CN210016268U - Control system of acceleration function after line reclosing - Google Patents

Abstract

The utility model relates to a reclosing lock field discloses a function control system accelerates after circuit reclosing for solve present circuit reclosing lock after function control system can only rely on single reclosing lock after protection action condition accelerates, when circuit power transmission appears easily after the protection malfunction tripping operation problem accelerates. The utility model discloses in, the input of current protection action signal keeping module is connected simultaneously to the output of current protection action module, the input of protection action module accelerates after the reclosing, circuit breaker signal end is connected to circuit breaker position change judgment module's input, the output of current protection action signal keeping module is connected simultaneously to the input of action module accelerates after the reclosing, the output of protection action module accelerates after the reclosing, the output of circuit breaker position change judgment module, the input of circuit breaker tripping operation module is connected to the output of action module accelerates after the reclosing. The utility model is suitable for a circuit reclosing back function control with higher speed.

Description

Control system of acceleration function after line reclosing

technical field

The utility model relates to the field of reclosing, in particular to a control system for an acceleration function after line reclosing.

Background technique

Reclosing is an important part of the relay protection of overhead lines. When a fault trip occurs in the line, the reclosing starts and the switch is re-closed. If it is a transient fault, the reclosing is successful. If it is a permanent fault, the reclosing accelerates the logic action. Switch off without delay. The main purpose is to ensure the reliability of power supply. According to statistics, 90% of line faults are transient faults. Therefore, enabling the reclosing device greatly improves the reliability of power supply.

In the current post-reclosing acceleration function control system, the post-reclosing acceleration protection action logic only introduces the position signal of the circuit breaker as the blocking condition, so as long as the current reaches the post-reclosing acceleration protection action value, it will trip, as shown in Figure 1. The acceleration logic after reclosing is: the circuit breaker is switched from opening to closing, and the current value reaches the acceleration protection action value after reclosing, then the outlet of the acceleration protection action after reclosing trips the circuit breaker, which makes the acceleration protection after reclosing transmit power on the line There is a possibility of misoperation at times, resulting in non-fault tripping of lines and power outages of equipment, affecting the life and production of power users.

Utility model content

The technical problem to be solved by the utility model is: to provide a control system for the acceleration function after line reclosing, which is used to solve the problem that the current acceleration function control system after line reclosing can only rely on a single post-reclosing acceleration protection action condition, which is prone to line transmission. The problem that the acceleration protection malfunctions and trips after reclosing during power-on.

In order to solve the above-mentioned problems, the technical scheme adopted by the present utility model is: a control system for acceleration function after line reclosing, including a current protection action module, an acceleration module after reclosing and a circuit breaker tripping module; the acceleration module after reclosing includes a current protection module. Action signal holding module, circuit breaker position change judgment module, post-reclosing acceleration protection action module and post-reclosing acceleration action module;

Wherein, the input end of the current protection action module is used to connect the current signal end, the output end of the current protection action module is connected to the input end of the current protection action signal holding module and the input end of the reclosing acceleration protection action module at the same time, The input end of the circuit breaker position change judgment module is used to connect to the circuit breaker signal end, the input end of the post-reclosing acceleration action module is simultaneously connected to the output end of the current protection action signal holding module, and the post-reclosing acceleration protection action module is connected to the output end. The output end, the output end of the circuit breaker position change judgment module, the output end of the reclosing acceleration action module is connected to the input end of the circuit breaker tripping module.

Specifically, the current protection action signal holding module may include a signal holding device 1 and a timer 1, wherein the input end of the signal holding device 1 is respectively connected to the output end of the current protection action module and the output end of the timer 1, and the signal keeping The output end of the device 1 is connected to the input end of the acceleration action module after reclosing.

Specifically, the circuit breaker position change judging module may include a second signal holding device, a second timer, and a closing position signaling device, wherein the input end of the second signal maintaining device and the input end of the closing position signaling device are respectively used for connecting The circuit breaker signal terminal, the output terminal of the timer 2 is connected to the input terminal of the signal holding device 2, the output terminal of the signal holding device 2 and the output terminal of the closing position signal device are also connected to the input terminal of the reclosing acceleration action module.

Further, the first timer and the second timer can be settable time relays.

Specifically, the current protection action module may be a current protection relay.

Specifically, the post-reclosing acceleration protection action module may be an intermediate relay.

Specifically, the post-reclosing acceleration action module may be a logic judgment outlet relay.

Specifically, the circuit breaker trip module generally consists of a circuit breaker normally open auxiliary contact and a circuit breaker trip coil, wherein the circuit breaker normally open auxiliary contact is connected in series with the circuit breaker trip coil to protect the circuit.

The beneficial effects of the utility model are: the utility model provides a line reclosing acceleration function control system, which can pass the current protection action signal caused by the line fault, the acceleration protection action signal after reclosing, and the circuit breaker from opening to closing action. The combination of conditions realizes the reliable action judgment of the acceleration protection after reclosing, and effectively avoids the possibility of misoperation of the acceleration protection after reclosing when the line is powered on, as well as causing non-fault tripping of the line and equipment power outage. Moreover, the equipment cost implemented by the utility model is low, and the utility model can be widely used in the field of line microcomputer protection.

Description of drawings

Fig. 1 shows the action logic of the existing acceleration protection after reclosing.

FIG. 2 is a schematic block diagram of the control system for the acceleration function after line reclosing according to the embodiment.

FIG. 3 is a schematic structural diagram of a circuit breaker tripping module according to an embodiment.

The number in the figure: 100 is the current protection action signal holding module, and 200 is the circuit breaker position change judgment module.

Detailed ways

In order to solve the problem that the post-reclosing acceleration protection action condition is single in the current line post-reclosing acceleration function control system, and the faulty tripping of the post-reclosing acceleration protection is prone to occur when the line is powered on, the embodiment provides a line reclosing acceleration protection The function control system, as shown in Figure 2, specifically includes a current signal terminal, a circuit breaker signal terminal, a current protection action module, a post-reclosing acceleration module and a circuit breaker trip module; the post-reclosing acceleration module includes a current protection action signal hold module 100, a circuit breaker position change judgment module 200, a post-reclosing acceleration protection action module and a post-reclosing acceleration action module;

The input end of the current protection action module is connected to the current signal end, and the output end of the current protection action module is simultaneously connected to the input end of the current protection action signal holding module 100 and the input end of the reclosing acceleration protection action module. The input end of the circuit breaker position change judgment module 200 is connected to the signal end of the circuit breaker, the input end of the post-reclosing acceleration action module is simultaneously connected to the output end of the current protection action signal holding module 100, the output end of the post-reclosing acceleration protection action module, The output end of the circuit breaker position change judgment module 200, the output end of the reclosing acceleration action module is connected to the input end of the circuit breaker tripping module.

In the embodiment, the current protection action signal holding module 100 includes a signal holding device 1 and a timer 1, the input end of the signal holding device 1 is respectively connected to the output end of the current protection action module, the output end of the timer 1, and the signal holding device. The output end of one is connected to the input end of the acceleration action module after reclosing.

In an embodiment, the circuit breaker position change judgment module 200 includes a second signal holding device, a second timer, and a closing position signaling device. The input end of the second signal maintaining device and the input end of the closing position signaling device are respectively used to connect the circuit breaker The output terminal of the timer 2 is connected to the input terminal of the signal holding device 2, the output terminal of the signal holding device 2 and the output terminal of the closing position signal device are also connected to the input terminal of the acceleration action module after reclosing. Wherein, the closing position signal device is the open and closed position signals of the circuit breaker in FIG. 1 . Generally, the circuit breaker provides a passive position contact, which is divided into: normally closed contact (the contact is closed when the circuit breaker is in the open position, and the contact is open when the circuit breaker is in the closed position) and normally open contact (contrary to the normally closed contact, open open at the closing position, closed at the closing position), the digital input point of the microcomputer protection device is connected to the position contact of the circuit breaker to realize the judgment of the position of the circuit breaker by the protection device, and some devices take a normally open or normally closed contact, Some devices use one normally open and one normally closed (two-point judgment is more accurate, avoiding signal errors caused by poor contact); and the judgment of the protection device is realized by the relay inside the protection device.

As shown in Figure 3, the circuit breaker trip module is composed of a circuit breaker normally open auxiliary contact and a circuit breaker trip coil. The circuit breaker normally open auxiliary contact and the circuit breaker trip coil are connected in series to protect the circuit.

In the embodiment, the timer 1 and timer 2 are settable time relays; the post-reclosing acceleration protection action module is an intermediate relay; the post-reclosing acceleration action module is a logic judgment outlet relay; the The current protection action module is a current protection relay, and its adjustment range is generally 0ms to 10000ms.

