CN108695866A - It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device - Google Patents
It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device Download PDFInfo
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- CN108695866A CN108695866A CN201810770904.0A CN201810770904A CN108695866A CN 108695866 A CN108695866 A CN 108695866A CN 201810770904 A CN201810770904 A CN 201810770904A CN 108695866 A CN108695866 A CN 108695866A
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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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Abstract
The present invention discloses the zero phase-change switch type three-phase load Automatic adjustment method such as a kind of and device, is related to technical field of power systems, includes the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve of acquisition distribution transformer;It determines three-phase load unbalance degree, searches the equal automatic phase-change switch of zero low-voltage load and judge to load the three-phase load unbalance degree after transfer in advance that needs switch;Low-pressure side suitable for taiwan area distribution transformer, it is mainly used for the alternate total load of real-time, automatic distribution, adjustment (equilibrium) three, it is allowed to tend to state in a basic balance, its dynamic equilibrium degree reaches optimum value, the electric current flowed through in zero curve is minimum, to which the loss on transmission of transformer and the line loss of low-voltage supply line be greatly reduced, improve the total load ability of transformer, simultaneously, the supply voltage (part solves the problems, such as end low-voltage) of low-voltage circuit end can also be promoted, to supplying, power quality is significantly improved, improvement result.
Description
Technical field
The present invention relates to technical field of power systems more particularly to the zero phase-change switch type three-phase load such as a kind of automatic adjustments
Method and device.
Background technology
In power distribution station, transformer is responsible for the important task of distribution and power transmission, is the central hub of power distribution station.
The circuit network of power distribution station is then the channel of the transmission electric energy of transformer.Science, rational circuit network structure is transformation
The important guarantee of safe, the high-quality and low damage power supply of device.And three-phrase burden balance is both balance taiwan area circuit network structure conjunction
The important basis of rationality is also the basic demand of transformer normal operation, and can three-phase load balance, and is not only related to transformer
The reliability and stability of power supply, and it is related to the proportion of goods damageds of transformer-supplied.Currently during operation of power networks, three-phase is not
Balance has become normality.Three-phase imbalance can bring transformer loss increase, zero-sequence current excessive, and localized metallic part temperature rose
It is high even to blow circuit, burn the serious consequences such as transformer.And three-phase imbalance and low-voltage, low power factor etc. are deposited extremely
In apparent correlation, therefore, carrying out targetedly transformation to three-phase imbalance seems particularly necessary.
According to"Power distribution network O&M regulation"(Q/GDW 1519-2014) is provided, the load unbalanced degree of distribution transformer is answered
Meet:The load unbalanced degree of Yyn0 wiring transformers is not more than 15%, and neutral line current is not more than the 25% of transformer rated current;
The load unbalanced degree of Dyn11 wiring transformers is not more than 25%, and neutral line current is not more than the 40% of transformer rated current.
Currently, having for the mode of adjusting three-phase load unbalance following several:
1, it manually relocates Load adjustment
This scheme utilization rate highest, but its human input is big, need to cut off customer power supply, and be difficult to adapt to load for a long time
Changing rule;
2, it is compensated by SVG static synchronous compensator
This scheme only compensates electric current by output and realizes that distribution low-voltage exports three-phrase burden balance, cannot fundamentally solve
Actual load equilibrium assignment problem;This scheme construction cost is high, and when use has to pass through sufficient economic technology demonstration;
3, capacitive three-phase load self-checking device (alternate reactive power compensator)
This scheme is only shifted by alternate power and realizes that distribution low-voltage exports three-phrase burden balance, cannot fundamentally be solved
The assignment problem of actual load equilibrium, the power distribution station of configured conventional low voltage reactive power compensator should not install such dress again
It sets;
Invention content
The present invention is directed to prior art problem, provides the zero phase-change switch type three-phase load Automatic adjustment method such as a kind of and dress
It sets, can solve the problems, such as three-phase load unbalance from load-side, it is real to reduce the loss on transmission of transformer and the line loss of low-voltage supply line
The purpose of existing safety and economic operation.
