CN201515233U - Three-load switching device - Google Patents
Three-load switching device Download PDFInfo
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- CN201515233U CN201515233U CN2009200782770U CN200920078277U CN201515233U CN 201515233 U CN201515233 U CN 201515233U CN 2009200782770 U CN2009200782770 U CN 2009200782770U CN 200920078277 U CN200920078277 U CN 200920078277U CN 201515233 U CN201515233 U CN 201515233U
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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 utility model provides a three-phase load switching device which comprises an input module, an input measuring module, a phase sequence adjusting module, a phase sequence display module and an output module, wherein the input module supplies input of three-phase alternating current, the input phase sequence of the three-phase alternating current is A B C, the input measuring module judges whether the three-phase load is balanced or not through measuring the sizes of current and voltage of three-phase alternating current input in the input module, the phase sequence adjusting module adopts three independent contactors for supplying three output phase sequences of ABC, BCA and CAB for the three-phase current whose input phase sequence is ABC, and when the input measuring module measures that the three-phase load is unbalanced, output phase sequence switch is conducted, or current is output according to the original input phase sequence, the phase sequence display module provides three indicating lamps, and each indicating lamps corresponds to one of the three output phase sequences of ABC, BCA and CAB for displaying current output phase sequence, and the output module outputs three-phase alternating current to the load after the phase sequence adjusting module regulates phase sequences.
Description
[technical field]
The utility model relates to low-voltage distribution system, particularly relates 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.
[utility model content]
For solving the above-mentioned problems in the prior art, the utility model 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 utility model is taked 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.
The beneficial effects of the utility model are, 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 utility model and operation are all simple and convenient, can move steadily in the long term.
[description of drawings]
Fig. 1 is the principle schematic of the utility model three-phase load transfer device;
Fig. 2 is the panel schematic diagram of the utility model three-phase load transfer device;
Fig. 3 is the scheme of installation of the utility model three-phase load transfer device.
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 utility model 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 utility model, 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 utility model, 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 utility model 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 utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model design; can also make some improvements and modifications, these improvements and modifications also should be considered as in the protection range of the present utility model.
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 |
|---|---|---|---|
| CN2009200782770U CN201515233U (en) | 2009-07-15 | 2009-07-15 | Three-load switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200782770U CN201515233U (en) | 2009-07-15 | 2009-07-15 | Three-load switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201515233U true CN201515233U (en) | 2010-06-23 |
Family
ID=42486645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200782770U Expired - Fee Related CN201515233U (en) | 2009-07-15 | 2009-07-15 | Three-load switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201515233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112886617A (en) * | 2021-02-03 | 2021-06-01 | 华南理工大学 | Commutation control method and system based on BPSO algorithm |
-
2009
- 2009-07-15 CN CN2009200782770U patent/CN201515233U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112886617A (en) * | 2021-02-03 | 2021-06-01 | 华南理工大学 | Commutation control method and system based on BPSO algorithm |
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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: 20100623 Termination date: 20150715 |
|
| EXPY | Termination of patent right or utility model |