CN210224772U - GIS wiring and arrangement structure - Google Patents

Abstract

The utility model provides a GIS wiring and arrangement structure capable of fast switching, which comprises a main loop, a standby phase and a bus side element; the main loop is communicated with the bus-side element; a circuit breaker is arranged in the bus side element; the main loop is provided with a main loop isolating switch, and the standby phase is provided with a standby isolating switch; the main loop isolating switch and the standby isolating switch are logically interlocked; the standby phase is arranged between the main circuit isolating switch and the bus side element; the main loop comprises an A phase, a B phase and a C phase, and the standby phase comprises an A ' phase, a B ' phase and a C ' phase; the phase A is communicated with the phase A ', the phase B is communicated with the phase B ', and the phase C is communicated with the phase C '. The fast switching of the main transformer standby phase is realized, the structure is simple, the implementation is facilitated, the safety and the high efficiency are realized, and the standby phase does not need to be moved, so that the technical problem that the time for carrying the fault phase and the standby phase is too long is solved. Meanwhile, as the transverse carrying track is not required to be arranged, the occupied area of a main transformer site is saved, the switching time is shortened, and the construction investment of the corresponding track is saved.

Description

GIS wiring and arrangement structure

Technical Field

The utility model relates to a GIS arranges the field, concretely relates to GIS wiring and arrangement structure.

Background

With the continuous improvement of the voltage grade of a power grid in China, 800/1000kV ultrahigh voltage alternating current transmission networks are built gradually, 800/1000kV ultrahigh voltage alternating current transformer substations are enriched gradually, and higher requirements are provided for whether the transformer substation arrangement can save land or not.

At the initial stage of operation of the extra-high voltage transformer substation, all main transformers are not arranged, and a structure of partial main transformers and main transformer standby phases is installed in the substation. If a main transformer has a single-phase fault, the time for switching the standby phase is long, and the long-time load-limited operation of the transformer substation is caused, so that the outgoing power is greatly reduced, and the stable operation of a power grid is seriously influenced. At present, a traditional standby phase switching mode is that a transverse transportation track is arranged on the side of a main transformer transportation road, a longitudinal transportation track is arranged between the main transformer transportation road and a main transformer oil pit, when a certain phase of an installed main transformer fails, a fault phase is firstly shifted out, then the standby phase installed at a reserved position is pushed out along the track, and the standby phase is transported to a corresponding fault main transformer for installation.

The GIS equipment refers to gas insulated metal enclosed switchgear, and generally comprises a partition, a bus and the like; GIL refers to a gas insulated metal closed transmission line; the two are used in combination. GIS equipment can reduce the area of transformer substation to reduce the equipment maintenance. Taking the scales of 2 main transformers in the current period and 4 main transformers of 1000kV in the final period as an example, the traditional standby phase switching mode has the following problems:

1. need set up heavy track for transportation in the main transformer place, because need consider main transformer reserve phase or the clear apart from problem of air of the electrified equipment of relative main transformer both sides during fault transportation, main transformer place longitudinal dimension increases 10m than conventional arrangement scheme (not for the equipment phase), increases area about 3500m²。

2. Even if rail transportation is adopted, due to the fact that the main transformer adopts an integral carrying mode, experiments need to be conducted again after the main transformer is in place, and the like, the main transformer standby phase switching needs about 16 days, and the time is long.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a GIS wiring and arrangement structure that can fast switch over is provided.

The utility model provides a technical scheme that its technical problem adopted is: the GIS wiring and arranging structure comprises a main loop, a standby phase and a bus side element; the main loop is communicated with a bus-side element; a circuit breaker is arranged in the bus side element; the main loop is provided with a main loop isolating switch, and the standby phase is provided with a standby isolating switch; the main loop isolating switch and the standby isolating switch are logically interlocked;

the standby phase is arranged between the main circuit isolating switch and the bus side element;

the main loop comprises an A phase, a B phase and a C phase, and the standby phase comprises an A ' phase, a B ' phase and a C ' phase;

the phase A is communicated with the phase A ', the phase B is communicated with the phase B ', and the phase C is communicated with the phase C '.

Furthermore, the main circuit isolating switch comprises an A-phase switch, a B-phase switch and a C-phase switch;

the A-phase switch is installed on the A-phase, the B-phase switch is installed on the B-phase, and the C-phase switch is installed on the C-phase;

the standby phase isolating switch comprises an A ' phase switch, a B ' phase switch and a C ' phase switch;

the A 'phase switch is installed on the A' phase, the B 'phase switch is installed on the B' phase, and the C 'phase switch is installed on the C' phase.

