CN203932698U - A kind of single busbar connection dual-breaker sectional wiring structure - Google Patents

A kind of single busbar connection dual-breaker sectional wiring structure Download PDF

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Publication number
CN203932698U
CN203932698U CN201420384642.1U CN201420384642U CN203932698U CN 203932698 U CN203932698 U CN 203932698U CN 201420384642 U CN201420384642 U CN 201420384642U CN 203932698 U CN203932698 U CN 203932698U
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China
Prior art keywords
main transformer
bus
circuit breaker
breaker
wire inlet
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CN201420384642.1U
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Chinese (zh)
Inventor
陈飞
胡列翔
高美金
高亚栋
金国胜
何英静
侯建生
杜振东
周慧文
俞辰颖
尹康
徐俞音
黄忠华
方瑜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Zhedian Economic Technology Research Institute Co ltd
State Grid Corp of China SGCC
Economic and Technological Research Institute of State Grid Zhejiang Electric Power Co Ltd
Zhejiang Huayun Electric Power Engineering Design Consulting Co
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State Grid Corp of China SGCC
Economic and Technological Research Institute of State Grid Zhejiang Electric Power Co Ltd
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Priority to CN201420384642.1U priority Critical patent/CN203932698U/en
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Abstract

The utility model discloses a kind of single busbar connection dual-breaker sectional wiring structure.Used double bus scheme structure, complex structure, electric component is many, operates underaction, convenience when operation.The utility model comprises first paragraph bus, second segment bus, the first main transformer and the second main transformer, it is characterized in that, in the wire inlet loop access first paragraph bus of described the first main transformer, in the wire inlet loop access second segment bus of the second main transformer, on two sections of described buses, be respectively connected to multiple transmission line circuits; The wire inlet loop that is provided with the 3rd main transformer between two sections of described buses, the wire inlet loop of the 3rd main transformer comprises the 3rd main transformer, two circuit breakers and multiple isolating switch, the 3rd main transformer is connected across between two sections of buses by two circuit breakers.

