CN101609991A - Three-phase load transfer device - Google Patents
Three-phase load transfer device Download PDFInfo
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- CN101609991A CN101609991A CNA2009100548299A CN200910054829A CN101609991A CN 101609991 A CN101609991 A CN 101609991A CN A2009100548299 A CNA2009100548299 A CN A2009100548299A CN 200910054829 A CN200910054829 A CN 200910054829A CN 101609991 A CN101609991 A CN 101609991A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention provides a kind of three-phase load transfer device, comprise: input module, the input of three-phase alternating current is provided, the input phase sequence of this three-phase alternating current is ABC; The input measurement module judges by electric current and the voltage swing of measuring the three-phase alternating current of importing in the described input module whether three-phase load exists imbalance; The phase sequence adjusting module, for the three-phase current that described input phase sequence is ABC, adopt three independently contactor so that three kinds of output of ABC, BCA, CAB phase sequence to be provided, when described input measurement module measures three-phase load when uneven, export phase sequence and switch, otherwise by former input phase sequence output; The phase sequence display module provides three indicator lights, and a kind of in each indicator light corresponding described ABC, BCA and three kinds of output of the CAB phase sequence is in order to show current output phase sequence; And output module, will export to load through the three-phase alternating current after described phase sequence adjusting module is adjusted phase sequence.
Description
[technical field]
The present invention relates to low-voltage distribution system, particularly relate to the three-phase load transfer device of a kind of energy Balance Control three-phase output.
[background technology]
No matter domestic still external for a long time, because distribution transformer three-phase load imbalance, be in operation and more problem occurred, mainly show as: the transformer operation is uneconomical, failure rate is high, indivedual frequent overheated scaling loss of contact, even in the residential block, the factory district takes place because indivedual platform districts change in voltage is big, makes incidents such as transformer initiation fire.In addition, the transformer load imbalance also can cause increasing the problems such as utilance of line loss, reduction transformer, and the safe operation of power consumption equipment and user's personal safety are also caused potential threat.Therefore, keep the distribution transformer three-phrase burden balance energy-saving and cost-reducing, guarantee that power grid operation has crucial effects for advocating.
For the unbalanced problem of three-phase load, traditional solution roughly has following several:
(1) formulates the unbalanced operational management system of transformer load;
(2) transform electrical network, increase low pressure four line coverage densities, grasp dynamic that three-phase load distributes;
(3) strengthen management of power supply and power utilization, guarantee the transformer load balance;
(4) adopt the zero line multipoint earthing, reduce the zero line loss;
(5) single-phase change power supply is actively promoted in the power supply area that single-phase load is accounted for larger specific gravity.
Above-mentioned these schemes mainly are to make every effort to seek to reach optimized configuration from grid structure and management, yet, all there is certain hysteresis quality in these solutions, and change the variation that is brought for the operational mode of accident and electrical network and almost do not have adaptibility to response, therefore, prior art all can not fundamentally solve the unbalanced problem of three-phase load in the low-voltage distribution system.
[summary of the invention]
For solving the above-mentioned problems in the prior art, the invention provides a kind of three-phase load transfer device, when imbalance appearred in three-phase load in the three-phase AC electrical supply system, this device can be adjusted three-phase power line in time, made three-phase load output reach population equilibrium.
The technical scheme that the present invention takes is as follows:
A kind of three-phase load transfer device comprises:
Input module provides the input of three-phase alternating current, and the input phase sequence of this three-phase alternating current is ABC;
The input measurement module judges by electric current and the voltage swing of measuring the three-phase alternating current of importing in the described input module whether three-phase load is uneven;
The phase sequence adjusting module, for the described input phase sequence three-phase current that is ABC, adopt three independently contactor three kinds of output of ABC, BCA, CAB phase sequence is provided respectively, when described input measurement module measures current three-phase load when uneven, export phase sequence and switch, otherwise by former input phase sequence output;
The phase sequence display module provides three indicator lights, and a kind of in each indicator light corresponding described ABC, BCA and three kinds of output of the CAB phase sequence is in order to show current output phase sequence; And output module, will export to load through the three-phase alternating current after described phase sequence adjusting module switches phase sequence.
