CN102868214A - utomatic standby power supply switching box in small water power station - Google Patents
utomatic standby power supply switching box in small water power station Download PDFInfo
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- CN102868214A CN102868214A CN2012103442137A CN201210344213A CN102868214A CN 102868214 A CN102868214 A CN 102868214A CN 2012103442137 A CN2012103442137 A CN 2012103442137A CN 201210344213 A CN201210344213 A CN 201210344213A CN 102868214 A CN102868214 A CN 102868214A
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- power supply
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- phase line
- contactor
- power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Control Of Eletrric Generators (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to an automatic standby power supply switching box in a small water power station. An online power supply and a generator end power supply can provide a working power supply for auxiliary equipment of a water-turbine generator set by three buses. The automatic standby power supply switching box in the small water power station is a dual power supply commutation circuit which is mainly composed of a voltage relay, a power-on time-delay relay and a power-off time-delay relay, when the online power supply is in failure, the power-on time-delay relay and the power-off time-delay relay are set to be 0.2-0.5s, and the end power supply of a generator is automatically switched; and when the online power supply recoveries, automatic standby power supply switching box in the small water power station is automatically switched from the end power supply of the generator into the online power supply, the uninterrupted power supply is provided for the auxiliary equipment of the water-turbine generator set, and a water-turbine generator set can normally carry out different operations. The device provided by the invention has the characteristics that the investment is low, the installation is simple, the practicality is convenient, and the switching of the power supply is automatically performed.
Description
Technical field
The present invention relates to double-power supply switching device, particularly the online power supply in hydroelectric station and generator end automatic power-supply switch.
Background technology
Existing domestic big-and-middle-sized power station; the stand-by power supply protection is fairly perfect; and small power station in rural often installed capacity is little; online power supply (being the transformer substation system power supply) or machine end power supply are adopted in most of small hydropower station protection electricity consumptions mostly; when online dead electricity or machine end fault (the particularly higher equipment of automation degree of protection); will lose protection power source, cause larger harm if process untimely meeting.
Summary of the invention
The purpose of this invention is to provide the automatic cross box of a kind of small hydropower station stand-by power supply, when online power generation fault, drop into fast the generator end power supply, when online power up, fast shut-off generator end power supply.
The object of the present invention is achieved like this: the automatic cross box of a kind of small hydropower station stand-by power supply, three phase line A that comprise the online power supply of 380V, B and C respectively with three bus AO, BO is connected with CO, three phase line A1 of 380V generator end power supply, B1 and C1 respectively with as three bus AO to hydraulic turbine generator group auxiliary equipment power supply, BO is connected with CO, it is characterized in that, be serially connected with voltage relay KV between described phase line A and the center line N, phase line A1 is connected in series the first normally closed interlock KV1 of voltage relay KV in turn, be connected to center line N behind the second normally closed interlock KV2 and the first contactor 1JC, energization delay relay 1KT one is terminated at the node of the first normally closed interlock KV1 and the second normally closed interlock KV2, and the energization delay relay 1KT other end is connected to center line N; One of the normally open contact 1KT2 of energization delay relay 1KT is terminated at energization delay relay 1KT one end, the other end of the normally open contact 1KT2 of energization delay relay 1KT is connected to center line N after being connected in series the second contactor 2JC, power-off delay relay 2KT is in parallel with the second contactor 2JC, one of the normally opened contact KT2 of power-off delay relay 2KT is terminated at phase line A1, and the other end of the normally opened contact KT2 of power-off delay relay 2KT is connected to the node of the second normally closed interlock KV3 and the first contactor 1JC; Three normally closed interlock 1JC1 of above-mentioned the first contactor 1JC are connected between three phase line A, B of described online power supply and C and three bus AO, BO and the CO; Three normally open contacts of above-mentioned the second contactor 2JC are connected between three phase line A1, B1 of described generator end power supply and C1 and three bus AO, BO and the CO.
Also be connected with resistance R between above-mentioned voltage relay KV and the phase line A.
Be serially connected with another normally closed interlock 1JC2 and the online power supply indicator of the first contactor 1JC between the phase line A of above-mentioned online power supply and the phase line C; Be serially connected with another normally open contact 2JC2 and the machine end power supply indicator of the second contactor 2JC between the phase line A1 of described generator end power supply and the phase line C1.
The model of above-mentioned energization delay relay 1KT is H3Y-2 AC220V, and it is 0.2 S～0.5S that on-delay is adjusted; The model of power-off delay relay 2KT is ST3PF AC220V, and it is 0.2 S～0.5S that power cut off delay is adjusted.
