CN112653091A - Circuit breaker locking control circuit - Google Patents
Circuit breaker locking control circuit Download PDFInfo
- Publication number
- CN112653091A CN112653091A CN202011476705.2A CN202011476705A CN112653091A CN 112653091 A CN112653091 A CN 112653091A CN 202011476705 A CN202011476705 A CN 202011476705A CN 112653091 A CN112653091 A CN 112653091A
- Authority
- CN
- China
- Prior art keywords
- low
- operation control
- circuit breaker
- locking
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000903 blocking effect Effects 0.000 abstract 2
- 101001070790 Homo sapiens Platelet glycoprotein Ib alpha chain Proteins 0.000 description 5
- 102100034173 Platelet glycoprotein Ib alpha chain Human genes 0.000 description 5
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal fluid pressure, liquid level or liquid displacement, e.g. Buchholz relays
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—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 for distribution gear, e.g. bus-bar systems; for switching devices for switches
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a circuit breaker locking control loop, and belongs to the technical field of circuit breaker control. The low oil pressure switch contact and the low air pressure switch contact in the circuit breaker locking control circuit both adopt normally closed points, when low oil pressure or low air pressure occurs, the contact state is converted from the closed point to an open point, at the moment, the corresponding locking relay is de-energized, the normally open contact of the locking relay connected in the operation control circuit in series is opened, the corresponding circuit breaker operation control circuit is disconnected, and the circuit breaker operation is locked. Therefore, when the locking loop is in virtual connection and disconnection, the locking relay loses power, and the circuit breaker is locked; when a blocking relay element failure occurs, etc., the blocking relay contacts are opened and the circuit breaker operation is blocked. The circuit can effectively solve the problem that the operation control circuit cannot be effectively locked under the conditions of circuit disconnection, damage of a locking relay and the like, greatly improves the reliability of the circuit breaker, and improves the operation safety of a power grid.
Description
Technical Field
The invention relates to a circuit breaker locking control loop, and belongs to the technical field of circuit breaker control.
Background
The low oil pressure, low air pressure and other locking circuits in the circuit breaker control circuit are used as necessary circuits for realizing safe and reliable operation of the circuit breaker, and the circuit breaker operation circuit has a complete functional circuit at present. The low oil pressure switch contact and the low air pressure switch contact adopted by the current breaker control circuit are both normally open points, as shown in fig. 1, PSYA, PSYB and PSYC are A, B and C-phase low oil pressure switch contacts respectively, PSYA, PSYB and PSYC are normally open points, GP1A, GP1B and GP1C are A, B and C-phase low air pressure switch contacts respectively, GP1A, GP1B and GP1C are normally open points, when low oil pressure or low air pressure occurs in any phase, the contact state of the corresponding phase is converted from an open point to a closed point, at the moment, a corresponding closing low oil pressure latching relay (K5) or low air pressure latching relay (K6) is electrified, the latching relay is connected in the operation control circuit in series, the normally closed contact is opened, at the moment, the breaker operation control circuit is opened, and the breaker operation is latched. Although the control circuit can realize the locking of the circuit breaker operation control circuit when low oil pressure and low air pressure occur, when the locking relay is in fault or the locking circuit is broken, the locking relay cannot be electrified, so that the locking of the operation control circuit cannot be realized, and the phenomenon of mistaken opening and closing of a circuit breaker body due to the locking failure of the circuit breaker control circuit occurs, thereby influencing the safe and reliable operation of a power grid and even the operation safety of the power grid.
Disclosure of Invention
The invention aims to provide a circuit breaker locking control loop to solve the problem that the existing circuit breaker operation control loop is low in reliability.
The present invention provides a circuit breaker lockout control circuit for solving the above technical problems, the lockout control circuit comprising:
the locking loop comprises a closing low-oil-pressure locking branch, a low-air-pressure locking branch and/or a main (auxiliary) opening low-oil-pressure locking branch, each branch comprises a switch contact and a locking relay which are correspondingly connected in series, and each switch contact adopts a normally closed point;
the operation control loop comprises a closing operation control loop and a separating operation control loop, and the closing operation control loop and the separating operation control loop are respectively connected with a normally open point of a corresponding latching relay in series.
