CN204905673U - A station service wiring system for thermal power factory - Google Patents
A station service wiring system for thermal power factory Download PDFInfo
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- CN204905673U CN204905673U CN201520686857.3U CN201520686857U CN204905673U CN 204905673 U CN204905673 U CN 204905673U CN 201520686857 U CN201520686857 U CN 201520686857U CN 204905673 U CN204905673 U CN 204905673U
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Abstract
The utility model discloses a station service wiring system for thermal power factory, including a generating set G1, the 2nd generating set G2 and third power G3, a generating set G1 is connected with house work generating line D1 and house work generating line D2 respectively through first house transformer AT1, and the 2nd generating set G2 is connected with house work generating line D3 and house work generating line D4 respectively through second house transformer AT2, and third power G3 is connected with third power source bus D5 through the 3rd power transformer AT3, through two sets of generating set and the connection of a set of power, two sets of generating set each other are wiring system reserve and third way power and connect, through the method of operation of separating brake or combined floodgate isolator GA and isolator GB selection station service electrical system, switch flexibility, reliability height, and it has multiple mode of connection to have solved current thermal power station service electrical system, shut down the power and draw the not enough lower problem of reliability that reaches of mode flexibility that connects.
Description
[technical field]
The utility model belongs to field of thermal power, relates to a kind of auxiliary single-line diagram system for thermal power plant.
[background technology]
Thermal power plant production process converts chemical energy to electric energy to deliver to electrical network, can consume certain electric energy in thermal power plant self in generating simultaneously.In order to ensure that unit generates electricity smoothly and ensures unit safety reliability service, thermal power plant is configured with all kinds of subsidiary engine, and these subsidiary engines adopt electricity to drive mode mostly, and its power supply is provided by station service electrical system.The reliability of station service electrical system and flexibility are of great significance thermal power plant safety in production tool.
Thermal power plant station service electrical system has available for different connection modes; when unit installing generator circuit breaker, unit startup under normal circumstances and shut down power acquisition factory's inner high voltage power distribution equipment and deliver to middle pressure station-service working bus bar through main transformer, HV Auxiliary Transformer.Shutdown power supply in unit failure situation (as high-pressure system, main transformer or high factory accident barrier) draws the scheme of connecing 2 kinds usually: the first arranges a shutdown transformer in factory, its high side power is drawn by 110kV or 220kV system outside factory and connects, its low-pressure side is connected to middle pressure station-service working bus bar, there is provided shutdown power supply by shutting down change during unit failure, this shutdown power supply tapping form flexibility is not enough; The second is two unit height factory low pressure side station-service working bus bar handles, and two units shut down power supply each other, and this shutdown power supply tapping form reliability is lower.
[utility model content]
The purpose of this utility model is to overcome above-mentioned prior art shortcoming, provides a kind of auxiliary single-line diagram system for thermal power plant, improves unit station service electrical system reliability of operation and flexibility.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of auxiliary single-line diagram system for thermal power plant, comprise the first generating set G1, first station transformer AT1, second generating set G2, second station transformer AT2, 3rd power supply G3 and the 3rd power transformer AT3, first generating set G1 is connected with station-service working bus bar D2 with station-service working bus bar D1 respectively by the first station transformer AT1, second generating set G2 is connected with station-service working bus bar D4 with station-service working bus bar D3 respectively by the second station transformer AT2, 3rd power supply G3 is connected with the 3rd power source bus D5 by the 3rd power transformer AT3,
T-shape connection is carried out between described station-service working bus bar D1, station-service working bus bar D3 and the 3rd power source bus D5, station-service working bus bar D1, station-service working bus bar D3 and be respectively equipped with circuit breaker 1C, circuit breaker 2C and circuit breaker 3C between the 3rd power source bus D5 and T-shape node, be also provided with isolating switch GA between the 3rd power source bus D5 and T-shape node;
T-shape connection is carried out between described station-service working bus bar D2, station-service working bus bar D4 and the 3rd power source bus D5, station-service working bus bar D2, station-service working bus bar D4 and be respectively equipped with circuit breaker 1D, circuit breaker 2D and circuit breaker 3D between the 3rd power source bus D5 and T-shape node, be also provided with isolating switch GB between the 3rd power source bus D5 and T-shape node.