Above-mentioned the first contact 1JC model is NC11-65/04 AC220V, and the second contact 2JC model is CJX2-6511 AC220V, and voltage relay KV model is LY2N-J AC220V.
The invention has the beneficial effects as follows:
1, when online power generation fault, adjusting at energization delay relay and power-off delay relay is in 0.2～0.5S situation, automatically switches to the generator end power supply; Behind online power up, be online power supply by the generator end electrical source exchange automatically again, thereby conscientiously for hydraulic generator unit auxiliary equipment provides uninterrupted power supply, make the hydraulic generator unit can normally carry out various operations.
2, the interior unit type of small hydropower station stand-by power supply a-b box can be followed according to user's actual conditions and be installed, be integrated in the control cabinet, the switchboard of new production can be integrated on the switchboard, this automatic switching box investment is little, install simple, easy to use, be convenient to promote, can for the rural small hydropower automatic improving provide a kind of new approaches, believe and to be widely used by increasing rural small hydropower standing-meeting.Design considerations is provided when can be simultaneously the manufacturer production relevant device.
The features and advantages of the invention will further be set forth in embodiment.
Description of drawings
Fig. 1 is that (first is the circuit diagram of system power supply and machine end power supply and three-phase bus for the circuit diagram of this device; Second portion is on-delay control circuit figure; Third and fourth part is indicator light circuit figure).
Embodiment
Fig. 1 illustrates the automatic cross box of a kind of small hydropower station stand-by power supply, three phase line A of the online power supply of 380V, B and C respectively with three bus AO, BO is connected with CO, three phase line A1 of 380V generator end power supply, B1 and C1 respectively with as three bus AO to hydraulic turbine generator group auxiliary equipment power supply, BO is connected with CO, it is characterized in that, be serially connected with voltage relay KV between described phase line A and the center line N, phase line A1 is connected in series the first normally closed interlock KV1 of voltage relay KV in turn, be connected to center line N behind the second normally closed interlock KV2 and the first contactor 1JC, energization delay relay 1KT one is terminated at the node of the first normally closed interlock KV1 and the second normally closed interlock KV2, and the energization delay relay 1KT other end is connected to center line N;
One of the normally open contact 1KT2 of energization delay relay 1KT is terminated at energization delay relay 1KT one end, the other end of the normally open contact 1KT2 of energization delay relay 1KT is connected to center line N after being connected in series the second contactor 2JC, power-off delay relay 2KT is in parallel with the second contactor 2JC, one of the normally opened contact KT2 of power-off delay relay 2KT is terminated at phase line A1, and the other end of the normally opened contact KT2 of power-off delay relay 2KT is connected to the node of the second normally closed interlock KV3 and the first contactor 1JC;
Three normally closed interlock 1JC1 of above-mentioned the first contactor 1JC are connected between three phase line A, B of described online power supply and C and three bus AO, BO and the CO;
Three normally open contacts of above-mentioned the second contactor 2JC are connected between three phase line A1, B1 of described generator end power supply and C1 and three bus AO, BO and the CO.
Center line N also claims zero line.
Also be connected with resistance R between voltage relay KV and the phase line A.
Be serially connected with another normally closed interlock 1JC2 and the online power supply indicator of the first contactor 1JC between the phase line A of online power supply and the phase line C; Be serially connected with another normally open contact 2JC2 and the machine end power supply indicator of the second contactor 2JC between the phase line A1 of described generator end power supply and the phase line C1.
The model of energization delay relay 1KT is H3Y-2 AC220V, and it is 0.2 S～0.5S that on-delay is adjusted; The model of power-off delay relay 2KT is ST3PF AC220V, and it is 0.2 S～0.5S that power cut off delay is adjusted.
The first contact 1JC model is NC11-65/04 AC220V, and the second contact 2JC model is CJX2-6511 AC220V, and voltage relay KV model is LY2N-J AC220V.
This device circuit is constructed as follows:
1, be normally closed contactor 1JC(take model with a main contacts: NC11-65/04 AC220V is as example) and with a main contacts as the contactor 2JC(that often opens take model: CJX2-6511 AC220V is as example) be switched on or switched off online power supply and machine end power supply.
2, with a voltage relay KV(model: LY2N-J AC220 is example) control contactor 1JC, 2JC disconnect or connect online power supply and machine end power supply.
3, ((come the time-delay of control contactor 1JC, 2JC to disconnect or connection with model: ST3PF 220V 0.5～5S) with model: H3Y-2 AC220V 0～5S) and a power-off delay relay with an energization delay relay.
