CN107634527A - A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance - Google Patents
A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance Download PDFInfo
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- CN107634527A CN107634527A CN201711098511.1A CN201711098511A CN107634527A CN 107634527 A CN107634527 A CN 107634527A CN 201711098511 A CN201711098511 A CN 201711098511A CN 107634527 A CN107634527 A CN 107634527A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 25
- 230000010363 phase shift Effects 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 238000004378 air conditioning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance to include：Data acquisition module, master controller, single-phase load commutation extension set, three-phase load commutation extension set；The master controller, it is connected respectively with the single-phase load commutation extension set and the three-phase load commutation extension set, the degree of unbalancedness of the three-phase current of the low side bus and the degree of unbalancedness of the three-phase current of each branch bus for being obtained according to data acquisition module control the single-phase load commutation extension set that the monophase current phase shift of the single-phase load and the three-phase load commutation extension set are switched the three-phase current of the threephase load into regulation between A phase, B phase, C phase respectively.By setting single-phase load commutation extension set and three-phase load commutation extension set to coordinate regulation, the current three-phase degree of unbalancedness of the tri-phase unbalance factor of the electric current of the A phase, B phase, C phase of the low side bus and the A phase, B phase, C phase of each branch bus is reduced.
Description
Technical field
The present invention relates to electric power distribution low-voltage sharing of load technical field, and distribute-electricity transformer district three-phase is administered more particularly to one kind
Unbalanced regulating system.
Background technology
The end user of low-voltage distribution transformer power system includes substantial amounts of single-phase load and three-phase load, especially business and the people
With facility, such as air-conditioning, computer, electric heater, refrigerator, illumination and various household electrical appliance, its quantity is more and more, and power is more next
It is bigger, it can all cause the dynamic unbalance of three-phase load increasingly severe plus the seasonality and randomness of electricity consumption.
When three-phrase burden balance, three-phase current is equal, because of 120 degree of fundamental phase angular difference, the vector on their neutral conductors
With for zero, so the neutral conductor does not have electric current by the way that when three-phase load unbalance, three-phase current is unequal, and neutral current is not
It is zero again, the degree of unbalancedness of three-phase load is bigger, and neutral current is bigger.Neutral current is in neutral point with equal in magnitude, side
Shunted to identical current component in distribution transformer is respectively mutually wound, referred to as zero-sequence current, when three-phase load is seriously uneven
During weighing apparatus, distribution transformer can produce larger zero-sequence current, and zero-sequence current flows in distribution transformer will necessarily produce zero sequence
Magnetic flux, the iron core, metal shell and radiating tube that zero sequence fluxes pass through transformer etc. forms loop, zero sequence fluxes cutting transformer gold
Metal elements produce induced potential, and electric current is formed in metallic conductor, that is, are vortexed, and are vortexed and are flowed in transformer metallic conductor
Dynamic to produce heat, i.e. eddy-current loss, so that transformer loss increases, power factor declines, and also jeopardizes transformer when serious
Safe operation.
The dynamic unbalance of three-phase load, the harm brought to power system is extremely serious, and the dynamic of three-phase load is uneven
Weighing apparatus can cause line loss increase, transformer to produce additional iron losses, produce variation, can also cause power system to produce additional
Copper loss, additional copper loss increase can cause transformer to generate heat, and reduce the operational efficiency of transformer.
In the prior art, the regulation that the three-phase equilibrium of single-phase load is merely related to for the problem of three-phase load unbalance is asked
Topic, with increasing for threephase load, is only adjusted from single-phase load, and it is relatively low to will result in regulation result precision.
So need a kind of regulation system for the improvement distribute-electricity transformer district three-phase imbalance that can reduce three-phase load unbalance degree badly
System.
The content of the invention
It is an object of the invention to provide a kind of improvement distribute-electricity transformer district three-phase that can reduce three-phase load unbalance degree is uneven
The regulating system of weighing apparatus.
To achieve the above object, the invention provides following scheme：
A kind of regulating system for administering distribute-electricity transformer district three-phase imbalance, the regulating system include：Data acquisition module, master
Controller, single-phase load commutation extension set, three-phase load commutation extension set；
The data acquisition module, it is connected with the master controller, the low-pressure side of transformer in a power distribution system is set
Bus and each branch bus, the three-phase of the low side bus is respectively A phase, B phase, C phase, and the data acquisition module is used for real
When monitor the low side bus A phase, B phase, C phase electric current and each branch bus A phase, B phase, C phase electric current, and send
To the master controller；
The single-phase load commutation extension set, the front side of terminal user's table of single-phase load is arranged on, for will be described single-phase
The monophase current phase shift of load；
The three-phase load commutation extension set, the front side of terminal user's table of threephase load is arranged on, for by the three-phase
The three-phase current of load switches regulation between A phase, B phase, C phase；
The master controller, it is connected, uses with the single-phase load commutation extension set and the three-phase load commutation extension set respectively
In the three-phase current according to the low side bus degree of unbalancedness and each branch bus three-phase current degree of unbalancedness
The single-phase load commutation extension set is controlled respectively by the monophase current phase shift of the single-phase load and the three-phase load commutation point
Machine switches the three-phase current of the threephase load regulation between A phase, B phase, C phase.
