CN107994578B

CN107994578B - Double-bus single-section and double-section wiring misoperation-preventing locking control loop

Info

Publication number: CN107994578B
Application number: CN201810011101.7A
Authority: CN
Inventors: 邹瑄; 刘芮杉; 李泉
Original assignee: Ceec Shaanxi Electric Power Design Institute
Current assignee: Ceec Shaanxi Electric Power Design Institute
Priority date: 2018-01-05
Filing date: 2018-01-05
Publication date: 2024-05-24
Anticipated expiration: 2038-01-05
Also published as: CN107994578A

Abstract

The application provides a double-bus single-section and double-section wiring misoperation-preventing locking control loop, and relates to the technical field of design and application of an electrical misoperation-preventing locking loop of an isolating switch. The control loop comprises a control power supply, a plurality of small buses connected between the control power supply, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop. When the bus bar on one side of the subsection is overhauled at intervals, the auxiliary contact of the bus bar breaker on the other side of the subsection, the auxiliary contact of the isolating switch and the auxiliary contact of the subsection breaker are closed, the GBM1 locking small bus bar and the GBM2 locking small bus bar are communicated and electrified, and the operation of inverting the bus bar is realized. The double-bus single-section and double-section wiring misoperation-preventing locking control loop provided by the application can solve the defect of the design of the conventional double-bus section wiring inverted bus operation electric locking loop, perfect the double-bus section wiring inverted bus operation electric locking loop and provide various operation modes.

Description

Double-bus single-section and double-section wiring misoperation-preventing locking control loop

Technical Field

The application relates to the technical field of design and application of an electrical misoperation-preventing locking loop of an isolating switch, in particular to a double-bus single-section and double-section wiring misoperation-preventing locking control loop.

Background

The electric locking wiring is an important means for locking the operation of the electric engineering equipment, an electric locking loop is designed by combining an isolating switch of an electric operating mechanism with a control loop of the isolating switch, and an electromagnetic lock can be adopted for the isolating switch operated manually to realize the electric locking function. Compared with the microcomputer five-prevention locking, the electric locking has the advantages that a mechanism control loop is directly disconnected, and the universal key can not be used for unlocking, so that the reliability is higher. Therefore, the electric locking loop is still adopted as the most important misoperation prevention measure in important loops such as bus knife switch operation and the like.

In recent years, along with the continuous deepening of urban process in China, the requirements on reliability are increasingly improved while the power load is rapidly increased, the double-bus sectional wiring distribution device in the transformer substation is increasingly widely applied, and the existing design of the conventional double-bus sectional wiring inverted bus operation electric locking loop has an incomplete place.

Taking a conventional double-bus single-section wiring isolating switch inverted bus operation electric locking loop as an example, fig. 1 is a schematic diagram of a locking circuit of an inverted bus electric locking wire of the conventional double-bus single-section wiring isolating switch, and fig. 2 is a schematic diagram of a main circuit of an inverted bus electric locking wire of the conventional double-bus single-section wiring isolating switch.

The double-bus single-section wiring main circuit is provided with three buses, namely an I bus, an II bus and a III bus. The I bus and the II bus are arranged on a low-voltage control line, a GBM1 locking small bus is arranged at an outlet interval, and an interlocking isolating switch reverse bus operation locking loop is formed by an auxiliary contact DLM1 of an I-II bus-to-bus breaker arranged between the I bus and the II bus, an I-II bus-to-bus isolating switch 1GM1 and an I-II bus-to-bus isolating switch 2GM 1; and the II bus and the III bus are arranged on a low-voltage control line, a GBM2 locking small bus is arranged at an outlet interval, and an interlocking isolating switch reverse bus operation locking loop is formed by an auxiliary contact DLM2 of an II-III bus-to-bus breaker, an auxiliary contact 1GM2 of the II-III bus-to-bus isolating switch and an auxiliary contact 2GM2 of the II-III bus-to-bus isolating switch. The reverse bus operation electric locking loops of the disconnecting switches on the two sides of the sectionalized interval are independent of each other and are not connected.

The conventional double-bus sectionalized wiring inverted bus operation electric locking loop is independent of each other due to the fact that inverted bus operation electric locking loops of bus isolating switches on two sides of a sectionalized interval are not connected, and the inverted bus operation can be carried out only when auxiliary contacts DLM1 of an I-II bus-bar breaker and auxiliary contacts DLM1 of the I-II bus-bar isolating switch and I-II bus-bar isolating switch 2GM1 of the I-II bus-bar breaker are closed; the outgoing line interval of the II bus and the III bus can be inverted when the auxiliary contacts DLM2 and the II-III bus isolating switch 1GM2 and the II-III bus isolating switch 2GM2 of the II-III bus breaker are closed, and the inverted bus operation on one side can not be realized when the outgoing line interval is overhauled on the other side, so that the flexibility advantage of the sectional wiring of the double buses is limited.

The conventional double-bus double-section wiring inverted bus operation electric locking circuit has a similar connection mode with the conventional double-bus single-section wiring inverted bus operation electric locking circuit. Fig. 3 is a schematic diagram of a latching circuit of a reverse bus electrical latching wire of a conventional double-bus double-section wiring isolating switch, and fig. 4 is a schematic diagram of a main circuit of a reverse bus electrical latching wire of a conventional double-bus double-section wiring isolating switch.

Likewise, when all the outgoing line intervals are overhauled at one side bus bar interval, the operation of the side inverted bus bar cannot be realized, and the flexibility advantage of the double bus bar sectional wiring is limited.

The electric locking design scheme often ignores the influence of the bus segment interval on the bus inverting operation electric locking wiring, and simply applies the double-bus wiring isolating switch locking wiring scheme in the electric engineering electric design manual electric secondary part, and solves the problems that the double-bus segment wiring inverting operation electric locking wiring is incomplete, the operation mode is limited and the like by limiting the operation mode or matching with a microcomputer five-prevention scheme.