The low oil pressure switch contact and the low air pressure switch contact both adopt normally closed points, when low oil pressure or low air pressure occurs, the contact state is converted from the closed point to an open point, at the moment, the corresponding latching relay is de-energized, the normally open contact of the latching relay connected in the operation control loop in series is opened, at the moment, the circuit breaker operation control loop is disconnected, and the circuit breaker operation is locked. Therefore, when the locking circuit is in virtual connection and disconnection, the locking relay loses power, the circuit breaker operation control circuit is disconnected, and the circuit breaker operation is locked; when the conditions such as the fault of the latching relay element occur, the contact of the latching relay is opened, the circuit breaker operation control circuit is disconnected, and the circuit breaker operation is latched. The circuit can effectively solve the problem that the operation control circuit cannot be effectively locked under the conditions of circuit disconnection, damage of a locking relay and the like, greatly improves the reliability of the circuit breaker, and improves the operation safety of a power grid.
Furthermore, the switching-on low-oil-pressure locking branch comprises switching-on low-oil-pressure switch contacts and switching-on low-oil-pressure locking relays which are connected in series at two ends of the power supply, when the A, B and the C-phase oil pressure are normal, the switching-on low-oil-pressure switch contacts of each phase are in a normally closed state, and normally open contacts of the switching-on low-oil-pressure locking relays are connected in series in the switching-on operation control loop.
Furthermore, the main (auxiliary) separating brake low oil pressure locking branch comprises separating brake low oil pressure switch contacts and separating brake low oil pressure locking relays which are connected in series at two ends of the power supply, when the A, B and the C-phase oil pressure are normal, the separating brake low oil pressure switch contacts of each phase are in a normally closed state, and the normally open contacts of the separating brake low oil pressure locking relays are connected in series in the separating brake operation control loop.
Furthermore, the low-pressure locking branch comprises a low-pressure switch contact and a low-pressure locking relay which are connected in series at two ends of the power supply, when A, B and the C-phase pressure are normal, the low-pressure switch contact of each phase is in a normally closed state, and a normally open contact of the low-pressure locking relay is connected in series in the switching-on operation control loop and the switching-off operation control loop.
Furthermore, the closing operation control loop comprises A, B and a C closing operation control branch, and the opening operation control loop comprises A, B and a C opening operation control branch.
Furthermore, in order to better improve the reliability of the circuit breaker, each phase switching-on operation control branch is also connected in series with a normally closed contact of an auxiliary switch of a corresponding phase, a normally closed contact of an anti-tripping relay and a switching-on coil.
Drawings
Fig. 1 is a circuit schematic of a prior art circuit breaker lockout control circuit;
fig. 2 is a schematic circuit diagram of the circuit breaker lockout control circuit of the present invention;
FIG. 3 is a schematic view of the contact state of the density meter of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The invention provides a novel circuit breaker locking control circuit aiming at the problems that the reliability of the existing circuit breaker locking control circuit is low, the circuit breaker can not be effectively locked for opening and closing operation under the conditions of circuit disconnection, element (locking relay) damage and the like, the structure and the function of a low-oil pressure and low-air pressure switch in the existing circuit breaker operation locking circuit are adjusted, and when the oil pressure of a hydraulic mechanism is low, a contact for reflecting low-oil pressure locking is closed; the contact state of the gas chamber density meter is improved, and when the gas chamber density meter is in a low-pressure state, the contact for locking the circuit breaker control loop is closed. Because the hydraulic switch selected by the hydraulic state contact is a C-type contact (has two states of normally open and normally closed), the grounding of the hydraulic switch does not need to be changed, and the correspondence between the pressure contact and the functional state of the density meter is realized by changing the contact state of the density meter, as shown in fig. 3.
