CN104218460A - 220kv side wiring structure of 500kv high capacity transformer station - Google Patents

220kv side wiring structure of 500kv high capacity transformer station Download PDF

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Publication number
CN104218460A
CN104218460A CN201410479787.4A CN201410479787A CN104218460A CN 104218460 A CN104218460 A CN 104218460A CN 201410479787 A CN201410479787 A CN 201410479787A CN 104218460 A CN104218460 A CN 104218460A
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China
Prior art keywords
bus
circuit breaker
transformer station
stand
large copacity
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Pending
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CN201410479787.4A
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Chinese (zh)
Inventor
陈荔
董仕镇
朱志芳
刘艳华
简翔浩
孔志达
周敏
陈丽萍
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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Priority to CN201410479787.4A priority Critical patent/CN104218460A/en
Publication of CN104218460A publication Critical patent/CN104218460A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a 220kv side wiring structure of a 500kv high capacity transformer station. The 220kv side wiring structure of the 500kv high capacity transformer station comprises a plurality of main transformers, a double bus and a line outgoing end, wherein one side of the double bus is connected with the main transformers through first disconnecting devices, the other side of the double bus is connected with the line outgoing end through a second disconnecting device, four third disconnecting devices are arranged on the double bus, the four third disconnecting devices are arranged in pairs in parallel mode so as to divide the double bus into three independent running units, and the three independent running units are arranged on the exterior of a power distribution unit site of the 500kv high capacity transformer station. The 220kv side wiring structure of the 500kv high capacity transformer station not only considers security and reliability of electricity supply for a load, but also considers running flexibility, and is small in occupied area, low in primary equipment investment and low in cost.

Description

The 220kv side joint line structure of 500kv Large Copacity transformer station
Technical field
The present invention relates to a kind of 220kv side joint line structure of 500kv Large Copacity transformer station.
Background technology
Along with the high speed development that installed capacity and each step voltage rack are built, 500kV grid structure strengthens greatly, defines the structure of looped network inside and outside double loop.But still have the electricity consumption of most of city to be tending towards nervous, the trend increased with workload demand amount forms contradiction.
Power grid construction and urban land contradiction increasingly outstanding, to such an extent as to some areas have occurred that substation planning site is difficult to the phenomenon implemented.In order to alleviate the demand of load, reducing the wastage, power supply being sent into load center district, the demand of building 500kV Large Copacity transformer station in load center district increases day by day.Usually the transformer station that final for transformer in station total capacity is greater than the conjunction station construction of 4000MVA is called Large Copacity transformer station.Wherein, that commonly uses has in the wiring of 330kV ~ 500kV high voltage distribution installation: double-bus three segmentation, band hospital bus bar or the wiring of band bypass isolating switch, bus scheme with one and half breaker, transformer-bus wiring etc.
In existing Large Copacity transformer station, such as, 500kV transformer station, its 220kV power distribution equipment is in systems in which for main loads is dissolved side, it is had higher requirement to 220kV side operational mode: electrical wiring requires not only reliable but also flexible, has both had the function of partition running, again can independent operating.
So the 220kV electrical wiring form that existing 500kV normal capacity transformer station commonly uses is two-membrane permeator form, is provided with special segmentation, bus.It is 3 ~ 4 that this connection type is usually used in the final scale of main transformer, and 220kV transmission line circuit number is 12 ~ 14 times.
The connection type that current 500kV transformer station 220kV side major part adopts is two-membrane permeator, it is provided with special segmentation, bus, being usually used in the final scale of main transformer is 3 ~ 4,220kV transmission line circuit number is 12 ~ 14 times, now main transformer, transmission line circuit all can be distributed on two sections of buses more fifty-fifty, main transformer load factor is also more balanced, and the element on every section of bus is no more than 10, runs enlarging convenient.
Above-mentioned two-membrane permeator form tool has the following advantages:
(1) reliability: one section of busbar fault, switched by bus, basic circuit can not be stopped transport.