Description

A kind of single busbar connection dual-breaker sectional wiring structure
Technical field
The utility model relates to electric power system wiring field, specifically a kind of single busbar connection dual-breaker sectional wiring structure.
Background technology
Transformer station is the chief component of electric power system; it is Energy Transfer point important in electrical power trans mission/distribution system; its electrical main connecting wire is the major part of electric power system wiring; its structure directly affects the selection of configuration, automatics and the control mode of lectotype selection, power distribution equipment layout, relaying protection; the own reliability of operation of main electrical scheme structure and electric power system entirety and transformer station, flexibility and economy are closely related; therefore; in Substation Design, determine that rational main electrical scheme structure is very necessary.
Existing main electrical scheme has following several:
(1) single bus scheme.Single bus scheme has that wiring is simply clear, equipment is few, easy to operate, be convenient to enlarging and adopt the advantages such as complete power distribution equipment, but existing underaction reliable, when arbitrary element fault or maintenance, all need the shortcoming that whole power distribution equipment is had a power failure.Single bus scheme is mainly applicable to the transformer station that capacity is little, circuit is few.
(2) single-trunk segmental wiring.After bus section, can from different sections draw two loops to responsible consumer with circuit breaker, have two Power supplies.When one section of bus breaks down, section breaker, automatically by failure removal, ensures normal reach bus uninterrupted power supply and does not cause responsible consumer to have a power failure.When its shortcoming is one section of bus or bus isolating switch fault or maintenance, the loop of this section of bus all will have a power failure within turn(a)round, and outlet is while being double back, often makes overhead transmission line outlet scissors crossing, need be to the balanced enlarging of both direction when enlarging.
(3) double bus scheme.Double bus scheme is by main transformer loop, circuit and two groups of electrical main connecting wires that bus forms.It has that power supply is reliable, scheduling flexibly, enlarging is convenient, be convenient to the advantages such as test, its shortcoming mainly: use bus isolating switch is more, and bus length is longer, and power distribution equipment floor space is larger; In the time of the operation of switching bus,, easily there is misoperation in bus isolating switch frequent operation; Owing to having more electric connecting point between two groups of buses, in the time of the bus isolating switch fault in open position or bus fault, likely make two groups of bus Ji Quan transformer station power distribution equipments stop transport.When the power distribution equipment in transformer station and power plant occupies the large and transmission line circuit of critical role, electric load when more in electrical network, conventionally adopt double bus scheme.When transmission line circuit is more than 4 times in 220kV transformer station of China at present, often adopt double bus scheme.
(4) double-bus section wiring.Double bus scheme; can partition running; the degree of freedom of system constituted mode is large, and two elements can be received completely respectively on different buses, is favourable to large capacity and the system that need connect each other; because the one that this bus mode is conventional conventional art is extended; therefore aspect the means of relay protection and operation operation, can there is not problem, and be easier to the advantages such as realization enlarging stage by stage, but be vulnerable to the impact of busbar fault; the circuit of will stopping transport when overhaul of line breaker, floor space is larger.At present, generally, in the time that the Connection Element such as circuit, transformer sum is more than or equal to 10 times, the segmentation of bus list, in the time being more than or equal to 15 times, adopts the two section wirings of double-bus.
Utility model content
Technical problem to be solved in the utility model is to overcome the defect that above-mentioned prior art exists, the single busbar connection dual-breaker that a kind of pattern is simple, operation is flexible sectional wiring structure is provided, it can meet the requirement of system splitting operation, and electric component is fewer than double bus scheme.
For this reason, the technical solution adopted in the utility model is as follows: a kind of single busbar connection dual-breaker sectional wiring structure, comprise first paragraph bus, second segment bus, the first main transformer and the second main transformer, and it is characterized in that,
In the wire inlet loop access first paragraph bus of described the first main transformer, in the wire inlet loop access second segment bus of the second main transformer, on two sections of described buses, be respectively connected to multiple transmission line circuits;
Between two sections of described buses, be provided with the wire inlet loop of the 3rd main transformer, the wire inlet loop of the 3rd main transformer comprises the 3rd main transformer, two circuit breakers and multiple isolating switch, described circuit breaker is between two isolating switches, after two circuit breaker parallel connections, connect with the 3rd main transformer, two circuit breakers are connected on two sections of buses, and the 3rd main transformer is connected across between two sections of buses by two circuit breakers.
The utility model adopts single busbar connection dual-breaker section wiring, and when section breaker fault, two sections of buses fanout operation in short-term, can meet the requirement of electric power system off-the-line operation, and electric component is fewer than double bus scheme.The utility model can ensure any 1 section of busbar fault, and there are 2 main transformer power supplies in transformer station, improves power supply reliability.
As the further of technique scheme improved and supplemented, the utility model is taked following technical measures:
Described transmission line circuit comprises the multiple isolating switches and the circuit breaker that are cascaded, and described circuit breaker is between two isolating switches.
The wire inlet loop of described the first main transformer comprises the first main transformer being cascaded, multiple isolating switch and a circuit breaker, and described circuit breaker is between two isolating switches.
The wire inlet loop of described the second main transformer comprises the second main transformer being cascaded, multiple isolating switch and a circuit breaker, and described circuit breaker is between two isolating switches.
Described circuit breaker is isolated circuit breaker.Isolated circuit breaker (DCB) equipment, compared with traditional AIS (Air Insulated Switchgear) transformer station, it is by equipment such as circuit breaker, earthed switch, voltage transformer, current transformers, organically be combined into an entirety through optimal design, the advantage of DCB equipment is that floor space is little, and reliability is high, high safety, maintenance workload is little, and the maintenance intervals of its critical piece is not less than 20 years.
Described first paragraph bus and second segment bus are GIL bus.During as busbar fault of the present utility model, can make part line outage.Therefore the preferred GIL bus of bus of the present utility model, it is closed in bus in insulated pipe line, GIL bus height Integrated design and consummate manufacturing process, reliability aspect has obtained very large lifting, can realize 20 years non-maintaining, busbar fault probability reduces greatly.
The utility model is compared with double bus scheme structure, and the beneficial effect having is as follows: pattern is simple, and number of devices is identical with single female three section wirings, reduces to some extent than double-bus, and wiring is clear, is not easy to produce misoperation, has reduced human failure probability; The in the situation that of any element fault, the situation that the utility model all can not cause full station to have a power failure, and owing to not adopting bar coupler, fault mode is fewer than double-bus, and failure-frequency index is had to positive contribution; Each line of the present utility model is fixedly connected on a bus, calculate through trend, reasonably distribute line interval, make power line and load line pairing be connected to identical bus, loop of the same name is distributed on different buses, can meet equally the requirement of paired running and the fanout operation of system, and does not have grid switching operation, operate simpler, safe.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the utility model is described in further detail.
Single busbar connection dual-breaker sectional wiring structure as shown in Figure 1, in the wire inlet loop access first paragraph bus 4 of the first main transformer 1, in the wire inlet loop access second segment bus 5 of the second main transformer 2, on described first paragraph bus 4, be connected to transmission line circuit L1, L2 and L3, on second segment bus 5, be connected to transmission line circuit L4, L5 and L6.
Two sections of described buses 4, between 5, be provided with the wire inlet loop of the 3rd main transformer 3, the wire inlet loop of the 3rd main transformer 3 comprises the 3rd main transformer 3, two circuit breaker E8, E9 and three isolating switch S15, S16 and S17, circuit breaker E8 is between two isolating switch S15 and S17, circuit breaker E9 is between two isolating switch S16 and S17, two circuit breaker E8, after E9 parallel connection, connect with isolating switch S17 and the 3rd main transformer 3 again, two circuit breaker E8, E9 is connected to two sections of buses 4, on 5, the 3rd main transformer 3 is by two circuit breaker E8, E9 is connected across two sections of buses 4, between 5.
Described transmission line circuit L1 is made up of two isolating switch S1, the S2 and the circuit breaker E1 that are cascaded, and described circuit breaker E1 is between two isolating switch S1, S2.Described transmission line circuit L2 is made up of two isolating switch S3, the S4 and the circuit breaker E2 that are cascaded, and described circuit breaker E2 is between two isolating switch S3, S4.Described transmission line circuit L3 is made up of two isolating switch S5, the S6 and the circuit breaker E3 that are cascaded, and described circuit breaker E3 is between two isolating switch S5, S6.Described transmission line circuit L4 is made up of two isolating switch S7, the S8 and the circuit breaker E4 that are cascaded, and described circuit breaker E4 is between two isolating switch S7, S8.Described transmission line circuit L5 is made up of two isolating switch S9, the S10 and the circuit breaker E5 that are cascaded, and described circuit breaker E5 is between two isolating switch S9, S10.Described transmission line circuit L6 is made up of two isolating switch S11, the S12 and the circuit breaker E6 that are cascaded, and described circuit breaker E6 is between two isolating switch S11, S12.
The utility model circuit breaker used is isolated circuit breaker.Described first paragraph bus 4 and second segment bus 5 are GIL bus.
Below be only described with regard to the utility model preferred embodiment, but can not be interpreted as it is limitations on claims.The utility model is not only confined to above embodiment, and its concrete structure allows to change.All various variations of doing in the protection range of the utility model independent claims are all in protection range of the present utility model.