Further, be provided with circuit breaker 1A between described first station transformer AT1 and station-service working bus bar D1, between the first station transformer AT1 and station-service working bus bar D2, be provided with circuit breaker 1B; Be provided with circuit breaker 2A between described second station transformer AT2 and station-service working bus bar D3, between the second station transformer AT2 and station-service working bus bar D4, be provided with circuit breaker 2B; Circuit breaker 3A is provided with between described 3rd power transformer AT3 and the 3rd power source bus D5.
A kind of auxiliary single-line diagram system for thermal power plant of the present utility model, comprise the first generating set G1, first station transformer AT1, second generating set G2, second station transformer AT2, 3rd power supply G3 and the 3rd power transformer AT3, be connected with one group of power supply by two generators group, two generators group each other wiring system for subsequent use and three-way power connects, the operational mode of station service electrical system is selected by separating brake or combined floodgate isolating switch GA and isolating switch GB, switch flexibility, reliability is high, solve existing thermal power plant station service electrical system and have available for different connection modes, shut down the problem that the flexibility of power supply tapping form is not enough and reliability is lower.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to figure 1, the auxiliary single-line diagram system for thermal power plant of the present utility model comprises the first generating set G1, the first station transformer AT1, station-service working bus bar D1, station-service working bus bar D2, the second generating set G2, the second station transformer AT2, station-service working bus bar D3, station-service working bus bar D4, the 3rd power supply G3, the 3rd power transformer AT3, the 3rd power source bus D5;
The input of described first station transformer AT1 is connected with the first generating set G1, and the input of the second station transformer AT2 is connected with the second generating set G2, and the input of the 3rd power transformer AT3 is connected with the 3rd power supply G3;
The output terminals A of described first station transformer AT1 is connected with station-service working bus bar D1, and the output B of the first station transformer AT1 is connected with station-service working bus bar D2; The output terminals A of described second station transformer AT2 is connected with station-service working bus bar D3, and the output B of the second station transformer AT2 is connected with station-service working bus bar D4; The output of described 3rd power transformer AT3 is connected with the 3rd power source bus D5;
Be provided with circuit breaker 1A between described first station transformer AT1 and station-service working bus bar D1, between the first station transformer AT1 and station-service working bus bar D2, be provided with circuit breaker 1B; Be provided with circuit breaker 2A between described second station transformer AT2 and station-service working bus bar D3, between the second station transformer AT2 and station-service working bus bar D4, be provided with circuit breaker 2B; Circuit breaker 3A is provided with between described 3rd power transformer AT3 and the 3rd power source bus D5;
Carry out T-shape connection between described station-service working bus bar D1, station-service working bus bar D3 and the 3rd power source bus D5, and be provided with circuit breaker 1C, circuit breaker 2C and circuit breaker 3C successively, and isolating switch GA; Carry out T-shape connection between described station-service working bus bar D2, station-service working bus bar D4 and the 3rd power source bus D5, and be provided with circuit breaker 1D, circuit breaker 2D and circuit breaker 3D successively, and isolating switch GB.
It should be noted that, two-shipper described in the utility model each other wiring system execution mode for subsequent use and three-way power is the operational mode being selected station service electrical system by separating brake or combined floodgate isolating switch GA and isolating switch GB, specific as follows:
Isolating switch GA, isolating switch GB are at open position.When the first generating set G1 fault; working power branch circuit breaker 1A and 1B of station-service working bus bar D1 and station-service working bus bar D2 is jumped by switching device shifter; jump the non-accidental shutdown load that station-service working bus bar D1 and station-service working bus bar D2 connects simultaneously; close Accident power branch network interconnecting circuit 1C, 1D and 2C, 2D through time delay (delay time is adjustable), realize the second generating set G2 for the first generating set G1 and stand-by power supply is provided.Otherwise; when the second generating set G2 fault; working power branch circuit breaker 2A and 2B of station-service working bus bar D3 and station-service working bus bar D4 is jumped by switching device shifter; jump the non-accidental shutdown load that station-service working bus bar D3 and station-service working bus bar D4 connects simultaneously; close Accident power branch network interconnecting circuit 2C, 2D and 1C, 1D through time delay (delay time is adjustable), realize the first generating set G1 for the second generating set G2 and stand-by power supply is provided.