To achieve the goals above, the present invention proposes a kind of equal zero phase-change switch type three-phase load Automatic adjustment method, packet
Include following steps:
S10, the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve for acquiring distribution transformer;
S20, three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
S30, search need switch etc. the automatic phase-change switch of zero low-voltage load;
S40, the pre- three-phase load unbalance degree judged after load transfer;
S50, load transfer is completed.
Preferably, in step slo, further include:Collect the parameter and state of each phase-change switch of taiwan area by radio communication.
Preferably, between step S20 and step S30, further include:
Whether three-phase load unbalance degree determined by S60, judgement is greater than the set value, if so, starting timing;Otherwise,
Time resets and returns to step S20.
Preferably, after step S60, further include:
S70, judge whether timing time is greater than the set value, if so, thening follow the steps S30, otherwise, return to step
S20。
Preferably, the step S40, specifically includes:
S401, judge whether the three-phase load unbalance degree after load transfer is less than identified three-phase load unbalance
Otherwise degree, returns to step S20 if so, executing commutation instruction.
The present invention also proposes a kind of Deng zero phase-change switch type three-phase load self-checking device, including be used for data acquisition and
The commutation terminal and the automatic phase-change switch of zero low-voltage load, the commutation terminal such as multiple of three-phase load unbalance degree monitoring are set
It is placed in the low tension outlet side of distribution transformer, the equal automatic phase-change switch of zero low-voltage load is set to the user along branch
Front end, commutation terminal and waiting are attached by power carrier or wireless mode between the automatic phase-change switch of zero low-voltage load, with
Load transfer is executed for equal automatic phase-change switch of zero low-voltage load, the commutation terminal is connected by network and monitoring client
It connects.
Preferably, the automatic phase-change switch of equal zero low-voltage load, number is according to taiwan area transformer capacity and user
Number determines.
Preferably, the commutation terminal, including:Shell, processor, memory, display screen, LED light, button and wiring
Terminal;The surface of shell is provided with display screen, LED light and button, and enclosure interior is provided with processor and memory, shell
Lower end is provided with connecting terminal, using the three-phase and four-line mode of connection.
Preferably, the automatic phase-change switch of equal zero low-voltage load, it is built-in:Under-voltage protection alarm unit, overvoltage protection
Alarm unit, overload protection alarm unit and load short circuits protect alarm unit.
Preferably, the memory is coupled to the processor and is stored with instruction, and the instruction is by described
Processor makes described equal zero phase-change switch type three-phase load self-checking device execution following action when executing:
Acquire the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve of distribution transformer;
Three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
Search the phase-change switch for needing to switch;
The pre- three-phase load unbalance degree judged after load transfer;
Complete load transfer.
A kind of equal zero phase-change switch type three-phase load Automatic adjustment method of present invention proposition and device, are suitable for taiwan area distribution
The low-pressure side (the 380V/220V low-voltage distribution systems of three-phase four-wire system) of transformer, is mainly used for real-time, automatic distribution, adjustment
The alternate total load of (equilibrium) three is allowed to tend to state in a basic balance, and dynamic equilibrium degree reaches optimum value, flows through in zero curve
Electric current is minimum, to which the loss on transmission of transformer and the line loss of low-voltage supply line be greatly reduced, improves the total load of transformer
Ability, at the same time it can also promote the supply voltage (part solves the problems, such as end low-voltage) of low-voltage circuit end, to confession, electricity consumption
Quality is significantly improved, improvement result.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the medium zero phase-change switch type three-phase load Automatic adjustment method flow chart of an embodiment of the present invention;
Fig. 2 is the medium zero phase-change switch type three-phase load self-checking device system construction drawing of an embodiment of the present invention;
Fig. 3 is the automatic phase-change switch scheme of installation of medium zero low-voltage load of an embodiment of the present invention;
Fig. 4 is commutation terminal front view in an embodiment of the present invention;
Fig. 5 is the automatic phase-change switch front view of medium zero low-voltage load of an embodiment of the present invention;
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the embodiment of the present invention directionality instruction (such as up, down, left, right, before and after ...),
Then directionality instruction be only used for explaining relative position relation under a certain particular pose (as shown in the picture) between each component,
Motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If in addition, relating to the description of " first ", " second " etc. in the embodiment of the present invention, it is somebody's turn to do " first ", " second " etc.
