CN204465015U - Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line - Google Patents
Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line Download PDFInfo
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- CN204465015U CN204465015U CN201520150511.1U CN201520150511U CN204465015U CN 204465015 U CN204465015 U CN 204465015U CN 201520150511 U CN201520150511 U CN 201520150511U CN 204465015 U CN204465015 U CN 204465015U
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Abstract
The utility model discloses when a kind of power plant list returns back out line without the need to drawing the wiring system of power supply outward, comprise HV Auxiliary Transformer (1), generator outlet circuit breaker (2), generator (3), main transformer (4), described generator (3) outlet is connected with generator outlet circuit breaker (2), described HV Auxiliary Transformer (1) is drawn to connect and is arranged between generator outlet circuit breaker (2) and main transformer (4), and the generating set belonging to described generator (3) can carry out island operation method.Without the need to the wiring system that the draws power supply outward power plant for only having 1 to return back out line when power plant list in the utility model returns back out line, solve in traditional scheme, this type of power plant need arrange special shutdown/spare transformer, draw separately from factory and connect high voltage source, and the problem of great number electrical capacity charge need be paid every year, described generator outlet circuit breaker is arranged on generator outlet, for generator being dropped into electrical network or excising from electrical network, do not affect other unit normal power generation, after generating set and grid disconnection, the generator unit possessing island operation method ability can from house load operation, without the need to external service power for subsequent use.
Description
Technical field
The utility model relates to a kind of setting of electrical power plant source, specifically a kind of vibrational power flow mode for only having 1 to return back out the power plant service power for subsequent use of line.
Background technology
Drawing of power plant stand-by power supply scoops out its independence of guarantee, and has enough power supply capacities, and general and electric power system is closely connected, in power cut of whole factory situation, still can obtain service power from system as early as possible.In traditional scheme, this type of power plant need arrange special shutdown/spare transformer, and when only having 1 to return back out line, conventional scheme all need draw separately and connects high voltage source from factory, and arranges for subsequent use service power of dedicated backup transformer as power plant.This scheme builds ultra-high-tension power transmission line separately in factory's external demand, and factory's domestic demand arranges dedicated transformer, also must pay great number electrical capacity charge to electrical network every year in addition.
Calculate according to domestic comparatively general expenses standard at present, the electrical capacity charge that 300MW grade unit generation factory pays every year is at about 1,000 ten thousand yuan; The electrical capacity charge that 600MW grade unit generation factory pays every year is at about 1,500 ten thousand yuan; The electrical capacity charge that 1000MW grade unit generation factory pays every year is at about 1,800 ten thousand yuan.Electrical capacity charge becomes the huge cost in one, power plant.
Summary of the invention
For now at present Problems existing and deficiency, without the need to drawing the wiring system of power supply outward when providing a kind of power plant list to return back out line, concrete technical scheme is as follows:
Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line, comprise HV Auxiliary Transformer 1, generator outlet circuit breaker 2, generator 3, main transformer 4, described generator 3 outlet is connected with generator outlet circuit breaker 2, described HV Auxiliary Transformer 1 is drawn to connect and is arranged between generator outlet circuit breaker 2 and main transformer 4, and belonging to described generator 3, generating set can carry out island operation method.
Alternately, without the need to drawing the wiring system of power supply outward when above-mentioned a kind of power plant list returns back out line, the group number that described generator 3 connects main transformer 4 is two groups or more than two, and described generator 3 connects between main transformer 4 groups and is arranged in parallel.
Alternately, without the need to drawing the wiring system of power supply outward when above-mentioned a kind of power plant list returns back out line, the low-pressure side bus of two HV Auxiliary Transformer 1 is interconnected, and every platform HV Auxiliary Transformer 1 all can be used as the shutdown stand-by power supply of another generator 3 unit.
Alternately, without the need to drawing the wiring system of power supply outward when above-mentioned a kind of power plant list returns back out line, every platform generator 3 all connects a generator outlet circuit breaker 2, main transformer 4, HV Auxiliary Transformer 1.