Furthermore, the system also comprises a bus side isolating switch; the bus-side disconnector is mounted in a bus-side element, which bus-side disconnector is connected in series with a circuit breaker.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a GIS wiring and arrangement structure that can fast switch over utilizes the shutting relation, realizes the fast switch over of main reserve phase that becomes, its simple structure, do benefit to implementation, safe high efficiency, need not remove reserve phase to the technical problem of transport trouble looks and reserve looks required time overlength has been solved. Meanwhile, as the transverse carrying track is not required to be arranged, the occupied area of a main transformer site is saved, the switching time is shortened, and the construction investment of the corresponding track is saved.

Drawings

Fig. 1 is a schematic diagram of the wiring structure of the present invention;

reference numerals: phase 1-A; 2-B phase; 3-C phase; 4-A' phase; a 5-B' phase; 6-C' phase; 7-main circuit isolating switch; 701-A phase switch; a 702-B phase switch; 703-C phase switch; 8-spare phase isolating switch; 801-A' phase switch; an 802-B' phase switch; a 803-C' phase switch; 9-bus bar side element; 901-a current transformer; 902-a circuit breaker; 903-bus side disconnecting switch; 10-main loop bushing; 11-a standby phase bushing; 12-GIS bus.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in the figures, the GIS wiring and layout structure comprises a main circuit, a standby phase and a busbar side element 9; the main circuit communicates with the bus-side element 9; a circuit breaker 902 is provided in the bus bar-side element 9; a main loop isolating switch 7 is installed on the main loop, and a standby isolating switch 8 is installed on the standby phase; the main loop isolating switch 7 and the standby isolating switch 8 are logically interlocked; the standby phase is arranged between the main circuit disconnector 7 and the busbar-side element 9; the main loop comprises an A phase 1, a B phase 2 and a C phase 3, and the standby phase comprises an A ' phase 4, a B ' phase 5 and a C ' phase 6; the phase A1 is communicated with the phase A ' 4, the phase B2 is communicated with the phase B ' 5, and the phase C3 is communicated with the phase C ' 6.

The main loop is communicated with an overhead line through a main loop sleeve 10; the standby phase is communicated with the overhead line through a standby phase bushing 11. The main circuit breaker 7 is installed on the main circuit, and the position where the backup phase is connected to the main circuit is located between the bus bar side member 9 and the main circuit breaker 7. The phase A1 is communicated with the phase A ' 4, the phase B2 is communicated with the phase B ' 5, and the phase C3 is communicated with the phase C ' 6. The bus bar side member 9 includes a current transformer 901, a breaker 902, and the like for connecting the main circuit and the GIS bus bar 12. The circuit breaker 902 has an arc extinguishing function, and can be operated with load to break a line. The logic interlocking of the main circuit isolating switch 7 and the standby isolating switch 8 means that the corresponding phases of the main circuit isolating switch 7 and the standby isolating switch 8 cannot be simultaneously connected, one of the phases is connected, and the other phase is disconnected. When the main loop normally works, the three phases controlled by the main loop isolating switch 7 are all connected, and the three phases controlled by the standby isolating switch 8 are all disconnected. When the main circuit has a fault, the main circuit disconnecting switch 7 and the circuit breaker 902 are opened, so that the main circuit is disconnected from the GIS bus 12. And then the standby phase isolating switch 8 is closed, the breaker 902 is closed, the GIS bus 12 is communicated, and the standby phase is put into use to become a new main phase.