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.In addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, when the knot that conflicting or cannot achieve when will be understood that this technical solution occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection domain within.
The present invention proposes a kind of equal zero phase-change switch type three-phase load Automatic adjustment method;
In a kind of preferred embodiment of the present invention, as shown in Figure 1, including the following steps:
S10, the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve for acquiring distribution transformer;By radio communication
Collect the parameter and state of each phase-change switch of taiwan area;
In the embodiment of the present invention, commutation terminal (master controller) installation and distribution transformer low tension outlet side monitor and adopt
Collect outlet side circuit three-phase voltage, three-phase current, periodically inquires phase-change switch real-time status, installation point three-phase voltage current and list
Phase load size.
S20, three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
The calculation formula of three-phase load unbalance degree K is as follows:
K=(Imax-Imin) ÷ Imax × 100% (1)
Wherein, Imax is three-phase maximum current, and Imin is three-phase minimum current;
Need transferring load electric current Icd calculation formula as follows:
Icd=1/2 (Imax-Imin) (2)
Record loads maximum separate and load minimum separate respectively Fmax, Fmin;
Whether three-phase load unbalance degree K determined by S60, judgement is greater than the set value Kset, if so, start the time after
Electric appliance Timer timing;Otherwise, it resets time relay Timer and returns to step S20.
S70, judge whether timing time is greater than the set value Tset, if so, thening follow the steps S30, otherwise, return executes step
Rapid S20.
S30, search need switch etc. the automatic phase-change switch of zero low-voltage load;
In the embodiment of the present invention, the phase-change switch (Fx=Fmax, and Ix is closest to Icd) for needing to switch, Fx are searched
It is separate where x-th of phase-change switch load;Ix is the contained load of the phase-change switch.
S40, after finding the switch for needing to switch, carry out the pre- three-phase load unbalance degree judged after load transfer;Tool
Body is:
S401, judge whether the three-phase load unbalance degree K1 after load transfer is less than identified three-phase load unbalance
K is spent, if so, executing commutation instruction, otherwise, returns to step S20.
K1=(Imax1-Imin1) ÷ Imax1 × 100% (3)
Wherein, Imax1=max (Imax-Icd, Iz, Imin+Icd), Imin1=min (Imax-Icd, Iz, Imin+
Icd), Iz is non-phase-modifying current;
S50, load transfer is completed.
In the embodiment of the present invention, work as K1<When K, carries out corresponding commutation instruction and issue, x-th of phase-change switch is loaded from Fmax
It is transferred to Fmin, completes primary load transfer.
The present invention also proposes a kind of Deng zero phase-change switch type three-phase load self-checking device;
In a kind of preferred embodiment of the present invention, (1- taiwan area main transformers as shown in Figures 2 and 3;2- single-phase loads;3- commutations are opened
It closes;4- three-phase loads), which includes the commutation terminal (imbalance for data acquisition and the monitoring of three-phase load unbalance degree
Automatic regulation controller) and the automatic phase-change switch of zero low-voltage load, the commutation terminal such as multiple be set to distribution transformer
Low tension outlet side, the described equal automatic phase-change switch of zero low-voltage load is set to the user front end along branch, commutation terminal
It is attached by power carrier or wireless mode between equal automatic phase-change switch of zero low-voltage load, for waiting zero low-voltage load
Automatic phase-change switch executes load transfer, and the commutation terminal is attached by network and monitoring client.