Alternately, without the need to drawing the wiring system of power supply outward when above-mentioned a kind of power plant list returns back out line, the opposite side of described main transformer 4 connects booster stations 5 in power plant.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
Without the need to drawing the wiring system of power supply outward when power plant list in the utility model returns back out line, described generator outlet circuit breaker is arranged on generator outlet, compare traditional scheme, in power generation process during line failure, booster stations circuit breaker can directly by generator from electrical network open circuit off-the-line, generating set is still powered to HV Auxiliary Transformer by island operation method, ensures that station-service shuts down the stable power-supplying of power supply on the one hand, and without the need to arranging stand-by power supply; When certain unit steam turbine, boiler, generator failure need be shut down, generator outlet circuit breaker can be disconnected, now shut down unit HV Auxiliary Transformer and can obtain stand-by power supply from system or another unit; When certain set generator-transformer group fault, booster stations side primary cut-out can be stopped, obtain shutdown power supply from another unit; In addition, if the reliability caused when considering certain unit HV Auxiliary Transformer maintenance reduces, then the HV Auxiliary Transformer of a not wiring can be established again.On the other hand, after generating set and grid disconnection, generating set can from house load operation, and generating equipment such as boiler etc. still can continuous service, for the equipment of inside, power plant is powered, does not affect other unit normal power generation.Can be grid-connected immediately by generating set after failure removal, decrease the plenty of time and expense of shutting down and again open needed for machine.Do not need in the utility model to arrange special shutdown/spare transformer, do not draw separately from factory and connect high voltage source, saved the problem paying great number electrical capacity charge every year.It also avoid when booster stations electric pressure is 750kV or 1000kV, draw outside factory and connect power supply and station service electrical system phase angle difference is excessive, and cause the problem that station service cannot switch.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the wiring system structural representation drawing power supply outside traditional power plants;
Fig. 2 is without the need to drawing the wiring system of power supply outward when in the utility model, a kind of power plant list returns back out line.
Reference numeral: 1 be HV Auxiliary Transformer, 2 be generator outlet circuit breaker, 3 be generator, 4 be main transformer, 5 for booster stations, 6 in power plant be outlet, 7 for the outer high-voltage power-line of factory, 8 be special shutdown/spare transformer.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
As shown in Figure 1, in traditional scheme, power plant need arrange dedicated backup transformer 8, is drawn separately connect high voltage source by high-voltage power-line outside factory 7 from factory, provides electric power for the equipment in power plant runs.Meanwhile, due to fault, generating is not sent not go out, and generating set then must be out of service.
Without the need to drawing the wiring system of power supply outward when the utility model provides a kind of power plant list to return back out line, the power plant returning back out line for only having 1.Solve in traditional scheme, this type of power plant need arrange dedicated backup transformer 8, draws separately the problem connecing high voltage source from factory.As shown in Figure 2, without the need to drawing the wiring system of power supply outward when in this programme, a kind of power plant list returns back out line, comprise HV Auxiliary Transformer 1, generator outlet circuit breaker 2, generator 3, the outlet of described generator 3 is connected with generator outlet circuit breaker 2, and described HV Auxiliary Transformer 1 is drawn to connect and is arranged between generator outlet circuit breaker 2 and main transformer 4.Described generator outlet circuit breaker 2 opposite side connects main transformer 4.The opposite side of described main transformer 4 connects booster stations 5 in power plant, and in described power plant, booster stations 5 are by outlet 6 outwards output power.The group number of described generator 3-main transformer 4 groups is two groups or more than two, is arranged in parallel between described generator 3-main transformer 4 groups.Every platform generator 3 all connects a generator outlet circuit breaker 2, main transformer 4, HV Auxiliary Transformer 1.The low-pressure side bus of two HV Auxiliary Transformer 1 is interconnected, and every platform HV Auxiliary Transformer 1 all can be used as the shutdown stand-by power supply of another generator 3 unit.Belonging to described generator 3, generating set can carry out island operation method.