Therefore, it is desirable to provide a dual bus segment wiring back-off operation electrical lockout circuit scheme that can perfect the dual bus segment wiring back-off operation electrical lockout circuit and provide multiple modes of operation.

Disclosure of Invention

The application provides a double-bus single-section and double-section wiring misoperation-preventing locking control loop, which aims to solve the defect of the design of a conventional double-bus section wiring inverted bus operation electric locking loop, perfect the double-bus section wiring inverted bus operation electric locking loop and provide double-bus section wiring inverted bus operation electric locking loop schemes with various operation modes.

A double-bus single-segment wiring misoperation-preventive locking control loop comprises: a control power supply provided with an A phase line and an N phase line, an I female isolating switch control wiring, an II female isolating switch control wiring and a III female isolating switch control wiring which are connected between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop,

The female isolator control wiring of II includes: the control wiring of the IIa female isolating switch and the control wiring of the IIb female isolating switch are connected with the I bus and the II bus at the inlet-outlet line interval; the IIb bus isolating switch control wiring is connected with the II bus isolating switch control wiring of the I bus and III bus inlet-outlet line interval;

The GBM1 locking small bus is arranged between the I female isolating switch and the IIa female isolating switch at intervals; the GBM2 locking small bus is arranged between the IIb bus isolating switch and the III bus isolating switch at intervals;

The GBM control loop comprises an I-II bus-tie isolating switch auxiliary contact 1GM1, an I-II bus-tie isolating switch auxiliary contact 2GM1, an I-II bus-tie breaker auxiliary contact DLM1, a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1, a sectionalized breaker auxiliary contact DLF1, an II-III bus-tie breaker auxiliary contact DLM2, an II-III bus-tie isolating switch auxiliary contact 2GM2 and an II-III bus-tie isolating switch auxiliary contact 1GM2 which are sequentially connected in series; both ends of the GBM control loop are connected with the A phase line;

One end of the GBM1 locking small bus is connected with the A phase line through the I-II bus bar isolating switch auxiliary contact 1GM1, the I-II bus bar isolating switch auxiliary contact 2GM1 and the I-II bus bar breaker auxiliary contact DLM1, and the other end of the GBM1 locking small bus is connected with one end of the GBM2 locking small bus bar through the sectioning isolating switch auxiliary contact 1GF1, the sectioning isolating switch auxiliary contact 2GF1 and the sectioning breaker auxiliary contact DLF 1; the other end of the GBM2 locking small bus is connected with the A phase line through an auxiliary contact DLM2 of the II-III bus-bar breaker, an auxiliary contact 2GM2 of the II-III bus-bar isolating switch and an auxiliary contact 1GM2 of the II-III bus-bar isolating switch.

Optionally, the GBM control loop further includes a disconnector switch DK, where the disconnector switch DK is disposed between the auxiliary contact DLF1 of the sectionalized breaker and the GBM2 locking busbar.

Optionally, the control power supply is an ac control power supply or a dc control power supply.

Optionally, the GBM control loop further includes a protection element 3ZK and a protection element 4ZK, where the protection element 3ZK is disposed between one end of the GBM control loop and the a-phase line; the protection element 4ZK is arranged between the other end of the GBM control loop and the a-phase line control power supply.

A double-bus double-section wiring misoperation-preventive locking control loop comprises: a control power supply provided with an A phase line and an N phase line, an I female isolating switch control wiring, an II female isolating switch control wiring, a III female isolating switch control wiring and an IV female isolating switch control wiring which are connected between the A phase line and the N phase line, a GBM1 locking busbar, a GBM2 locking busbar and a GBM control loop,

The control wiring of the I female isolating switch is on the same side as the control wiring of the II female isolating switch; the III master isolating switch control wiring is on the same side as the IV master isolating switch control wiring;

The GBM1 locking small bus is arranged at the outlet interval of the I female isolating switch and the II female isolating switch, and the GBM2 locking small bus is arranged at the outlet interval of the III female isolating switch and the IV female isolating switch;

The GBM control loop comprises an I-II bus bar isolating switch auxiliary contact 1GM1, an I-II bus bar isolating switch auxiliary contact 2GM1, an I-II bus bar breaker auxiliary contact DLM1, a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1, a sectionalized breaker auxiliary contact DLF2, a sectionalized isolating switch auxiliary contact 2GF2, a sectionalized isolating switch auxiliary contact 1GF2, a III-IV bus bar breaker auxiliary contact DLM2, a III-IV bus bar isolating switch auxiliary contact 2GM2 and a III-IV bus bar isolating switch auxiliary contact 1GM2 which are sequentially connected in series; both ends of the GBM control loop are connected with the A phase line;

One end of the GBM1 locking small bus is connected with the A phase line through the I-II bus bar isolating switch auxiliary contact 1GM1, the I-II bus bar isolating switch auxiliary contact 2GM1 and the I-II bus bar isolating switch auxiliary contact DLM1, and the other end of the GBM1 locking small bus is connected with one end of the GBM2 locking small bus through the sectioning isolating switch auxiliary contact 1GF1, the sectioning isolating switch auxiliary contact 2GF1, the sectioning breaker auxiliary contact DLF2 and the sectioning isolating switch auxiliary contact 2GF2 and the sectioning isolating switch auxiliary contact 1GF 2; the other end of the GBM2 locking small bus is connected with the A phase line through the III-IV bus bar breaker auxiliary contact DLM2, the III-IV bus bar isolating switch auxiliary contact 2GM2 and the III-IV bus bar isolating switch auxiliary contact 1GM 2.

Optionally, the GBM control loop further includes a disconnector switch DK, where the disconnector switch DK is disposed between the auxiliary contact DLF1 of the segment breaker and the auxiliary contact DLF2 of the segment breaker.

Optionally, the GBM control loop further includes a protection element 3ZK and a protection element 4ZK, where the protection element 3ZK is disposed between one end of the GBM control loop and the a-phase line; the protection element 4ZK is arranged between the other end of the GBM control loop and the a-phase line.