In the embodiment of the present invention, distribution transforming outlet is equipped with commutation terminal, realize the acquisition of taiwan area data, taiwan area load monitoring,
The functions such as unbalance control, distant place communication, main function:(1) distribution transformer low tension outlet busbar and branched line are detected
Three-phase voltage and electric current;(2) collect the electric current and state of each outlet phase-change switch in taiwan area by radio communication;(3) basis
Aggregated data judges uneven adjustable strategies and issues commutation order to each outlet phase-change switch;(4) pass through the communication parties such as GPRS
Data are uploaded monitoring system of distribution network (including PC machine and mobile app) by formula;
In the embodiment of the present invention, in zero automatic phase-change switches such as user front end installations along branch, itself band can be monitored and carried
The information on load in circuit, and commutation operation is carried out according to the commutation order that intelligent commutation terminal issues;Main function:(1) in real time
Load data, monitoring load condition are acquired, judges load attribute;(2) data upload intelligent distribution transforming control terminal in real time;(3) it connects
The commutation order that commutation terminal issues is received, is determined to execute commutation operation according to local actual conditions;
In a kind of preferred embodiment of the present invention, as shown in figure 4, the commutation terminal, including:Shell, processor, storage
Device, display screen (160*160 dot matrixs back-light liquid crystal display screen), LED light, button and connecting terminal;The surface of shell is set
It is equipped with display screen, LED light and button, enclosure interior is provided with processor and memory, and shell lower end is provided with connecting terminal, adopts
With the three-phase and four-line mode of connection.
In the embodiment of the present invention, the memory is coupled to the processor and is stored with instruction, the instruction
The equal zero phase-change switch type three-phase load self-checking device is made to execute following action when being executed by the processor:
Acquire the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve of distribution transformer;
Three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
Search the phase-change switch for needing to switch;
The pre- three-phase load unbalance degree judged after load transfer;
Complete load transfer.
In the embodiment of the present invention, node terminal includes:The input of A phase current mutual inductors, A phase voltages, A phase current mutual inductors are defeated
Go out, the input of B phase current mutual inductors, the output of B phase voltages, B phase current mutual inductors, the input of C phase current mutual inductors, C phase voltages, C phases
Current transformer output, N phase voltages, also set up two spare connecting terminals;In addition, being additionally provided with RS-485 interfaces;
In the embodiment of the present invention, commutation terminal needs, mounted on the low tension outlet side of taiwan area distribution transforming, to be preferably installed in original
JP cabinets in, or in the rainproof box apart from ground level 1.8m of electric pole nearby;Mounted commutation terminal can be certainly
The unbalance condition data of the dynamic real-time display distribution transforming, in conjunction with the distribution transforming historical data being ready for, the comprehensive analysis distribution transforming system
System generates unbalanced main cause, and the installation point of zero phase-change switch such as suitable is selected in the distribution transforming line topological figure;
The selection principle of the installation point respectively switched is as follows:
(1) installation facility is convenient for safety operation;
(2) before supply line in, latter end all should have reconnaissance (it is recommended that ratio:2:3:5 or 3:3:4);
In a kind of preferred embodiment of the invention, as shown in figure 5, the automatic phase-change switch of equal zero low-voltage load, including:
Shell, display screen (160*160 dot matrixs back-light liquid crystal display screen), LED light, button and connecting terminal;The surface of shell
It is provided with display screen, LED light and button, shell lower end is provided with connecting terminal, built-in:Under-voltage protection alarm unit, overvoltage are protected
It protects alarm unit, overload protection alarm unit and load short circuits and protects alarm unit.
