CN111756024B - Circuit breaker control circuit - Google Patents
Circuit breaker control circuit Download PDFInfo
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- CN111756024B CN111756024B CN202010526801.7A CN202010526801A CN111756024B CN 111756024 B CN111756024 B CN 111756024B CN 202010526801 A CN202010526801 A CN 202010526801A CN 111756024 B CN111756024 B CN 111756024B
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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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a circuit breaker control loop, which comprises a closing loop, an opening loop and a monitoring part, wherein the closing loop is connected with the monitoring part; the monitoring part comprises a coil of a jumping position monitoring relay TWJ, a coil of a closing coil monitoring relay HQJ, a coil of a closing position monitoring relay HWJ and a coil of a tripping coil monitoring relay TQJ; one end of a coil of the TWJ is connected to the positive electrode of the control power supply, and the other end of the coil of the TWJ is connected between a normally-closed auxiliary contact DL of a closing loop switch and a coil of the HBJ; one end of a coil HQJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally closed auxiliary contact DL and a closing coil HQ of the closing loop switch; one end of a coil HWJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-open auxiliary contact DL of the separating brake loop switch and a coil of a tripping holding relay TBJ; one end of the coil of the TQJ is connected with the positive electrode of the control power supply, and the other end of the coil of the TQJ is connected between the normally-open auxiliary contact DL of the separating brake loop switch and the coil of the tripping relay TQ. The invention can improve the reliability of the control loop.
Description
Technical Field
The invention relates to the technical field of circuit breaker control, in particular to a circuit breaker control loop.
Background
The secondary circuit in the transformer substation mainly comprises a current-voltage circuit, a control circuit, a signal circuit, a direct current circuit and the like, wherein the control circuit is used as an important component in the secondary circuit and has the function of controlling the on-off of a circuit breaker and an isolating switch in the transformer substation, and the state of the circuit is directly related to the normal operation of the transformer substation, so that the integrity monitoring of the control circuit is particularly important. The integrity of a control loop of a current transformer substation is mainly monitored by a loop formed by connecting a normally closed node controlled by a tripping position monitoring relay in a closing loop and a normally closed node controlled by the switching position monitoring relay in the tripping loop in series.
The integrity monitoring of the circuit breaker control circuit of the present substation has the following technical problems:
firstly, when the switch is in the on position, the tripping circuit has no fault, but a closing coil in the closing circuit is burnt out; and secondly, when the switch is in the open position, the closing loop has no fault, but a tripping coil in the tripping loop is burnt out, and the two defects can not be found in time according to the principle of controlling the circuit to be broken, so that a plurality of hidden dangers are buried in the safe and stable operation of the transformer substation.
Disclosure of Invention
The present invention is directed to a circuit breaker control circuit, so as to solve the above technical problems of the existing transformer substation circuit breaker control circuit integrity monitoring.
In order to achieve the above object, an embodiment of the present invention provides a circuit breaker control circuit, which includes a closing circuit, an opening circuit, a tripping circuit, a closing circuit, and a monitoring portion;
the monitoring part comprises a coil of a jumping position monitoring relay TWJ, a coil of a closing coil monitoring relay HQJ, a coil of a closing position monitoring relay HWJ and a coil of a tripping coil monitoring relay TQJ;
one end of a coil of the jump position monitoring relay TWJ is connected to the positive electrode of the control power supply, and the other end of the coil of the jump position monitoring relay TWJ is connected between a normally closed auxiliary contact DL of a closing loop switch and a coil of a closing holding relay HBJ;
one end of a coil of the closing coil monitoring relay HQJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-closed auxiliary contact DL and a closing coil HQ of the closing loop switch;
one end of a coil of the on-position monitoring relay HWJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-open auxiliary contact DL of the opening circuit switch and a coil of the tripping holding relay TBJ;
and one end of the coil of the tripping coil monitoring relay TQJ is connected with the anode of the control power supply, and the other end of the coil of the tripping coil monitoring relay TQJ is connected between the normally-open auxiliary contact DL of the opening circuit switch and the coil of the tripping relay TQ.
Preferably, the switching-on loop comprises a positive electrode of a control power supply, a normally open auxiliary contact of a switching-on holding relay HBJ, a normally closed auxiliary contact of a voltage type anti-tripping locking relay TBJV, a coil of the switching-on holding relay HBJ, a normally closed auxiliary contact DL of a switch, a switching-on coil HQ and a negative electrode of the control power supply, which are connected in sequence, and the normally open auxiliary contact of the switching-on holding relay HBJ is connected in parallel with the normally open auxiliary contact of the switching-on relay HJ.