The technical scheme provided by the application has the following beneficial technical effects:

The application provides a double-bus single-section wiring misoperation-preventing locking control loop, which comprises the following components: the control power supply is provided with an A phase line and an N phase line, and is connected with an I female isolating switch control wiring, an II female isolating switch control wiring and a III female isolating switch control wiring between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop. When the bus bar on one side of the subsection is overhauled at intervals, the auxiliary contact of the bus bar breaker on the other side of the subsection, the auxiliary contact of the bus bar isolating switch and the auxiliary contact of the subsection breaker and the auxiliary contact of the subsection isolating switch are closed, the GBM1 locking small bus bar is communicated with the GBM2 locking small bus bar, the electrification of the bus bar at intervals is realized, and accordingly the operation of inverting the bus bar is realized. The double-bus single-section wiring misoperation-preventing locking control loop provided by the application can solve the defect of the design of the conventional double-bus section wiring inverted bus operation electric locking loop, perfects the double-bus section wiring inverted bus operation electric locking loop and provides a double-bus section wiring inverted bus operation electric locking loop scheme with various operation modes.

The application provides a double-bus double-section wiring misoperation-preventing locking control loop, which comprises the following components: the control power supply is provided with an A phase line and an N phase line, and is connected with an I female isolating switch control wiring, an II female isolating switch control wiring, a III female isolating switch control wiring and an IV female isolating switch control wiring between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop. When the bus bar on one side of the subsection is overhauled at intervals, the auxiliary contact of the bus bar breaker on the other side of the subsection, the auxiliary contact of the bus bar isolating switch and the auxiliary contact of the subsection breaker and the auxiliary contact of the subsection isolating switch are closed, the GBM1 locking small bus bar is communicated with the GBM2 locking small bus bar, the electrification of the bus bar at intervals is realized, and accordingly the operation of inverting the bus bar is realized. The double-bus double-section wiring misoperation-preventing locking control loop provided by the application can solve the defect of the design of the conventional double-bus section wiring inverted bus operation electric locking loop, perfects the double-bus section wiring inverted bus operation electric locking loop and provides double-bus section wiring inverted bus operation electric locking loop schemes with various operation modes.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic diagram of a latching circuit of a reverse bus electrical latching connection of a conventional double-bus single-segment wiring isolating switch.

Fig. 2 is a schematic diagram of a main circuit of a reverse bus electrical latching connection of a conventional double-bus single-segment wiring isolating switch.

Fig. 3 is a schematic diagram of a latching circuit of a reverse bus electrical latching connection of a conventional double-bus double-segment wiring isolating switch.

Fig. 4 is a schematic diagram of a main circuit of a reverse bus electrical latching connection of a conventional double-bus double-section wiring isolating switch.

Fig. 5 is a schematic diagram of a latch circuit of a dual-bus single-segment wiring anti-misoperation latch control loop according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a latch circuit of a dual-bus dual-segment wiring anti-misoperation latch control loop according to an embodiment of the present application.

Fig. 7 is a diagram of a closed small bus ac network of a 220kV double bus single-segment wiring misoperation-preventing closed control loop according to an embodiment of the present application.

Fig. 8 is a diagram of a 110kV double-bus double-segment wiring anti-misoperation locking control loop locking small bus ac network according to an embodiment of the present application.

Detailed Description

Referring to fig. 5, a schematic diagram of a latch circuit of a dual-bus single-segment wiring anti-misoperation latch control loop according to the present embodiment is shown, and a main circuit schematic diagram of the dual-bus single-segment wiring anti-misoperation latch control loop is shown in fig. 2.

A double-bus single-segment wiring misoperation-preventive locking control loop comprises: the control power supply is provided with an A phase line and an N phase line, and is connected with an I female isolating switch control wiring, an II female isolating switch control wiring and a III female isolating switch control wiring between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop.

The female isolator control wiring of II includes: the control wiring of the IIa bus isolating switch and the control wiring of the IIb bus isolating switch are II bus isolating switch control wiring connected with the I bus and the II bus at intervals of in-out lines and out-in lines; the control wiring of the IIb bus isolating switch is connected with the I bus isolating switch control wiring of the I bus and the I bus inlet-outlet line interval.

The GBM1 locking small bus is arranged between the I female isolating switch and the IIa female isolating switch at intervals; and GBM2 locking small bus bars are arranged between the IIb bus isolating switch and the III bus isolating switch at intervals.

The I bus, the II bus and the III bus refer to a high-voltage power distribution device, namely a primary bus; the control wiring of the I female isolating switch, the control wiring of the II female isolating switch, the control wiring of the III female isolating switch, the small GBM1 locking bus, the small GBM2 locking bus and the GBM control loop are small buses or loops arranged on the low-voltage control line; the I female isolating switch, the IIa female isolating switch, the IIb isolating switch and the III female isolating switch are normally closed auxiliary contacts and normally open auxiliary contacts of the isolating switches arranged on control wires of the corresponding bus isolating switches.

The GBM control loop comprises an I-II bus-tie isolating switch auxiliary contact 1GM1, an I-II bus-tie isolating switch auxiliary contact 2GM1, an I-II bus-tie breaker auxiliary contact DLM1, a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1, a sectionalized breaker auxiliary contact DLF1, an II-III bus-tie breaker auxiliary contact DLM2, an II-III bus-tie isolating switch auxiliary contact 2GM2 and an II-III bus-tie isolating switch auxiliary contact 1GM2 which are sequentially connected in series; both ends of the GBM control loop are connected with the A phase line.

One end of the GBM1 locking small bus is connected with the A phase line through an I-II bus bar isolating switch auxiliary contact 1GM1 and an I-II bus bar isolating switch auxiliary contact 2GM1 and an I-II bus bar circuit breaker auxiliary contact DLM1, and the other end of the GBM1 locking small bus is connected with one end of the GBM2 locking small bus through a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1 and a sectionalized circuit breaker auxiliary contact DLF 1; the other end of the GBM2 locking small bus is connected with the A phase line through an auxiliary contact DLM2 of the II-III bus-bar breaker, an auxiliary contact 2GM2 of the II-III bus-bar isolating switch and an auxiliary contact 1GM2 of the II-III bus-bar isolating switch.

