CN210016268U - Acceleration function control system after circuit reclosing - Google Patents
Acceleration function control system after circuit reclosing Download PDFInfo
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- CN210016268U CN210016268U CN201921278624.4U CN201921278624U CN210016268U CN 210016268 U CN210016268 U CN 210016268U CN 201921278624 U CN201921278624 U CN 201921278624U CN 210016268 U CN210016268 U CN 210016268U
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- circuit breaker
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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
Technical Field
The utility model relates to a reclosing lock field, in particular to function control system accelerates after circuit reclosing lock.
Background
The reclosing is an important component of overhead line relay protection, when a line is in fault tripping, the reclosing is started, the switch is closed again, if the line is in transient fault, the reclosing is successful, and if the line is in permanent fault, the reclosing acceleration logic action is not delayed to switch off the switch. The main purpose is in order to guarantee the reliability of power supply, according to statistics, 90% of line faults are transient faults, so the reclosing device is started, and the reliability of power supply is greatly improved.
In the existing post-reclosing acceleration function control system of the line, the post-reclosing acceleration protection action logic only introduces a circuit breaker position signal as a locking condition, so that the action trip is carried out as long as the current reaches the post-reclosing acceleration protection action value, and the post-reclosing acceleration logic is as follows as shown in fig. 1: the circuit breakers are switched from the open state to the closed state, and the current value reaches the accelerated protection action value after the reclosing, the circuit breaker is tripped out of the accelerated protection action after the reclosing, so that the possibility of misoperation exists during power transmission of a circuit in the accelerated protection after the reclosing, the non-fault tripping of the circuit and the power failure of equipment are caused, and the life and the production of a power user are influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model provides a circuit is acceleration function control system after reclosing for solve present circuit and accelerate function control system after reclosing can only rely on single protection action condition after reclosing, the problem that the protection malfunction tripping operation that accelerates after reclosing appears easily when the circuit power transmission.
In order to solve the above problem, the utility model adopts the following technical scheme: the circuit reclosing post-acceleration function control system comprises a current protection action module, a reclosing post-acceleration module and a breaker tripping module; the post-reclosing acceleration module comprises a current protection action signal holding module, a breaker position change judging module, a post-reclosing acceleration protection action module and a post-reclosing acceleration action module;
the input end of the current protection action module is used for being connected with a current signal end, the output end of the current protection action module is simultaneously connected with the input end of the current protection action signal holding module and the input end of the acceleration protection action module after reclosing, the input end of the breaker position change judgment module is used for being connected with a breaker signal end, the input end of the acceleration action module after reclosing is simultaneously connected with the output end of the current protection action signal holding module, the output end of the acceleration protection action module after reclosing and the output end of the breaker position change judgment module, and the output end of the acceleration action module after reclosing is connected with the input end of the breaker tripping module.
Specifically, the current protection action signal holding module may include a first signal holding device and a first timer, wherein an input end of the first signal holding device is connected to an output end of the current protection action module and an output end of the first timer, respectively, and an output end of the first signal holding device is connected to an input end of the reclosure back acceleration action module.
Specifically, the circuit breaker position change judging module may include a second signal holding device, a second timer and a second switch-on position signal device, wherein an input end of the second signal holding device and an input end of the second switch-on position signal device are respectively used for connecting a signal end of the circuit breaker, an output end of the second timer is connected with an input end of the second signal holding device, and an output end of the second signal holding device and an output end of the second switch-on position signal device are simultaneously connected with an input end of the post-reclosing acceleration action module.
Further, the first timer and the second timer may 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 can be composed 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 utility model has the advantages that: the utility model provides a pair of function control system accelerates after circuit reclosing, current protection actuating signal that accessible circuit fault arouses, protection actuating signal and circuit breaker accelerate behind the reclosing are by separating to close the reliable action judgement that protects with higher speed behind the action condition realizes the reclosing jointly, effectively avoid behind the reclosing with higher speed the protection when circuit power transmission mistake move probably and cause circuit non-fault tripping operation, equipment to have a power failure. Moreover, the utility model discloses the equipment cost of implementing is lower, can extensively be applicable to the circuit computer protection field.