Optionally, the single-phase load commutation extension set specifically includes：Monophase current collecting unit, single-phase control unit, list
Phase load commutation combination switch；
The monophase current collecting unit, it is connected with the single-phase control unit, is arranged on the terminal of the single-phase load
The front side of user's table, the monophase current of the incoming end for gathering the single-phase load in real time, and the monophase current is sent
To the single-phase control unit；
Single-phase load commutation combination switch, it is connected with the single-phase control unit, for by the monophase current phase shift；
The single-phase control unit, is connected with the master controller, and the master controller sends control signal and sent extremely
The single-phase control unit.
Optionally, the three-phase load commutation extension set specifically includes：Three-phase current collecting unit, three-phase control unit, three
Phase load commutation combination switch；
The three-phase current collecting unit, it is connected with the three-phase control unit, is arranged on the terminal of the threephase load
The front side of user's table, the three-phase current of the incoming end for gathering the threephase load in real time, and the three-phase current is sent
To the three-phase control unit；
Three-phase load commutation combination switch, be connected with the three-phase control unit, for by the three-phase current in A phases, B
The alternate switching regulation of phase, C；
The three-phase control unit, is connected with the master controller, and the master controller sends control signal and sent extremely
The three-phase control unit.
Optionally, the regulating system also includes：Display module, it is connected with the master controller, for showing the list
The monophase current of phase load and the three-phase current of the threephase load.
Optionally, the regulating system also includes：Single-phase communication unit, three-phase communication unit；
The single-phase communication unit, it is connected respectively with the single-phase control unit and the master controller, for by described in
Monophase current signal in single-phase control unit is transmitted to the master controller；
The three-phase communication unit, it is connected respectively with the three-phase control unit and the master controller, for by described in
Three-phase current signal in three-phase control unit is transmitted to the master controller.
According to specific embodiment provided by the invention, the invention discloses following technique effect：The invention discloses one kind
The regulating system of the improvement distribute-electricity transformer district three-phase imbalance of three-phase load unbalance degree can be reduced, the data acquisition module is real
When monitor the low side bus A phase, B phase, C phase electric current and each branch bus A phase, B phase, C phase electric current, the master
Controller is according to the tri-phase unbalance factor of the electric current of the A phase, B phase, C phase of the low side bus and A phases, the B of each branch bus
Phase, the current three-phase degree of unbalancedness of C phases control the single-phase load commutation extension set to be additionally operable to monophase current phase shift, master controller
Control three-phase load commutation extension set switches three-phase current regulation, single-phase load commutation extension set and three-phase between A phase, B phase, C phase
Load commutation extension set coordinate regulation, reduce the A phase, B phase, C phase of the low side bus electric current tri-phase unbalance factor and
The current three-phase degree of unbalancedness of the A phase, B phase, C phase of each branch bus.
Solve the problems, such as that the more distribute-electricity transformer district of threephase load is difficult to balance adjustment, at the same also solve by
It is uneven in low-voltage distribution transformer severe three-phase and caused by power wastage the problem of, improve low-voltage distribution transformer system operational efficiency and
Service life.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural topology figure of distribution system；
Fig. 2 is a kind of structure composition block diagram for the regulating system for administering distribute-electricity transformer district three-phase imbalance of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide a kind of improvement distribute-electricity transformer district three-phase that can reduce three-phase load unbalance degree is uneven
The regulating system of weighing apparatus.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
The topological diagram of distribution system as shown in Figure 1, a kind of regulation system for administering distribute-electricity transformer district three-phase imbalance of the present invention
System, the main frame 3 of the regulating system are arranged on the low-pressure side 2 of distribution transforming system 1, branch bus 4, the three-phase being arranged on branch line
Load 5 and single-phase load 6, as shown in Fig. 2 the main frame 3 includes data acquisition module 7, master controller 8 and display module 9.
As shown in Fig. 2 a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance, the regulating system include：Data
Acquisition module 7, master controller 8, single-phase load commutation extension set 13, three-phase load commutation extension set 12.