(2) flexibility: for adjustment System trend, limiting short-circuit current are to prevent the reason of the aspects such as fault spread, when likely requiring bus fanout operation.Denominator or paired running is carried out according to system short-circuit current conditions.Under this connection type, the mode that in 500kV station, 220kV side generally adopts bus to indulge point carries out segmentation, and material is thus formed 2 stand-alone unit, each stand-alone unit all adopts double bus scheme.
(3) under same size, two-membrane permeator investment is little, and floor space is little.
And 6 groups of 1000MVA transformers are closed to the 500kV Large Copacity transformer station built at station, its 220kV side workload demand amount is very large, often 220kV transmission line circuit number is at 18 times or more, the two-membrane permeator form adopted if now still follow conventional lines, though main transformer and outlet thereof still can be distributed on two sections of buses, but after main transformer reaches final scale, bus section runs, easily cause main transformer utilance unbalanced, and 3 main transformers are positioned on same section of bus simultaneously, element on every section of bus is all more than 12, the element of power failure impact is many, in power failure, enlarging, in maintenance, operational mode is dumb.And the 500kV Large Copacity transformer station built at station is closed at 6 groups of 1000MVA transformers, be generally junction, 500kV side or be reserved with bus section position, 500kV service area at a specified future date can carry out subregion and to form a team power supply.And in the case, if 220kV still continues to use two female two section wiring, when carrying out paired running between adjacent 500kV service area, may cause standing interior main transformer load imbalance, and operational mode is dumb.
For bus scheme with one and half breaker, its tool has the following advantages:
(1) reliability: when overhauling and fault phase overlaps, the loop of stoppage in transit is no more than twice
(2) flexibility: for many rings are powered, dispatched flexibly.But a loop of stopping transport need operate two circuit breakers, and during busbar fault, in wiring, power flow changing is large; Isolating switch is only as maintenance electrical equipment, and not as controlling electric device, during accident settlement, with breaker operator, elimination accident is rapid.
(3) under same size, adopt conventional equipment, bus scheme with one and half breaker is that medium-sized three row of regular circuit breakers are arranged, interval can wire outlet at two sides, and floor space is little.
Although bus scheme with one and half breaker reliability is high, but cost is high, floor space is relatively large, cannot meet the load center district that land used is extremely nervous, when line reaches 8 loops, the investment of primary equipment has exceeded the investment of two-membrane permeator, and element is more, and the amplitude that investment exceedes is larger, so, transformer substation construction standard-required is high, and cost is high, is also unwell to 500kv Large Copacity transformer station.
Summary of the invention
Based on this, the invention reside in the defect overcoming prior art, a kind of 220kv side joint line structure dispatching 500kv Large Copacity transformer station flexible, with low cost is provided.
Its technical scheme is as follows: a kind of 220kv side joint line structure of 500kv Large Copacity transformer station, comprise multiple stage main transformer, double-bus, multiple leading-out terminal, multiple first disconnecting apparatus and multiple second disconnecting apparatus, every root bus of described double-bus is equipped with two the 3rd disconnecting apparatuss, four described 3rd disconnecting apparatuss are set up in parallel between two and described double-bus are divided into three stand-alone unit, three stand-alone unit are arranged in outside 500kV transformer substation power distribution unit place, each stand-alone unit is all connected to described main transformer by described first disconnecting apparatus, each stand-alone unit is also connected to described leading-out terminal by described second disconnecting apparatus.
Below further technical scheme is described:
Preferably, described first disconnecting apparatus comprises circuit breaker, isolating switch, described circuit breaker one end is connected with described main transformer by described isolating switch, and the described circuit breaker other end is connected with every root bus of described double-bus respectively by two described isolating switches; Described second disconnecting apparatus comprises circuit breaker, isolating switch, and described circuit breaker one end is connected with described leading-out terminal by described isolating switch, and every root bus of described double-bus is all connected by the other end of isolating switch with described circuit breaker.
