CN212784896U

CN212784896U - Automatic measurement and control terminal of intelligent distribution network

Info

Publication number: CN212784896U
Application number: CN202021530559.2U
Authority: CN
Inventors: 靳凛; 曾龙
Original assignee: Zhuhai Wodun Intelligent Power Grid Technology Co ltd
Current assignee: Zhuhai Wharton Intelligent Information Technology Co.,Ltd.
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-03-23
Anticipated expiration: 2030-07-29

Abstract

The utility model aims at providing a compact structure, functional stronger, the intelligent distribution network automation measurement and control terminal that barrier propterty is good. The utility model discloses a box body, be provided with fingerprint inductor, operating keyboard, display screen and a plurality of pilot lamp on the front panel of box body, be provided with the binding post that is used for connecting the looped netowrk cabinet on the rear panel of box body, be provided with the memory that measurement and control circuit and memory have the data contrast storehouse in the box body, the fingerprint inductor operating keyboard the display screen the pilot lamp reaches the memory all with measurement and control circuit electric connection, measurement and control circuit includes controller, power, protection circuit, opens circuit, communication circuit and exchanges the sample thief, controller and overcurrent protection soft clamp plate, overvoltage protection soft clamp plate, reclosing soft clamp plate, low-voltage protection soft clamp plate, zero sequence direction soft clamp plate, generating line ground connection soft clamp plate and overload soft clamp plate communication. The utility model discloses be applied to automation equipment's technical field.

Description

Automatic measurement and control terminal of intelligent distribution network

Technical Field

The utility model relates to an automation equipment's technical field, in particular to intelligent distribution network automation measurement and control terminal.

Background

The patent CN 208723530U discloses an intelligent microcomputer protection measurement and control device, which is a distribution network automation terminal developed mainly for the application of a ring main unit system, and has measurement and control functions of multi-electric quantity, remote signaling, remote measuring, remote control and the like, and also has functions of inter-phase current quick break, overcurrent, inverse time limit overcurrent protection of three action characteristic curves, zero sequence overcurrent protection, reclosing, overvoltage, low voltage protection and non-electric quantity protection tripping. But it does not adopt any secret measure, and anyone can operate it to adjust each item of data, and the protectiveness is lower. Therefore, the intelligent distribution network automatic measurement and control terminal is compact in structure, strong in functionality and good in protection performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a compact structure, functional stronger, the intelligent distribution network automation measurement and control terminal that barrier propterty is good.

The utility model adopts the technical proposal that: it includes the box body, be provided with fingerprint inductor, operating keyboard, display screen and a plurality of pilot lamp on the front panel of box body, be provided with the binding post that is used for connecting the looped netowrk cabinet on the rear panel of box body, it has the memory of data contrast storehouse to be provided with measurement and control circuit and memory in the box body, the fingerprint inductor operating keyboard the display screen the pilot lamp reaches the memory all with measurement and control circuit electric connection, measurement and control circuit includes controller, power, protection circuit, opens into circuit, communication circuit and exchanges the sample thief, controller and overcurrent protection soft clamp plate, overvoltage protection soft clamp plate, reclosing soft clamp plate, low-voltage protection soft clamp plate, zero sequence direction soft clamp plate, generating line ground connection soft clamp plate and overload soft clamp plate communication.

Furthermore, the number of the indicator lights is nine, and the indicator lights sequentially indicate operation, closing, energy storage, XT, YT, tripping, alarming, locking and communication from left to right.

Further, the operation keyboard comprises seven keys which are respectively an exit key, a reset key, a confirmation key, an up-shift key, a down-shift key, a left-shift key and a right-shift key.

Further, the open circuit comprises an input circuit with 10 switching values, and the input circuit is externally connected with a power supply.

Further, the power supply is a built-in power supply or an external power supply.

Furthermore, the communication circuit is an RS-485 communication bus interface and provides an open communication protocol for users.

The utility model has the advantages that: all the components are integrated in the box body, so that the terminal is compact, simple, small and convenient to install; the function that can not only realize prior art, in addition, this terminal need unblock before using, is used for responding to the fingerprint through setting up the fingerprint inductor, cooperates the memory, combines the data contrast storehouse of memory to realize the fingerprint unblock, also can input the password unblock through operating keyboard and display screen cooperation in addition, can avoid other people to operate this terminal from this, has better safeguard function.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a schematic perspective view of the rear view angle of the present invention;

FIG. 3 is a plan view of the connection terminal

Fig. 4 is a plan communication diagram of the present invention.