The control wiring of the I-type female disconnecting switch comprises an I-type female disconnecting switch protection element 1ZK and an I-type female disconnecting switch normally-closed auxiliary contact DL1 and an IIa-type female disconnecting switch normally-closed auxiliary contact 2G1C, I which are sequentially connected in series, and a circuit module of the I-type female disconnecting switch 1G 1. One end of the I-shaped female isolating switch protection element 1ZK is connected with the A-phase line, and one end of the I-shaped female isolating switch 1G1 circuit module is connected with the N-phase line.

The IIa main isolating switch control wiring comprises an IIa main isolating switch protection element 2ZK and an IIa main isolating switch normally-closed auxiliary contact DL1 which are sequentially connected in series, and an I main isolating switch normally-closed auxiliary contact 1G1C, IIa main isolating switch 2G1 circuit module. One end of the IIa main isolating switch protection element 2ZK is connected with the a phase line, and one end of the IIa main isolating switch 2G1 circuit module is connected with the N phase line.

The IIb female isolating switch control wiring comprises an IIb female isolating switch protection element 1ZK and an IIb female circuit breaker normally-closed auxiliary contact DL2 and an III female isolating switch normally-closed auxiliary contact 2G2C, IIb which are sequentially connected in series, and a circuit module of the IIb female isolating switch 1G 2. One end of the IIb female isolating switch protection element 1ZK is connected with the A phase line, and one end of the IIb female isolating switch 2G1 circuit module is connected with the N phase line.

The III-type female isolating switch control wiring comprises a III-type female isolating switch protection element 2ZK and a III-type female isolating switch normally-closed auxiliary contact DL2 and an IIb-type female isolating switch normally-closed auxiliary contact 1G2C, III which are sequentially connected in series, and a 2G2 circuit module of the III-type female isolating switch. One end of the III-phase female disconnecting switch protection element 2ZK is connected with the A-phase line, and one end of the III-phase female disconnecting switch 2G2 circuit module is connected with the N-phase line.

The GBM1 locking busbar is connected with one end of a normally open auxiliary contact 2G1O of the IIa main isolating switch, and the other end of the normally open auxiliary contact 2G1O of the IIa main isolating switch is connected with the public end of the normally closed auxiliary contacts 2G1C of the IIa main isolating switch and the public end of the circuit module of the I main isolating switch 1G 1.

The GBM1 locking busbar is connected with one end of the normally open auxiliary contact 1G1O of the I female isolating switch, and the other end of the normally open auxiliary contact 1G1O of the I female isolating switch is connected with the common end of the normally closed auxiliary contact 1G1C of the I female isolating switch and the common end of the IIa female isolating switch 2G1 circuit module.

The GBM2 locking busbar is connected with one end of a normally open auxiliary contact 2G2O of the III-type female isolating switch, and the other end of the normally open auxiliary contact 2G1O of the III-type female isolating switch is connected with the common end of a normally closed contact 2G2C of the III-type female isolating switch and a common end of a circuit module of the IIb-type female isolating switch 1G 2.

The GBM2 locking busbar is connected with one end of a normally open auxiliary contact 1G2O of the IIb isolating switch, and the other end of the normally open auxiliary contact 1G2O of the IIb isolating switch is connected with the common end of normally closed auxiliary contacts 1G2C of the IIb isolating switch and the common end of the III isolating switch 2G2 circuit module.

The I female disconnecting switch 1G1 circuit module, the IIa female disconnecting switch 2G1 circuit module, the IIb female disconnecting switch 1G2 circuit module and the III female disconnecting switch 2G2 circuit module are related mechanism wiring or electromagnetic locking devices.

And when the auxiliary contacts 1GM1 and 2GM1 of the I-II bus-tie isolating switch and the auxiliary contact DLM1 of the I-II bus-tie circuit breaker are closed, the GBM1 locking small bus is electrified, so that the operation of mutually inverting the buses by the I bus and the II bus is realized.

And when the auxiliary contacts 2GM2 and 1GM2 of the II-III bus isolating switch and the auxiliary contacts DLM2 of the II-III bus isolating switch are closed, the GBM2 locking small bus is electrified, so that the operation of mutually inverting the buses by the II bus and the III bus is realized.

When the I bus-II bus is overhauled at intervals, the auxiliary contact 1GM2 of the II-III bus-tie isolating switch, the auxiliary contact 2GM2 of the II-III bus-tie isolating switch and the auxiliary contact DLM2 of the II-III bus-tie breaker are sequentially closed, and the GBM2 locking busbar is electrified; and the sectional isolating switch auxiliary contact 1GF1, the sectional isolating switch auxiliary contact 2GF1 and the sectional breaker auxiliary contact DLF1 are sequentially closed, so that the GBM1 locking busbar is communicated with the GBM2 locking busbar, the GBM1 locking busbar can be electrified, and the operation of mutually inverting the busbar by the I busbar and the II busbar is realized.

When the II bus-III bus is overhauled at intervals, the auxiliary contact 1GM1 of the I-II bus-tie isolating switch, the auxiliary contact 2GM1 of the I-II bus-tie isolating switch and the auxiliary contact DLM1 of the I-II bus-tie breaker are sequentially closed, and then the GBM1 locking busbar is electrified; and the sectional isolating switch auxiliary contact 1GF1, the sectional isolating switch auxiliary contact 2GF1 and the sectional breaker auxiliary contact DLF1 are sequentially closed, so that the GBM1 locking busbar is communicated with the GBM2 locking busbar, the GBM2 locking busbar can be electrified, and the operation of mutually inverting the busbar by the busbar II and the busbar III is realized.

The positional relationship between the auxiliary contact of the disconnecting switch and the auxiliary contact of the circuit breaker in the present embodiment is not limited to the manner provided in the present embodiment.