Preferably, the opening circuit comprises a control power supply positive electrode, a normally open auxiliary contact of a tripping holding relay TBJ, a coil of a tripping holding relay TBJ, a switch normally closed auxiliary contact DL, an opening coil TQ and a control power supply negative electrode which are connected in sequence, and the normally open auxiliary contact of the tripping holding relay TBJ is connected with a normally open point of a tripping relay TJ in parallel.
Preferably, the hand-closing loop is connected with one end of a coil of the voltage type anti-tripping latching relay TBJV, the other end of the coil of the voltage type anti-tripping latching relay TBJV is sequentially connected with a normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV and a negative electrode of a control power supply, and the normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV is connected with a normally-open auxiliary contact of a tripping holding relay TBJ in parallel.
The above embodiment scheme has the following beneficial effects:
firstly, the state of tripping operation coil and closing coil is always in the state of being monitored, can effectively prevent to take place because of the unsuccessful circumstances of reclosing that the closing coil burns out and leads to, has strengthened the reliability of relay protection device action.
And secondly, the original tripping loop is not changed, only the monitoring relay is added in front of the tripping coil and the closing coil, compared with other improved methods, the workload of the loop part is reduced, the parasitic risk is reduced, if the parameter of the monitoring relay is properly selected, the service life of the tripping and closing coil cannot be influenced even if the monitoring relay is electrified for a long time, and the condition is the same as that a switch is in the closed position for a long time, and HWJ in the tripping loop is in the excitation state for a long time.
And thirdly, according to the fault signal of the monitoring background, the fault position can be accurately judged, for example, the switch is in the closed position, the background reports two abnormal signals of the disconnection of the control loop and the fault of the switching-on coil, the switching-on coil can be quickly judged to be burnt out and the normally-open contact of the switch of the tripping loop is damaged, and the defect searching time is effectively reduced. Therefore, the safety and stability of the operation of the power grid are enhanced, the reliability of the relay protection action is improved, and the time for searching the fault of the control circuit is shortened.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a circuit diagram of a circuit breaker control circuit according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
In addition, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known means have not been described in detail so as not to obscure the present invention.
As shown in fig. 1, + KM is a positive control power supply, and, -KM is a negative control power supply, TWJ is a jump position monitoring relay, HWJ is a close position monitoring relay, DL represents a switch position contact, KKJ is a close subsequent electrical appliance, HBJ is a close holding relay, TBJ is a trip holding relay, TQJ is a trip coil monitoring relay, HQJ is a close coil monitoring relay, TBJV is a voltage type anti-trip blocking relay, TQ is a trip coil, and HQ is a close coil. The rectangular frame represents a relay, and the other represents an auxiliary contact.
Specifically, the circuit breaker control circuit of the embodiment includes a closing circuit, an opening circuit, a hand tripping circuit, a hand closing circuit and a monitoring part;
the switching-on circuit comprises a control power supply positive electrode, a normally-open auxiliary contact of a switching-on holding relay HBJ, a normally-closed auxiliary contact of a voltage type anti-tripping latching relay TBJV, a coil of the switching-on holding relay HBJ, a normally-closed auxiliary contact DL of a switch, a switching-on coil HQ and a control power supply negative electrode which are connected in sequence, wherein the normally-open auxiliary contact of the switching-on holding relay HBJ is connected with the normally-open auxiliary contact of the switching-on relay HJ in parallel.
The opening circuit comprises a control power supply anode, a normally open auxiliary contact of a tripping holding relay TBJ, a coil of a tripping holding relay TBJ, a switch normally closed auxiliary contact DL, an opening coil TQ and a control power supply cathode which are sequentially connected, and the normally open auxiliary contact of the tripping holding relay TBJ is connected with the normally open point of a tripping relay TJ in parallel.