The data acquisition module 7, it is connected with the master controller 8, the transformer being arranged in the distribution system 1
The bus of low-pressure side 2 and each branch bus 4, the three-phase of the bus of low-pressure side 2 is respectively A phase, B phase, C phase, the data acquisition
Module 7 is used for the electric current of A phase, B phase, C phase and the A phase, B phase, C phase of each branch bus 4 for monitoring the bus of low-pressure side 2 in real time
Electric current, and send to the master controller 8.
The single-phase load commutation extension set 13, the front side of terminal user's table of single-phase load is arranged on, for by the list
The monophase current phase shift of phase load；The three-phase load commutation extension set 12, the front side of terminal user's table of threephase load is arranged on,
For the three-phase current of the threephase load to be switched to regulation between A phase, B phase, C phase.
As shown in Fig. 2 the master controller 8, is changed with the single-phase load commutation extension set 13 and the three-phase load respectively
Phase extension set 12 connects, for the three-phase current according to the bus of low-pressure side 2 degree of unbalancedness and each branch bus 4 three
The degree of unbalancedness of phase current control the single-phase load commutation extension set 13 by the monophase current phase shift of the single-phase load respectively and
The three-phase load commutation extension set 12 switches the three-phase current of the threephase load regulation, the master between A phase, B phase, C phase
The degree of unbalancedness threshold value of three-phase current is set in controller 8, when the bus of low-pressure side 2 three-phase current degree of unbalancedness and
When the degree of unbalancedness of the three-phase current of each branch bus 4 exceeds degree of unbalancedness threshold value, the master controller 8 controls the list
Phase load commutation extension set 13 is by the monophase current phase shift of the single-phase load and the three-phase load commutation extension set 12 by described three
The three-phase current of phase load switches regulation between A phase, B phase, C phase, makes the degree of unbalancedness of the three-phase current of the bus of low-pressure side 2
It is maintained at the degree of unbalancedness of the three-phase current of each branch bus 4 in the degree of unbalancedness threshold range of setting.
As shown in Fig. 2 the single-phase load commutation extension set 13 specifically includes：Monophase current collecting unit 14, single-phase control
Unit 15, single-phase load commutation combination switch 16.
The monophase current collecting unit 14, it is connected with the single-phase control unit 15, is arranged on the single-phase load 6
The front side of terminal user's table, the monophase current of the incoming end for gathering the single-phase load 6 in real time, and by the monophase current
Send to the single-phase control unit 15.
Single-phase load commutation combination switch 16, it is connected with the single-phase control unit 15, for the monophase current to be moved
Phase.
The single-phase control unit 15, it is connected with the master controller 8, it is concurrent that the master controller 8 sends control signal
Deliver to the single-phase control unit 15.
As shown in Fig. 2 the three-phase load commutation extension set 12 specifically includes：Three-phase current collecting unit 19, three phase controls
Unit 18, three-phase load commutation combination switch 17.
The three-phase current collecting unit 19, it is connected with the three-phase control unit 18, is arranged on the threephase load 5
The front side of terminal user's table, the three-phase current of the incoming end for gathering the threephase load 5 in real time, and by the three-phase current
Send to the three-phase control unit 18.
Three-phase load commutation combination switch 17, be connected with the three-phase control unit 18, for by the three-phase current in A
The alternate switching regulation of phase, B phases, C.
The three-phase control unit 18, it is connected with the master controller 8, it is concurrent that the master controller 8 sends control signal
Deliver to the three-phase control unit 18.
As shown in Fig. 2 the regulating system also includes：Display module 9, it is connected with the master controller 8, for showing
State the monophase current of single-phase load 6 and the three-phase current of the threephase load 5.
As shown in Fig. 2 the regulating system also includes：Single-phase communication unit 10, three-phase communication unit 11；
The single-phase communication unit 10, it is connected respectively with the single-phase control unit 15 and the master controller 8, for inciting somebody to action
Monophase current signal in the single-phase control unit 15 is transmitted to the master controller 8；The three-phase communication unit 11, respectively
It is connected with the three-phase control unit 18 and the master controller 8, for by the three-phase current in the three-phase control unit 18
Signal is transmitted to the master controller 8.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (5)
1. a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance, it is characterised in that the regulating system includes：Data are adopted
Collect module, master controller, single-phase load commutation extension set, three-phase load commutation extension set；
The data acquisition module, it is connected with the master controller, the low side bus of transformer in a power distribution system is set
With each branch bus, the three-phase of the low side bus is respectively A phase, B phase, C phase, and the data acquisition module is used to supervise in real time
The electric current of the A phase, B phase, C phase of the low side bus and the electric current of the A phase, B phase, C phase of each branch bus are surveyed, and is sent to institute
State master controller；
The single-phase load commutation extension set, the front side of terminal user's table of single-phase load is arranged on, for by the single-phase load
Monophase current phase shift；
The three-phase load commutation extension set, the front side of terminal user's table of threephase load is arranged on, for by the threephase load
Three-phase current switch regulation between A phase, B phase, C phase；
The master controller, it is connected respectively with the single-phase load commutation extension set and the three-phase load commutation extension set, for root
According to the three-phase current of the low side bus degree of unbalancedness and each branch bus three-phase current degree of unbalancedness distinguish
Control the single-phase load commutation extension set will by the monophase current phase shift of the single-phase load and the three-phase load commutation extension set
The three-phase current of the threephase load switches regulation between A phase, B phase, C phase.