4, this device integrated installation (the automatic cross box of new production stand-by power supply directly integrated installation on switchboard) in control cabinet.5, increase each one of online power supply, red, the green indicator light of machine end power supply.Outlet is controlled by protection switch.
This device mainly is for the rural small hydropower specialized designs.The online power supply quality of power supply is higher and stable, therefore main power source adopts online power supply (380V), stand-by power supply adopts generator outlet power supply (380V), online power supply is that system power supply is connected to contactor 1JC(model by switch 2K1: behind normally closed interlock 1JC1 NC11-65/04 AC380V), and connection bus again.When online dead electricity, voltage relay KV(model: LY2N-J AC220 is example) potential winding returns initial condition because of the voltage of losing the job, its normally-closed contact KV1, KV3 connect the actuating coil of contactor 1JC, contactor 1JC action, main contacts 1JC1 switches to open position by closure, thereby disconnects online power supply.Simultaneously; machine end power supply A1 connects energization delay relay 1KT(with model by contact KV1: H3Y-2 AC220V 0～5S) work loop; it is about 0.2～0.5S that energization delay relay is adjusted; its normally opened contact time-delay 0.2～0.5S is closed and connect the actuating coil of contactor 2JC; contactor 2JC action; the main contacts 2JC1 of 2JC switches to make position by often opening; thereby joining machine end power supply; for hydraulic generator unit auxiliary equipment provides working power; for example; bus BO is connected to the factory building emergency power supply; bus AO is connected to microcomputer type speed regulator working power; three bus AO; BO and CO connect electronic butterfly valve action power and hydrogovernor action motor power, make normally autostop of hydraulic generator unit.As when meeting the tripping operation of hydraulic generator fault or other reason, online power supply is normal, the automatic cross box non-stop run of stand-by power supply power supply, and the hydraulic generator unit can normal autostop.In the situation that the normal operation of stand-by power supply, online power supply incoming call, the work of voltage relay KV potential winding, normally-closed contact KV1, KV2 closure state are cut to off-state, contact KV1 and contact 1KT2 disconnect the working power of contactor 2JC coil, the main contacts 2JC1 of contactor 2JC switches to open position by make position, generator end power supply dead electricity.While power-off delay relay 2KT dead electricity, it is about 0.2～0.5S that power-off delay relay is adjusted, disconnect the working power of contactor 1JC behind its contact 2KT2 time-delay 0.2～0.5S, contactor 1JC action, main contacts switches to make position by disconnection, online power connection makes the hydraulic generator unit can normally carry out various operations for hydraulic generator unit auxiliary equipment provides working power.It is about 0.2～0.5S that energization delay relay and power-off delay relay are all adjusted, and is in order to prevent the non-synchronization paralleling of contactor 1JC and 2JC, to cause short circuit accident.
Claims (5)
1. automatic cross box of small hydropower station stand-by power supply, comprise, three phase line A of the online power supply of 380V, B and C respectively with three bus AO, BO is connected with CO, three phase line A1 of 380V generator end power supply, B1 and C1 respectively with as three bus AO to hydraulic turbine generator group auxiliary equipment power supply, BO is connected with CO, it is characterized in that, be serially connected with voltage relay KV between described phase line A and the center line N, phase line A1 is connected in series the first normally closed interlock KV1 of voltage relay KV in turn, be connected to center line N behind the second normally closed interlock KV2 and the first contactor 1JC, energization delay relay 1KT one is terminated at the node of the first normally closed interlock KV1 and the second normally closed interlock KV2, and the energization delay relay 1KT other end is connected to center line N;
One of the normally open contact 1KT2 of energization delay relay 1KT is terminated at energization delay relay 1KT one end, the other end of the normally open contact 1KT2 of energization delay relay 1KT is connected to center line N after being connected in series the second contactor 2JC, power-off delay relay 2KT is in parallel with the second contactor 2JC, one of the normally opened contact KT2 of power-off delay relay 2KT is terminated at phase line A1, and the other end of the normally opened contact KT2 of power-off delay relay 2KT is connected to the node of the second normally closed interlock KV3 and the first contactor 1JC;
Three normally closed interlock 1JC1 of above-mentioned the first contactor 1JC are connected between three phase line A, B of described online power supply and C and three bus AO, BO and the CO;
Three normally open contacts of above-mentioned the second contactor 2JC are connected between three phase line A1, B1 of described generator end power supply and C1 and three bus AO, BO and the CO.