Described three-phase load transfer device also comprises a power failure alarm module, this power failure alarm module monitors the control loop of described three-phase load transfer device by voltage relay, this voltage relay sends alarm signal when the control loop dead electricity, at when incoming call this voltage relay described three-phase load transfer device that resets automatically.
Described three-phase load transfer device is arranged at the breakout of distribution equipment on the bar, the house lead in point or the inside, supermarket of civil buildings.
Described three-phase load transfer device is used for the 10KV power supply-distribution system.
Beneficial effect of the present invention is, this three-phase load transfer device can be realized the transfer from dynamic load in power distribution network, thereby fundamentally solved the problem of balance distribution transformer three-phase load, effectively eliminate the harm that three-phase imbalance brought to electrical network, make electrical network safety and stability more, also improve simultaneously the operational efficiency of whole electric power system, reduced grid line loss, can power saving 10% ~ 30% according to load unbalanced degree.Installation of the present invention and operation are all simple and convenient, can move steadily in the long term.
[description of drawings]
Fig. 1 is the principle schematic of three-phase load transfer device of the present invention;
Fig. 2 is the panel schematic diagram of three-phase load transfer device of the present invention;
Fig. 3 is the scheme of installation of three-phase load transfer device of the present invention.
The Reference numeral and the part that relate among the figure are as follows:
1. ammeter unit 2. indicator unit
3. control button unit 10. input modules
20. input measurement module 30. phase sequence adjusting modules
40. phase sequence display module 50. output modules
60. power failure alarm module 100. distribution transformers
200. three-phase load transfer device 300. users
[embodiment]
Below in conjunction with embodiment and with reference to accompanying drawing the present invention is further described:
As shown in Figure 1, a kind of three-phase load transfer device comprises:
As shown in Figure 2, be a kind of embodiment of exterior panel of the present invention, three ammeters are arranged in the ammeter unit 1, show the situation of three-phase load electric current respectively, the user is by observing the uneven degree of three-phase load herein; There are three indicator lights to show current three-phase output phase sequence respectively in the indicator unit 2; Three control buttons are arranged in the control button unit 3, by these control buttons, the user can manually control the phase sequence adjusting module and carry out the phase sequence switching, thereby the three-phase alternating current of input is adjusted according to real-time load condition, realized single-phase user is switched to mutually from heavy load the purpose of light load phase.
As shown in Figure 3, be scheme of installation of the present invention, when a station power distribution transformer 100 during to some users 300 power supplies, three-phase load transfer device 200 is installed at three-phase house lead in point place each household user 300, take place under the unbalanced situation in distribution transforming, can find the distribution transforming reason of unbalanced by these three-phase load transfer devices 200, and immediately load be carried out again adjustment.Three-phase load transfer device of the present invention is applicable to the 10KV power supply-distribution system, and it can be arranged at the house lead in point of breakout, civil buildings of distribution equipment on the bar or inside, supermarket etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some improvements and modifications, these improvements and modifications also should be considered within the scope of protection of the present invention.
Claims (5)
1. a three-phase load transfer device is characterized in that, comprises:
Input module provides the input of three-phase alternating current, and the input phase sequence of this three-phase alternating current is ABC;
The input measurement module judges by electric current and the voltage swing of measuring the three-phase alternating current of importing in the described input module whether three-phase load is uneven;
The phase sequence adjusting module, adopt three independently contactor three kinds of output of ABC, BCA, CAB phase sequence is provided respectively, when described input measurement module measures current three-phase load when uneven, export phase sequence and switch, otherwise by former input phase sequence output;
The phase sequence display module provides three indicator lights, and a kind of in each indicator light corresponding described ABC, BCA and three kinds of output of the CAB phase sequence is in order to show current output phase sequence; And output module, will export to load through the three-phase alternating current after described phase sequence adjusting module switches phase sequence.
2. three-phase load transfer device according to claim 1, it is characterized in that, described three-phase load transfer device also comprises a power failure alarm module, this power failure alarm module monitors the control loop of described three-phase load transfer device by voltage relay, this voltage relay sends alarm signal when the control loop dead electricity, at when incoming call this voltage relay described three-phase load transfer device that resets automatically.
3. three-phase load transfer device according to claim 1 is characterized in that, when described phase sequence adjusting module is exported the phase sequence adjustment, disconnects the contactor of original phase sequence output earlier, the phase sequence of closing new again output contactor.