The circuit breaker designed in the embodiment is an oil circuit breaker, a sulfur hexafluoride circuit breaker or a vacuum circuit breaker.

The isolating switch designed in the embodiment follows the principle of' on-off before on.

Optionally, the GBM control loop further includes a disconnector switch DK, where the disconnector switch DK is disposed between the sectionalized breaker DLF1 and the GBM2 enclosed busbar. When the operation does not need to realize the operation of inverting the bus through the sectioning interval and the far-end bus-bar interval, the electrical connection between the GBM1 locking small bus and the GBM2 locking small bus can be disconnected by disconnecting the disconnecting switch DK.

Optionally, the power source is an ac control power source or a dc control power source. The embodiment provides a wiring scheme adopting an alternating current control power supply. And similarly, a direct current control power supply is adopted, and related secondary elements in the locking circuit are replaced by direct current equipment.

Optionally, the GBM control loop further comprises a protection element 3ZK and a protection element 4ZK. The protection element 3ZK is arranged between one end of the GBM control loop and the a-phase line, and the protection element 4ZK is arranged between the other end of the GBM control loop and the a-phase line. One end of the protection element 3ZK is connected with the A phase line, and the other end of the protection element is connected with one end of the II bus-tie isolating switch 1GM 1; one end of the protection element 4ZK is connected with the A phase line, and the other end is connected with one end of the II bus-tie isolating switch 1GM 2. The protection element can play a role in protecting the safe operation of the circuit under abnormal conditions.

The protection element in this embodiment may be a circuit breaker or a fuse that satisfies various conditions.

Referring to fig. 6, a schematic diagram of a latch circuit of a dual-bus dual-segment wiring anti-misoperation latch control loop provided in this embodiment is shown, and a main circuit schematic diagram of the dual-bus dual-segment wiring anti-misoperation latch control loop is shown in fig. 4.

A double-bus double-section wiring misoperation-preventive locking control loop comprises: the control power supply is provided with an A phase line and an N phase line, and is connected with an I female isolating switch control wiring, an II female isolating switch control wiring, a III female isolating switch control wiring and an IV female isolating switch control wiring between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop.

The same sides of the control wiring of the I female isolating switch and the control wiring of the II female isolating switch, and the same sides of the control wiring of the III female isolating switch and the control wiring of the IV female isolating switch.

The outlet interval of the I and II female isolating switches is provided with a GBM1 locking small bus, and the outlet interval of the III and IV female isolating switches is provided with a GBM2 locking small bus.

The I bus, the II bus, the III bus and the IV bus refer to a high-voltage power distribution device, namely a primary bus; the control wiring of the I female isolating switch, the control wiring of the II female isolating switch, the control wiring of the III female isolating switch, the control wiring of the IV female isolating switch, the small GBM1 locking bus, the small GBM2 locking bus and the GBM control loop are small buses or loops arranged on the low-voltage control line; the I female isolating switch, the II female isolating switch, the III isolating switch and the IV female isolating switch are arranged on the isolating switch normally-closed auxiliary contact and the isolating switch normally-open auxiliary contact of the corresponding bus isolating switch control wiring.

The GBM control loop comprises an I-II bus bar isolating switch auxiliary contact 1GM1, an I-II bus bar isolating switch auxiliary contact 2GM1, an I-II bus bar breaker auxiliary contact DLM1, a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1, a sectionalized breaker auxiliary contact DLF2, a sectionalized isolating switch auxiliary contact 2GF2, a sectionalized isolating switch auxiliary contact 1GF2, a III-IV bus bar breaker auxiliary contact DLM2, a III-IV bus bar isolating switch auxiliary contact 2GM2 and a III-IV bus bar isolating switch auxiliary contact 1GM2 which are sequentially connected in series, and two ends of the GBM control loop are connected with an A phase line.

One end of the GBM1 locking small bus is connected with the A phase line through an I-II bus bar isolating switch auxiliary contact 1GM1 and an I-II bus bar isolating switch auxiliary contact 2GM1 and an I-II bus bar breaker auxiliary contact DLM1, and the other end of the GBM1 locking small bus is connected with one end of the GBM2 locking small bus through a sectionalizing switch auxiliary contact 1GF1, a sectionalizing switch auxiliary contact 2GF1, a sectionalizing breaker auxiliary contact DLF1 and a sectionalizing breaker auxiliary contact DLF 2; the other end of the GBM2 locking small bus is connected with the A phase line through auxiliary contacts DLM2 of the III-IV bus bar breaker, auxiliary contacts 2GM2 of the III-IV bus bar isolating switch and auxiliary contact 1GM2 of the III-IV bus bar isolating switch.

The control wiring of the I female disconnecting switch comprises an I female disconnecting switch protection element 1ZK, an I female breaker normally-closed auxiliary contact DL1 and an II female disconnecting switch normally-closed auxiliary contact 2G1C, I which are connected in series in sequence, and a circuit module of the I female disconnecting switch 1G 1. One end of the I-shaped female isolating switch protection element 1ZK is connected with the A-phase line, and one end of the I-shaped female isolating switch 1G1 circuit module is connected with the N-phase line.

The control wiring of the II busbar isolating switch comprises a II busbar isolating switch protection element 2ZK, a II busbar isolating switch normally-closed auxiliary contact DL1 and an I busbar isolating switch normally-closed auxiliary contact 1G1C, II which are sequentially connected in series, and a circuit module of the II busbar isolating switch 2G 1. One end of the II-type female isolating switch protection element 2ZK is connected with the A phase line, and the other end of the II-type female isolating switch 2G1 circuit module is connected with the N phase line.

And the III bus isolating switch control wiring comprises a III bus isolating switch protection element 1ZK, a III bus breaker normally-closed auxiliary contact DL2 and an IV bus isolating switch normally-closed auxiliary contact 2G2C, III which are sequentially connected in series, and a circuit module of the III bus isolating switch 1G 2. One end of the III-phase female disconnecting switch protection element 1ZK is connected with the A-phase line, and one end of the III-phase female disconnecting switch 2G1 circuit module is connected with the N-phase line.

