CN107895958A - A kind of regulating system of three-phase imbalance - Google Patents

A kind of regulating system of three-phase imbalance Download PDF

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Publication number
CN107895958A
CN107895958A CN201711183860.3A CN201711183860A CN107895958A CN 107895958 A CN107895958 A CN 107895958A CN 201711183860 A CN201711183860 A CN 201711183860A CN 107895958 A CN107895958 A CN 107895958A
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China
Prior art keywords
regulating system
phase
phase imbalance
power
sub
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Pending
Application number
CN201711183860.3A
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Chinese (zh)
Inventor
代辉
李御空
刘永强
温海康
李文超
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Chengdu Han Du Science And Technology Ltd
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Chengdu Han Du Science And Technology Ltd
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Priority to CN201711183860.3A priority Critical patent/CN107895958A/en
Publication of CN107895958A publication Critical patent/CN107895958A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/26Arrangements for eliminating or reducing asymmetry in polyphase networks
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50Arrangements for eliminating or reducing asymmetry in polyphase networks

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses regulate and control method, including main regulation module, sub- regulating system, and following steps, step 1 based on three-phase imbalance:By the main regulation module, three-phase imbalance regulation is carried out;Step 2:Compare the actual power of the sub- regulating system and the power threshold of setting, when the actual power of group regulating system is more than power threshold, connect general supply module;When the actual power of group regulating system is less than or equal to power threshold, power network step 3 is put into:When the general supply module receives outer medium import information, it is judged as warning message, starts alarm and start.When the capacity of low voltage distribution transformer is larger, and when three-phase imbalance situation is more serious, separate unit three-phase imbalance regulating system can not meet the requirement for adjusting three-phase imbalance, therefore, need to propose a kind of three-phase imbalance regulating system input control method, for quickly improving the situation of serious three-phase imbalance, the power quality of user is improved by this method.

Description

A kind of regulating system of three-phase imbalance
Technical field
The present invention relates to regulating system, and in particular to a kind of regulating system of three-phase imbalance.
Background technology
Three-phase current or voltage magnitude is inconsistent in power system, and difference in magnitude exceedes prescribed limit, referred to as three-phase It is uneven.Low-voltage network is mainly the voltage network that power supply is depressured through 10KV/0.4KV distribution transformers, because power distribution network is Three-phase is mixed with single-phase user with power network, therefore voltage distribution net is powered frequently with three-phase four-wire circuit.Distribution transformer is defeated Go out the low-voltage alternating-current bus of side joint three-phase low-voltage power distribution network, low-voltage alternating-current bus distributes a plurality of low pressure through low-voltage distribution switch and gone out Line.Low-pressure line-outgoing combination power distribution network actual loading situation is divided into three-phase electricity consumption branch line and single-phase electricity consumption branch line, or three-phase with it is single-phase Mix electricity consumption branch line.Wherein, single-phase electricity consumption branch line will be separately dispensed into three-phase distribution ac bus according to single-phase load situation A, B, C three-phase in a certain item and N line in, form single phase power supply loop.When the single-phase load in A, B, C three-phase is unequal When, distribution transformer output will produce three-phase imbalance phenomenon.
In the prior art, system includes intelligent control unit, power subsystem, Signal acquiring and processing unit, power conversion Unit, filtering and charhing unit, filtering and energy-storage units, display and operating unit.Filtering and the corresponding terminal point of charhing unit Not Lian Jie transformer outlet side A, B, C three-phase alternating current and N lines, filtering be connected with charhing unit power conversion unit and filter and Energy-storage units, the electric power incoming line of power subsystem are connected with filtering with a certain phase in A, B, C three-phase in charhing unit and N lines, And the required voltages such as intelligent main control unit, power conversion unit, display and operating unit are delivered into each power unit.Signal Collection be provided with multiple sensors in processing unit, be separately mounted in A, B, C three-phase line, voltage for measuring system, The signals such as electric current.Display is connected with operating unit by shielding line with intelligent control unit, is carried out by standard communication protocol real When data exchange.Intelligent control unit is controlled by signal wire and each controlled unit, coordinates the normal fortune of complete machine OK.
When the capacity of low voltage distribution transformer is larger, and three-phase imbalance situation is more serious, separate unit three-phase imbalance Regulating system can not meet the requirement for adjusting three-phase imbalance, it is, therefore, desirable to provide a kind of three-phase imbalance regulating system is put into Control method, for quickly improving the situation of serious three-phase imbalance.
The content of the invention
The technical problems to be solved by the invention are and the three-phase imbalance feelings when the capacity of low voltage distribution transformer is larger When condition is more serious, separate unit three-phase imbalance regulating system can not meet the requirement for adjusting three-phase imbalance, it is, therefore, desirable to provide one Kind three-phase imbalance regulating system input control method, for quickly improving the situation of serious three-phase imbalance, it is therefore intended that carry For a kind of regulating system of three-phase imbalance, solution is larger when the capacity of low voltage distribution transformer, and three-phase imbalance situation When more serious, separate unit three-phase imbalance regulating system can not meet the requirement for adjusting three-phase imbalance, it is, therefore, desirable to provide a kind of Three-phase imbalance regulating system input control method, for quickly improving the situation of serious three-phase imbalance.
The problem of.
The present invention is achieved through the following technical solutions:
Method, including main regulation module, sub- regulating system, and following steps, step 1 are regulated and controled based on three-phase imbalance:Will The main regulation module, carry out three-phase imbalance regulation;Step 2:Compare actual power and the setting of the sub- regulating system Power threshold, when the actual power of group regulating system is more than power threshold, connect general supply module;The reality of group regulating system When border power is less than or equal to power threshold, power network step 3 is put into:When the general supply module receives outer medium import information, It is judged as warning message, starts alarm and start.When the capacity of low voltage distribution transformer is larger, and three-phase imbalance situation compared with When serious, separate unit three-phase imbalance regulating system can not meet the requirement for adjusting three-phase imbalance, it is, therefore, desirable to provide one kind three Mutually uneven regulating system input control method, for quickly improving the situation of serious three-phase imbalance, is improved by this method The power quality of user.
Further, the main regulation module includes intelligent control unit, and the intelligent control unit gathers sub- regulating system The electric current of maximum current phase and the electric current of minimum current phase, obtain three-phase current unbalance degree actual value.
Further, according to three-phase current unbalance degree actual value, it is poor to calculate three-phase current unbalance degree set-point work.
The present invention compared with prior art, has the following advantages and advantages:
1st, a kind of regulating system of three-phase imbalance of the present invention, the quick flat of existing distribution transformer outlet side three-phase imbalance Sliding regulation, the loss that distribution line can be effectively reduced, the output for improving distribution transformer and raising power distribution system secure fortune Row ability;
2nd, a kind of regulating system of three-phase imbalance of the present invention, according to three-phase current unbalance degree actual value, calculates three It is poor that phase current degree of unbalancedness set-point is made;
3rd, a kind of regulating system of three-phase imbalance of the present invention, quickly improve the situation of serious three-phase imbalance, pass through this Method improves the power quality of user.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment, the present invention is made Further to describe in detail, exemplary embodiment of the invention and its explanation are only used for explaining the present invention, are not intended as to this The restriction of invention.
Embodiment
A kind of regulating system of three-phase imbalance of the present invention, including main regulation module, sub- regulating system, and following steps, Step 1:By the main regulation module, three-phase imbalance regulation is carried out;Step 2:Compare the actual power of the sub- regulating system With the power threshold of setting, when the actual power of group regulating system is more than power threshold, general supply module is connected;Group is adjusted When the actual power of system is less than or equal to power threshold, power network step 3 is put into:The general supply module receives outer medium and imported During information, it is judged as warning message, starts alarm and start.Further, the main regulation module includes intelligent control unit, institute The electric current of maximum current phase and the electric current of minimum current phase that intelligent control unit gathers sub- regulating system are stated, obtains three-phase current Degree of unbalancedness actual value.According to three-phase current unbalance degree actual value, it is poor to calculate three-phase current unbalance degree set-point work.Three Mutually uneven regulating system input control method, for quickly improving the situation of serious three-phase imbalance, is improved by this method The power quality of user.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include Within protection scope of the present invention.