Isolating switch GA, isolating switch GB are at closing position.When the first generating set G1 fault; working power branch circuit breaker 1A and 1B of station-service working bus bar D1 and station-service working bus bar D2 is jumped by switching device shifter; jump the non-accidental shutdown load that station-service working bus bar D1 and station-service working bus bar D2 connects simultaneously; close corresponding section Accident power branch circuit breaker 1C, 1D and the 3rd power source bus D5 circuit breaker 3C, 3D through time delay (delay time is adjustable), realize the 3rd power supply for the first generating set G1 and stand-by power supply is provided.Otherwise; when the second generating set G2 fault; working power branch circuit breaker 2A and 2B of station-service working bus bar D3 and station-service working bus bar D4 is jumped by switching device shifter; jump the non-accidental shutdown load that station-service working bus bar D3 and station-service working bus bar D4 connects simultaneously; close corresponding section Accident power branch circuit breaker 2C, 2D and the 3rd power source bus D5 circuit breaker 3C, 3D through time delay (delay time is adjustable), realize the 3rd power supply for the second generating set G2 and stand-by power supply is provided.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model; can not assert that embodiment of the present utility model is only limitted to this; for the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made, all should be considered as belonging to the utility model by submitted to claims determination scope of patent protection.
Claims (2)
1. the auxiliary single-line diagram system for thermal power plant, it is characterized in that: comprise the first generating set G1, first station transformer AT1, second generating set G2, second station transformer AT2, 3rd power supply G3 and the 3rd power transformer AT3, first generating set G1 is connected with station-service working bus bar D2 with station-service working bus bar D1 respectively by the first station transformer AT1, second generating set G2 is connected with station-service working bus bar D4 with station-service working bus bar D3 respectively by the second station transformer AT2, 3rd power supply G3 is connected with the 3rd power source bus D5 by the 3rd power transformer AT3,
T-shape connection is carried out between described station-service working bus bar D1, station-service working bus bar D3 and the 3rd power source bus D5, station-service working bus bar D1, station-service working bus bar D3 and be respectively equipped with circuit breaker 1C, circuit breaker 2C and circuit breaker 3C between the 3rd power source bus D5 and T-shape node, be also provided with isolating switch GA between the 3rd power source bus D5 and T-shape node;
T-shape connection is carried out between described station-service working bus bar D2, station-service working bus bar D4 and the 3rd power source bus D5, station-service working bus bar D2, station-service working bus bar D4 and be respectively equipped with circuit breaker 1D, circuit breaker 2D and circuit breaker 3D between the 3rd power source bus D5 and T-shape node, be also provided with isolating switch GB between the 3rd power source bus D5 and T-shape node.
2. as claimed in claim 1 for the auxiliary single-line diagram system in thermal power plant, it is characterized in that: be provided with circuit breaker 1A between described first station transformer AT1 and station-service working bus bar D1, between the first station transformer AT1 and station-service working bus bar D2, be provided with circuit breaker 1B; Be provided with circuit breaker 2A between described second station transformer AT2 and station-service working bus bar D3, between the second station transformer AT2 and station-service working bus bar D4, be provided with circuit breaker 2B; Circuit breaker 3A is provided with between described 3rd power transformer AT3 and the 3rd power source bus D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520686857.3U CN204905673U (en) | 2015-09-07 | 2015-09-07 | A station service wiring system for thermal power factory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520686857.3U CN204905673U (en) | 2015-09-07 | 2015-09-07 | A station service wiring system for thermal power factory |
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| Publication Number | Publication Date |
|---|---|
| CN204905673U true CN204905673U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520686857.3U Active CN204905673U (en) | 2015-09-07 | 2015-09-07 | A station service wiring system for thermal power factory |
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| CN (1) | CN204905673U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849091A (en) * | 2017-03-24 | 2017-06-13 | 上海申能电力科技有限公司 | It is a kind of to realize novel system, method and application that electric energy conversion switches with motor |
| 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
- 2015-09-07 CN CN201520686857.3U patent/CN204905673U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849091A (en) * | 2017-03-24 | 2017-06-13 | 上海申能电力科技有限公司 | It is a kind of to realize novel system, method and application that electric energy conversion switches with motor |
| 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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