In the embodiment of the present invention, wait the automatic phase-change switch number of zero low-voltage load according to taiwan area transformer capacity and number of users
It determines, the families the zero phase-change switch band 4-6 such as 120A, the families the zero phase-change switch band 8-12 such as 250A (quantity pacifies actual load adjustment);
In the embodiment of the present invention, the automatic phase-change switch of zero low-voltage load is waited, installation site should be higher than that 1.8m, in surrounding air
Answer non-corrosive gas;Deng the automatic phase-change switch of zero low-voltage load and commutation terminal and wait the automatic phase-change switch of zero low-voltage load it
Between accessible communication distance be 2000 meters, each equal automatic phase-change switch of zero low-voltage load has communication relay function, installation
Afterwards automatically with commutation terminal called group net operation;It is less than or equal to 10ms Deng the zero low-voltage load automatic phase-change switch commutation time, no
With disconnected user, the reset of common electric will not be caused and restarted, damage will not be generated to electric appliance;
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (10)
1. a kind of equal zero phase-change switch type three-phase load Automatic adjustment method, which is characterized in that include the following steps:
S10, the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve for acquiring distribution transformer;
S20, three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
S30, search need switch etc. the automatic phase-change switch of zero low-voltage load;
S40, the pre- three-phase load unbalance degree judged after load transfer;
S50, load transfer is completed.
2. equal zero phase-change switch type three-phase load Automatic adjustment method according to claim 1, which is characterized in that in step
In S10, further include:Collect the parameter and state of each phase-change switch of taiwan area by radio communication.
3. equal zero phase-change switch type three-phase load Automatic adjustment method according to claim 1, which is characterized in that in step
Between S20 and step S30, further include:
Whether three-phase load unbalance degree determined by S60, judgement is greater than the set value, if so, starting timing;Otherwise, the time
It resets and returns to step S20.
4. equal zero phase-change switch type three-phase load Automatic adjustment method according to claim 3, which is characterized in that in step
After S60, further include:
S70, judge whether timing time is greater than the set value, if so, thening follow the steps S30, otherwise, return to step S20.
5. equal zero phase-change switch type three-phase load Automatic adjustment method according to claim 1, which is characterized in that described
Step S40, specifically includes:
S401, judge whether the three-phase load unbalance degree after load transfer is less than identified three-phase load unbalance degree, if
It is then to execute commutation instruction, otherwise, returns to step S20.
6. a kind of equal zero phase-change switch type three-phase load self-checking device, which is characterized in that including being used for data acquisition and three
The commutation terminal of phase load degree of unbalancedness monitoring and multiple equal automatic phase-change switches of zero low-voltage load, the commutation terminal are arranged
In the low tension outlet side of distribution transformer, before the equal automatic phase-change switch of zero low-voltage load is set to the user along branch
End, commutation terminal and waiting are attached by power carrier or wireless mode between the automatic phase-change switch of zero low-voltage load, for
Load transfer is executed Deng the automatic phase-change switch of zero low-voltage load, the commutation terminal is attached by network and monitoring client.
7. equal zero phase-change switch type three-phase load self-checking device according to claim 6, which is characterized in that described
Deng the automatic phase-change switch of zero low-voltage load, number is determined according to taiwan area transformer capacity and number of users.
8. equal zero phase-change switch type three-phase load self-checking device according to claim 6, which is characterized in that described
Commutation terminal, including:Shell, processor, memory, display screen, LED light, button and connecting terminal;The surface of shell is set
It is equipped with display screen, LED light and button, enclosure interior is provided with processor and memory, and shell lower end is provided with connecting terminal, adopts
With the three-phase and four-line mode of connection.
9. equal zero phase-change switch type three-phase load self-checking device according to claim 6, which is characterized in that described
It is built-in Deng the automatic phase-change switch of zero low-voltage load:Under-voltage protection alarm unit, overvoltage protection alarm unit, overload protection alarm
Unit and load short circuits protect alarm unit.
