monitoring of whether electricity theft, phase loss, overcurrent, voltage loss or overload occurs on the side, a microprocessor MCU and a power supply unit for supplying power to the microprocessor MCU. The utility model has the advantages of reasonable design, convenient use and operation, high degree of intelligence, safe and reliable performance, can effectively solve various practical problems existing in the electric energy monitoring of high-voltage users, and has very good use effect.

Description

High-voltage user power monitoring and operation management system

technical field

The utility model belongs to the technical field of electric power system monitoring and control, in particular to a high-voltage user electric energy monitoring and operation management system.

Background technique

With the continuous development of the market economy, the general growth of social demand has driven the continuous expansion of power demand, and the production and supply of power is becoming increasingly scarce relative to the demand. Therefore, scientific management of power loads has become an urgent need. On the other hand, the number of high-voltage users is also increasing accordingly. Due to the great difficulty in the management of high-voltage users, current users have been repeatedly prohibited from stealing electricity, and system failures have occurred frequently due to user-side failures, which have greatly affected the power grid. Therefore, the load monitoring of high-voltage users in the distribution network has become the development trend of the power system. The installed power load control device is a technical means to implement the relevant national planned power consumption policies and realize control to households. important measures.

Utility model content

The technical problem to be solved by the utility model is to provide a high-voltage user electric energy monitoring and operation management system, which is reasonable in design, easy to use and operate, high in intelligence, safe and reliable in performance, and can effectively solve Various practical problems exist in high-voltage user electric energy monitoring and the application effect is very good.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-voltage user electric energy monitoring and operation management system, which is characterized in that: it includes a circuit breaker installed on each circuit breaker in the three-phase power supply line and connected to the corresponding power supply section The front-end data acquisition device for real-time monitoring of the operating status, the background management system for two-way communication with the front-end data acquisition device through wireless communication, and the data transmission device for realizing two-way communication between the front-end data acquisition device and the background management system; the front-end data acquisition The device includes a line fault monitoring circuit for real-time monitoring of single-phase grounding faults and phase-to-phase short-circuit faults, and a user-side abnormality monitoring circuit for real-time monitoring of whether electricity theft, phase loss, overcurrent, voltage loss or overload occurs on the user side , Analyze and judge the signals monitored by the line fault monitoring circuit and the abnormal situation monitoring circuit on the user side, store and upload the judgment results to the background management system synchronously, and can control the opening and closing of the circuit breaker according to the control instructions of the background management system and can respond accordingly The microprocessor MCU for removing or isolating the fault section and the power supply unit for supplying power to the microprocessor MCU; The section where the line fault occurs and the section where the abnormal situation occurs on the user side are correspondingly alarmed and stored, and the control computer that sends control instructions to the microprocessor MCU synchronously; the line fault monitoring circuit and the abnormal situation monitoring circuit on the user side are connected to the micro The processor MCU and the microprocessor MCU are respectively connected to the circuit breaker and the auxiliary switch of the circuit breaker, and the microprocessor MCU and the background management system perform two-way communication.

The single-phase grounding monitoring circuit for monitoring single-phase grounding faults in the line fault monitoring circuit includes a zero-sequence current transformer for real-time monitoring of the zero-sequence current, an I/V conversion circuit connected with the zero-sequence current transformer, A frequency-selective amplifier circuit connected to the I/V conversion circuit, a power frequency filter circuit and a different-frequency filter circuit respectively connected to the frequency-selective amplifier circuit, and a multi-choice one connected to the power frequency filter circuit and the different-frequency filter circuit respectively An analog switch and an A/D conversion circuit connected with one of the multiple analog switches, the A/D conversion circuit is connected to the microprocessor MCU; the phase-to-phase short-circuit fault monitoring circuit that monitors the phase-to-phase short-circuit fault in the line fault monitoring circuit It includes a current transformer group connected in sequence to monitor the ABC three-phase current in real time, a full-bridge rectifier circuit, a signal amplification circuit, and a comparator for comparing the output signal of the signal amplification circuit with the set threshold. The device is connected to the microprocessor MCU.

The user-side abnormal situation monitoring circuit includes a current transformer group and a voltage transformer group for real-time monitoring of the ABC three-phase voltage respectively, and the current transformer group and the voltage transformer group are all connected to the microprocessor MCU, and the current The transformer group and the potential transformer group are connected with the microprocessor MCU to be connected with a metering module for metering the line electricity cost.

The communication mode between the front-end data acquisition device and the background management system is GSM, CDMA, GPRS or SMS communication mode.

The front-end data acquisition device adopts a sealed casing made of aluminum-steel material, and a suspension mechanism is arranged on the sealed casing.

Compared with the prior art, the utility model has the following advantages:

1. The background management system can display the distribution of high-voltage users and the operation status, legend and brief description of the circuit breaker on the pole.