2. the automatic cross box of a kind of small hydropower station stand-by power supply according to claim 1 is characterized in that, also is connected with resistance R between described voltage relay KV and the phase line A.
3. the automatic cross box of a kind of small hydropower station stand-by power supply according to claim 2 is characterized in that, is serially connected with another normally closed interlock 1JC2 and the online power supply indicator of the first contactor 1JC between the phase line A of described online power supply and the phase line C; Be serially connected with another normally open contact 2JC2 and the machine end power supply indicator of the second contactor 2JC between the phase line A1 of described generator end power supply and the phase line C1.
4. according to claim 1, the automatic cross box of 2 or 3 described a kind of small hydropower station stand-by power supplies, it is characterized in that, the model of described energization delay relay 1KT is H3Y-2 AC220V, it is 0.2 S～0.5S that on-delay is adjusted; The model of power-off delay relay 2KT is ST3PF AC220V, and it is 0.2 S～0.5S that power cut off delay is adjusted.
5. the automatic cross box of a kind of small hydropower station stand-by power supply according to claim 4, it is characterized in that, described the first contact 1JC model is NC11-65/04 AC220V, and the second contact 2JC model is CJX2-6511 AC220V, and voltage relay KV model is LY2N-J AC220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103442137A CN102868214A (en) | 2012-09-18 | 2012-09-18 | utomatic standby power supply switching box in small water power station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103442137A CN102868214A (en) | 2012-09-18 | 2012-09-18 | utomatic standby power supply switching box in small water power station |
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| CN102868214A true CN102868214A (en) | 2013-01-09 |
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| CN2012103442137A Pending CN102868214A (en) | 2012-09-18 | 2012-09-18 | utomatic standby power supply switching box in small water power station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607152A (en) * | 2013-12-09 | 2014-02-26 | 侯林松 | Motor control system in hydropower station |
| CN104037933A (en) * | 2014-05-30 | 2014-09-10 | 许继电气股份有限公司 | Rapid switching circuit and switching control method of UPS (Uninterruptible Power Supply) |
| CN104701840A (en) * | 2015-03-12 | 2015-06-10 | 杭州德洛电力设备有限公司 | Intelligent three-power automatic transfer switch |
| CN110266006A (en) * | 2019-07-10 | 2019-09-20 | 广东利元亨智能装备股份有限公司 | Power supply control circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002017055A (en) * | 2000-06-30 | 2002-01-18 | Mitsubishi Electric Corp | Uninterruptible power supply apparatus |
| CN201478875U (en) * | 2009-08-25 | 2010-05-19 | 苏州柳溪机电工程有限公司 | Double-power automatic conversion cabinet |
| CN201956742U (en) * | 2010-12-04 | 2011-08-31 | 肖林 | Circuit for automatically switching main power supply and standby power supply |
| CN202856442U (en) * | 2012-09-18 | 2013-04-03 | 四川省电力公司达州电业局 | Standby power supply automatic cross box of small hydropower station |
-
2012
- 2012-09-18 CN CN2012103442137A patent/CN102868214A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002017055A (en) * | 2000-06-30 | 2002-01-18 | Mitsubishi Electric Corp | Uninterruptible power supply apparatus |
| CN201478875U (en) * | 2009-08-25 | 2010-05-19 | 苏州柳溪机电工程有限公司 | Double-power automatic conversion cabinet |
| CN201956742U (en) * | 2010-12-04 | 2011-08-31 | 肖林 | Circuit for automatically switching main power supply and standby power supply |
| CN202856442U (en) * | 2012-09-18 | 2013-04-03 | 四川省电力公司达州电业局 | Standby power supply automatic cross box of small hydropower station |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607152A (en) * | 2013-12-09 | 2014-02-26 | 侯林松 | Motor control system in hydropower station |
| CN103607152B (en) * | 2013-12-09 | 2016-06-15 | 侯林松 | Motor control system in hydropower station |
| CN104037933A (en) * | 2014-05-30 | 2014-09-10 | 许继电气股份有限公司 | Rapid switching circuit and switching control method of UPS (Uninterruptible Power Supply) |
| CN104037933B (en) * | 2014-05-30 | 2018-08-10 | 许继电气股份有限公司 | A kind of fast switch circuit and method for handover control of UPS |
| CN104701840A (en) * | 2015-03-12 | 2015-06-10 | 杭州德洛电力设备有限公司 | Intelligent three-power automatic transfer switch |
| CN110266006A (en) * | 2019-07-10 | 2019-09-20 | 广东利元亨智能装备股份有限公司 | Power supply control circuit |
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Application publication date: 20130109 |