CN108493965A - Distribution transformer three-phase imbalance Automatic adjustment method - Google Patents
Distribution transformer three-phase imbalance Automatic adjustment method Download PDFInfo
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- CN108493965A CN108493965A CN201810365108.9A CN201810365108A CN108493965A CN 108493965 A CN108493965 A CN 108493965A CN 201810365108 A CN201810365108 A CN 201810365108A CN 108493965 A CN108493965 A CN 108493965A
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- commutation
- phase
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- control module
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of distribution transformer three-phase imbalance Automatic adjustment method, technical characteristics are：Three-phase current acquisition is carried out in transformer outlet installation intelligent measure and control module, automatic commutation module is installed at entrance line feeder line and carries out tri-phase unbalance factor calculating；If intelligent measure and control module judges degree of unbalancedness threshold value of the Three-Phase Transformer electric current beyond setting, wall line current information is climbed from automatic commutation module calling is corresponding；Intelligent measure and control module calculates optimal lower family feeder line commutation scheme in real time, and actuating signal is transmitted to the automatic commutation module of entrance line；Automatic commutation module carries out commutation automatically after receiving signal.The present invention is based on distribution low voltage electric network real network topological structure and real-time load information so that equal load is more accurate, more gears to actual circumstances；Automation and intelligentized commutation strategy make equal load operation more targeted and logic, more effectively reduce the O＆M cost and public sentiment pressure of electric company.
Description
Technical field
The invention belongs to distribution transformer technical fields, especially a kind of distribution transformer three-phase imbalance automatic adjustment side
Method.
Background technology
Distribution low-voltage platform area three-phase imbalance problem is more universal, and especially low pressure makes somebody a mere figurehead taiwan area, in Du Dong and aestivates the phase
Between since power load is irregular, causes taiwan area severe three-phase uneven due to entrance line wiring confusion etc., so as to cause transformation
The harm such as device terminal voltage is low, exit potential is uneven, transformer is contributed is reduced, loss increases, affect customer electricity experience
With Electrical Safety and increase Utilities Electric Co.'s operation expense.Utilities Electric Co. on artificial bar mostly by operating to distribution at present
Taiwan area carries out equal load, and needing repeatedly to have a power failure in equal load process operated on bar, causes to stop by operating on artificial bar
The electric time is longer, seriously affects user power utilization experience and there are larger security risks.
Invention content
It is an object of the invention to overcome the deficiencies in the prior art, propose that a kind of reasonable design, processing speed are fast and automatic
The high distribution transformer three-phase imbalance Automatic adjustment method of change degree.
The present invention solves its technical problem and following technical scheme is taken to realize：
A kind of distribution transformer three-phase imbalance Automatic adjustment method, includes the following steps：
Step 1 carries out three-phase current acquisition in transformer outlet installation intelligent measure and control module, is installed at entrance line feeder line
Automatic commutation module carries out tri-phase unbalance factor calculating；
If step 2, intelligent measure and control module judge degree of unbalancedness threshold value of the Three-Phase Transformer electric current beyond setting, hair
Go out and call up signal, and wall line current information is climbed from automatic commutation module calling is corresponding；
Step 3, intelligent measure and control module calculate transformer outlet three-phase current and each lower family feeder line three-phase electricity flow valuve,
Optimal lower family feeder line commutation scheme is calculated in real time, and actuating signal is transmitted to the automatic commutation module of entrance line；
Step 4, automatic commutation module carry out commutation automatically after receiving signal, to realize that three-phase imbalance taiwan area is automatically equal
Load.
The automatic commutation module is made of signal processing unit and coupled measuring unit and operating unit；Institute
Intelligent measure and control module is stated to be made of decision package and coupled calculation processing unit, measuring unit and operating unit, it should
Measuring unit is connected with calculation processing unit；At the operating unit of the intelligent measure and control module and the signal of automatic commutation module
Reason unit is connected, and the signal processing unit of the automatic commutation module is connected with the decision package of intelligent measure and control module.
The specific processing method of the step 4 includes：
(1) one closest to maximum value and average value difference CUT of the sum of family feeder current under being found in electric current maximum phase
Or several at least lower family feeder line group SET carry out commutations, commutation to electric current minimum phase, P in feeder line groupijMeet：
0.9*CUT ＜ ∑s Pij＜ 1.1CUT
(2) carry out tri-phase unbalance factor verification, meet given threshold value and then form commutation scheme, commutation flow terminates, otherwise weighs
(1) multiple step operates.