Preferably, described first disconnecting apparatus comprises the first circuit breaker, the first isolating switch, described first circuit breaker one end is connected with described main transformer by described first isolating switch, and the described first circuit breaker other end is connected with every root bus of described double-bus respectively by two described first isolating switches; Described second disconnecting apparatus comprises the second circuit breaker, the second isolating switch, described second circuit breaker one end is connected with described leading-out terminal by described second isolating switch, and every root bus of described double-bus is all connected by the other end of the second isolating switch with described second circuit breaker.
Preferably, described 3rd disconnecting apparatus comprises the 3rd isolating switch and/or the 3rd circuit breaker.
Preferably, described 3rd disconnecting apparatus comprises the 3rd circuit breaker be arranged in series, two the 3rd isolating switches, and described 3rd circuit breaker is connected between two the 3rd isolating switches.
Preferably, described 500kV Large Copacity transformer station is formed by 6 groups of 1000MVA main transformers conjunction station construction.
Preferably, described double-bus is divided into three stand-alone unit.
Preferably, described main transformer has six, and each described stand-alone unit is connected with two described main transformers; Described leading-out terminal has 18, and each described stand-alone unit is connected with six described leading-out terminals.
Preferably, described main transformer has Shi Ertai, and each stand-alone unit is connected with four described main transformers.
Preferably, wireless connections interval is equipped with between two buses of each stand-alone unit, described wireless connections interval comprises the 4th circuit breaker, the 4th isolating switch, and the two ends of described 4th circuit breaker are connected to described two buses by described 4th isolating switch.
Below the principle, effect etc. of preceding solution are described:
Double-bus four the 3rd disconnecting apparatus segmentations of 220kV side in 500kV station of the present invention, formation can three stand-alone unit of independent operating, can run with the 220kV bus contact in adjacent service area respectively, form typical self-healing ring network structure, again can paired running between three stand-alone unit.Visible, under this Connection Mode, the load of the main transformer that each stand-alone unit is corresponding comparatively balances, and can improve the utilance of main transformer in Large Copacity transformer station, the stable operation of main transformer energy long-term safety.500kV service area carry out subregion form a team power supply time, this wiring patterns can also realize forming the wiring of double back chain type between adjacent 500kV service area.So, can the 220kV electrical network of service area centered by 500kV transformer station to dual-ring network or the transition of double back chain structure, 220kV side grid structure is more reliably firm.Visible, the 220kv side joint line structure of 500kv transformer station of the present invention both considered load is powered fail safe, reliability, consider again the flexibility of electric equipment operation, floor space is little, and primary equipment investment is little, with low cost.
Accompanying drawing explanation
Fig. 1 is the 220kv side joint line structure schematic diagram of 500kv transformer station described in the embodiment of the present invention;
Description of reference numerals:
10, the first disconnecting apparatus, the 20, second disconnecting apparatus, the 30, the 3rd disconnecting apparatus, 40, double-bus, the 51, first isolating switch, the 52, second isolating switch, 53, the 3rd isolating switch, the 54, the 4th isolating switch, the 61, first circuit breaker, 62, the second circuit breaker, 63, the 3rd circuit breaker, the 64, the 4th circuit breaker, 70, wireless connections interval, 80, main transformer, 90, leading-out terminal.
Embodiment
Below embodiments of the invention are described in detail:
As shown in Figure 1, the 220kv side joint line structure of 500kv Large Copacity transformer station of the present invention, comprise multiple stage main transformer 80, double-bus 40, leading-out terminal 90, described double-bus 40 side is connected with described main transformer 80 by the first disconnecting apparatus 10, the opposite side of described double-bus 40 is connected with described leading-out terminal 90 by the second disconnecting apparatus 20, described double-bus 40 is provided with four the 3rd disconnecting apparatuss 30, four described 3rd disconnecting apparatuss 30 are set up in parallel between two, namely every root bus is arranged two described 3rd disconnecting apparatuss 30, the 3rd disconnecting apparatus 30 wherein on a bus is corresponding to the 3rd disconnecting apparatus 30 position on another root bus, thus described double-bus 40 is divided into three can stand-alone unit, described three stand-alone unit are arranged in outside 500kV transformer substation power distribution unit place.