The specific circuit breaker locking control circuit is shown in fig. 2, and comprises two parts, one part is an operation control circuit, and the other part is a locking circuit, wherein the locking circuit comprises a closing low-oil-pressure locking branch, a low-air-pressure locking branch and a main (auxiliary) opening low-oil-pressure locking branch, the closing low-oil-pressure locking branch comprises closing low-oil-pressure switch contacts and a closing low-oil-pressure locking relay K5 which are connected in series at two ends of a power supply, KP3A, KP3B and KP3C are A, B and C-phase closing low-oil-pressure switch contacts, KP3A, KP3B and KP3C are normally closed points, that is, when A, B and C-phase oil pressure are normal, KP3A, KP3B and KP3C are normally closed. When low oil pressure occurs to any phase of oil pressure, the normally closed point of the corresponding phase is disconnected, so that the closing low oil pressure locking branch is disconnected, the closing low oil pressure locking relay K5 loses power, the normally open contact of the closing low oil pressure locking relay K5 connected in series in the closing operation control circuit is opened, the closing operation control circuit of the circuit breaker is disconnected at the moment, the closing operation of the circuit breaker is locked, and closing low oil pressure locking is realized.
Similarly, the main (auxiliary) opening low oil pressure locking branch comprises opening low oil pressure switch contacts and opening low oil pressure locking relays of each phase, which are connected in series with two ends of the power supply, KP1A, KP1B and KP1C are respectively A, B and C-phase opening low oil pressure switch contacts, KP1A, KP1B and KP1C are normally closed points, that is, KP3A, KP3B and KP3C are normally closed when A, B and C-phase oil pressure are normal. When low oil pressure occurs to any phase of oil pressure, the normally closed point of the corresponding phase is disconnected, so that the switching-off low oil pressure locking branch is disconnected, the switching-off low oil pressure locking relay loses power, the normally open contact of the switching-off low oil pressure locking relay connected in series in the switching-off operation control loop is opened (only the control loop of the switching-on operation is given in the figure 2, the switching-off operation control loop is similar), at the moment, the switching-off operation control loop of the circuit breaker is disconnected, the switching-off operation of the circuit breaker is locked, and the switching-off low oil pressure locking is realized.
As shown in fig. 2, the low-pressure locking branch comprises low-pressure switch contacts of each phase and a low-pressure locking relay K6 connected in series at two ends of a power supply, GP1A, GP1B and GP1C are A, B and C-phase low-pressure switch contacts respectively, GP1A, GP1B and GP1C are normally closed points, that is, GP1A, GP1B and GP1C are normally closed when A, B and C-phase air pressure are normal. When low air pressure occurs to any phase of air pressure, the normally closed point of the corresponding phase is disconnected, so that the low air pressure locking branch is disconnected, the low air pressure locking relay K6 loses power, the normally open contact of the low air pressure locking relay K6 connected in series in the opening/closing operation control loop is opened, the opening/closing operation control loop of the circuit breaker is disconnected at the moment, the opening/closing operation of the circuit breaker is locked, and the opening/closing low air pressure locking is realized.
The operation control loop comprises a switching-off operation control loop and a switching-on operation control loop, wherein the switching-on operation control loop is shown as the right half part of fig. 2, each phase A, B and C is provided with a corresponding switching-on operation control branch, for example, the phase A is connected with a normally closed contact of an auxiliary switch QF1A of the phase A, a normally closed contact of an anti-tripping relay KFA of the phase A, an A phase switching-on coil YC1A, a normally open contact of a switching-on low-oil-pressure latching relay K5, a normally open contact of a low-air-pressure latching relay K6 and the like in series, meanwhile, the branch is also provided with a normally open contact of a near-control (local) switching-on operation relay K1, a coil of a near-control switching-on operation relay K1 is connected in series with the near-control switching-on loop, a near-control switching-on switch SM0 is a manual button switch, and when the near-control SM switch 0 is pressed.
The low oil pressure switch contact and the low air pressure switch contact which are adopted by the circuit breaker locking control circuit are normally closed points, when low oil pressure or low air pressure occurs, the contact state is converted from the closed point to the open point, the corresponding locking relay is de-energized at the moment, the normally open contact of the locking relay which is connected into the operation control circuit in series is opened, the circuit breaker operation control circuit is disconnected at the moment, and the circuit breaker is locked in operation. When the closed loop is in virtual connection or circuit disconnection, the closed relay loses power, the circuit breaker operation control loop is disconnected, and the circuit breaker operation is closed; when the conditions such as the fault of the latching relay element occur, the contact of the latching relay is opened, the circuit breaker operation control circuit is disconnected, and the circuit breaker operation is latched. The circuit can effectively solve the problem that the operation control circuit cannot be effectively locked under the conditions of circuit disconnection, damage of a locking relay and the like, greatly improves the reliability of the circuit breaker, and improves the operation safety of a power grid.