The control wiring of the IV bus isolation switch comprises an IV bus isolation switch protection element 2ZK and an IV bus breaker normally-closed auxiliary contact DL2 and an III bus isolation switch normally-closed auxiliary contact 1G2C, IV which are sequentially connected in series, and a circuit module of the IV bus isolation switch 2G 2. One end of the IV female disconnecting switch protection element 2ZK is connected with the A phase line, and one end of the IV female disconnecting switch 2G2 circuit module is connected with the N phase line.

The GBM1 locking busbar is connected with one end of a normally open auxiliary contact 2G1O of the II-type female isolating switch, and the other end of the normally open auxiliary contact 2G1O of the II-type female isolating switch is connected with the common end of the normally closed auxiliary contact 2G1C of the II-type female isolating switch and the common end of the circuit module of the I-type female isolating switch 1G 1.

The GBM1 locking busbar is connected with one end of a normally open auxiliary contact 1G1O of the I female isolating switch, and the other end of the normally open auxiliary contact 1G1O of the I female isolating switch is connected with the common end of a normally closed auxiliary contact 1G1C of the I female isolating switch and a common end of a circuit module of the II female isolating switch 2G 1.

The GBM2 locking busbar is connected with one end of a normally open auxiliary contact 2G2O of the IV master isolating switch, and the other end of the normally open auxiliary contact 2G1O of the IV master isolating switch is connected with the common end of normally closed auxiliary contacts 2G2C of the IV master isolating switch and the common end of the III master isolating switch 1G2 circuit module.

The GBM2 locking busbar is connected with one end of a normally open auxiliary contact 1G2O of the III-type female isolating switch, and the other end of the normally open auxiliary contact 1G2O of the III-type female isolating switch is connected with the common end of normally closed auxiliary contacts 1G2C of the III-type female isolating switch and the common end of the IV-type female isolating switch 2G2 circuit module.

The I female isolating switch 1G1 circuit module, the II female isolating switch 2G1 circuit module, the III female isolating switch 1G2 circuit module and the IV female isolating switch 2G2 circuit module are related mechanism wiring or electromagnetic locking devices.

And when the auxiliary contacts 2GM2 and 1GM2 of the III-IV bus-tie isolating switch and the auxiliary contacts DLM2 of the III-IV bus-tie circuit breaker are closed, the GBM2 locking small bus is electrified, so that the operation of mutually inverting buses of the II bus and the III bus is realized.

When the I bus-II bus is overhauled at intervals, closing the auxiliary contact 1GM2 of the III-IV bus-tie isolating switch, the auxiliary contact 2GM2 of the III-IV bus-tie isolating switch and the auxiliary contact DLM2 of the II-III bus-tie breaker, and locking the small GBM2 bus to be electrified; the sectional isolating switch auxiliary contact 1GF1, the sectional isolating switch auxiliary contact 2GF1 and the sectional circuit breaker auxiliary contact DLF1 are sequentially closed, the sectional isolating switch auxiliary contact 1GF2, the sectional isolating switch auxiliary contact 2GF2 and the sectional circuit breaker auxiliary contact DLF2 are sequentially closed, the GBM1 locking busbar is communicated with the GBM2 locking busbar, the GBM1 locking busbar can be electrified, and the busbar inverting operation between the I busbar and the II busbar is realized.

When the III-IV bus is overhauled at intervals, the auxiliary contact 1GM1 of the I-II bus isolating switch, the auxiliary contact 2GM1 of the I-II bus isolating switch and the auxiliary contact DLM1 of the I-II bus breaker are sequentially closed, and then the GBM1 locking busbar is electrified; the sectional isolating switch auxiliary contact 1GF1, the sectional isolating switch auxiliary contact 2GF1 and the sectional circuit breaker auxiliary contact DLF1 are sequentially closed, the sectional isolating switch auxiliary contact 1GF2, the sectional isolating switch auxiliary contact 2GF2 and the sectional circuit breaker auxiliary contact DLF2 are sequentially closed, the GBM1 locking busbar is communicated with the GBM2 locking busbar, the GBM2 locking busbar can be electrified, and the busbar inverting operation between the III busbar and the IV busbar is realized.

The positional relationship between the disconnecting switch and the circuit breaker in the present embodiment is not limited to the manner provided in the present embodiment.

Optionally, the GBM control loop further includes a disconnector switch DK, which is disposed between the sectionalizer DLF1 and the sectionalizer DLF 2. When the operation does not need to realize the operation of inverting the bus through the sectioning interval and the far-end bus-bar interval, the electrical connection between the GBM1 locking small bus and the GBM2 locking small bus can be disconnected by disconnecting the disconnecting switch DK.

Optionally, the power source is an ac control power source or a dc control power source. The embodiment provides a wiring scheme adopting an alternating current control power supply. And similarly, a direct current control power supply is adopted, and related secondary elements in the closed loop are replaced by direct current equipment.

A double-bus single-section wiring misoperation-preventing locking control loop is adopted by a certain 500kV transformer substation project and a 220kV power distribution device.

The power distribution device adopts an outdoor AIS power distribution device. The outgoing line 18 of the 220kV power distribution device returns, wherein the lines 1 to 9 are connected with I, II buses, and the lines 10 to 18 are connected with II and III buses; and the main transformer 220kV distribution device is connected with the main transformer 220kV inlet wire 3 times, wherein the main transformer #1 is connected with the main transformer I, II, and the main transformer #2 and the main transformer #3 are connected with the main transformer II and the main transformer III.