Double-bus 40 four the 3rd disconnecting apparatus 30 segmentations of 220kV side in 500kV station of the present invention, formation can three stand-alone unit of independent operating, can run with the 220kV bus contact in adjacent service area respectively, form typical self-healing ring network structure, again can paired running between three stand-alone unit.Visible, under this Connection Mode, the load of the main transformer that each stand-alone unit is corresponding comparatively balances, and can improve the utilance of main transformer 80 in Large Copacity transformer station, and main transformer 80 can long-term safety stable operation.500kV service area carry out subregion form a team power supply time, this wiring patterns can also realize forming the wiring of double back chain type between adjacent 500kV service area.So, can the 220kV electrical network of service area centered by 500kV transformer station to dual-ring network or the transition of double back chain structure, 220kV side grid structure is more reliably firm.Visible, the 220kv side joint line structure of 500kv transformer station of the present invention both considered load is powered fail safe, reliability, consider again the flexibility of operation, floor space is little, and primary equipment investment is little, with low cost.
In embodiments of the present invention, described first disconnecting apparatus 10 comprises the first circuit breaker 61, first isolating switch 51, described first circuit breaker 61 one end is connected with described main transformer 80 by described first isolating switch 51, and described first circuit breaker 61 other end is kept apart by two described first and is connected with every root bus of described double-bus 40 respectively; Described second disconnecting apparatus 20 comprises the second circuit breaker 62, second isolating switch 52, described second circuit breaker 62 one end is connected with described leading-out terminal 90 by described second isolating switch 52, and every root bus of described double-bus 40 is all connected by the other end of the second isolating switch 52 with described second circuit breaker 62.
Described 3rd disconnecting apparatus 30 comprises the 3rd isolating switch 53 and/or the 3rd circuit breaker 63.Wherein in an embodiment, described 3rd disconnecting apparatus 30 comprises the both sides that the 3rd circuit breaker 63, two the 3rd isolating switches 53, two described 3rd isolating switches 53 be arranged in series are positioned at described 3rd circuit breaker 63, and is connected with double-bus 40 respectively.
Described 500kV Large Copacity transformer station closes station construction by 6 groups of 1000MVA main transformers and forms.Described double-bus 40 is divided into independently three stand-alone unit.Described main transformer 80 has six, is distributed on three described stand-alone unit; Described leading-out terminal 90 has 18, is distributed on three described stand-alone unit.Or described main transformer 80 has Shi Ertai, uniform four main transformers 80 of each stand-alone unit.
The power distribution equipment of described 500kV transformer station adopts Mixed gas insulation equipment.Wireless connections interval 70 is equipped with between two buses of each stand-alone unit, described wireless connections interval 70 comprises the 4th circuit breaker 64, the 4th isolating switch 54, and the two ends of described 4th circuit breaker 64 are connected to described two buses by described 4th isolating switch 54.
To sum up, the 220kv side joint line structure of 500kV Large Copacity transformer station of the present invention has the advantage of the following aspects:
1, under same size, when adopting unit equipment, the floor space that the arrangement form of double-bus 40 4 section wiring compares half breaker 60 wiring patterns about reduces by 6000 square meters, reduce land expropriation cost 3,600,000 (by 400,000 yuan/mu), and the area of floor space and double-bus 40 pairs of section wirings of double-bus 40 4 section wiring arrangement form is approximately identical.
2, double-bus 40 of the present invention adopts six main transformer 18 outlet structures, when one section of busbar fault, and the double faults of wherein a set of segmentation or bus 60 tripping, can fault of stop bus, by switching, circuit can not be stopped transport substantially, but this double faults probability is few.And six main transformer 18 outlet structure relate to 24 elements, after four segmentations, each segmentation eight elements, one section of bus even if fault is stopped transport, its impact scope less.But for double-bus 40 pairs of section wiring forms, under equal failure condition, one section of busbar fault, the double faults of segmentation or bus 60 tripping, one section of bus of stopping transport, namely 4 ~ 8 loops have a power failure, and power failure range is larger.