Claims (6)
1. A circuit breaker lockout control circuit, comprising:
the locking loop comprises a closing low-oil-pressure locking branch, a low-air-pressure locking branch and/or a main (auxiliary) opening low-oil-pressure locking branch, each branch comprises a switch contact and a locking relay which are correspondingly connected in series, and each switch contact adopts a normally closed point;
the operation control loop comprises a closing operation control loop and a separating operation control loop, and the closing operation control loop and the separating operation control loop are respectively connected with a normally open point of a corresponding latching relay in series.
2. The circuit breaker lockout control circuit of claim 1, wherein the closing low oil pressure lockout branch comprises a closing low oil pressure switch contact and a closing low oil pressure lockout relay of each phase connected in series across the power supply, wherein when A, B and the C-phase oil pressure are normal, the closing low oil pressure switch contact of each phase is normally closed, and the normally open contact of the closing low oil pressure lockout relay is connected in series in the closing operation control circuit.
3. The circuit breaker lockout control circuit of claim 1, wherein the primary (secondary) opening low oil pressure lockout branch comprises a respective phase opening low oil pressure switch contact and a opening low oil pressure lockout relay connected in series across the power supply, wherein when A, B and the C-phase oil pressure are normal, the respective phase opening low oil pressure switch contact is normally closed, and the normally open contact of the opening low oil pressure lockout relay is connected in series in the opening operation control circuit.
4. The circuit breaker lockout control circuit of claim 1, wherein the low pressure lockout branch comprises a low pressure switch contact and a low pressure lockout relay of each phase connected in series across the power source, wherein when A, B and the C-phase pressure are normal, the low pressure switch contact of each phase is normally closed, and the normally open contact of the low pressure lockout relay is connected in series in the closing operation control circuit and the opening operation control circuit.
5. The circuit breaker lockout control circuit of any of claims 1-4, wherein the closing operation control circuit comprises A, B and a C closing operation control branch, and the opening operation control circuit comprises A, B and a C opening operation control branch.
6. The circuit breaker lockout control circuit of claim 5, wherein each phase closing operation control branch is further connected in series with the normally closed contact of the auxiliary switch, the normally closed contact of the anti-trip relay, and the closing coil of the corresponding phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476705.2A CN112653091B (en) | 2020-12-14 | 2020-12-14 | Locking control loop of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011476705.2A CN112653091B (en) | 2020-12-14 | 2020-12-14 | Locking control loop of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112653091A true CN112653091A (en) | 2021-04-13 |
| CN112653091B CN112653091B (en) | 2024-03-22 |
Family
ID=75354802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011476705.2A Active CN112653091B (en) | 2020-12-14 | 2020-12-14 | Locking control loop of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112653091B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020012210A1 (en) * | 1999-12-29 | 2002-01-31 | Morris Robert A. | Circuit breaker incorporating fault lockout protection |
| CN201629258U (en) * | 2010-07-16 | 2010-11-10 | 河南省电力公司漯河供电公司 | Low SF6 gas pressure blocking control loop of high-voltage circuit breaker |
| CN201629259U (en) * | 2009-10-28 | 2010-11-10 | 平高集团有限公司 | Geographic information system (GIS) |
| CN203225514U (en) * | 2013-05-10 | 2013-10-02 | 济宁矿业集团有限公司 | 220kV breaker circuit capable of preventing burnout of closing coils |
| CN203813514U (en) * | 2013-07-22 | 2014-09-03 | 国家电网公司 | Control loop for high-voltage circuit breaker |
| CN203850926U (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | Modular intelligent operating loop of high-voltage breaker |