Based on the above hardware system, after loading the logic program in the embodiment, a feasible working principle is as follows:

When the line is faulty, the current signal enters the current protection action module from the current signal terminal, and the action signal output by the current protection action module enters the signal holding device and is output by the timer to realize the condition 1 for accelerated action after reclosing within the set time;

The output action signal of the current protection action module will also enter the post-reclosing acceleration protection action module, and the post-reclosing acceleration protection action module outputs the condition 2 to realize the post-reclosing acceleration action;

The circuit breaker opening signal at the signal end of the circuit breaker enters the signal holding device 2 (it can also be the circuit breaker closing signal entering the signal holding device 2, and then the signal holding device 2 first inverts it through logic editing and then outputs it) and outputs it through the timer 2 Condition 3 of the acceleration action after reclosing within the set time is realized;

The circuit breaker closing signal at the signal end of the circuit breaker enters the closing position signal device (it can also be the circuit breaker opening signal entering the closing position signal device, and then the closing position signal device is first inverted through logic editing and then output) without delay. Condition 4 to realize the acceleration action after reclosing within the set time;

The above-mentioned condition 1, condition 2, condition 3, and condition 4 signals all enter the post-reclosing acceleration action module, so the embodiment only operates when the condition 1, condition 2, condition 3, and condition 4 are all satisfied. The output signal is sent to the circuit breaker tripping module to complete the circuit breaker trip, which avoids the problem of false tripping of the acceleration protection after the reclosing caused by the single action condition of the acceleration protection after the reclosing.

To sum up, the embodiment provides a post-reclosing acceleration function control system, which realizes the reclosing through the current protection action signal caused by the line fault, the post-reclosing acceleration protection action signal, and the circuit breaker's operation condition from opening to closing. The reliable action judgment of the acceleration protection after reclosing can effectively avoid the possibility of misoperation of the acceleration protection after reclosing when the line is powered on, resulting in non-fault tripping of the line and power outage of the equipment. And the equipment cost is low, as long as the wire material cost is about 10 yuan, it can be widely used in the field of line computer protection.

Claims (6)

1. The post-reclosing acceleration function control system is characterized in that, comprising a current protection action module, a post-reclosing acceleration module and a circuit breaker tripping module; the post-reclosing acceleration module includes a current protection action signal holding module, a circuit breaker position Change judgment module, post-reclosing acceleration protection action module and post-reclosing acceleration action module; The input end of the current protection action module is used to connect the current signal end, the output end of the current protection action module is connected to the input end of the current protection action signal holding module and the input end of the acceleration protection action module after reclosing at the same time, the said The input end of the circuit breaker position change judgment module is used to connect the circuit breaker signal end, the input end of the post-reclosing acceleration action module is simultaneously connected to the output end of the current protection action signal holding module, and the output end of the post-reclosing acceleration protection action module and the output end of the circuit breaker position change judgment module, the output end of the reclosing acceleration action module is connected to the input end of the circuit breaker tripping module. 2. The post-circuit reclosing acceleration function control system according to claim 1, wherein the current protection action signal holding module comprises a signal holding device one and a timer one, wherein the input ends of the signal holding device one are respectively The output end of the current protection action module and the output end of the timer 1 are connected, and the output end of the signal holding device 1 is connected to the input end of the acceleration action module after reclosing. 3 . The post-circuit reclosing acceleration function control system according to claim 2 , wherein the circuit breaker position change judging module comprises a second signal holding device, a second timer, and a closing position signal device, wherein the signal holding device 2 . The input end of the device 2 and the input end of the closing position signal device are respectively used to connect the signal end of the circuit breaker. The output end of the device is connected to the input end of the acceleration action module after reclosing at the same time. 4 . The post-circuit reclosing acceleration function control system according to claim 3 , wherein the first timer and the second timer are settable time relays. 5 . 5 . The post-circuit reclosing acceleration function control system according to claim 1 , wherein the current protection action module is a current protection relay. 6 . 6. The post-circuit reclosing acceleration function control system according to claim 1, wherein the circuit breaker tripping module is composed of a circuit breaker normally open auxiliary contact and a circuit breaker trip coil, wherein the circuit breaker normally open auxiliary contact Connect in series with the circuit breaker trip coil.

Images