10. equal zero phase-change switch type three-phase load self-checking device according to claim 8, which is characterized in that described
Memory, be coupled to the processor and be stored with instruction, the instruction makes institute when being executed by the processor
It the zero phase-change switch type three-phase load self-checking device such as states and executes following action:
Acquire the low tension outlet side line road three-phase voltage value and three-phase electricity flow valuve of distribution transformer;
Three-phase load unbalance degree is determined according to three-phase electricity flow valuve;
Search the phase-change switch for needing to switch;
The pre- three-phase load unbalance degree judged after load transfer;
Complete load transfer.
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| CN201810770904.0A CN108695866A (en) | 2018-07-13 | 2018-07-13 | It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device |
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| CN201810770904.0A CN108695866A (en) | 2018-07-13 | 2018-07-13 | It is a kind of to wait zero phase-change switch type three-phase load Automatic adjustment method and device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109904864A (en) * | 2018-12-21 | 2019-06-18 | 贵州电网有限责任公司凯里供电局 | A kind of self-decision type three-phase self-balance load switch and its application method |
| CN110112759A (en) * | 2019-05-20 | 2019-08-09 | 浙江蓝嘉电力科技有限公司 | Phase-change switch type three-phase imbalance administers intelligent apparatus |
| CN110187232A (en) * | 2019-05-08 | 2019-08-30 | 国网江苏省电力有限公司泰州供电分公司 | A kind of intelligent monitoring device for matching electricity consumption synchronous data sampling suitable for low-voltage platform area |
| CN110224417A (en) * | 2019-06-11 | 2019-09-10 | 河南隆鑫电力设备有限公司 | A kind of low-voltage network three-phase load unbalance automatic adjustment system |
| CN110417034A (en) * | 2019-06-21 | 2019-11-05 | 国网上海市电力公司 | A kind of control method suitable for intelligent load commutation |
| CN111209673A (en) * | 2020-01-08 | 2020-05-29 | 云南电网有限责任公司昆明供电局 | Design method of novel wide-width voltage-regulating distribution transformer |
| CN111564853A (en) * | 2020-06-11 | 2020-08-21 | 国网山东省电力公司电力科学研究院 | Automatic phase change system and method for low-voltage phase change switch |
| CN114374155A (en) * | 2021-12-21 | 2022-04-19 | 国网湖北省电力有限公司恩施供电公司 | Load switch commutation device and three-phase load unbalance automatic commutation leveling system thereof |
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| CN109904864A (en) * | 2018-12-21 | 2019-06-18 | 贵州电网有限责任公司凯里供电局 | A kind of self-decision type three-phase self-balance load switch and its application method |
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| CN110187232B (en) * | 2019-05-08 | 2021-09-03 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring device suitable for synchronous acquisition of power distribution and utilization data of low-voltage transformer area |
| CN110112759A (en) * | 2019-05-20 | 2019-08-09 | 浙江蓝嘉电力科技有限公司 | Phase-change switch type three-phase imbalance administers intelligent apparatus |
| CN110224417A (en) * | 2019-06-11 | 2019-09-10 | 河南隆鑫电力设备有限公司 | A kind of low-voltage network three-phase load unbalance automatic adjustment system |
| CN110417034A (en) * | 2019-06-21 | 2019-11-05 | 国网上海市电力公司 | A kind of control method suitable for intelligent load commutation |
| CN111209673A (en) * | 2020-01-08 | 2020-05-29 | 云南电网有限责任公司昆明供电局 | Design method of novel wide-width voltage-regulating distribution transformer |
| CN111564853A (en) * | 2020-06-11 | 2020-08-21 | 国网山东省电力公司电力科学研究院 | Automatic phase change system and method for low-voltage phase change switch |
| CN114374155A (en) * | 2021-12-21 | 2022-04-19 | 国网湖北省电力有限公司恩施供电公司 | Load switch commutation device and three-phase load unbalance automatic commutation leveling system thereof |
| CN114374155B (en) * | 2021-12-21 | 2023-09-05 | 国网湖北省电力有限公司恩施供电公司 | Load switch commutation device and three-phase load unbalance automatic commutation leveling system thereof |
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