Detailed Description

As shown in fig. 1 to 4, in this embodiment, the utility model discloses a box body 1, be provided with fingerprint inductor 2, operating keyboard 3, display screen 4 and a plurality of pilot lamp 5 on the front panel of box body 1, be provided with the binding post 6 that is used for connecting the looped netowrk cabinet on the rear panel of box body 1, be provided with the measuring and control circuit in the box body 1 and have the memory of data contrast storehouse, fingerprint inductor 2 operating keyboard 3 display screen 4 pilot lamp 5 reaches the memory all with measuring and control circuit electric connection, the measuring and control circuit includes controller 8, power 9, protection circuit 10, opens circuit 11, communication circuit 12 and exchanges sample thief 13, controller 8 and overcurrent protection soft clamp plate, overvoltage protection soft clamp plate, reclosing soft clamp plate, low voltage protection soft clamp plate, zero sequence direction soft clamp plate, And the bus grounding soft pressing plate is communicated with the overload soft pressing plate. The terminal needs to be unlocked before use, the fingerprint sensor 2 is used for sensing the fingerprint of a user, is connected with the memory, and obtains whether to unlock or not by reading a data comparison database in the memory to perform data comparison; the operation keyboard 3 is matched with the display screen 4 and used for selecting a measurement and control task and inputting a password during unlocking, the display screen 4 can be used only after being unlocked before being used, the display screen 4 displays various data information such as password input, a measurement and control result, the measurement and control task and various menus, and the display screen 4 adopts a layered menu display mode and comprises five function menus of calibration, parameters, fixed values, recording and prediction; the indicator light 5 is used for prompting corresponding indication information of a user so that the user can know the information conveniently; the wiring terminal 6 is used for being electrically connected with the ring main unit; the controller 8 is used for information processing among various components, and is the core of the whole terminal;

in this embodiment, the number of the indicator lights 5 is nine, and the indication is running, closing, energy storage, XT, YT, trip, alarm, lock and communication from left to right. Nine indicating lamps respectively indicate an operation state, a switch state, a time voltage type flow state, a trip signal and an alarm signal, and the 'operation' indicating lamp flickers for 1 time every 1 second when the device operates normally; after the device sends a tripping command, a 'tripping' indicator lamp is protected and lightened until the front panel presses an exit key 31 to reset the device, and the device is not extinguished; after the device sends out the alarm command, the alarm indicator lamp is turned on until the front panel presses the exit key 31 to reset the device.

In the present invention, the operation keyboard 3 includes seven keys, i.e., an exit key 31, a reset key 32, a confirmation key 33, an up shift key 34, a down shift key 35, a left shift key 36, and a right shift key 37. And the keys are used for selecting tasks, so that various functions are realized.

The utility model discloses in, open circuit 11 includes the input circuit of 10 switching values, input circuit external power supply. The input loops (S1-S10) of 10 switching values are ten paths of remote communication volumes of switching positions, energy storage positions, earth knife positions, isolation knives, remote permission, locking superposition, manual reset, manual closing, manual opening and FA (feeder) switching on and off respectively.

In the present invention, the power supply 9 is an internal power supply or an external power supply.

In the present invention, the communication circuit 12 is an RS-485 communication bus interface and provides an open communication protocol to the user.

The terminal is functionally configured as follows:

1. quick-break protection: and the terminal samples the three-phase current, compares the three-phase current with a quick-break current setting value, and outputs a tripping drive after settable delay when the current is greater than the current setting value.

2. And (4) timing limit overcurrent protection: and the terminal samples the three-phase current, compares the three-phase current with the overcurrent current setting value, and outputs a tripping drive after settable delay when the current is greater than the current setting value.

3. Overload warning: and the terminal samples the three-phase current, compares the three-phase current with the overload current setting value, and outputs an alarm signal after settable delay when the monitored current is greater than the setting value.

4. Overcurrent protection: the terminal provides curve type selection under three conditions of extreme, general and extreme, and the time of tripping action is calculated by setting starting current and time multiple, and when the current is greater than the current setting value, the terminal outputs tripping drive after the calculated delay time.

5. Zero-sequence protection: the terminal samples the zero sequence current, compares with the zero sequence current setting value, when the monitored current is larger than the setting value, the terminal outputs a corresponding command after settable delay, the zero sequence 1 protection is trip driving, the zero sequence 2 is alarm signal output, and the user can respectively select tripping and alarm input or quit.

6. Overvoltage protection: when the terminal detects Uab and Ubc2, when one or more line voltages are greater than a voltage setting value, the terminal outputs a corresponding command after settable delay, overvoltage 1 protection is used as trip driving, overvoltage 2 is used as alarm signal output, and a user can respectively select tripping and alarm input or quit.

7. Low-voltage protection: the terminal detects Uab and Ubc, and when one or more line voltages are larger than the fixed value of the low-voltage protection voltage, the terminal is judged to be normally put into operation; if a certain phase voltage is smaller than the fixed value of the low-voltage protection voltage, the terminal outputs a corresponding command after settable delay, the low-voltage 1 protection is trip driving, the low-voltage 2 is alarm signal output, and a user can respectively select tripping and alarm input or exit.