2. Real-time monitoring of the load operation of each user through the front-end data acquisition device, timely detection of unsafe factors, elimination of hidden dangers of accidents, and safe operation of the distribution network.

3. Through the system monitoring function, the failure of the user's meter can be found in time to prevent electricity theft and loss of electricity consumption. When necessary, remote power-off control can be implemented for users.

4. The system has a fault diagnosis function, which can detect and isolate the fault section in time, ensure the normal power supply of non-fault users, and shorten the fault processing time.

5. Statistical voltage qualification rate, power supply reliability rate, power factor and other data within the set time period.

6. The high-voltage switch used in the system can be used directly by modifying the user's switch. The realization of the system's power supply and voltage measurement functions does not require a high-voltage PT, which can save investment costs.

7. The system integrates multiple functions such as user load monitoring, fault judgment, fault removal, voltage qualification rate, and power supply reliability assessment.

8. It fully complies with the terminal requirements of the newly issued "Power Load Management System Function Specification" and "General Technical Conditions of Power Load Management System" issued by the State Grid Corporation, and fully realizes the "Power Load Management System Data Transmission Protocol-2004". Support DL/T645-1997 protocol and various domestic and foreign common meter protocols in the industry.

9. Flexible communication methods: There are more independent serial buses on the terminal, and it is easy to connect a variety of functional modules to make the terminal have better scalability; the terminal communication module can be flexibly configured according to different communication conditions of users (different plug-ins can be selected) ), support GSM/GPRS/SMS/CDMA and other wireless network communication methods.

10. The terminal has excellent electromagnetic compatibility performance, can resist the interference of high-voltage sharp pulses, strong magnetic fields, strong static electricity, and lightning surges, and has a strong range of temperature adaptive capabilities; each circuit board module adopts multi-level software and hardware gatekeepers Dog circuit and reset circuit, terminal operation is safe and reliable and easy to maintain.

11. Sealed design, aluminum steel material, wall-mounted structure, light in size and easy to install.

12. Excellent performance, the working temperature is -25°C-+70°C, the voltage and current measurement accuracy is 1.0, the backup power supply can maintain the working time for 7 days, the performance of the whole machine and the anti-interference performance of the system meet the requirements of the industry standard.

13. Wide application prospects. After the system is put into operation, it can timely and accurately feed back the power information and fault information of high-voltage power users to the main station, and realize remote automatic meter reading, power quality monitoring, power factor monitoring, and quick removal of user side Fault and other functions will play a positive role in effectively improving the anti-stealing function of metering equipment, reducing line loss, and improving the fairness, fairness, and accuracy of electric energy metering.

To sum up, the utility model is reasonable in design, easy to use and operate, high in intelligence and safe and reliable in performance. This system is a professional equipment that integrates modern microelectronic technology and computer technology, and integrates power consumption management and load control. , is an important part of realizing the modernization of demand side management, and is also a supporting terminal product of the power load management system. The large user power management terminal realizes load monitoring and control, and can realize automatic meter reading, metering equipment monitoring and anti-theft electricity. It combines the relevant national technical indicators and the actual needs of the majority of power users, and is designed and developed by using advanced GSM/GPRS/CDMA mobile network communication technology and high-speed single-chip microcomputer. It has wide signal coverage, good stability, strong practicability, and powerful functions. Features, can be widely used in the field of electric power management and service, and has high practical value, so the utility model can effectively solve various practical problems in the monitoring of high-voltage user electric energy, and the use effect is very good.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the circuit block diagram of the utility model.

Explanation of reference signs:

1- Front-end data acquisition device; 1-1- Line fault monitoring circuit 1-11- Zero-sequence current mutual inductance

road; device;

1-12-I/V conversion circuit; 1-13-frequency selection amplifier circuit; 1-14-power frequency filter circuit;

1-15-Different frequency filter circuit; 1-16-Multi-select one analog open 1-17-A/D conversion circuit;

close;

1-18-current transformer group; 1-19-full bridge rectifier circuit; 1-20-signal amplification circuit;

1-10-comparator; 1-2-user side abnormal situation 1-21-voltage transformer group;

monitoring circuit;

1-22-metering module; 1-3-microprocessor MCU; 1-4-power supply unit;

1-41-battery; 1-42-battery protection module; 1-43-voltage regulator module one;

1-44-high voltage capacitor; 1-45-rectifier and filter circuit; 1-46-voltage regulator module two;

2-background management system; 3-data transmission device; 4-circuit breaker;

5- Circuit breaker auxiliary switch.