Described generator outlet circuit breaker 2 is arranged on generator 3 and exports, and for generator 2 being dropped into electrical network or excising from electrical network, described HV Auxiliary Transformer 1 is arranged between generator 3, main transformer 4.At accident condition; disconnect generator outlet circuit breaker 2; after generator 3 and grid disconnection; generator 3 unit is still powered to HV Auxiliary Transformer 1 by island operation method; ensure the stable power-supplying of service power; and without the need to arranging special shutdown/stand-by power supply, can be grid-connected immediately by generating set after failure removal, decrease the plenty of time and expense of shutting down and again open needed for machine.
This programme comprises generator outlet circuit breaker and generating set island operation method.Described generating set island operation method refers to that generating set occurs accident at electrical network, and generating set and electrical network disconnect, and after generating set and grid disconnection, unit can from house load operation.Island operation method operating mode is for ensureing power plant safety; unit can run under the operating mode of carrying power plant electricity consumption, and steam turbine gets rid of unnecessary load, controls steam inlet continuous service; without the need to stopping boiler operatiopn, also without the need to by the external station-service high-voltage power-line of special shutdown/spare transformer.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (5)
1. without the need to drawing the wiring system of power supply outward when a power plant list returns back out line, comprise HV Auxiliary Transformer (1), generator outlet circuit breaker (2), generator (3), main transformer (4), it is characterized in that: described generator (3) outlet is connected with generator outlet circuit breaker (2), described HV Auxiliary Transformer (1) is drawn to connect and is arranged between generator outlet circuit breaker (2) and main transformer (4), and belonging to described generator (3), generating set can carry out island operation method.
2. without the need to drawing the wiring system of power supply outward when a kind of power plant as claimed in claim 1 list returns back out line, it is characterized in that: the group number that described generator (3) connects main transformer (4) is two groups or more than two, described generator (3) connects between main transformer (4) group and is arranged in parallel.
3. without the need to drawing the wiring system of power supply outward when a kind of power plant as claimed in claim 2 list returns back out line; it is characterized in that: the low-pressure side bus of two HV Auxiliary Transformer (1) is interconnected, every platform HV Auxiliary Transformer (1) all can be used as the shutdown stand-by power supply of another generator (3) unit.
4. without the need to drawing the wiring system of power supply outward when a kind of power plant as claimed in claim 1 list returns back out line, it is characterized in that: every platform generator (3) all connects a generator outlet circuit breaker (2), a main transformer (4), a HV Auxiliary Transformer (1).
5. without the need to drawing the wiring system of power supply outward when a kind of power plant as claimed in claim 1 list returns back out line, it is characterized in that: the opposite side of described main transformer (4) connects booster stations (5) in power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150511.1U CN204465015U (en) | 2015-03-17 | 2015-03-17 | Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150511.1U CN204465015U (en) | 2015-03-17 | 2015-03-17 | Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line |
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| CN204465015U true CN204465015U (en) | 2015-07-08 |
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| CN201520150511.1U Active CN204465015U (en) | 2015-03-17 | 2015-03-17 | Without the need to drawing the wiring system of power supply outward when a kind of power plant list returns back out line |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134387A (en) * | 2018-01-05 | 2018-06-08 | 中国电力工程顾问集团东北电力设计院有限公司 | A kind of novel unit service power fast switch over method |
| CN109672222A (en) * | 2018-12-26 | 2019-04-23 | 山东电力工程咨询院有限公司 | Grid-connected system and method based on two-shipper heat regenerative system with power-balance generator |
| CN113224750A (en) * | 2021-04-28 | 2021-08-06 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel high-voltage standby power supply leading method of gas-steam combined cycle power station |
-
2015
- 2015-03-17 CN CN201520150511.1U patent/CN204465015U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134387A (en) * | 2018-01-05 | 2018-06-08 | 中国电力工程顾问集团东北电力设计院有限公司 | A kind of novel unit service power fast switch over method |
| CN109672222A (en) * | 2018-12-26 | 2019-04-23 | 山东电力工程咨询院有限公司 | Grid-connected system and method based on two-shipper heat regenerative system with power-balance generator |
| CN113224750A (en) * | 2021-04-28 | 2021-08-06 | 中国能源建设集团广东省电力设计研究院有限公司 | Novel high-voltage standby power supply leading method of gas-steam combined cycle power station |
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