Claims (3)

  1. A kind of 1. regulating system of three-phase imbalance, it is characterised in that:Including main regulation module, sub- regulating system, and following step Suddenly,
    Step 1:By the main regulation module, three-phase imbalance regulation is carried out;
    Step 2:Compare the actual power of the sub- regulating system and the power threshold of setting, the actual power of group regulating system During more than power threshold, general supply module is connected;When the actual power of group regulating system is less than or equal to power threshold, input Power network
    Step 3:When the general supply module receives outer medium import information, it is judged as warning message, starts alarm and start.
  2. A kind of 2. regulating system of three-phase imbalance according to claim 1, it is characterised in that:The main regulation module bag Include intelligent control unit, the intelligent control unit gathers the electric current and minimum current phase of the maximum current phase of sub- regulating system Electric current, obtain three-phase current unbalance degree actual value.
  3. A kind of 3. regulating system of three-phase imbalance according to claim 2, it is characterised in that:It is uneven according to three-phase current Weighing apparatus degree actual value, it is poor to calculate three-phase current unbalance degree set-point work.
CN201711183860.3A 2017-11-23 2017-11-23 A kind of regulating system of three-phase imbalance Pending CN107895958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711183860.3A CN107895958A (en) 2017-11-23 2017-11-23 A kind of regulating system of three-phase imbalance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711183860.3A CN107895958A (en) 2017-11-23 2017-11-23 A kind of regulating system of three-phase imbalance

Publications (1)

Publication Number Publication Date
CN107895958A true CN107895958A (en) 2018-04-10

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Application Number Title Priority Date Filing Date
CN201711183860.3A Pending CN107895958A (en) 2017-11-23 2017-11-23 A kind of regulating system of three-phase imbalance

Country Status (1)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106816883A (en) * 2017-03-06 2017-06-09 天津平高智能电气有限公司 Three-phase imbalance regulating system parallel connection input coefficient, control method and device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106816883A (en) * 2017-03-06 2017-06-09 天津平高智能电气有限公司 Three-phase imbalance regulating system parallel connection input coefficient, control method and device

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Application publication date: 20180410

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