8. Inputting a switching value: the terminal is provided with 10 switching value input loops (switching position, energy storage position, ground knife position, isolation knife, remote permission, locking coincidence, manual resetting, manual closing, manual opening and FA (feeder) on/off ten paths of remote communication quantity), the input loops are provided by an internal power supply (or the input loops need to be explained before ordering when an external power supply is needed for supplying power, and the power supply voltage can be customized by a user, if no special explanation is needed, the power supply voltage is generally consistent with the working voltage of the terminal, for example, the terminal working power supply is DC220V, the remote communication working power supply provides DC220V for the outside). The terminal fully considers the jitter removal measure of switching value acquisition on the aspects of hardware and software, and can distinguish the pulse width of 30ms without special requirements, and the distinguishing precision is 1 ms.

9. And (5) enabling FA to withdraw.

10. Event recording: the terminal can record 200 historical event records through the memory. The records comprise various types of events such as overcurrent protection action, switching value input deflection, equipment failure and the like, and each record comprises information such as a time scale (accurate to millisecond) of the event occurrence, various alternating current input quantity values when the event occurs, and input states of various switching values. Because the event information is recorded in the FLASH chip, the event information cannot be lost when the terminal is powered down. The event records are stored according to the sequence of the occurrence time, and when the number of the events exceeds 200, the terminal automatically and sequentially overwrites the oldest records with the latest records. The content of each event record can be viewed on the display screen 4 of the terminal, and the record can also be uploaded through the communication bus.

The utility model discloses an automatic measurement and control terminal of intelligence distribution network's functional characteristics do:

1. and a microprocessor with high integration level and no bus chip is adopted to process signals from the current transformer, and the output of the terminal is controlled through digital logic operation. The terminal has compact structure, maintenance-free design and good anti-interference performance.

2. The terminal has the advantages of simple and small structure, flattening, convenient and flexible installation and is suitable for compact installation conditions.

3. The terminal has strong data processing capacity by adopting a high-performance controller and a large-capacity nonvolatile memory.

4. The protection configuration is flexible and complete, and various protection functions can be freely switched on and off through menu control.

5. And by adopting a highly integrated hardware design scheme, the external interference is greatly reduced, and the terminal is more reliable.

6. The full Chinese liquid crystal display interface is adopted, multi-layer menu display is realized, and the human-computer interface is extremely friendly.

7. The terminal large-capacity nonvolatile memory ensures that 200 historical event records are recorded, the recorded content is detailed, and data is not lost when power is down.

8. The terminal has a perfect dynamic and static self-checking function, the working conditions of all parts of the terminal are monitored on line, and the working reliability of the terminal is ensured.

9. High-precision element and process guarantee terminal accuracy, reliability and long service life

10. The terminal provides an RS-485 communication bus interface and provides an open communication protocol for a user, thereby conveniently realizing the SCADA function.

While the embodiments of the present invention have been described in terms of practical embodiments, they are not intended to limit the scope of the invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. Automatic measurement and control terminal of intelligence distribution network, its characterized in that: it includes box body (1), be provided with fingerprint inductor (2), operating keyboard (3), display screen (4) and a plurality of pilot lamp (5) on the front panel of box body (1), be provided with binding post (6) that are used for connecting the looped netowrk cabinet on the rear panel of box body (1), be provided with in box body (1) and observe and control circuit and the memory that has the data comparison storehouse in, fingerprint inductor (2) operating keyboard (3), display screen (4), pilot lamp (5) reach the memory all with observe and control circuit electric connection, observe and control circuit includes controller (8), power (9), protection circuit (10), open circuit (11), communication circuit (12) and interchange sample thief (13), controller (8) and overcurrent protection soft clamp plate, overvoltage protection soft clamp plate, reclosing soft clamp plate, The low-voltage protection soft pressing plate, the zero sequence direction soft pressing plate, the bus grounding soft pressing plate and the overload soft pressing plate are communicated.

2. The intelligent distribution network automation measurement and control terminal of claim 1, characterized in that: the number of the indicator lamps (5) is nine, and the indicator lamps sequentially indicate operation, closing, energy storage, XT, YT, tripping, alarming, locking and communication from left to right.

3. The intelligent distribution network automation measurement and control terminal of claim 1, characterized in that: the operation keyboard (3) comprises seven keys which are respectively an exit key (31), a reset key (32), a confirmation key (33), an upward moving key (34), a downward moving key (35), a leftward moving key (36) and a rightward moving key (37).

4. The intelligent distribution network automation measurement and control terminal of claim 1, characterized in that: the open-circuit (11) comprises 10 input loops with switching values, and the input loops are externally connected with a power supply.

5. The intelligent distribution network automation measurement and control terminal of claim 1, characterized in that: the power supply (9) is a built-in power supply or an external power supply.

6. The intelligent distribution network automation measurement and control terminal of claim 1, characterized in that: the communication circuit (12) is an RS-485 communication bus interface and provides an open communication protocol for users.