The main loop isolating switch 7 can integrally control the on-off of the main loop, and the standby isolating switch 8 can integrally control the on-off of the standby phase. When a certain phase in a main loop has a fault, the technical problem that only the fault phase cannot be switched exists. In order to solve the above technical problem, it is preferable that the main circuit isolation switch 7 includes an a-phase switch 701, a B-phase switch 702, and a C-phase switch 703; the A-phase switch 701 is installed on an A-phase 1, the B-phase switch 702 is installed on a B-phase 2, and the C-phase switch 703 is installed on a C-phase 3; the standby phase isolating switch 8 comprises an A ' phase switch 801, a B ' phase switch 802 and a C ' phase switch 803; the a 'phase switch 801 is installed on the a' phase 4, the B 'phase switch 802 is installed on the B' phase 5, and the C 'phase switch 803 is installed on the C' phase 6. The a-phase switch 701, the B-phase switch 702 and the C-phase switch 703 respectively control the on and off of the a-phase 1, the B-phase 2 and the C-phase 3, that is: the main loop isolating switch 7 can be controlled in a split phase mode. The a 'phase switch 801, the B' phase switch 802 and the C 'phase switch 803 respectively control the on and off of the a' phase 4, the B 'phase 5 and the C' phase 6, namely: the standby phase isolating switch 8 can be controlled in a split-phase mode. The two work independently without affecting each other. When only one fault phase in the main loop needs to be switched, the A ' phase switch 801, the B ' phase switch 802 and the C ' phase switch 803 are interlocked pairwise respectively, so that only one phase standby phase can be accessed at the same time, and the inter-phase short circuit is prevented. For example: when only the a phase 1 fails and both the B phase 2 and the C phase 3 are normal, the circuit breaker 902 opens, the a phase switch 701 is opened, the a 'phase switch 801 is closed, and the a' phase 4 of the standby phase is accessed. And the B phase 2 and the C phase 3 in the main loop are continuously used. Thus, when a phase in the main loop fails, only the failed phase needs to be switched, and the entire main loop does not need to be switched off. When the whole main loop has multi-phase faults and needs to be integrally switched, the A ' phase switch 801, the B ' phase switch 802 and the C ' phase switch 803 do not need to be interlocked in pairs. After the breaker 902 is disconnected, the a-phase switch 701, the B-phase switch 702 and the C-phase switch 703 are all disconnected, the a ' -phase switch 801, the B ' -phase switch 802 and the C ' -phase switch 803 are all closed, the whole standby phase is connected, and then the switching of the whole fault main loop is realized. At this point, the interlocking relationship between the phases of the standby phase isolating switch 8 is no longer required, but the corresponding standby phase three-phase conductors all need to be complete.

Since the separation point of the circuit breaker 902 is not easily observed at the outside, if the circuit breaker 902 is not completely opened, danger is easily generated, and in order to solve the above technical problems, it is preferable to further include a bus-side disconnecting switch 903; the bus-side disconnector 903 is installed in the bus-side element 9, and the bus-side disconnector 903 is connected in series with the circuit breaker 902. The bus-side disconnector 903 has a clearly visible disconnection point, and disconnection of the bus-side disconnector 903 can further ensure disconnection of the circuit and safety.

The utility model discloses an above do the embodiment of the utility model can be seen from the implementation, the utility model provides a GIS wiring and arrangement structure that can fast switch over utilizes the shutting relation, realizes the fast switch over of main reserve phase that becomes, its simple structure, do benefit to implementation, safe high-efficient, do not need to remove reserve phase to the technical problem who carries trouble looks and reserve phase required time overlength has been solved. Meanwhile, as the transverse carrying track is not required to be arranged, the occupied area of a main transformer site is saved, the switching time is shortened, and the construction investment of the corresponding track is saved.

Claims (3)

1. GIS wiring and arrangement structure, comprising a main circuit, a standby phase and a busbar side element (9); the main circuit is communicated with a bus-side element (9); a circuit breaker (902) is arranged in the bus-side element (9); the method is characterized in that: a main loop isolating switch (7) is installed on the main loop, and a standby isolating switch (8) is installed on the standby phase; the main loop isolating switch (7) is logically interlocked with the standby isolating switch (8);

   the standby phase is arranged between the main circuit isolating switch (7) and the bus-side element (9);

   the main loop comprises an A phase (1), a B phase (2) and a C phase (3), and the standby phase comprises an A ' phase (4), a B ' phase (5) and a C ' phase (6);

   the phase A (1) is communicated with the phase A ' (4), the phase B (2) is communicated with the phase B ' (5), and the phase C (3) is communicated with the phase C ' (6).
2. 2. The GIS wiring and arrangement of claim 1, wherein: the main loop isolating switch (7) comprises an A-phase switch (701), a B-phase switch (702) and a C-phase switch (703);

   the A-phase switch (701) is installed on the A-phase (1), the B-phase switch (702) is installed on the B-phase (2), and the C-phase switch (703) is installed on the C-phase (3);

   the standby phase isolating switch (8) comprises an A ' phase switch (801), a B ' phase switch (802) and a C ' phase switch (803);

   the A 'phase switch (801) is installed on an A' phase (4), the B 'phase switch (802) is installed on a B' phase (5), and the C 'phase switch (803) is installed on a C' phase (6).
3. 3. The GIS wiring and arrangement according to claim 1 or 2, wherein: the system also comprises a bus side isolating switch (903); the bus-side disconnector (903) is mounted in a bus-side element (9), the bus-side disconnector (903) being connected in series with the circuit breaker (902).

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