The manual loop is connected with one end of a coil of the voltage type anti-tripping latching relay TBJV, the other end of the coil of the voltage type anti-tripping latching relay TBJV is sequentially connected with a normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV and a control power supply cathode, and the normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV is connected with a normally-open auxiliary contact of a tripping holding relay TBJ in parallel;
wherein, the monitoring part comprises a coil of a jumping position monitoring relay TWJ, a coil of a closing coil monitoring relay HQJ, a coil of a closing position monitoring relay HWJ and a coil of a tripping coil monitoring relay TQJ;
one end of a coil of the jump position monitoring relay TWJ is connected to the positive electrode of the control power supply, and the other end of the coil of the jump position monitoring relay TWJ is connected between a normally closed auxiliary contact DL of a closing loop switch and a coil of a closing holding relay HBJ;
one end of a coil of the closing coil monitoring relay HQJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally closed auxiliary contact DL and a closing coil HQ of the closing loop switch;
one end of a coil of the on-position monitoring relay HWJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-open auxiliary contact DL of the opening circuit switch and a coil of the tripping holding relay TBJ;
and one end of the coil of the tripping coil monitoring relay TQJ is connected with the anode of the control power supply, and the other end of the coil of the tripping coil monitoring relay TQJ is connected between the normally-open auxiliary contact DL of the opening circuit switch and the coil of the tripping relay TQ.
The working principle of the circuit breaker control circuit of the embodiment is as follows:
when the switch is at the opening position, HWJ is not excited for the opening loop, if the tripping loop tripping coil is burnt out, TQJ cannot be excited, and a tripping coil fault signal is sent out, and if the tripping loop tripping coil is normal, TQJ can be excited, and a tripping coil fault signal is not sent out. For the closing loop section, there are three situations: firstly, a closing loop has no fault, the TWJ and HQJ are excited normally, and a control loop disconnection signal and a closing coil damage signal are avoided; secondly, the normally closed auxiliary contact of the switch in the closing loop is damaged, HQJ is still excited, TWJ is not excited, and only a control loop disconnection signal is sent out; and thirdly, a closing coil in a closing loop is burnt out, the TWJ and the HQJ are not excited, and signals for controlling the circuit to be broken and the closing coil to be damaged are sent out.
When the switch is at a switching-on position, TWJ is not excited for a switching-on loop, HQJ is not excited if a switching-on coil of the switching-on loop is burnt out, a switching-on coil fault signal is sent out, and HQJ is excited if the switching-on coil of the switching-on loop is normal, and a switching-on coil fault signal is not sent out. For the trip loop portion, there are also three situations: firstly, the tripping circuit has no fault, HWJ and TQJ are excited normally, and a control circuit disconnection signal and a tripping coil damage signal cannot be generated; secondly, the normally open auxiliary contact of the switch in the tripping loop is damaged, the TQJ is still excited, the HWJ is not excited, and only a control loop disconnection signal is sent; thirdly, the tripping coil in the tripping circuit is burnt out, HWJ and TQJ are not excited, and signals of control circuit disconnection and tripping coil damage are sent out.
And the monitoring background of the transformer substation receives the control circuit disconnection signal, the closing coil damage signal, the control circuit disconnection signal and the tripping coil damage signal in real time and learns the fault state of the control circuit in time.
For present substation circuit breaker control circuit, the control circuit of this embodiment has following advantage: firstly, the state of tripping operation coil and closing coil is always in the state of being monitored, can effectively prevent to take place because of the unsuccessful circumstances of reclosing that the closing coil burns out and leads to, has strengthened the reliability of relay protection device action. And secondly, the original tripping circuit is not changed, the monitoring relay is only added in front of the tripping coil and the closing coil, compared with other improved methods, the workload of the circuit part is reduced, the parasitic risk is reduced, if the parameter selection of the monitoring relay is proper, the service life of the tripping and closing coil cannot be influenced even if the monitoring relay is electrified for a long time, just as if the switch is in the closed position for a long time, HWJ in the tripping circuit is in the excitation state for a long time. And thirdly, according to the fault signal of the monitoring background, the fault position can be accurately judged, for example, the switch is in the closed position, the background reports two abnormal signals of the disconnection of the control loop and the fault of the switching-on coil, the switching-on coil can be quickly judged to be burnt out and the normally-open contact of the switch of the tripping loop is damaged, and the defect searching time is effectively reduced.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (1)
