CN219873374U - Circuit breaker closing control circuit and GIS equipment electrical loop - Google Patents
Circuit breaker closing control circuit and GIS equipment electrical loop Download PDFInfo
- Publication number
- CN219873374U CN219873374U CN202223390293.8U CN202223390293U CN219873374U CN 219873374 U CN219873374 U CN 219873374U CN 202223390293 U CN202223390293 U CN 202223390293U CN 219873374 U CN219873374 U CN 219873374U
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- circuit
- circuit breaker
- closing
- switch
- gis
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- 238000000034 method Methods 0.000 claims abstract description 18
- 230000000875 corresponding effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000002596 correlated effect Effects 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 claims 2
- 230000001052 transient effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Abstract
The utility model relates to a circuit breaker closing control circuit and a GIS equipment electrical loop, and belongs to the field of high-voltage switch product control. The circuit breaker switching-on circuit comprises a circuit breaker switching-on circuit for controlling switching-on action of the circuit breaker, wherein normally closed contacts of disconnecting switch switching-off contactors and normally closed contacts of disconnecting switch switching-on contactors associated with the circuit breaker are arranged in series in the circuit breaker switching-on circuit, and the switching-on circuit of the circuit breaker corresponding to any disconnecting switch is blocked in the switching-on and switching-off operation process of any disconnecting switch. The problem that the breaker performs switching-on operation in the switching-off transient process of the isolating switch so as to damage GIS main equipment is solved.
Description
Technical Field
The utility model relates to a circuit breaker closing control circuit and a GIS equipment electrical loop, and belongs to the field of high-voltage switch product control.
Background
The GIS isolating disconnecting link is an indispensable important device for changing the system operation mode and overhauling isolation of a transformer substation, the GIS isolating disconnecting link mechanism has longer time in the opening and closing operation process compared with the opening and closing operation process of a breaker, and in the electric locking loop, the electric operation of the disconnecting link is usually locked by adopting the opening state of the breaker, namely, the isolating disconnecting link can meet the electric five-prevention operation condition only when the breaker is in the opening state, and the isolating disconnecting link is not considered in the operation process, if the breaker is in the closing operation, the electric five-prevention requirement is also not met at the moment. The circuit breaker in the misoperation interval can bring serious consequences to GIS main equipment and personal safety.
Disclosure of Invention
The utility model aims to provide a circuit for controlling the switching-on of a circuit breaker and an electrical loop of GIS equipment, which are used for solving the problem that the circuit breaker performs switching-on operation in the transient process of switching-off and switching-on of an isolating switch so as to damage GIS main equipment.
In order to achieve the above object, the present utility model provides a method comprising:
the utility model discloses a circuit breaker closing control circuit, which comprises a circuit breaker closing loop and is used for controlling the closing action of a circuit breaker, wherein the circuit breaker closing loop is internally provided with normally closed contacts of disconnecting switches and normally closed contacts of disconnecting switches closing contacts, which are related to the circuit breaker, in series, and the circuit breaker closing loop corresponding to any disconnecting switch is closed in the process of opening and closing operation of any disconnecting switch.
The beneficial effects are that: the utility model relates to a circuit breaker closing control circuit which mainly comprises a circuit breaker closing loop, wherein the circuit breaker closing loop is provided with normally closed contacts of disconnecting switch separating contactors and normally closed contacts of disconnecting switch closing contactors which are related to the circuit breaker in series, and the closing loop of the circuit breaker corresponding to the disconnecting switch is closed in the process of opening and closing operation of any disconnecting switch. By selecting the transient state process of the operation of the isolating switch as the closing condition of the locking breaker, the reliability of the closing loop of the breaker is improved on the premise of not adding redundant monitoring units, the serious consequences caused by the locking failure of the isolating switch are avoided to a greater extent, the five-prevention requirement of a transformer substation is better met, and the safe operation of a power grid is ensured.
Further, the breaker closing loop is arranged in the GIS local control cabinet, and the normally closed contacts of the disconnecting switch opening contactors and the normally closed contacts of the disconnecting switch closing contactors are connected into the GIS local control cabinet through leads.
The beneficial effects are that: the breaker closing loop is arranged in the GIS local control cabinet, the normally closed contact of the disconnecting switch opening contactor and the normally closed contact of the disconnecting switch closing contactor are connected into the GIS local control cabinet through leads, the original electric locking logic is optimized, and electric misoperation-preventive locking in the GIS operation process is further perfected.
Further, the circuit breaker closing loop comprises a closing coil.
The utility model discloses an electrical loop of GIS equipment, which comprises a disconnecting switch, a circuit breaker, a disconnecting switch opening and closing circuit and a circuit breaker closing loop, wherein a disconnecting switch is connected in series in the disconnecting switch opening and closing circuit, a closing contactor is connected in series in the disconnecting switch closing circuit, a normally closed contact of each disconnecting switch opening and closing contactor and a normally closed contact of the disconnecting switch closing contactor which are related to the circuit breaker are connected in series in the circuit breaker closing loop, and the closing loop of the circuit breaker corresponding to the disconnecting switch is closed in the opening and closing operation process of any disconnecting switch.