4. three-phase load transfer device according to claim 1 is characterized in that described three-phase load transfer device is used for the 10KV power supply-distribution system.
5. three-phase load transfer device according to claim 4 is characterized in that, described three-phase load transfer device is arranged at the breakout of distribution equipment on the bar, the house lead in point or the inside, supermarket of civil buildings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100548299A CN101609991A (en) | 2009-07-15 | 2009-07-15 | Three-phase load transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100548299A CN101609991A (en) | 2009-07-15 | 2009-07-15 | Three-phase load transfer device |
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| Publication Number | Publication Date |
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| CN101609991A true CN101609991A (en) | 2009-12-23 |
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| CNA2009100548299A Pending CN101609991A (en) | 2009-07-15 | 2009-07-15 | Three-phase load transfer device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496492A (en) * | 2011-12-03 | 2012-06-13 | 山东卓尔电气有限公司 | Remote control phase-change switch |
| CN103308727A (en) * | 2013-05-08 | 2013-09-18 | 嘉兴电力局 | Phase sequence switching device of three-phase alternating current tester |
| WO2015021767A1 (en) * | 2013-08-16 | 2015-02-19 | 深圳市泰昂能源科技股份有限公司 | Stationary intelligent power-distribution module with cascaded base displaying phase sequence |
| CN104934994A (en) * | 2015-07-01 | 2015-09-23 | 国家电网公司 | Low-voltage phase-change switch |
| CN104993504A (en) * | 2014-10-21 | 2015-10-21 | 中国矿业大学 | Unbalanced load charged commutation apparatus |
| CN107613584A (en) * | 2017-09-07 | 2018-01-19 | 广东元森能源科技有限公司 | A kind of energy-saving control system for heater |
| CN107634527A (en) * | 2017-11-09 | 2018-01-26 | 中气电力装备有限公司 | A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance |
| CN109633350A (en) * | 2018-12-12 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | The method and system of detection load direct supply system generator unit stator Xuhanting oral solution reason |
| CN112003280A (en) * | 2018-12-19 | 2020-11-27 | 军事科学院系统工程研究院卫勤保障技术研究所 | Portable three-phase load balanced type power distribution system for field tent hospital |
-
2009
- 2009-07-15 CN CNA2009100548299A patent/CN101609991A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496492A (en) * | 2011-12-03 | 2012-06-13 | 山东卓尔电气有限公司 | Remote control phase-change switch |
| CN102496492B (en) * | 2011-12-03 | 2014-02-12 | 山东卓尔电气有限公司 | Remote control phase-change switch |
| CN103308727A (en) * | 2013-05-08 | 2013-09-18 | 嘉兴电力局 | Phase sequence switching device of three-phase alternating current tester |
| WO2015021767A1 (en) * | 2013-08-16 | 2015-02-19 | 深圳市泰昂能源科技股份有限公司 | Stationary intelligent power-distribution module with cascaded base displaying phase sequence |
| CN104993504A (en) * | 2014-10-21 | 2015-10-21 | 中国矿业大学 | Unbalanced load charged commutation apparatus |
| CN104934994A (en) * | 2015-07-01 | 2015-09-23 | 国家电网公司 | Low-voltage phase-change switch |
| CN107613584A (en) * | 2017-09-07 | 2018-01-19 | 广东元森能源科技有限公司 | A kind of energy-saving control system for heater |
| CN107634527A (en) * | 2017-11-09 | 2018-01-26 | 中气电力装备有限公司 | A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance |
| CN107634527B (en) * | 2017-11-09 | 2024-03-19 | 中气电力装备有限公司 | Regulation system for treating three-phase imbalance of distribution transformer area |
| CN109633350A (en) * | 2018-12-12 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | The method and system of detection load direct supply system generator unit stator Xuhanting oral solution reason |
| CN109633350B (en) * | 2018-12-12 | 2020-12-15 | 国网山东省电力公司电力科学研究院 | Method and system for detecting virtual grounding reason of generator stator of load direct supply system |
| CN112003280A (en) * | 2018-12-19 | 2020-11-27 | 军事科学院系统工程研究院卫勤保障技术研究所 | Portable three-phase load balanced type power distribution system for field tent hospital |
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Application publication date: 20091223 |