The advantages and positive effects of the present invention are：
The present invention carries out three-phase current acquisition in transformer outlet installation intelligent measure and control module, is installed at entrance line feeder line
Automatic commutation module carries out tri-phase unbalance factor calculating, so as to realize the fast automatic adjusting of three-phase imbalance taiwan area, with
Based on distribution low voltage electric network real network topological structure and real-time load information so that equal load is more accurate, more suits
It is practical；Automation and intelligentized commutation strategy make equal load operation more targeted and logic, have than artificial load
Better user experience, the O＆M cost and public sentiment pressure of electric company are more effectively reduced.
Description of the drawings
Fig. 1 is the distribution transformer three-phase imbalance Automatic adjustment method flow chart of the present invention；
Fig. 2 is intelligent measure and control module and automatic commutation function structure chart；
Fig. 3 is commutation strategy flow chart.
Specific implementation mode
Below in conjunction with attached drawing, the present invention will be further described.
A kind of distribution transformer three-phase imbalance Automatic adjustment method, as shown in Figure 1, including the following steps：
Step 1 carries out three-phase current acquisition in transformer outlet installation intelligent measure and control module, is installed at entrance line feeder line
Automatic commutation module carries out tri-phase unbalance factor calculating.
As shown in Fig. 2, automatic commutation module is by signal processing unit and coupled measuring unit and operating unit
It constitutes.Measuring unit climbs wall line current for measuring, and signal processing unit is used to receive the sign of intelligent measure and control module decision package
It calls signal together and sends measuring unit measurement result to intelligent measure and control module, operating unit is for receiving intelligent measure and control module operation
It instructs and completes commutation operation.
Intelligent measure and control module is by decision package and coupled calculation processing unit, measuring unit and operating unit structure
At, meanwhile, measuring unit is connected with calculation processing unit.Measuring unit surveys transformer outlet low voltage three-phase electric current
Amount, and three-phase electricity flow valuve is transmitted to processing computing unit, processing computing unit calculates three-phase current and is sent to decision
Unit, when judging three-phase imbalance, decision package, which is sent out, calls up signal, calls automatic commutation module on each lower family feeder line
Current information, decision package select selection numerical procedure according to commutation strategy and are sent to calculation processing unit, calculation processing list
Member is carried out to be calculated in real time, and result of calculation is transmitted to decision package again, when result of calculation meets commutation strategy under decision package
It is instructed up to commutation to operating unit, operating unit sends out commutation signal to automatic commutation module, completes commutation function.
Intelligent measure and control module carries out three-phase current acquisition, and transformer outlet electric current is denoted as：I=[IA IB IC]
Family feeder line is climbed wall line current and is indicated with matrix P under the n items of automatic commutation module：
Transformer outlet current maxima MAX, minimum value MIN and average value AVE are respectively：
Maximum value is denoted as with average value difference：CUT=MAX-AVE.
If step 2, intelligent measure and control module judge degree of unbalancedness threshold value of the Three-Phase Transformer electric current beyond setting, hair
Go out to call up signal；Wall line current information is climbed from automatic commutation module calling is corresponding.
Step 3, intelligent measure and control module are according to commutation strategy to transformer outlet three-phase current and each lower family feeder line three-phase electricity
Flow valuve is calculated, and calculates optimal lower family feeder line commutation scheme in real time；And actuating signal is transmitted to by 4G network transmissions and is changed
The automatic commutation module of entrance line involved by phase scheme.
Step 4, automatic commutation module carry out commutation automatically after receiving signal, to realize that three-phase imbalance taiwan area is automatically equal
Load.
In this step, commutation strategy follows the commutation operation as few as possible in the case where meeting tri-phase unbalance factor threshold condition
Principle.As shown in figure 3, the specific processing method of this step is：
(1) the one or several at least lower families of the sum of family feeder current closest to CUT are presented under being found in electric current maximum phase
Line group SET carries out commutation, commutation to electric current minimum phase, P in feeder line groupijMeet：
0.9*CUT ＜ ∑s Pij＜ 1.1CUT
(2) carry out tri-phase unbalance factor verification, meet given threshold value and then form commutation scheme, commutation flow terminates, otherwise
Repeat (1) operation.
