CN203871919U - Fast switching system of power sources - Google Patents
Fast switching system of power sources Download PDFInfo
- Publication number
- CN203871919U CN203871919U CN201320817203.0U CN201320817203U CN203871919U CN 203871919 U CN203871919 U CN 203871919U CN 201320817203 U CN201320817203 U CN 201320817203U CN 203871919 U CN203871919 U CN 203871919U
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- bus
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- security personnel
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- 230000001360 synchronised effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Stand-By Power Supply Arrangements (AREA)
Abstract
Through utilization of functions of a logic circuit, voltage relays and low-voltage switches of a machine set control system, automatic switching of factory electric power security MCC section power sources is achieved, normal power supply of an important load is guaranteed, and a synchronizing device does not need to be installed. Furthermore, the fast switching system is low in cost and high in stability, hardware equipment in the system is less, and generating opportunities of faults are reduced. Reliability is high, the MCC power sources can be guaranteed to be switched rapidly and reliably, and the important load is guaranteed to not loss the power supply.
Description
Technical field
The utility model belongs to station service security personnel section power supply automatic control field.
Background technology
Station Service Electrical-Energy security personnel section provides emergency power supply for the oil system of steam turbine, the oil system of Important Auxiliary equipment, owing to there being emergency power supply, in the time there is the accident that station service loses, by a security personnel section quick power switching, can ensure that the load of each oil system can power-off.
In order to ensure the normal switching of security personnel's section power supply, kinds of schemes has been proposed, synchronous device is for example installed, realize the quick switching of working power and stand-by power supply.But the expense that synchronous device is installed is higher, and maintenance workload is large, needs to be reduced complexity and improve reliability.
Summary of the invention
The utility model is intended to overcome the problems referred to above in existing design, and object is in the situation that synchronous device not being installed, and realizes the quick switching of working power and stand-by power supply, and ensures important load normal power supply.The technical solution of the utility model comprises: a kind of quick power switching system comprises under-voltage replay and low tension switch, described under-voltage replay and low tension switch electrical connection.
Described low tension switch comprises 3 service entrance switchs of security personnel's MCC section BMB, with their 1 gates out switch of corresponding 3 mains switches and diesel engine generator respectively.
Described under-voltage replay is separately positioned in the PT cabinet of bus BFA and bus BFB, for the logical circuit transmitted signal to control system when the bus low-voltage, disconnects to the mains switch of security personnel MCC section power supply, realizes the interlocking of security personnel's section.
Described under-voltage replay is in 2 PT cabinets that are arranged on bus BFA or bus BFB.
Described under-voltage replay has 2 to be arranged in security personnel's MCC section bus PT cabinet, for the logical circuit transmitted signal to control system when the bus low-voltage, realizes security personnel's section interlocking and the self-starting that motor is sent a telegram here after short supply interruption.
The utility model, by utilizing the function of logical circuit, voltage relay and low tension switch of unit control system, has been realized station service security personnel MCC section power supply and has been automatically switched, and ensures that the power supply of important load is normal, does not need to install synchronous device.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Further illustrate the utility model below in conjunction with the drawings and specific embodiments.As Fig. 1 shows, station service security personnel section quick power switching system of the present utility model, logical circuit (not shown), under-voltage replay and low tension switch by unit control system form, do not comprising in synchronous device situation, controlling 7 switch motions of security personnel MCC section, security personnel's PC section and diesel engine generator.Security personnel MCC section is by 3 road Power supplies, respectively from BFA section, BFB section and unit security personnel PC section BMA, on the basis of the normal work of BFA section bus under-voltage replay, BFB section bus under-voltage replay, BMB bus under-voltage replay, the power supply of security personnel MCC is just in interlock connection, so must select the under-voltage replay of good quality, normal operation must ensure that under-voltage replay is working properly.What the G in Fig. 1 represented is diesel engine generator, and this diesel engine generator is powered to unit security personnel PC section BMA in the time of accident.
The utility model scheme relates to 7 switches altogether, and 7 described switches comprise 3 service entrance switchs of security personnel's MCC section BMB, with their 1 gates out switch of corresponding 3 mains switches and diesel engine generator respectively.Press layout shown in Fig. 1 and be connected, logical circuit, under-voltage replay and low tension switch in system link together, make in the time of BFA section dead electricity, bus low-voltage disconnects BFA06B switch automatically, after BFA06B switch trip, connection is jumped BMB01A switch, after BMB01A switch trip and security personnel's MCC bus low voltage signal occur, control system is from dynamic circuit connector BMB01B switch, security personnel MCC switches to by BFB section and powers.