The beneficial effects are that: the GIS equipment electric loop comprises the isolating switch, the circuit breaker, the isolating switch opening and closing circuit and the circuit breaker closing loop, wherein the isolating switch opening and closing circuit is connected with an opening and closing contactor in series, and the circuit breaker closing loop is connected with a normally closed contact of each isolating switch opening and closing contactor and a normally closed contact of the isolating switch closing contactor in series, so that when any isolating switch performs opening and closing operation, the closing loop of the circuit breaker corresponding to the isolating switch is closed, and the transient process of the isolating switch operation is selected as the condition of closing the circuit breaker, so that the reliability of the circuit breaker closing loop is improved on the premise of not increasing redundant monitoring units, the serious consequences caused by the closing failure of the isolating switch are avoided to a greater extent, the five-prevention requirement of a transformer substation is better met, and the safe operation of a power grid is ensured.
Further, the breaker closing loop is arranged in the GIS local control cabinet, and the normally closed contacts of the disconnecting switch opening contactors and the normally closed contacts of the disconnecting switch closing contactors are connected into the GIS local control cabinet through leads.
The beneficial effects are that: the breaker closing loop is arranged in the GIS local control cabinet, the normally closed contact of the disconnecting switch opening contactor and the normally closed contact of the disconnecting switch closing contactor are connected into the GIS local control cabinet through leads, the original electric locking logic is optimized, and electric misoperation-preventive locking in the GIS operation process is further perfected.
Further, the circuit breaker closing loop comprises a closing coil.
Drawings
FIG. 1 (a) is a prior art drive motor circuit diagram;
FIG. 1 (b) is a circuit diagram of a prior art split control loop;
FIG. 2 is a prior art single line diagram of a GIS master;
FIG. 3 is a schematic diagram of GIS spacer electrical latching logic;
FIG. 4 is a logic diagram of a circuit breaker closing lockout in an embodiment of the present utility model;
fig. 5 is a diagram of a GIS circuit breaker control loop in an embodiment of the utility model.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
Circuit breaker closing control circuit embodiment:
as shown in fig. 1 (a), a conventional driving motor circuit is shown, and fig. 1 (b) shows a conventional knife switch opening and closing control circuit. When the control loop receives the opening and closing command, the opening or closing contactor coil is electrified to form a self-holding loop and drive the motor, so that the motor starts to start, after the motor starts, the isolating switch is opened and closed to reach a preset position, the contact state of the auxiliary switch is correspondingly converted, and a cam on the mechanism connecting rod is transmitted in place and presses the opening or closing micro switch to act, and at the moment, the opening and closing contactor coil is powered off to cut off the motor loop.
As shown in fig. 2, a single line diagram of GIS spaced single lines is sequentially connected in series with a live display, a disconnecting switch QE3 (disconnecting switch 3), a disconnecting switch QS2 (disconnecting switch 2), a disconnecting switch QE2 (disconnecting switch 2), a circuit breaker QF, a disconnecting switch QE1 (disconnecting switch 1) and a disconnecting switch QS1 (disconnecting switch 1), wherein the disconnecting switch QE3 is grounded, the disconnecting switch QE2 is grounded, and the disconnecting switch QE1 is also grounded. As shown in the figure 3, the GIS interval equipment electric locking logic enables two choices to be provided for switching on the breaker, one choice is that when the isolating switch 1 and the isolating switch 2 are in the separated position, the grounding switch 1 is separated and then the grounding switch 1 is separated, when the isolating switch 1 and the isolating switch 2 are in the separated position, the grounding switch 2 is separated and then the grounding switch 2 is separated, when the breaker, the grounding switch 1 and the grounding switch 2 are in the separated position, the operation of separating and switching on the disconnecting switch 1 can be performed, and when the disconnecting switch 1 is switched on, the breaker can be switched on. Secondly, when the isolating switch 1 and the isolating switch 2 are in the separated position, the grounding switch 1 is separated and combined, when the isolating switch 1 and the isolating switch 2 are in the separated position, the grounding switch 2 is separated and combined, when the isolating switch 1 is in the separated position, the grounding switch 3 is separated and combined when the live display is in the non-electricity state, the grounding switch 3 is further in the separated position, when the circuit breaker, the grounding switch 1, the grounding switch 2 and the grounding switch 3 are in the separated position, the isolating switch 2 can be used for separating and closing, and when the isolating switch 2 is closed, the circuit breaker is closed.
