CN204290476U - Step down side segmentation road device prepared auto restart circuit - Google Patents
Step down side segmentation road device prepared auto restart circuit Download PDFInfo
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- CN204290476U CN204290476U CN201420834136.8U CN201420834136U CN204290476U CN 204290476 U CN204290476 U CN 204290476U CN 201420834136 U CN201420834136 U CN 201420834136U CN 204290476 U CN204290476 U CN 204290476U
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- 230000004048 modification Effects 0.000 description 2
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Abstract
Step down side segmentation road described in the utility model device prepared auto restart circuit, comprise low pressure I section of bus, low pressure II section of bus, middle pressure I section of bus, middle pressure II section of bus, the transformer one be connected with low pressure I section of bus, the transformer two be connected with low pressure II section of bus, the voltage device five be connected with middle pressure I section of bus, the transformer six be connected with middle pressure II section of bus; Low pressure I section of bus is connected through the first circuit breaker, main transformer one, first current transformer group, the second circuit breaker and middle pressure I section of bus successively, and low pressure II section of bus is connected through the 3rd circuit breaker, main transformer two, second current transformer group, the 4th circuit breaker and middle pressure II section of bus successively.Step down side segmentation road described in the utility model device prepared auto restart circuit, after the intelligent decision to distributed electrical source operating mode, operational mode, the action logic of prepared auto restart can adapt to automatically, improve the speed of the switchover operation of distributed power supply system, and safety and flexibility.
Description
Technical field
The utility model relates to electrical power trans mission/distribution system technical field, specifically relates to step down side segmentation road device prepared auto restart circuit.
Background technology
In electric power system, because after fault or other reason working power disconnect, stand-by power supply, stand-by equipment or other power supplys are automatically promptly devoted oneself to work, make the automatic control equipment that user can restore electricity as early as possible, be called for short backup auto-activating device.Adopt backup auto-activating device can improve power supply reliability, simplify relay protection scheme, limiting short-circuit current improve bus residual voltage, utilize backup auto-activating device to improve development trend that power supply reliability is electrical network.But the prepared auto restart circuit of current described employing is when for accessing substation low-voltage side, the QA requirement of prepared auto restart can not be met; After the tripping of main power supply fault, because small power supply supporting bus voltage is having more than compression set value or between having between compression set value and definite value with no pressure, so prepared auto restart can not quick acting; When busbar voltage is lower than definite value with no pressure, extension wire switch can close a floodgate by backup auto-activating device, can increase the weight of small power supply load, when causing busbar voltage or frequency to occur abnormal.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of step down side segmentation road device prepared auto restart circuit that power supply also drops into automatically that can fast, accurately judge.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
Step down side segmentation road device prepared auto restart circuit, comprise low pressure I section of bus, low pressure II section of bus, middle pressure I section of bus, middle pressure II section of bus, the transformer one be connected with low pressure I section of bus, the transformer two be connected with low pressure II section of bus, the voltage device five be connected with middle pressure I section of bus, the transformer six be connected with middle pressure II section of bus; The power line that described low pressure I section of bus is drawn is connected through the first circuit breaker, main transformer one, first current transformer group, the second circuit breaker and middle pressure I section of bus successively, and the power line that described low pressure II section of bus is drawn is connected through the 3rd circuit breaker, main transformer two, second current transformer group, the 4th circuit breaker and middle pressure II section of bus successively; Be connected by the 5th circuit breaker between described low pressure I section of bus and low pressure II section of bus, be connected by the 6th circuit breaker between described middle pressure I section of bus and middle pressure II section of bus; Described middle pressure I section of bus and middle pressure II section of bus bar side are serially connected with multiple load circuit respectively.
Described load circuit is all connected with middle pressure II section of bus by circuit breaker and middle pressure I section of bus, is also serially connected with the 3rd current transformer group between described middle pressure I section of bus and middle pressure II section of bus.
The beneficial effects of the utility model are: step down side segmentation road described in the utility model device prepared auto restart circuit, after the intelligent decision to distributed electrical source operating mode, operational mode, the action logic of prepared auto restart can adapt to automatically, improve the speed of the switchover operation of distributed power supply system, and safety and flexibility.Only need changing a little the backup auto-activating device mode of connection in prepared auto restart circuit, after prepared auto restart action can be realized, only excise distributed power source circuit, and do not excise feedback for circuit by mistake, no longer cause power failure range to expand.And the circuit breaker position of all distributed power sources is all given access backup auto-activating device in parallel by the utility model, changes the circuit breaker position contact of original access backup auto-activating device into normally closed contact by normally opened contact.When distributed power source circuit constantly accesses electric power system, to not need to carry out logic Modification, program upgrade to original backup auto-activating device, do not need to change corresponding on-the-spot secondary connection again, reduce unnecessary power failure, checking and accepting, save the operating cost of electric power enterprise, reduce the risk of power network safety operation.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, step down side segmentation road device prepared auto restart circuit, comprise low pressure I section of bus, low pressure II section of bus, middle pressure I section of bus, middle pressure II section of bus, transformer one UX1 be connected with low pressure I section of bus, transformer two UX2 be connected with low pressure II section of bus, voltage device five PT1 be connected with middle pressure I section of bus, transformer six PT2 that is connected with middle pressure II section of bus; The power line that described low pressure I section of bus is drawn is connected through the first circuit breaker Q S1, main transformer one UX3, the first current transformer group TA1, the second circuit breaker Q S2 and middle pressure I section of bus successively, and the power line that described low pressure II section of bus is drawn is connected through the 3rd circuit breaker Q S3, main transformer two UX4, the second current transformer group TA2, the 4th circuit breaker Q S4 and middle pressure II section of bus successively; Be connected by the 5th circuit breaker Q S5 between described low pressure I section of bus and low pressure II section of bus, be connected by the 6th circuit breaker Q S6 between middle pressure I section of bus and middle pressure II section of bus; Middle pressure I section of bus and middle pressure II section of bus bar side are serially connected with multiple load circuit 9 respectively, and this load circuit 9 can be small power station's circuit or other load circuits.This load circuit 9 is all connected with middle pressure II section of bus by circuit breaker and middle pressure I section of bus, is also serially connected with the 3rd current transformer group TA3 between middle pressure I section of bus and middle pressure II section of bus.