If now also dead electricity of BFB section, BFB bus low-voltage disconnects BFB06B switch automatically, BMB01B switch cannot close a floodgate, BMB bus low voltage signal occurs, time delay 3 seconds, control system starts diesel engine generator automatically, diesel engine generator start normal after from dynamic circuit connector diesel engine generator gate out switch, control system is from dynamic circuit connector BMA04A switch, control system is from dynamic circuit connector BMA02A switch, now BFA06B, BMB01A, BFB06B, tetra-switches of BMB01B are all at gate-dividing state, BMB bus low voltage signal exists, control system is from dynamic circuit connector BMB09A switch, security personnel MCC switches to diesel engine generator power supply.
After BFA section, BFB section voltage recover normally, BFA06B, BFB06B manually close, manually stoppage in transit diesel engine generator, diesel engine generator gate out switch disconnects immediately, and control system disconnects BMA04A switch automatically, and control system disconnects BMA02A switch automatically, BMB09A switch connection is jumped, BMB01B switch is blocked combined floodgate because BFA06B switch closes a floodgate, and BMB01A switch combined floodgate condition meets automatic closing, and security personnel MCC switches to the power supply of BFA section.
Further, in BFA, BFB bus PT cabinet, 2 under-voltage replays are set respectively, for when the bus low-voltage to control system transmitted signal, disconnect to the mains switch of security personnel MCC section power supply, realize the interlocking of security personnel's section.In security personnel's MCC section bus PT cabinet, 2 under-voltage replays are also set, for when the bus low-voltage to control system transmitted signal, realize the self-starting that security personnel's section interlocking and the motor of 380V contactor control are sent a telegram here after short supply interruption.
The utility model, by utilizing the function of logical circuit, voltage relay and low tension switch of unit control system, has been realized station service security personnel MCC section power supply and has been automatically switched, and ensures that the power supply of important load is normal, does not need to install synchronous device.In addition, the utility model cost is low, and stability is high, and in system, hardware device is few, has reduced the chance that fault occurs.Reliability is high, can ensure security personnel's MCC power supply fast, reliably switch, ensure that important load can not lose power supply.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit above embodiment is carried out to multiple variation, amendment, replacement and modification, scope of the present utility model should not be subject to the restriction of specific embodiment, and is embodied in claim and is equal among restriction.
Claims (4)
1. a quick power switching system, it is characterized in that, comprise under-voltage replay and low tension switch, described under-voltage replay and low tension switch electrical connection, described low tension switch comprises 3 service entrance switchs of security personnel's MCC section BMB, with their 1 gates out switch of corresponding 3 mains switches and diesel engine generator respectively.
2. fast switching system as claimed in claim 1, is characterized in that, described under-voltage replay is separately positioned in the PT cabinet of bus BFA and bus BFB, for the logical circuit transmitted signal to control system when the bus low-voltage.
3. fast switching system as claimed in claim 2, is characterized in that, the described under-voltage replay being arranged in the PT cabinet of bus BFA or bus BFB is 2.
4. fast switching system as claimed in claim 1, is characterized in that, described under-voltage replay has 2 to be arranged in security personnel MCC section bus PT cabinet, for the logical circuit transmitted signal to control system when the bus low-voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817203.0U CN203871919U (en) | 2013-12-12 | 2013-12-12 | Fast switching system of power sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320817203.0U CN203871919U (en) | 2013-12-12 | 2013-12-12 | Fast switching system of power sources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203871919U true CN203871919U (en) | 2014-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320817203.0U Expired - Fee Related CN203871919U (en) | 2013-12-12 | 2013-12-12 | Fast switching system of power sources |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203871919U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362729A (en) * | 2014-10-15 | 2015-02-18 | 郑照 | Power supply switching device of safety guarantee system |
| CN105863745A (en) * | 2016-05-04 | 2016-08-17 | 大唐韩城第二发电有限责任公司 | Method for controlling combination jump steam turbine when outlet switches of grid connected generator-transformer set trip |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
-
2013
- 2013-12-12 CN CN201320817203.0U patent/CN203871919U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104362729A (en) * | 2014-10-15 | 2015-02-18 | 郑照 | Power supply switching device of safety guarantee system |
| CN105863745A (en) * | 2016-05-04 | 2016-08-17 | 大唐韩城第二发电有限责任公司 | Method for controlling combination jump steam turbine when outlet switches of grid connected generator-transformer set trip |
| CN108832641A (en) * | 2018-06-06 | 2018-11-16 | 三峡大学 | A kind of intelligent sub-controlling unit and control method of service power |
| CN108832641B (en) * | 2018-06-06 | 2021-05-14 | 三峡大学 | Intelligent auxiliary control device and control method for station service power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20151212 |
|
| EXPY | Termination of patent right or utility model |