According to the circuit breaker closing and locking logic in the embodiment of the utility model shown in fig. 4, a normally closed contact of a disconnecting switch opening contactor (KA) is connected with a normally closed contact of a closing contactor (KE) in series, and multiple contacts are operated simultaneously, namely, when a contact of the disconnecting switch 1 opening contactor and a contact of the disconnecting switch 1 closing contactor, a contact of the disconnecting switch 2 opening contactor and a contact of the disconnecting switch 2 closing contactor, a contact of the disconnecting switch 3 opening contactor and a contact of the disconnecting switch 3 closing contactor are all in a normally closed state, the circuit breaker is closed. Specifically, as shown in fig. 5, a control loop diagram of the GIS circuit breaker in this embodiment is shown, the circuit breaker is connected to a switch K5 and a switch K6 through a coil YC, and is sequentially connected to a disconnecting contactor of a disconnecting switch 1 and a closing contactor of the disconnecting switch 1, a disconnecting contactor of a disconnecting switch 2 and a closing contactor of the disconnecting switch 2, a disconnecting contactor of a disconnecting switch 3 and a closing contactor of the disconnecting switch 3, which are connected to the switch K5 and the switch K6. When any isolating switch in the GIS equipment main loop is closed and opened, the closing loop corresponding to the breaker is closed, closing of the breaker is forbidden, and when the closing operation of the isolating switch in the GIS equipment main loop is completed, the closing loop of the breaker is restored, and at the moment, the breaker can normally perform closing operation.
Wherein the electrical five-way latch of the disconnector interlocks with the responding circuit breaker and the earth blade, the earth blade interlocks with the associated barrier blade. The number of auxiliary contacts of the disconnecting switch opening and closing contactor is increased, and the reliability of the GIS electric locking loop is ensured. The contact cable added to the GIS electric locking loop causes the GIS local control cabinet to logically design and access all feedback isolating switch opening and closing transient processes in the GIS local control cabinet to the GIS breaker closing operation loop.
GIS device electrical loop embodiment:
the utility model provides an GIS equipment electrical circuit, including isolator, circuit breaker and isolator divide-shut brake circuit and circuit breaker switch-on return circuit, the disconnect contactor has been concatenated in the isolator divide-shut brake circuit, the switch-on contactor has concatenated in the isolator switch-on circuit, wherein concatenate each isolator divide-shut contactor normally closed contact and isolator switch-on contactor normally closed contact that are correlated with the circuit breaker in the circuit breaker switch-on return circuit, when any isolator carries out the divide-shut brake operation in-process, in order to prevent that the circuit breaker from carrying out the switch-on by mistake, cause the error operating mode of isolator divide-shut main circuit electric current, the switch-on return circuit of the circuit breaker that corresponds with this isolator is closed this moment. The specific principle is described in detail in the embodiment of the circuit breaker closing control circuit, and is not described in detail here.
Claims (6)
1. The circuit breaker closing control circuit comprises a circuit breaker closing loop and is used for controlling the closing action of the circuit breaker, and is characterized in that the circuit breaker closing loop is internally provided with normally closed contacts of disconnecting switch separating contact and normally closed contacts of disconnecting switch closing contact which are related to the circuit breaker in series, and the circuit breaker closing loop corresponding to the disconnecting switch is closed in the process of separating and closing operation of any disconnecting switch.
2. The circuit breaker closing control circuit of claim 1, wherein the circuit breaker closing circuit is disposed in a GIS in-situ control cabinet, and each of the normally closed contact of the disconnector opening contactor and the normally closed contact of the disconnector closing contactor are connected to the GIS in-situ control cabinet by a lead.
3. The circuit breaker closing control circuit of claim 2, wherein the circuit breaker closing circuit comprises a closing coil.
4. The utility model provides a GIS equipment electrical circuit, includes isolator, circuit breaker and isolator divide-shut brake circuit and circuit breaker switch-on return circuit, has concatenated the divide-shut brake contactor in the isolator divide-shut brake circuit, has concatenated the switch-on contactor in the isolator switch-on circuit, its characterized in that, the circuit breaker switch-on return circuit in concatenate each isolator divide-shut brake contactor normally closed contact and isolator switch-on contactor normally closed contact that are correlated with the circuit breaker, any isolator carries out the divide-shut brake operation in-process, the switch-on return circuit of the circuit breaker that corresponds with this isolator is closed.
5. The electrical circuit of the GIS equipment according to claim 4, wherein the circuit breaker and the circuit breaker closing circuit are arranged in a GIS local control cabinet, and the normally closed contacts of the disconnecting switch opening contactor and the normally closed contacts of the disconnecting switch closing contactor are connected into the GIS local control cabinet through leads.
6. The GIS device electrical circuit of claim 5, wherein the circuit breaker closing circuit includes a closing coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223390293.8U CN219873374U (en) | 2022-12-17 | 2022-12-17 | Circuit breaker closing control circuit and GIS equipment electrical loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223390293.8U CN219873374U (en) | 2022-12-17 | 2022-12-17 | Circuit breaker closing control circuit and GIS equipment electrical loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219873374U true CN219873374U (en) | 2023-10-20 |
Family
ID=88332347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223390293.8U Active CN219873374U (en) | 2022-12-17 | 2022-12-17 | Circuit breaker closing control circuit and GIS equipment electrical loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219873374U (en) |
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2022
- 2022-12-17 CN CN202223390293.8U patent/CN219873374U/en active Active
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