Claims (6)

1. a single busbar connection dual-breaker sectional wiring structure, comprises first paragraph bus, second segment bus, the first main transformer and the second main transformer, it is characterized in that,
In the wire inlet loop access first paragraph bus of described the first main transformer, in the wire inlet loop access second segment bus of the second main transformer, on two sections of described buses, be respectively connected to multiple transmission line circuits;
Between two sections of described buses, be provided with the wire inlet loop of the 3rd main transformer, the wire inlet loop of the 3rd main transformer comprises the 3rd main transformer, two circuit breakers and multiple isolating switch, described circuit breaker is between two isolating switches, after two circuit breaker parallel connections, connect with the 3rd main transformer, two circuit breakers are connected on two sections of buses, and the 3rd main transformer is connected across between two sections of buses by two circuit breakers.
2. single busbar connection dual-breaker sectional wiring structure according to claim 1, is characterized in that, described transmission line circuit comprises the multiple isolating switches and the circuit breaker that are cascaded, and described circuit breaker is between two isolating switches.
3. single busbar connection dual-breaker sectional wiring structure according to claim 1, it is characterized in that, the wire inlet loop of described the first main transformer comprises the first main transformer being cascaded, multiple isolating switch and a circuit breaker, and described circuit breaker is between two isolating switches.
4. single busbar connection dual-breaker sectional wiring structure according to claim 1, it is characterized in that, the wire inlet loop of described the second main transformer comprises the second main transformer being cascaded, multiple isolating switch and a circuit breaker, and described circuit breaker is between two isolating switches.
5. according to the single busbar connection dual-breaker sectional wiring structure described in claim 1-4 any one, it is characterized in that, described circuit breaker is isolated circuit breaker.
6. according to the single busbar connection dual-breaker sectional wiring structure described in claim 1-4 any one, it is characterized in that, described first paragraph bus and second segment bus are GIL bus.
CN201420384642.1U 2014-07-11 2014-07-11 A kind of single busbar connection dual-breaker sectional wiring structure Active CN203932698U (en)

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Application Number Priority Date Filing Date Title
CN201420384642.1U CN203932698U (en) 2014-07-11 2014-07-11 A kind of single busbar connection dual-breaker sectional wiring structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104167664A (en) * 2014-07-11 2014-11-26 国家电网公司 Single-bus dual-circuit breaker segmented wiring structure
CN111769451A (en) * 2020-07-28 2020-10-13 兖矿集团有限公司 Mine explosion-proof intelligent high-voltage complete set distribution device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104167664A (en) * 2014-07-11 2014-11-26 国家电网公司 Single-bus dual-circuit breaker segmented wiring structure
CN111769451A (en) * 2020-07-28 2020-10-13 兖矿集团有限公司 Mine explosion-proof intelligent high-voltage complete set distribution device

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C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: ZHEJIANG HUAYUN ELECTRIC POWER ENGINEERING DESIGN CONSULTATION Co.,Ltd.

Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHNICAL INSTITUTE

Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee before: State Grid Corporation of China

Patentee before: ZHEJIANG ZHEDIAN ECONOMIC TECHNOLOGY RESEARCH INSTITUTE CO.,LTD.

Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHNICAL INSTITUTE

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: ZHEJIANG ZHEDIAN ECONOMIC TECHNOLOGY RESEARCH INSTITUTE CO.,LTD.

Patentee after: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHNICAL INSTITUTE

Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee before: State Grid Corporation of China

Patentee before: ZHEJIANG ELECTRIC POWER ECONOMIC Research Institute

Patentee before: STATE GRID ZHEJIANG ELECTRIC POWER COMPANY ECONOMIC TECHNICAL INSTITUTE