The above embodiment only have expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (9)

1. the 220kv side joint line structure of a 500kv Large Copacity transformer station, it is characterized in that, comprise multiple stage main transformer, double-bus, multiple leading-out terminal, multiple first disconnecting apparatus and multiple second disconnecting apparatus, every root bus of described double-bus is equipped with two the 3rd disconnecting apparatuss, four described 3rd disconnecting apparatuss are set up in parallel between two and described double-bus are divided into three stand-alone unit, three stand-alone unit are arranged in outside 500kV transformer substation power distribution unit place, each stand-alone unit is all connected to described main transformer by described first disconnecting apparatus, each stand-alone unit is also connected to described leading-out terminal by described second disconnecting apparatus.
2. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 1, it is characterized in that, described first disconnecting apparatus comprises the first circuit breaker, the first isolating switch, described first circuit breaker one end is connected with described main transformer by described first isolating switch, and the described first circuit breaker other end is connected with every root bus of described double-bus respectively by two described first isolating switches; Described second disconnecting apparatus comprises the second circuit breaker, the second isolating switch, described second circuit breaker one end is connected with described leading-out terminal by described second isolating switch, and every root bus of described double-bus is all connected by the other end of the second isolating switch with described second circuit breaker.
3. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 1, is characterized in that, described 3rd disconnecting apparatus comprises the 3rd isolating switch and/or the 3rd circuit breaker.
4. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 1, it is characterized in that, described 3rd disconnecting apparatus comprises the 3rd circuit breaker be arranged in series, two the 3rd isolating switches, and described 3rd circuit breaker is connected between two the 3rd isolating switches.
5. the 220kv side joint line structure of the 500kv Large Copacity transformer station according to any one of Claims 1-4, is characterized in that, described 500kV Large Copacity transformer station closes station construction by 6 groups of 1000MVA main transformers and forms.
6. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 1, is characterized in that, described double-bus is divided into three stand-alone unit.
7. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 6, it is characterized in that, described main transformer has six, and each described stand-alone unit is connected with two described main transformers; Described leading-out terminal has 18, and each described stand-alone unit is connected with six described leading-out terminals.
8. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 6, it is characterized in that, described main transformer has Shi Ertai, and each stand-alone unit is connected with four described main transformers.
9. the 220kv side joint line structure of 500kv Large Copacity transformer station according to claim 1, it is characterized in that, wireless connections interval is equipped with between two buses of each stand-alone unit, described wireless connections interval comprises the 4th circuit breaker, the 4th isolating switch, and the two ends of described 4th circuit breaker are connected to described two buses by described 4th isolating switch.
CN201410479787.4A 2014-09-18 2014-09-18 220kv side wiring structure of 500kv high capacity transformer station Pending CN104218460A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105846439A (en) * 2016-05-10 2016-08-10 北京泰豪电力科技有限公司 Transformer economic operation adjusting method
CN109038248A (en) * 2018-09-20 2018-12-18 深圳供电规划设计院有限公司 A kind of wiring construction of substation low-voltage side
CN112653144A (en) * 2020-12-22 2021-04-13 深圳供电局有限公司 220kV transformer substation

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CN203367775U (en) * 2013-07-10 2013-12-25 浙江省电力设计院 Duplicate-busbar disconnecting switch segmented electric main connection wire
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CN204156314U (en) * 2014-09-18 2015-02-11 中国能源建设集团广东省电力设计研究院 The 220kv side joint line structure of 500kv Large Copacity transformer station

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Publication number Priority date Publication date Assignee Title
CN105846439A (en) * 2016-05-10 2016-08-10 北京泰豪电力科技有限公司 Transformer economic operation adjusting method
CN109038248A (en) * 2018-09-20 2018-12-18 深圳供电规划设计院有限公司 A kind of wiring construction of substation low-voltage side
CN112653144A (en) * 2020-12-22 2021-04-13 深圳供电局有限公司 220kV transformer substation
CN112653144B (en) * 2020-12-22 2023-06-09 深圳供电局有限公司 220kV transformer substation

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