Two sections of small locking buses are arranged in the double-bus single-section wiring misoperation-preventing locking control loop and are GBM1 and GBM2 respectively, wherein the small GBM1 locking buses are used for locking the electric operation of the line connected with the I bus and the II bus and the main transformer incoming line interval bus isolating switch, and the small GBM2 locking buses are used for locking the electric operation of the line connected with the II bus and the III bus and the main transformer incoming line interval bus isolating switch. As shown in fig. 5 and fig. 2, a primary transformer incoming line (or outgoing line) interval of 10 turns is arranged on a primary bus and a secondary bus of I, a primary transformer incoming line (or outgoing line) interval of 11 turns is arranged on a primary bus and a secondary bus of II, a primary transformer incoming line or outgoing line interval of 11 turns is arranged on a secondary bus of III, one ends of two auxiliary contacts of a side isolating switch of the primary transformer incoming line or outgoing line interval are respectively connected with two buses, and the other ends of the two auxiliary contacts of the isolating switch are respectively connected with auxiliary contacts of a bus-bar circuit breaker.

The 220kV double-bus single-section wiring misoperation-preventing locking control loop locking small bus alternating current network diagram is shown in fig. 7. GBM1 locking small bus bars are arranged in each interval terminal box connected with the I bus and the II bus, GBM2 locking small bus bars are arranged in each interval terminal box connected with the II bus and the III bus, and GBM1 (or GBM 2) locking small bus bars in each interval terminal box are communicated with each other by adopting secondary cables. And two sections of small locking buses GBM1 and GBM2 are arranged in the I bus and III bus sectionalized interval terminal box, and the small locking buses GBM1 and GBM2 are connected through a sectionalized breaker auxiliary contact DLF1, a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1 and an isolating knife switch DK as shown in FIG. 5.

There are two ways to charge the GBM1 latch-up busbar. The first mode is that auxiliary contacts 1GM1 of an I-II bus-tie isolating switch and auxiliary contacts 2GM1 of an I-II bus-tie isolating switch in an I-II bus-tie interval and auxiliary contacts DLM1 of an I-II bus-tie circuit breaker are closed; the second mode is that the auxiliary contacts 2GM2 and the auxiliary contacts 1GM2 of the II-III bus-tie isolating switch and the auxiliary contacts DLM2 of the II-III bus-tie circuit breaker are all closed, and the auxiliary contacts 1GF1, the auxiliary contacts 2GF1 and the auxiliary contacts DLF1 of the I bus-tie and III bus-tie segment isolating switch are all closed.

After the GBM1 locking small bus is electrified, a line connected to the I bus and the II bus and a main transformer incoming line interval bus isolating switch control loop are connected with a control power supply through the GBM1 locking small bus, and then the inverted bus operation can be performed. When the auxiliary contact of the interval breaker and the auxiliary contact of the other bus isolating switch are closed, the switching-on and switching-off operation of the bus isolating switch of the non-inverted bus can be performed.

There are two ways to charge the GBM2 latch-up busbar. The first mode is that auxiliary contacts 1GM2 of a II-III bus-tie isolating switch and auxiliary contacts 2GM2 of a II-III bus-tie isolating switch in a II-III bus-tie interval and auxiliary contacts DLM2 of a II-III bus-tie circuit breaker are closed; the second mode is that the auxiliary contact 1GM1 of the I-II bus-tie isolating switch and the auxiliary contact 2GM1 of the I-II bus-tie isolating switch and the auxiliary contact DLM1 of the I-II bus-tie breaker are all closed in the interval of the I bus and the II bus-tie, and the auxiliary contact 1GF1 of the sectionalizing isolating switch, the auxiliary contact 2GF1 of the sectionalizing isolating switch and the auxiliary contact DLF1 of the sectionalizing breaker are all closed in the interval of the I bus and the III bus.

After the GBM2 locking small bus is electrified, a circuit connected to the II bus and the III bus and a main transformer incoming line interval bus isolating switch control loop are connected with a control power supply through the GBM2 locking small bus, and then the inverted bus operation can be performed. When the auxiliary contact of the interval breaker and the auxiliary contact of the other bus isolating switch are closed, the switching-on and switching-off operation of the bus isolating switch of the non-inverted bus can be performed.

And when the operation does not need to realize the operation of inverting the bus through the sectionalized interval and the remote bus-bar interval, the electric connection between the GBM1 locking small bus and the GBM2 locking small bus can be disconnected by disconnecting the DK control switch.

A330 kV transformer substation project and a 110kV distribution device adopt a double-bus double-section wiring misoperation-preventing locking control loop.

The power distribution device adopts an outdoor AIS power distribution device, an outgoing line 22 of the 110kV power distribution device returns, wherein lines 1-11 are connected with I bus and II bus, lines 12-22 are connected with III bus and IV bus, an incoming line 3 of the main transformer 110kV power distribution device returns, an incoming line of the #1 main transformer 110kV is connected with I bus and II bus, and an incoming line of the #2 main transformer and an incoming line of the #3 main transformer 110kV is connected with III bus and IV bus.

Two sections of small locking buses are arranged in the double-bus double-section wiring misoperation-preventing locking control loop and are GBM1 and GBM2 respectively, wherein the small GBM1 locking buses are used for locking the electric operation of the line connected with the I bus and the II bus and the main transformer incoming line interval bus isolating switch, and the small GBM2 locking buses are used for locking the electric operation of the line connected with the III bus and the IV bus and the main transformer incoming line interval bus isolating switch. As shown in fig. 6 and fig. 4, a 12-primary-transformer incoming line (or outgoing line) interval is set on the I-bus and the II-bus, a 13-primary-transformer incoming line (or outgoing line) interval is set on the III-bus and the IV-bus, one ends of two bus disconnecting switch auxiliary contacts of the primary-transformer incoming line (or outgoing line) interval are respectively connected with two buses, and the other ends of the two disconnecting switch auxiliary contacts are respectively connected with an auxiliary contact of a bus-bar circuit breaker.