2. a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance according to claim 1, it is characterised in that described
Single-phase load commutation extension set specifically includes：Monophase current collecting unit, single-phase control unit, single-phase load commutation combination switch；
The monophase current collecting unit, it is connected with the single-phase control unit, is arranged on the terminal user of the single-phase load
The front side of table, the monophase current of the incoming end for gathering the single-phase load in real time, and the monophase current is sent to institute
State single-phase control unit；
Single-phase load commutation combination switch, it is connected with the single-phase control unit, for by the monophase current phase shift；
The single-phase control unit, is connected with the master controller, and the master controller sends control signal and sent to described
Single-phase control unit.
3. a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance according to claim 1, it is characterised in that described
Three-phase load commutation extension set specifically includes：Three-phase current collecting unit, three-phase control unit, three-phase load commutation combination switch；
The three-phase current collecting unit, it is connected with the three-phase control unit, is arranged on the terminal user of the threephase load
The front side of table, the three-phase current of the incoming end for gathering the threephase load in real time, and the three-phase current is sent to institute
State three-phase control unit；
Three-phase load commutation combination switch, be connected with the three-phase control unit, for by the three-phase current in A phases, B phases, C
Alternate switching regulation；
The three-phase control unit, is connected with the master controller, and the master controller sends control signal and sent to described
Three-phase control unit.
4. according to a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance according to claim 1, it is characterised in that
The regulating system also includes：Display module, it is connected with the master controller, for showing the monophase current of the single-phase load
With the three-phase current of the threephase load.
5. according to according to a kind of regulating system for administering distribute-electricity transformer district three-phase imbalance according to claim 1, its feature
It is, the regulating system also includes：Single-phase communication unit, three-phase communication unit；
The single-phase communication unit, it is connected respectively with the single-phase control unit and the master controller, for will be described single-phase
Monophase current signal in control unit is transmitted to the master controller；
The three-phase communication unit, it is connected respectively with the three-phase control unit and the master controller, for by the three-phase
Three-phase current signal in control unit is transmitted to the master controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711098511.1A CN107634527B (en) | 2017-11-09 | 2017-11-09 | Regulation system for treating three-phase imbalance of distribution transformer area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711098511.1A CN107634527B (en) | 2017-11-09 | 2017-11-09 | Regulation system for treating three-phase imbalance of distribution transformer area |
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| CN107634527B CN107634527B (en) | 2024-03-19 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245126A (en) * | 2018-09-07 | 2019-01-18 | 中气电力装备有限公司 | A kind of three-phase alternating current automatic pressure regulating device and regulation method |
| CN109842136A (en) * | 2019-03-05 | 2019-06-04 | 珠海万力达电气自动化有限公司 | A kind of three-phase imbalance commutation system and its phase change method |
| CN109900996A (en) * | 2019-04-10 | 2019-06-18 | 浙江蓝嘉电力科技有限公司 | A kind of simulating grid high power three-phase imbalance adjusts and controlling device |
| CN110323765A (en) * | 2019-06-10 | 2019-10-11 | 国电南瑞南京控制系统有限公司 | A kind of distribution transformer optimization progress control method and system |
| CN111130129A (en) * | 2018-06-07 | 2020-05-08 | 安徽南瑞中天电力电子有限公司 | Multifunctional automatic phase-changing system for medium and low voltage line |
| CN111880017A (en) * | 2020-07-02 | 2020-11-03 | 国网天津市电力公司 | Three-phase unbalance management test system and test method for power distribution area |
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Denomination of invention: A regulating system for managing three-phase imbalance in the distribution substation area Granted publication date: 20240319 Pledgee: Agricultural Bank of China Limited by Share Ltd. South Lake branch Pledgor: ZHONGQI POWER EQUIPMENT Co.,Ltd. Registration number: Y2024330001339 |
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