1. A circuit breaker control circuit is characterized by comprising a closing circuit, an opening circuit, a hand tripping circuit, a hand closing circuit and a monitoring part;
the monitoring part comprises a coil of a jumping position monitoring relay TWJ, a coil of a closing coil monitoring relay HQJ, a coil of a closing position monitoring relay HWJ and a coil of a tripping coil monitoring relay TQJ; one end of a coil of the jump position monitoring relay TWJ is connected to the positive electrode of the control power supply, and the other end of the coil of the jump position monitoring relay TWJ is connected between a normally closed auxiliary contact of a closing loop switch and a coil of a closing holding relay HBJ; one end of a coil of the closing coil monitoring relay HQJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-closed auxiliary contact of a closing loop switch and a closing coil HQ; one end of a coil of the on-position monitoring relay HWJ is connected to the positive electrode of the control power supply, and the other end of the coil is connected between a normally-open auxiliary contact of the opening circuit switch and a coil of the tripping holding relay TBJ; one end of the coil of the tripping coil monitoring relay TQJ is connected with the anode of the control power supply, and the other end of the coil of the tripping coil monitoring relay TQJ is connected between the normally-open auxiliary contact of the opening circuit switch and the coil of the tripping relay TQ;
the switching-on circuit comprises a control power supply positive electrode, a normally-open auxiliary contact of a switching-on holding relay HBJ, a normally-closed auxiliary contact of a voltage type anti-tripping latching relay TBJV, a coil of the switching-on holding relay HBJ, a normally-closed auxiliary contact of a switching-on circuit switch, a switching-on coil HQ and a control power supply negative electrode which are connected in sequence, wherein the normally-open auxiliary contact of the switching-on holding relay HBJ is connected with the normally-open auxiliary contact of the switching-on relay HJ in parallel;
the opening circuit comprises a control power supply anode, a normally open auxiliary contact of a tripping holding relay TBJ, a coil of a tripping holding relay TBJ, a normally open auxiliary contact of an opening circuit switch, an opening coil TQ and a control power supply cathode which are connected in sequence, and the normally open auxiliary contact of the tripping holding relay TBJ is connected with the normally open auxiliary contact of a tripping relay TJ in parallel;
the manual loop is connected with one end of a coil of the voltage type anti-tripping latching relay TBJV, the other end of the coil of the voltage type anti-tripping latching relay TBJV is sequentially connected with a normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV and a negative electrode of a control power supply, and the normally-open auxiliary contact of the voltage type anti-tripping latching relay TBJV is connected with a normally-open auxiliary contact of a tripping holding relay TBJ in parallel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010526801.7A CN111756024B (en) | 2020-06-11 | 2020-06-11 | Circuit breaker control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010526801.7A CN111756024B (en) | 2020-06-11 | 2020-06-11 | Circuit breaker control circuit |
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| CN111756024A CN111756024A (en) | 2020-10-09 |
| CN111756024B true CN111756024B (en) | 2023-03-03 |
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| CN210536277U (en) * | 2019-09-27 | 2020-05-15 | 无锡锡自电力自动化系统有限公司 | Circuit breaker control loop of microcomputer protection device |
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| US6981645B2 (en) * | 2003-09-08 | 2006-01-03 | Symbol Technologies, Inc. | Drive circuit for controlling a resonant motor |
| CN203367991U (en) * | 2013-07-15 | 2013-12-25 | 国家电网公司 | Motor temperature protection device |
| CN103606902B (en) * | 2013-11-15 | 2016-08-24 | 中山市明阳电器有限公司 | The trip-preventing circuit that a kind of chopper is combined with relay protection |
| CN203859486U (en) * | 2014-03-28 | 2014-10-01 | 北京京桥热电有限责任公司 | Switch electrical anti-tripping circuit |
| CN104009547B (en) * | 2014-06-13 | 2016-05-04 | 国家电网公司 | Breaker remote operation function monitoring arrangement and transformer station's remote operation system |
| CN104793131B (en) * | 2015-04-03 | 2017-10-13 | 国网山东省电力公司东营供电公司 | Breaker tripping coil full working scope monitoring circuit |
| CN206481046U (en) * | 2016-12-08 | 2017-09-08 | 南昌工程学院 | High-voltage circuit breaker coil protective device and protection system |
| KR101970006B1 (en) * | 2017-04-10 | 2019-04-17 | 한국전력기술 주식회사 | Apparatus and Method for preventing malfunction of Circuit Breaker in Metal-Clad and Metal enclosed Swithgear |
| CN111060803A (en) * | 2019-12-10 | 2020-04-24 | 中国长江电力股份有限公司 | Circuit breaker tripping and closing circuit full-working-condition monitoring circuit |
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2020
- 2020-06-11 CN CN202010526801.7A patent/CN111756024B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821557A (en) * | 2015-04-23 | 2015-08-05 | 中国能源建设集团江苏省电力设计院有限公司 | Control loop of breaker operation box |
| CN210536277U (en) * | 2019-09-27 | 2020-05-15 | 无锡锡自电力自动化系统有限公司 | Circuit breaker control loop of microcomputer protection device |
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