The 110kV double-bus double-section wiring misoperation-preventing locking control loop locking small bus alternating current network diagram is shown in fig. 8. GBM1 locking small bus bars are arranged in each interval terminal box connected with the I bus and the II bus, GBM2 locking small bus bars are arranged in each interval terminal box connected with the III bus and the IV bus, and GBM1 (or GBM 2) locking small bus bars in each interval terminal box are communicated with each other by adopting secondary cables. A connecting cable is arranged between the I bus and III bus sectioning interval terminal box and the II bus and IV bus sectioning interval terminal box, and the GBM1 and GBM2 locking small bus is connected through a sectionalized isolating switch auxiliary contact 1GF1, a sectionalized isolating switch auxiliary contact 2GF1, a sectionalized breaker auxiliary contact DLF2, a sectionalized isolating switch auxiliary contact 2GF2, a sectionalized isolating switch auxiliary contact 1GF2 and an isolating knife switch DK according to the diagram shown in FIG. 6.

There are two ways to charge the GBM1 latch-up busbar. The first mode is that auxiliary contacts 1GM1 of an I-II bus-tie isolating switch and auxiliary contacts 2GM1 of an I-II bus-tie isolating switch in an I-II bus-tie interval and auxiliary contacts DLM1 of an I-II bus-tie circuit breaker are closed; the second mode is that the auxiliary contacts DLM2 and 2GM2 of the III-IV bus tie breaker and the auxiliary contact 1GM2 of the III-IV bus tie breaker in the III bus tie interval and the IV bus tie interval are closed, the auxiliary contact 1GF1 of the sectionalized disconnecting switch, the auxiliary contact 2GF1 of the sectionalized disconnecting switch and the auxiliary contact DLF1 of the sectionalized breaker in the I bus segment interval and the III bus segment interval are closed, and the auxiliary contact DLF2 of the sectionalized breaker, the auxiliary contact 2GF2 of the sectionalized disconnecting switch and the auxiliary contact 1GF2 of the sectionalized disconnecting switch in the II bus segment interval and the IV bus segment interval are closed.

There are two ways to charge the GBM2 latch-up busbar. The auxiliary contacts DLM2 and 2GM2 of the III-IV bus-tie isolating switch and the auxiliary contact 1GM2 of the III-IV bus-tie isolating switch in the III-IV bus-tie interval are closed; the second mode is that the auxiliary contacts 1GM1 and 2GM1 and DLM1 of the I-II bus-tie and the I-III bus-tie are closed, the auxiliary contacts 1GF1 and 2GF1 and DLF1 of the I bus and III bus-tie and the II bus-tie and the sectional breaker auxiliary contacts 2GF2 and 1GF2 of the II bus and IV bus-tie and the II bus-tie are closed.

The GBM2 locking small bus is electrified, and a line connected to the III bus and the IV bus and a main transformer incoming line interval bus isolating switch control loop is connected with a control power supply through the GBM2 small bus, so that the inverted bus operation can be performed. When the auxiliary contact of the interval breaker and the auxiliary contact of the other bus isolating switch are closed, the switching-on and switching-off operation of the bus isolating switch of the non-inverted bus can be performed.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It will be understood that the application is not limited to what has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. The utility model provides a maloperation locking control circuit is prevented in single segmentation wiring of two generating lines which characterized in that includes: a control power supply provided with an A phase line and an N phase line, an I female isolating switch control wiring, an II female isolating switch control wiring and a III female isolating switch control wiring which are connected between the A phase line and the N phase line, a GBM1 locking small bus, a GBM2 locking small bus and a GBM control loop,

One end of the GBM1 locking small bus is connected with the A phase line through the I-II bus bar isolating switch auxiliary contact 1GM1, the I-II bus bar isolating switch auxiliary contact 2GM1 and the I-II bus bar breaker auxiliary contact DLM1, and the other end of the GBM1 locking small bus is connected with one end of the GBM2 locking small bus through the sectioning isolating switch auxiliary contact 1GF1, the sectioning isolating switch auxiliary contact 2GF1 and the sectioning breaker auxiliary contact DLF 1; the other end of the GBM2 locking small bus is connected with the A phase line through an auxiliary contact DLM2 of the II-III bus-bar breaker, an auxiliary contact 2GM2 of the II-III bus-bar isolating switch and an auxiliary contact 1GM2 of the II-III bus-bar isolating switch.

2. The double-bus single-segment wiring misoperation-preventive locking control loop as claimed in claim 1, wherein the GBM control loop further comprises a disconnector switch DK, wherein the disconnector switch DK is arranged between the segment breaker auxiliary contact DLF1 and the GBM2 locking busbar.

3. The double-bus single-segment wiring anti-misoperation locking control loop according to claim 1, wherein the control power supply is an alternating current control power supply or a direct current control power supply.

4. The double-bus single-segment wiring misoperation-preventive locking control loop according to claim 1, characterized in that the GBM control loop further comprises a protection element 3ZK and a protection element 4ZK, wherein the protection element 3ZK is arranged between one end of the GBM control loop and the a-phase line; the protection element 4ZK is arranged between the other end of the GBM control loop and the a-phase line control power supply.

5. The utility model provides a two bus-bar double segmentation wiring prevent maloperation locking control circuit which characterized in that includes: a control power supply provided with an A phase line and an N phase line, an I female isolating switch control wiring, an II female isolating switch control wiring, a III female isolating switch control wiring and an IV female isolating switch control wiring which are connected between the A phase line and the N phase line, a GBM1 locking busbar, a GBM2 locking busbar and a GBM control loop,

6. The double busbar double-section wiring anti-misoperation lockout control loop according to claim 5, wherein the GBM control loop further comprises a disconnector switch DK, the disconnector switch DK being disposed between the section breaker auxiliary contact DLF1 and the section breaker auxiliary contact DLF 2.

7. The double bus double segment wiring anti-misoperation lockout control loop according to claim 5, wherein the control power supply is an ac control power supply or a dc control power supply.

8. The double bus double segment wiring misoperation prevention lockout control loop according to claim 5, wherein the GBM control loop further comprises a protection element 3ZK and a protection element 4ZK, the protection element 3ZK is disposed between one end of the GBM control loop and the a-phase line; the protection element 4ZK is arranged between the other end of the GBM control loop and the a-phase line.