Drawings
Fig. 1 is a logic of an accelerated protection action after a conventional reclosure.
Fig. 2 is a schematic block diagram of the post-line reclosing acceleration function control system according to the embodiment.
Fig. 3 is a schematic diagram of an embodiment of a circuit breaker trip module configuration.
Numbering in the figures: 100 is a current protection operation signal holding module, and 200 is a circuit breaker position change judging module.
Detailed Description
In order to solve the problems that the post-reclosing acceleration protection action condition in the existing post-reclosing acceleration function control system for the line is single and the post-reclosing acceleration protection malfunction tripping operation is easy to occur during power transmission of the line, the embodiment provides a post-reclosing acceleration function control system for the line, which specifically comprises a current signal end, a circuit breaker signal end, a current protection action module, a post-reclosing acceleration module and a circuit breaker tripping module as shown in fig. 2; the post-reclosing acceleration module comprises a current protection action signal holding module 100, a breaker position change judgment module 200, a post-reclosing acceleration protection action module and a post-reclosing acceleration action module;
the input of current protection action module is connected the current signal end, the input of current protection action signal keeping module 100, the input of protection action module with higher speed after reclosing are connected simultaneously to the output of current protection action module, the input of circuit breaker position change judgement module 200 is connected the circuit breaker signal end, the output of current protection action signal keeping module 100, the output of protection action module with higher speed after reclosing, the output of circuit breaker position change judgement module 200 are connected simultaneously to the input of action module with higher speed after reclosing, the input of circuit breaker tripping module is connected to the output of action module with higher speed after reclosing.
In an embodiment, the current protection action signal holding module 100 includes a first signal holding device and a first timer, an input end of the first signal holding device is connected to an output end of the current protection action module and an output end of the first timer, respectively, and an output end of the first signal holding device is connected to an input end of the acceleration action module after reclosing.
In an embodiment, the circuit breaker position change determining module 200 includes a second signal holding device, a second timer, and a second switch-on position signal device, where an input end of the second signal holding device and an input end of the second switch-on position signal device are respectively used for connecting signal ends of a circuit breaker, an output end of the second timer is connected to an input end of the second signal holding device, and an output end of the second signal holding device and an output end of the second switch-on position signal device are simultaneously connected to an input end of the acceleration action module after reclosing. The switching-on position signal device is a switching-off and switching-on position signal of the circuit breaker in fig. 1. Circuit breakers generally provide passive position contacts, which are divided into: normally closed contacts (the contacts are closed when the circuit breaker is in a brake separating position, and the contacts are opened when the circuit breaker is in a brake closing position) and normally open contacts (the contacts are opposite to the normally closed contacts, and are opened when the circuit breaker is in the brake separating position, and are closed when the circuit breaker is in the brake closing position), a switching value input point of a microcomputer protection device is connected into the contacts at the circuit breaker position to realize the judgment of the protection device on the circuit breaker position, wherein 1 normally open or normally closed contact is selected for some devices, and 1 normally open and 1 normally closed are selected for some devices (the double-point judgment is more accurate, and the signal error caused; and the judgment of the protection device is realized by a relay inside the protection device.
As shown in fig. 3, the circuit breaker trip 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 is connected with the circuit breaker trip coil in series to protect the circuit.
In an embodiment, the first timer and the second timer 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 current protection action module is a current protection relay, and the adjustment range of the current protection action module is generally 0 ms-10000 ms.