Detailed ways

As shown in Figure 1, the utility model includes a front-end data acquisition device 1 which is installed on each circuit breaker 4 in the three-phase power supply line and carries out real-time monitoring of the line operation status of the corresponding power supply section, and the front-end data acquisition device 1 through wireless The communication mode is a background management system 2 for two-way communication and a data transmission device 3 for realizing two-way communication between the front-end data collection device 1 and the background management system 2 . The communication mode between the front-end data acquisition device 1 and the background management system 2 is GSM, CDMA, GPRS or SMS communication mode. The front-end data acquisition device 1 adopts a sealed casing made of aluminum-steel material, and a suspension mechanism is arranged on the sealed casing.

The front-end data acquisition device 1 includes a line fault monitoring circuit 1-1 for real-time monitoring of single-phase ground faults and phase-to-phase short-circuit faults, and monitors whether electricity theft, phase loss, overcurrent, voltage loss or overload occurs on the user side. Real-time monitoring user-side abnormal situation monitoring circuit 1-2, analyzing and judging the signals monitored by the line fault monitoring circuit 1-1 and user-side abnormal situation monitoring circuit 1-2, storing and synchronously uploading the judgment results to the background management system 2 And the microprocessor MCU1-3 that can control the opening and closing action of the circuit breaker 4 according to the control command of the background management system 2 and can cut off or isolate the faulty section correspondingly and the power supply unit 1-3 that supplies power to the microprocessor MCU1-3 4. The background management system 2 is to comprehensively analyze and process the data transmitted by the front-end data acquisition device 1, and correspondingly determine the specific line fault occurrence section and the user-side abnormal situation occurrence section, and correspondingly alarm and store records and synchronize A control computer that sends control commands to the microprocessors MCU1-3. The line fault monitoring circuit 1-1 and the user side abnormal situation monitoring circuit 1-2 are all connected to the microprocessor MCU1-3, and the microprocessor MCU1-3 is respectively connected to the circuit breaker 4 and the circuit breaker auxiliary switch 5, and the microprocessing Two-way communication between MCU1-3 and background management system 2.

The single-phase grounding monitoring circuit for monitoring single-phase grounding faults in the line fault monitoring circuit 1-1 includes a zero-sequence current transformer 1-11 for real-time monitoring of the zero-sequence current, and a zero-sequence current transformer 1-11 The connected I/V conversion circuit 1-12, the frequency selection amplifier circuit 1-13 connected with the I/V conversion circuit 1-12, the power frequency filter circuit 1-13 connected with the frequency selection amplifier circuit 1-13 respectively 14 and the different frequency filter circuit 1-15, the multi-choice one analog switch 1-16 connected with the power frequency filter circuit 1-14 and the different frequency filter circuit 1-15 respectively and the multi-choice one analog switch 1-16 connected A/D conversion circuits 1-17. The A/D conversion circuit 1-17 is connected to the microprocessor MCU1-3.

The phase-to-phase short-circuit fault monitoring circuit that monitors phase-to-phase short-circuit faults in the line fault monitoring circuit 1-1 includes a current transformer group 1-18 and a full-bridge rectifier circuit 1 that are connected in sequence to the ABC three-phase currents that are monitored in real time. -19. The signal amplifying circuit 1-20 and the comparator 1-10 for comparing the output signal of the signal amplifying circuit 1-20 with the set threshold, and the comparator 1-10 is connected to the microprocessor MCU1-3.

The user-side abnormal situation monitoring circuit 1-2 includes a current transformer group 1-18 and a voltage transformer group 1-21 for real-time monitoring of the ABC three-phase voltage respectively, a current transformer group 1-18 and a voltage transformer group 1-21 are all connected to the microprocessor MCU1-3, and the current transformer group 1-18 and the voltage transformer group 1-21 are connected to the microprocessor MCU1-3 with a metering module for measuring the line electricity cost 1-22.

The working process of the present utility model is: the front-end data acquisition device 1 monitors the current and voltage of the user incoming line side on the monitored power supply section in real time through its line fault monitoring circuit 1-1 and the user side abnormal situation monitoring circuit 1-2 , Active power, reactive power, single-phase grounding, phase-to-phase short-circuit faults, etc., and at the same time through the microprocessor MCU1-3 to analyze and process the monitoring data, it has alarm functions such as phase loss, over-current, and voltage loss, and it is for the user In the event of single-phase grounding and phase-to-phase short-circuit faults, it has the functions of automatic monitoring, alarm and automatic isolation of faults, and can automatically record and store data at the same time. In addition, the microprocessor MCU1-3 transmits the monitored and judged data to the background management system 2.