It is emphasized that embodiment of the present invention is illustrative, without being restrictive, therefore packet of the present invention
Include the embodiment being not limited to described in specific implementation mode, it is every by those skilled in the art according to the technique and scheme of the present invention
The other embodiment obtained, also belongs to the scope of protection of the invention.
Claims (3)
1. a kind of distribution transformer three-phase imbalance Automatic adjustment method, it is characterised in that include the following steps：
Step 1 carries out three-phase current acquisition in transformer outlet installation intelligent measure and control module, is installed at entrance line feeder line automatic
Commutation module carries out tri-phase unbalance factor calculating；
If step 2, intelligent measure and control module judge degree of unbalancedness threshold value of the Three-Phase Transformer electric current beyond setting, sign is sent out
It calls signal together, and wall line current information is climbed from automatic commutation module calling is corresponding；
Step 3, intelligent measure and control module calculate transformer outlet three-phase current and each lower family feeder line three-phase electricity flow valuve, in real time
Optimal lower family feeder line commutation scheme is calculated, and actuating signal is transmitted to the automatic commutation module of entrance line；
Step 4, automatic commutation module carry out commutation automatically after receiving signal, to realize that three-phase imbalance taiwan area is automatically negative
Lotus.
2. distribution transformer three-phase imbalance Automatic adjustment method according to claim 1, it is characterised in that：It is described automatic
Commutation module is made of signal processing unit and coupled measuring unit and operating unit；The intelligent measure and control module by
Decision package and coupled calculation processing unit, measuring unit and operating unit are constituted, at the measuring unit and calculating
Reason unit is connected；The operating unit of the intelligent measure and control module is connected with the signal processing unit of automatic commutation module, institute
The signal processing unit for stating automatic commutation module is connected with the decision package of intelligent measure and control module.
3. distribution transformer three-phase imbalance Automatic adjustment method according to claim 1, it is characterised in that：The step
4 specific processing method includes：
If (1) under being found in electric current maximum phase the sum of family feeder current closest to one of maximum value and average value difference CUT or
Dry at least lower family feeder line group SET carries out commutation, commutation to electric current minimum phase, P in feeder line groupijMeet：
0.9*CUT ＜ ∑s Pij＜ 1.1CUT
(2) carry out tri-phase unbalance factor verification, meet given threshold value and then form commutation scheme, commutation flow terminates, and otherwise repeats to walk
Suddenly it (1) operates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810365108.9A CN108493965A (en) | 2018-04-18 | 2018-04-18 | Distribution transformer three-phase imbalance Automatic adjustment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810365108.9A CN108493965A (en) | 2018-04-18 | 2018-04-18 | Distribution transformer three-phase imbalance Automatic adjustment method |
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| CN201810365108.9A Pending CN108493965A (en) | 2018-04-18 | 2018-04-18 | Distribution transformer three-phase imbalance Automatic adjustment method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109995058A (en) * | 2019-03-27 | 2019-07-09 | 国网青海省电力公司黄化供电公司 | A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network |
| 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 |
| CN113972673A (en) * | 2021-09-29 | 2022-01-25 | 国网山东省电力公司营销服务中心(计量中心) | Intelligent perception inspection system for transformer area line loss |
| CN114006468A (en) * | 2021-10-19 | 2022-02-01 | 国网山东省电力公司营销服务中心(计量中心) | Platform district power consumption information analysis system |
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| CN105226684A (en) * | 2015-09-29 | 2016-01-06 | 国电南瑞科技股份有限公司 | A kind of low voltage electric network three-phase imbalance control method based on phase-change switch |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109995058A (en) * | 2019-03-27 | 2019-07-09 | 国网青海省电力公司黄化供电公司 | A kind of device and its workflow of the improvement three-phase imbalance for low voltage electric network |
| 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 |
| CN113972673A (en) * | 2021-09-29 | 2022-01-25 | 国网山东省电力公司营销服务中心(计量中心) | Intelligent perception inspection system for transformer area line loss |
| CN113972673B (en) * | 2021-09-29 | 2023-09-22 | 国网山东省电力公司营销服务中心(计量中心) | Intelligent perception inspection system for line loss of transformer area |
| CN114006468A (en) * | 2021-10-19 | 2022-02-01 | 国网山东省电力公司营销服务中心(计量中心) | Platform district power consumption information analysis system |
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