Operation principle: by reaction profile formula power circuit breaker position parallel connection access backup auto-activating device, wherein circuit breaker position opens the normally closed contact into taking from backup auto-activating device; Two pairs of normally closed contacts of the real-time generating state of distributed power source will can be reflected in each circuit, wherein this line-breaker position judgment loop in pair of series access backup auto-activating device, other a pair normally closed contact seals in company corresponding in backup auto-activating device and cuts in trip(ping) circuit; When main transformer one UX3 fault, main protection action second circuit breaker Q S2 trips, main transformer one UX3 high-pressure side decompression, pressure I section bus, the equal decompression of middle pressure II section bus then, first current transformer group TA1 no current, then disconnected first circuit breaker QS1, the second circuit breaker Q S2, and be connected to middle pressure I section bus, circuit breaker between middle pressure II section bus and load circuit, and closed 3rd circuit breaker Q S3, the 4th circuit breaker Q S4, powered by main transformer two; When main transformer two UX4 fault; its main protection action the 4th circuit breaker Q S4 trips; pressure I section, the equal decompression of middle pressure II section bus then; and the second current transformer TA2 no current; disconnect the 3rd circuit breaker Q S3, the 4th circuit breaker Q S4 and and be connected to and middlely press I section, circuit breaker between middle pressure II section bus and load circuit; and closed main transformer one UX3, powered by main transformer one UX3.
Step down side segmentation road described in the utility model device prepared auto restart circuit, after the intelligent decision to distributed electrical source operating mode, operational mode, the action logic of prepared auto restart can adapt to automatically, improve the speed of the switchover operation of distributed power supply system, and safety and flexibility.Only need changing a little the backup auto-activating device mode of connection in prepared auto restart circuit, after prepared auto restart action can be realized, only excise distributed power source circuit, and do not excise feedback for circuit by mistake, no longer cause power failure range to expand.And the circuit breaker position of all distributed power sources is all given access backup auto-activating device in parallel by the utility model, changes the circuit breaker position contact of original access backup auto-activating device into normally closed contact by normally opened contact.When distributed power source circuit constantly accesses electric power system, to not need to carry out logic Modification, program upgrade to original backup auto-activating device, do not need to change corresponding on-the-spot secondary connection again, reduce unnecessary power failure, checking and accepting, save the operating cost of electric power enterprise, reduce the risk of power network safety operation.
Those skilled in the art will be appreciated that; above execution mode is only used to the utility model is described; and be not used as restriction of the present utility model; as long as within spirit of the present utility model, the appropriate change do above embodiment and change all drop within the claimed scope of the utility model.
Claims (2)
1. step down side segmentation road device prepared auto restart circuit, it is characterized in that: comprise low pressure I section of bus, low pressure II section of bus, middle pressure I section of bus, middle pressure II section of bus, the transformer one (UX1) be connected with low pressure I section of bus, the transformer two (UX2) be connected with low pressure II section of bus, the voltage device five (PT1) be connected with middle pressure I section of bus, the transformer six (PT2) be connected with middle pressure II section of bus; The power line that described low pressure I section of bus is drawn is connected through the first circuit breaker (QS1), main transformer one (UX3), the first current transformer group (TA1), the second circuit breaker (QS2) and middle pressure I section of bus successively, and the power line that described low pressure II section of bus is drawn is connected through the 3rd circuit breaker (QS3), main transformer two (UX4), the second current transformer group (TA2), the 4th circuit breaker (QS4) and middle pressure II section of bus successively; Be connected by the 5th circuit breaker (QS5) between described low pressure I section of bus and low pressure II section of bus, be connected by the 6th circuit breaker (QS6) between described middle pressure I section of bus and middle pressure II section of bus; Described middle pressure I section of bus and middle pressure II section of bus bar side are serially connected with multiple load circuit (9) respectively.
2. step down side segmentation road according to claim 1 device prepared auto restart circuit, it is characterized in that: described load circuit (9) is all connected with middle pressure II section of bus by circuit breaker and middle pressure I section of bus, is also serially connected with the 3rd current transformer group (TA3) between described middle pressure I section of bus and middle pressure II section of bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420834136.8U CN204290476U (en) | 2014-12-25 | 2014-12-25 | Step down side segmentation road device prepared auto restart circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420834136.8U CN204290476U (en) | 2014-12-25 | 2014-12-25 | Step down side segmentation road device prepared auto restart circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204290476U true CN204290476U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420834136.8U Expired - Fee Related CN204290476U (en) | 2014-12-25 | 2014-12-25 | Step down side segmentation road device prepared auto restart circuit |
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| Country | Link |
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| CN (1) | CN204290476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578386A (en) * | 2014-12-25 | 2015-04-29 | 国家电网公司 | Automatic bus transfer circuit and method for transformer low-voltage side section breakers |
-
2014
- 2014-12-25 CN CN201420834136.8U patent/CN204290476U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578386A (en) * | 2014-12-25 | 2015-04-29 | 国家电网公司 | Automatic bus transfer circuit and method for transformer low-voltage side section breakers |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20181225 |