The background management system 2 receives the monitoring data sent by the front-end data acquisition device 1, which is specifically the microprocessor MCU1-3, and monitors the power consumption status of each user in real time, and finds that abnormal conditions (such as power theft, overload, etc.) occur on the user side. Electricity) through the microprocessor MCU1-3 remote opening and closing circuit breaker 4 for load control. When a line fault occurs on the user side, the system can quickly determine the faulty section, and remotely control the front-end data acquisition device 1 to isolate or cut off the corresponding faulty section. At the same time, the background management system 2 also has functions such as historical data query, report printing, and accident recall. Large users perform reactive power compensation to improve power factor and reduce line loss, thereby improving the load capacity and power supply quality of the power grid; and can accurately record the daily peak, valley, and flat periods of the user terminal and 24-hour power load and power consumption and load utilization. From the total load curve, the dispatcher can see the load fluctuations, analyze the power consumption status, and can promptly notify the user to take measures to cut peaks and fill valleys, adjust load and save electricity, increase revenue and reduce expenditure, and provide reliable data for scientific and reasonable dispatch.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (5)

1. high pressure user power energy monitoring and controlling and operation management system is characterized in that: the data transmission device (3) that comprises the front end data acquisition device (1) that is installed in that each circuit breaker (4) in the three-phase power line is gone up and the circuit running status of corresponding power supply section is monitored in real time, carries out two-way communication between the background management system (2) of two-way communication and realization front end data acquisition device (1) and background management system (2) by communication with front end data acquisition device (1); Described front end data acquisition device (1) comprises the line fault observation circuit (1-1) that single phase ground fault and phase fault are monitored in real time, whether user side stealing is taken place, phase shortage, overcurrent, the user side abnormal conditions observation circuit (1-2) that decompression or overload situation are monitored in real time, line fault observation circuit (1-1) and user side abnormal conditions observation circuit (1-2) institute monitor signal are carried out analysis and judgement, storage also is uploaded to background management system (2) synchronously with judged result and can and can tackles that fault section excises or microprocessor MCU (1-3) that isolates and the power supply unit (1-4) that microprocessor MCU (1-3) is powered according to the control command of background management system (2) control circuit breaker (4) deciliter action mutually; Described background management system (2) carries out comprehensive analysis processing and corresponding judgement for the data that front end data acquisition device (1) is transmitted and draws concrete line fault generation section and user side abnormal conditions generation section and corresponding the warning and stored record and synchronously to the control computer of microprocessor MCU (1-3) sending controling instruction; Described line fault observation circuit (1-1) and user side abnormal conditions observation circuit (1-2) all meet microprocessor MCU (1-3), microprocessor MCU (1-3) joins with circuit breaker (4) and auxiliary switch for circuit breaker (5) respectively, carries out two-way communication between microprocessor MCU (1-3) and background management system (2).

2. according to claim 1 described high pressure user power energy monitoring and controlling and operation management system, it is characterized in that: the single-phase earthing observation circuit of in the described line fault observation circuit (1-1) single phase ground fault being monitored comprises the zero sequence current mutual inductor (1-11) that zero-sequence current is monitored in real time, the I/V change-over circuit (1-12) that joins with zero sequence current mutual inductor (1-11), the selective frequency amplifier circuit (1-13) that joins with I/V change-over circuit (1-12), power frequency filter circuit (1-14) and the alien frequencies filter circuit (1-15) that joins with selective frequency amplifier circuit (1-13) respectively, multiselect one analog switch (1-16) that joins with power frequency filter circuit (1-14) and alien frequencies filter circuit (1-15) and the A/D change-over circuit (1-17) that joins with multiselect one analog switch (1-16) respectively, described A/D change-over circuit (1-17) meets microprocessor MCU (1-3); The phase fault observation circuit of in the described line fault observation circuit (1-1) phase fault being monitored comprise the current transformer group (1-18) of respectively the ABC three-phase current being monitored in real time of joining successively, full bridge rectifier (1-19), signal amplification circuit (1-20) and to signal amplification circuit (1-20) institute output signal with set the comparator (1-10) that threshold value compares, described comparator (1-10) meets microprocessor MCU (1-3).

3. according to claim 2 described high pressure user power energy monitoring and controlling and operation management system, it is characterized in that: described user side abnormal conditions observation circuit (1-2) comprises current transformer group (1-18) and the voltage transformer group (1-21) of respectively the ABC three-phase voltage being monitored in real time, current transformer group (1-18) and voltage transformer group (1-21) are all joined with microprocessor MCU (1-3), and described current transformer group (1-18) and voltage transformer group (1-21) are connected to the metering module (1-22) that the circuit electricity cost is measured with microprocessor MCU (1-3).

4. according to claim 1,2 or 3 described high pressure user power energy monitoring and controlling and operation management systems, it is characterized in that: the communication mode between described front end data acquisition device (1) and the background management system (2) is GSM, CDMA, GPRS or SMS communication mode.

5. according to claim 1,2 or 3 described high pressure user power energy monitoring and controlling and operation management systems, it is characterized in that: described front end data acquisition device (1) adopts the can of being made by the aluminum steel material, and described can is provided with hitch.

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