| CN204886117U (en) * | 2015-06-16 | 2015-12-16 | 重庆新世杰电气股份有限公司 | Operation circuit of circuit breaker |
| CN105356585A (en) * | 2015-11-25 | 2016-02-24 | 国网河南新密市供电公司 | Breaker closing and blocking loop |
| CN205882845U (en) * | 2016-05-05 | 2017-01-11 | 江苏省镇江船厂（集团）有限公司 | Boats and ships looped netowrk distribution system locking protection circuit |
| CN107994575A (en) * | 2017-12-23 | 2018-05-04 | 中国西电电气股份有限公司 | A kind of high-voltage circuitbreaker secondary circuit |
-
2020
- 2020-12-14 CN CN202011476705.2A patent/CN112653091B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020012210A1 (en) * | 1999-12-29 | 2002-01-31 | Morris Robert A. | Circuit breaker incorporating fault lockout protection |
| CN201629259U (en) * | 2009-10-28 | 2010-11-10 | 平高集团有限公司 | Geographic information system (GIS) |
| CN201629258U (en) * | 2010-07-16 | 2010-11-10 | 河南省电力公司漯河供电公司 | Low SF6 gas pressure blocking control loop of high-voltage circuit breaker |
| CN203225514U (en) * | 2013-05-10 | 2013-10-02 | 济宁矿业集团有限公司 | 220kV breaker circuit capable of preventing burnout of closing coils |
| CN203813514U (en) * | 2013-07-22 | 2014-09-03 | 国家电网公司 | Control loop for high-voltage circuit breaker |
| CN203850926U (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | Modular intelligent operating loop of high-voltage breaker |
| CN204886117U (en) * | 2015-06-16 | 2015-12-16 | 重庆新世杰电气股份有限公司 | Operation circuit of circuit breaker |
| CN105356585A (en) * | 2015-11-25 | 2016-02-24 | 国网河南新密市供电公司 | Breaker closing and blocking loop |
| CN205882845U (en) * | 2016-05-05 | 2017-01-11 | 江苏省镇江船厂（集团）有限公司 | Boats and ships looped netowrk distribution system locking protection circuit |
| CN107994575A (en) * | 2017-12-23 | 2018-05-04 | 中国西电电气股份有限公司 | A kind of high-voltage circuitbreaker secondary circuit |
Non-Patent Citations (1)
| Title |
|---|
| 骆树权;: "断路器SF6压力低闭锁回路的问题与优化建议", 企业技术开发, no. 05 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112653091B (en) | 2024-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101127444A (en) | Intelligent operation/cutting method for power grid capacitor unit | |
| CN103647255A (en) | Improved FC switch control loop | |
| CN112865283B (en) | Spare power automatic switching device and method for internal bridge connection type transformer substation | |
| CN108022814A (en) | A kind of miniature circuit breaker arc quenching system | |
| CN112653091A (en) | Circuit breaker locking control circuit | |
| CN209642333U (en) | A kind of breaker body unbalanced three-phase lines protection circuit | |
| CN203660508U (en) | Improved FC switch control circuit | |
| CN202190004U (en) | Low voltage power distribution cabinet control circuit | |
| CN110086183A (en) | A kind of breaker body unbalanced three-phase lines protection circuit | |
| CN205723317U (en) | A kind of SF preventing Burnout of Closing Coil6spring mechanism of circuit breaker shutting-brake control loop | |
| CN211017992U (en) | Multiport direct current breaker maintenance system that does not have a power failure | |
| CN212615376U (en) | Locking control system for air compressor | |
| CN205656998U (en) | Modular intelligent control isolator | |
| CN208127882U (en) | One kind being used for Public residence switchgear house dual power supply available power operation control system | |
| CN105761975A (en) | Breaker operation device with misoperation preventing function | |
| CN206595903U (en) | A kind of converter plant for water circulating pump | |
| CN217335191U (en) | Box transformer based on UPS | |
| CN218005864U (en) | Inconsistent protection circuit of circuit breaker body three-phase | |
| CN213366510U (en) | Rotary circuit breaker structure of environment-friendly voltage cabinet | |
| CN220043053U (en) | High-temperature reactor bus power switch locking structure and high-temperature gas cooled reactor system thereof | |
| CN217326830U (en) | Transformer door control system and power supply and distribution system with same | |
| CN112086867B (en) | 500kV typical series loop HGIS electrical interlocking control loop | |
| CN220367830U (en) | Circuit breaker | |
| CN218678427U (en) | Generator de-excitation loop | |
| CN220234504U (en) | Novel control circuit for controlling start and stop of high-voltage motor by single contact |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |