CN109038608A - A kind of complex electric energy comprehensive quality control system - Google Patents

A kind of complex electric energy comprehensive quality control system Download PDF

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Publication number
CN109038608A
CN109038608A CN201810917080.5A CN201810917080A CN109038608A CN 109038608 A CN109038608 A CN 109038608A CN 201810917080 A CN201810917080 A CN 201810917080A CN 109038608 A CN109038608 A CN 109038608A
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CN
China
Prior art keywords
load
phase
control
grid side
primary circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810917080.5A
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Chinese (zh)
Inventor
蒋钱良
黄颖博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Baigu Electrical Technology Co Ltd
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Zhejiang Baigu Electrical Technology Co Ltd
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Priority to CN201810917080.5A priority Critical patent/CN109038608A/en
Publication of CN109038608A publication Critical patent/CN109038608A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H02J3/18Arrangements for adjusting, eliminating or compensating reactive power in networks
    • 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
    • H02J3/01Arrangements for reducing harmonics or ripples
    • 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
    • Y02E40/30Reactive power compensation
    • 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
    • Y02E40/40Arrangements for reducing harmonics
    • 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 present invention relates to a kind of complex electric energy comprehensive quality control systems, phase-change switch including reactive power compensator and more than one, control module includes data acquisition and procession unit, remote communication interface and control and monitoring unit, control and monitoring unit are according to data acquisition and procession unit, operation obtains the charge value of grid side and load-side respectively, when the tri-phase unbalance factor of grid side or load-side exceeds specified value, control and the phase-change switch of monitoring unit control load-side carry out commutation, so that the tri-phase unbalance factor of grid side or load-side infinitely meets specified value;When the tri-phase unbalance factor of grid side or load-side is in allowable range, the primary circuit is output control signals to monitoring unit by controlling, the active inverter split-phase in primary circuit is set to export compensation electric current, so that grid side tri-phase unbalance factor infinitely tends to balance.Grid side can be achieved in the present invention and the tri-phase unbalance factor of load-side infinitely tends to balance.

Description

A kind of complex electric energy comprehensive quality control system
Technical field
The present invention relates to a kind of complex electric energy comprehensive quality control systems.
Background technique
In power distribution network, there is various nonlinear-loads, such as capacitive, perception, impact, sensibility, by This brings a series of power quality problem to power distribution network, as tri-phase unbalance factor is high, power factor is low, voltage and current is abnormal Change, the positive and negative imbalance of voltage and current etc..To solve the above-mentioned problems, generally there are following methods:
1, passive reacance generator is taken selectively to compensate improvement specific in transformer output port and/or load side The reactive capability of capacity, has at low cost, but is unable to the variation of follow load, is easy to appear overfill and underfill.
2, it takes SVC reacance generator selective and step-type compensation is administered in transformer output port and/or born The specific reactive capability in lotus end can in real time, steppingly track small-scale load variations, and cost is than passive reacance generator Height, and it is unable to linear compensation improvement, it is easy to appear overfill and underfill.
3, take SVG (static reactive generator) that the tri-phase unbalance factor of transformer output port, optimization power can be administered Factor and voltage/current output waveform, moreover it is possible to linearly, the load variations of real-time tracking gamut, but transmission of electricity cannot be administered Three-phase load unbalance on route, line loss is big, and waste of energy is serious.
In conclusion Comprehensive is unable to upper type, linearly, combine grid side and load-side in real time Power quality problem.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, grid side and load-side can be combined by providing one kind, Comprehensively, in real time, linearly comprehensive treatment grid power quality, response is fast, the good complex electric energy comprehensive quality control system of effect.
To achieve the above object, the present invention uses such a complex electric energy comprehensive quality control system, including idle benefit The phase-change switch of device and more than one is repaid, the phase-change switch of the more than one can be respectively arranged at the single-phase of corresponding branch The front end of load, the reactive power compensator include primary circuit and control module, and the primary circuit includes successively connecting Breaker, pre-charge module, passive filter and the active inverter connect, the control module include
Data acquisition and procession unit, for acquiring and handling grid side three-phase voltage signal, grid side three-phase current letter Number and load-side current signal;
Remote communication interface exchanges information for the phase-change switch transmission control signal into system, and with backstage;
Control and monitoring unit, according to the data acquisition and procession unit, operation obtains grid side and load respectively The charge value of side, the charge value include voltage value, current value, power factor, harmonic value, the positive and negative degree of unbalancedness of voltage, electricity Flow positive and negative degree of unbalancedness, active power, reactive power, apparent capacity, voltage between phases degree of unbalancedness, three-phase current degree of unbalancedness, Alternate active power degree of unbalancedness, alternate reactive power degree of unbalancedness, alternate apparent capacity degree of unbalancedness, tri-phase unbalance factor, Leakage current, when the tri-phase unbalance factor of grid side or load-side exceeds specified value, the control and monitoring unit control are negative The phase-change switch for carrying side carries out commutation, so that the tri-phase unbalance factor of grid side or load-side infinitely meets specified value;Work as power grid When the tri-phase unbalance factor of side or load-side is in allowable range, output control signals to by the control with monitoring unit The primary circuit makes the active inverter split-phase in the primary circuit export compensation electric current, so that grid side three-phase Degree of unbalancedness infinitely tends to balance.
Particularly, when the power factor of grid side or load-side exceeds setting value, by the control and monitoring unit The primary circuit is output control signals to, so that the active inverter in the primary circuit is absorbed or is issued and meets the requirements Reactive current so that the power factor of grid side or load-side infinitely meet setting value requirement;When grid side or load-side When harmonic value exceeds setting value, the primary circuit is output control signals to by the control and monitoring unit, it is described Active inverter in primary circuit exports the harmonic current offseted with the harmonic current detected, so that grid side or load The harmonic value of side infinitely meets setting value requirement.Compared with the prior art, beneficial effects of the present invention are embodied in: by using with On structure design tri-phase unbalance factor is worked as by the unified acquisition of reactive power compensator, the charge value of operation grid side and load-side When beyond specified value, each phase-change switch is output control signals to through remote communication interface first, so that the commutation in system is opened Response action first is closed, the tri-phase unbalance factor of transmission line of electricity is preferentially adjusted, when tri-phase unbalance factor is in allowable range, The active inverter split-phase output reactive compensation electric current in primary circuit is controlled again, so that grid side tri-phase unbalance factor infinitely becomes In balance, the present invention improves the operational efficiency of transformer, reduces the loss of transmission line of electricity and the injustice of reactive power compensator Weigh pondage demand, and the tri-phase unbalance factor of grid side and load-side infinitely tends to balance, whole system power quality tune Better effect is saved, reliability is higher, realizes energy efficiency.
Particularly, the remote communication interface includes serial communication interface and Internet of Things network communication module, described Serial network communication interface includes RS232, RS485 and/or USB, and the Internet of Things network communication module includes power carrier Communication module, GPRS communication module, ethernet communication module and WIFI module.Idle benefit is convenient in design through the above structure It repays the phase-change switch of device and scene, communicated from the background.
Particularly, the reactive power compensator further includes optical communication interface, for the primary circuit with it is described Control module between control information and acquisition signal bridge joint.Design through the above structure, the control of reactive power compensator The control signal of molding block and the forceful electric power of primary circuit are kept apart, so that the control of reactive power compensator is relatively reliable.
Particularly, the control module further includes failure and protection location, and the data acquisition and procession module is adopted In switch state signal, temperature rise value, DC capacitor voltage value and the pre-charge module in the collection active inverter Protective switch status signal, and according to electrical interlocks principle and operating temperature allowable range, by the failure and protection Unit, which is respectively combined, outputs control signals to breaker, the pre-charge module and the active inverter.It is logical The design for crossing the above structure realizes that the defencive function of reactive power compensator is complete.
Detailed description of the invention
Fig. 1 is a kind of functional-block diagram of complex electric energy comprehensive quality control system of the present invention.
Specific embodiment
As shown in Figure 1, a kind of complex electric energy comprehensive quality control system, changing including reactive power compensator and more than one It mutually switchs, the phase-change switch of more than one can be respectively arranged at the front end of the single-phase load of corresponding branch, reactive power compensator packet Primary circuit and control module are included, primary circuit includes sequentially connected breaker ZK, pre-charge module, passive filter and has Source inventer, control module include
Data acquisition and procession unit, for acquiring and handling grid side three-phase voltage signal, grid side three-phase current letter Number and load-side current signal;
Remote communication interface exchanges information for the phase-change switch transmission control signal into system, and with backstage;
Control and monitoring unit, according to the data acquisition and procession unit, operation obtains grid side and load respectively The charge value of side, charge value include that voltage value, current value, power factor, harmonic value, the positive and negative degree of unbalancedness of voltage, electric current are positive and negative Degree of unbalancedness, reactive power, apparent capacity, voltage between phases degree of unbalancedness, three-phase current degree of unbalancedness, alternate has active power Function unbalanced power degree, alternate reactive power degree of unbalancedness, alternate apparent capacity degree of unbalancedness, tri-phase unbalance factor, leakage current, When the tri-phase unbalance factor of grid side or load-side exceeds specified value, the phase-change switch of control and monitoring unit control load-side Commutation is carried out, so that the tri-phase unbalance factor of grid side or load-side infinitely meets specified value;When the three of grid side or load-side When phase degree of unbalancedness is in allowable range, primary circuit is output control signals to monitoring unit by control, makes primary circuit In active inverter split-phase output compensation electric current so that grid side tri-phase unbalance factor infinitely tends to balance.
Particularly, it when the power factor of grid side or load-side exceeds setting value, is controlled by control and monitoring unit output Signal processed absorbs the active inverter in primary circuit or issues the reactive current met the requirements, so that electric to primary circuit The power factor of net side or load-side infinitely meets setting value requirement;When the harmonic value of grid side or load-side exceeds setting value When, primary circuit is output control signals to monitoring unit by control, the active inverter in primary circuit is exported and detected The harmonic current that offsets of harmonic current so that the harmonic value of grid side or load-side infinitely meets setting value requirement.
Remote communication interface includes serial communication interface and Internet of Things network communication module, and serial network communication interface includes RS232, RS485 and/or USB, Internet of Things network communication module include power carrier communication module, GPRS communication module, ether Network Communication module and WIFI module.
Reactive power compensator further includes optical communication interface, between primary circuit and control module control information with Acquire the bridge joint of signal.
Control module further includes failure and protection location, and data acquisition and procession module acquires the switch in active inverter Protective switch status signal in status signal, temperature rise value, DC capacitor voltage value and pre-charge module, and according to electrical interlocks Principle and operating temperature allowable range are respectively combined by failure and protection location and output control signals to breaker ZK, preliminary filling Electric module and active inverter.

Claims (6)

1. a kind of complex electric energy comprehensive quality control system, it is characterised in that: changing including reactive power compensator and more than one It mutually switchs, the phase-change switch of the more than one can be respectively arranged at the front end of the single-phase load of corresponding branch, the nothing Reactive power compensation installations include primary circuit and control module, and the primary circuit includes sequentially connected breaker, precharge mould Block, passive filter and active inverter, the control module include
Data acquisition and procession unit, for acquire and handle grid side three-phase voltage signal, grid side three-phase current signal and Load-side current signal;
Remote communication interface exchanges information for the phase-change switch transmission control signal into system, and with backstage;
Control and monitoring unit, according to the data acquisition and procession unit, operation obtains grid side and load-side respectively Charge value, the charge value include voltage value, current value, power factor, harmonic value, the positive and negative degree of unbalancedness of voltage, electric current just It is negative degree of unbalancedness, active power, reactive power, apparent capacity, voltage between phases degree of unbalancedness, three-phase current degree of unbalancedness, alternate Active power degree of unbalancedness, alternate reactive power degree of unbalancedness, alternate apparent capacity degree of unbalancedness, tri-phase unbalance factor, electric leakage Stream, when the tri-phase unbalance factor of grid side or load-side exceeds specified value, the control and monitoring unit control load-side Phase-change switch carry out commutation so that the tri-phase unbalance factor of grid side or load-side infinitely meets specified value;When grid side or When the tri-phase unbalance factor of load-side is in allowable range, output control signals to by the control and monitoring unit described Primary circuit, so that active inverter split-phase in the primary circuit is exported compensation electric current, so that grid side three-phase is uneven Weighing apparatus degree infinitely tends to balance.
2. complex electric energy comprehensive quality control system according to claim 1, it is characterised in that: when grid side or load-side Power factor when exceeding setting value, the primary circuit is output control signals to by the control and monitoring unit, is made Active inverter in the primary circuit absorbs or issues the reactive current met the requirements, so that grid side or load-side Power factor infinitely meets setting value requirement;When the harmonic value of grid side or load-side exceeds setting value, by the control The primary circuit is output control signals to monitoring unit, active inverter output and detection in the primary circuit The harmonic current that harmonic current out offsets, so that the harmonic value of grid side or load-side infinitely meets setting value requirement.
3. complex electric energy comprehensive quality control system according to claim 1 or 2, it is characterised in that: described is long-range logical Communication interface includes serial communication interface and Internet of Things network communication module, the serial network communication interface include RS232, RS485 and/or USB, the Internet of Things network communication module include power carrier communication module, GPRS communication module, ether Network Communication module and WIFI module.
4. complex electric energy comprehensive quality control system according to claim 1 or 2, it is characterised in that: the idle benefit Repaying device further includes optical communication interface, between the primary circuit and the control module control information with adopt Collect the bridge joint of signal.
5. complex electric energy comprehensive quality control system according to claim 3, it is characterised in that: the reactive compensation dress Setting further includes optical communication interface, for the control information and acquisition letter between the primary circuit and the control module Number bridge joint.
6. complex electric energy comprehensive quality control system according to claim 1 or 2, it is characterised in that: the control mould Block further includes failure and protection location, the switch shape in the data acquisition and procession module acquisition active inverter Protective switch status signal in state signal, temperature rise value, DC capacitor voltage value and the pre-charge module, and according to electrical Principle and operating temperature allowable range are interlocked, is respectively combined by the failure and protection location described in outputing control signals to Breaker, the pre-charge module and the active inverter.
CN201810917080.5A 2018-08-13 2018-08-13 A kind of complex electric energy comprehensive quality control system Pending CN109038608A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111371107A (en) * 2020-04-15 2020-07-03 江苏大航泓城电力电子有限公司 Comprehensive distribution transformer three-phase unbalance compensation system and method
CN115001137A (en) * 2022-06-06 2022-09-02 科姆勒电气(安徽)有限公司 Total-effect electric energy optimization device centralized control detection management system
CN118444015A (en) * 2024-04-30 2024-08-06 怀化建南机器厂有限公司 Three-phase intelligent ammeter based on thing networking

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CN204304441U (en) * 2014-12-02 2015-04-29 深圳市贝壳电气技术有限公司 A kind of reactive power dynamic compensation system
US20160261112A1 (en) * 2015-03-04 2016-09-08 Airbus Operations Gmbh Phase balancing in three-phase system
CN206850445U (en) * 2017-05-10 2018-01-05 广西云涌科技有限公司 A kind of low-voltage platform area power quality harnessed synthetically power distribution equipment
CN108321815A (en) * 2018-03-08 2018-07-24 西安爱科赛博电气股份有限公司 A kind of low-voltage network utility power quality control system and method
CN208623392U (en) * 2018-08-13 2019-03-19 浙江百固电气科技股份有限公司 A kind of complex electric energy comprehensive quality control device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204304441U (en) * 2014-12-02 2015-04-29 深圳市贝壳电气技术有限公司 A kind of reactive power dynamic compensation system
US20160261112A1 (en) * 2015-03-04 2016-09-08 Airbus Operations Gmbh Phase balancing in three-phase system
CN206850445U (en) * 2017-05-10 2018-01-05 广西云涌科技有限公司 A kind of low-voltage platform area power quality harnessed synthetically power distribution equipment
CN108321815A (en) * 2018-03-08 2018-07-24 西安爱科赛博电气股份有限公司 A kind of low-voltage network utility power quality control system and method
CN208623392U (en) * 2018-08-13 2019-03-19 浙江百固电气科技股份有限公司 A kind of complex electric energy comprehensive quality control device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111371107A (en) * 2020-04-15 2020-07-03 江苏大航泓城电力电子有限公司 Comprehensive distribution transformer three-phase unbalance compensation system and method
CN115001137A (en) * 2022-06-06 2022-09-02 科姆勒电气(安徽)有限公司 Total-effect electric energy optimization device centralized control detection management system
CN115001137B (en) * 2022-06-06 2023-02-03 科姆勒电气(安徽)有限公司 Total-effect electric energy optimization device centralized control detection management system
CN118444015A (en) * 2024-04-30 2024-08-06 怀化建南机器厂有限公司 Three-phase intelligent ammeter based on thing networking

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Application publication date: 20181218