Based on the above hardware system, after the embodiment loads the logic program, one possible working principle is as follows:
when a line is in fault, a current signal enters a current protection action module from a current signal end, and an action signal output by the current protection action module enters a signal holding device and is output by a timer to realize a condition 1 of accelerating action after reclosing within a set time;
the current protection action module outputs an action signal to enter a post-reclosing acceleration protection action module, and the post-reclosing acceleration protection action module outputs a condition 2 for realizing post-reclosing acceleration action;
a breaker opening signal at a breaker signal end enters a signal holding device 2 (or a breaker closing signal enters the signal holding device 2, and then the signal holding device 2 outputs the inverted signal through logic editing) and is output by a timer 2 to realize a condition 3 of accelerating action after reclosing within a set time;
a breaker closing signal at a breaker signal end enters a closing position signal device (or a breaker opening signal enters the closing position signal device and then is output by the closing position signal device after being inverted through logic editing) without delay output, so that a condition 4 of accelerating action after reclosing within a set time is realized;
the signals of the condition 1, the condition 2, the condition 3 and the condition 4 enter the post-reclosing acceleration action module, so that the post-reclosing acceleration action module acts to output signals to the breaker tripping module to complete tripping of the breaker only when the condition 1, the condition 2, the condition 3 and the condition 4 are all met, and the problem of the post-reclosing acceleration protection misoperation caused by single acceleration protection action condition after reclosing is avoided.
In summary, according to the system for controlling the acceleration function after the line reclosing provided by the embodiment, the reliable action judgment of the acceleration protection after the reclosing is realized through the current protection action signal caused by the line fault, the acceleration protection action signal after the reclosing and the breaker switching-on action condition, so that the possibility of misoperation of the acceleration protection after the reclosing during line power transmission, which causes line non-fault tripping and equipment power failure, can be effectively avoided. The cost of the implemented equipment is low, and the equipment can be widely applied to the field of line microcomputer protection only with about 10 yuan of wire material cost.
Claims (6)
1. The post-reclosing acceleration function control system for the line is characterized by comprising a current protection action module, a post-reclosing acceleration module and a breaker tripping module; the post-reclosing acceleration module comprises a current protection action signal holding module, a breaker position change judging module, a post-reclosing acceleration protection action module and a post-reclosing acceleration action module;
the input of current protection action module is used for connecting the current signal end, the input of current protection action signal retaining module, the input of protection action module with higher speed after reclosing are connected simultaneously to the output of current protection action module, the input of circuit breaker position change judgement module is used for connecting the circuit breaker signal end, the output of current protection action signal retaining module, the output of protection action module with higher speed after reclosing, the output of circuit breaker position change judgement module are connected simultaneously to the input of action module with higher speed after reclosing, the input of circuit breaker tripping operation module is connected to the output of action module with higher speed after reclosing.
2. The system according to claim 1, wherein the current protection operation signal holding module comprises a first signal holding device and a first timer, wherein an input terminal of the first signal holding device is connected to an output terminal of the current protection operation module and an output terminal of the first timer, respectively, and an output terminal of the first signal holding device is connected to an input terminal of the reclosing acceleration operation module.
3. The system according to claim 2, wherein the circuit breaker position change determining module comprises a second signal holding device, a second timer and a second switch-on position signaling device, wherein an input terminal of the second signal holding device and an input terminal of the second switch-on position signaling device are respectively connected to a signal terminal of the circuit breaker, an output terminal of the second timer is connected to an input terminal of the second signal holding device, and an output terminal of the second signal holding device and an output terminal of the second switch-on position signaling device are simultaneously connected to an input terminal of the post-reclosing acceleration operation module.
4. The system of claim 3, wherein the first timer and the second timer are settable time relays.
5. The system of claim 1, wherein the current protection action module is a current protection relay.
6. The system of claim 1, wherein the circuit breaker trip module comprises 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278624.4U CN210016268U (en) | 2019-08-08 | 2019-08-08 | Acceleration function control system after circuit reclosing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921278624.4U CN210016268U (en) | 2019-08-08 | 2019-08-08 | Acceleration function control system after circuit reclosing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210016268U true CN210016268U (en) | 2020-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921278624.4U Active CN210016268U (en) | 2019-08-08 | 2019-08-08 | Acceleration function control system after circuit reclosing |
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|---|---|
| CN (1) | CN210016268U (en) |
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2019
- 2019-08-08 CN CN201921278624.4U patent/CN210016268U/en active Active
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