CN101917010A - Compound control structure for balanced output of multiple sets of automatically controlled power equipment - Google Patents
Compound control structure for balanced output of multiple sets of automatically controlled power equipment Download PDFInfo
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- CN101917010A CN101917010A CN 201010236889 CN201010236889A CN101917010A CN 101917010 A CN101917010 A CN 101917010A CN 201010236889 CN201010236889 CN 201010236889 CN 201010236889 A CN201010236889 A CN 201010236889A CN 101917010 A CN101917010 A CN 101917010A
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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 invention relates to a compound control structure for the balanced output of multiple sets of automatically controlled power equipment, which is characterized in that a control structure of combining the traditional close-loop negative feedback and feedforward input is adopted, and the amplification coefficient of a feedback channel of a close-loop negative feedback per se of one set of equipment is reduced to be K times the original value, and K is larger than 0 and smaller than 1; the feedback quantity of another set of equipment is introduced, i.e. a feedforward element is added, the amplification coefficient of the feedforward element is 1-K times the original value, and K is larger than 0 and smaller than 1; and the control structure needs to meet the condition that the multiple sets of automatically controlled power equipment have the same automatic control structures. The invention has the advantages that the feedforward element is added to counteract the influence of interference signals by modifying the control system structure, so that the deviation change directions, obtained by adding and subtracting elements, of the feedforward values, the feedback values and the reference values of the two sets of equipment are the same, and the vibration of outputs between the two sets of equipment, which is caused by that control circuits of the two sets of equipment receive input quantities with different phases, is avoided.
Description
Technical field
The present invention relates to a kind of control structure that many cover power equipments are realized balance output that is used for.
Background technology
Along with economic development and technological progress, the high-power electric equipment of a large amount of automation control is widely used in telecommunications, the energy, communications and transportation, military equipment, material engineering, electric power system and electric drive field, be used to drive electric drive mechanism, as variable frequency power supply, regulate line voltage trend etc.Along with popularizing of the power equipment of automation control, in some occasion in order to satisfy big capacity or operational flexibility, arranged the equipment of the same race of two covers or the automatic control more than two covers in same mounting points, this has just produced the realistic problem that how balance is exported between many complete equipments, particularly how all to keep balance output also to keep the independent operating separately of the control system of each complete equipment simultaneously under electrical power system transient and stable state.
Has the independently power equipment of automatic control system for many covers of installing in same place, even the operation characteristic working curve is identical, because the error of transducer, controller, power component etc., their output also can produce deviation, if not having special additional means is revised, they just can not remain on the identical working point of characteristic working curve, and promptly output can not balance, and may produce the phase mutual interference vibration occurs between many complete equipments.
Many variablees all can influence the measurement of controller, but wherein some variable is controlled, and one of them variable must be controlled by controller, and remaining variables is defined as the disturbance variable of control loop.Disturbance is to exist forever, because these disturbances will make Control Parameter depart from set point, controller also must be made a response to this.In traditional pid feedback control loop, up to these disturbances the influence that controlled variable causes is shown in measuring-signal, controller just begins action, and controller does not recognize that at all these disturbances also just can't make corresponding adjusting to it before this.Controller can only attempt making correct compensation according to the deviation that calculates in the controller like this, and the oscillating reactions of feedback loop is exactly the obvious performance of this solution process.
At present, the solution that balance output problems between the power equipment that installation many covers in same place are controlled automatically see report normally adopts same control system, produce the instruction of the output distribution of each complete equipment output unit by a controller, this still can only calculate in fact from the strict sense and do is a set of equipment, rather than possesses many complete equipments of self autonomous control system separately; Its range of application be have circumscribed.
Summary of the invention
The purpose of this invention is to provide a kind of many covers compound control structure of the power equipment balance output of control automatically, by revising the control system structure, increase the feedforward link and offset the influence that interference signal is brought, the deviation change direction that obtains after making two complete equipment feedforwards, feedback, reference value through the plus-minus link is identical, has avoided causing the vibration of exporting between two complete equipments because the control loop of two complete equipments receives the input variable of out of phase.
For achieving the above object, the present invention is achieved through the following technical solutions:
Many covers are the compound control structure of the power equipment balance output of control automatically, it is characterized in that, the control structure that adopts traditional close loop negative feedback to combine with feedforward input is reduced to original K doubly, 0＜K＜1 with the feedback path amplification coefficient of the close loop negative feedback self of a set of equipment; Introduce the feedback quantity of another set of equipment, promptly increase the feedforward link, feedforward link amplification coefficient is 1-K times, 0＜K＜1; The condition that this control structure need satisfy is that the power equipment that many covers are controlled automatically has identical automatic control structure.
For simple control structure, get K=0.5, make the close loop negative feedback and the amplification coefficient of feedforward input be 0.5 times, close loop negative feedback can a shared amplifying element with the feedforward input.
Compared with prior art, novelty of the present invention and creativeness are embodied in: the output by introducing other equipment can realize the output of many cover output level equal power through the automatic control system of feedforward link access arrangement.
Description of drawings
Fig. 1 is the degenerative control block diagram of using always of traditional closed-loop;
Fig. 2 is the control block diagram of increase introducing after the feedforward link of non-self signal;
Fig. 3 is that feedforward is controlled block diagram with the simplification after feedback element adopts identical amplification coefficient;
Fig. 4 is the output curve diagram after two cover SVC adopt compound control structure.Curve is respectively from top to bottom: line voltage, the first cover SVC output current, the second cover SVC output current.
Embodiment
Many covers are the compound control structure of the power equipment balance output of control automatically, and this control structure is revised as the compound control structure that feedback combines with feedforward by increase a feedforward input element in traditional close loop negative feedback structure with traditional negative feedback structure.
See Fig. 1, the structure of former control system constitutes the close loop negative feedback control structure in proper order by PID controlling unit, output controlling unit, electric power system, measurement links, amplifying element, summation link.
See Fig. 2, the present invention has increased the feedforward input element of another set of equipment in this complete equipment in traditional close loop negative feedback control structure shown in Figure 1, control structure promptly of the present invention is: feedforward input amplifying element, summation link by PID controlling unit, output controlling unit, electric power system, measurement links, the amplifying element of this complete equipment, another set of equipment constitute the close loop negative feedback control structure in proper order.
Suppose and consider the two covers power equipment of control automatically, the situation of more covers can the rest may be inferred.Control system for a set of equipment, on former close loop negative feedback control structure, self the amplification coefficient of feedback path reduced to original k doubly (0＜k＜1), the feedback quantity of introducing another set of equipment again increases the feedforward link, and feedforward link amplification coefficient is made as 1-k doubly.
The controlled condition that this method need satisfy is:
1) each complete equipment need be arranged to identical automatic control structure;
2) introducing the amplification coefficient of the feedforward link of non-self signal will be according to the capacity pro rate of each complete equipment.
The feedforward link that increases has been offset the influence that interference signal is brought, the deviation change direction that obtains after making two complete equipment feedforwards, feedback, reference value through the plus-minus link is identical, has avoided causing the vibration of exporting between two complete equipments because the control loop of two complete equipments receives the input variable of out of phase.
Embodiment 2
Many covers are the compound control structure of the power equipment balance output of control automatically, this control structure is revised as the compound control structure that feedback combines with feedforward by increase a feedforward input element in traditional close loop negative feedback structure (see figure 1) with traditional negative feedback structure.
See Fig. 3, simple in structure in order to make control system, can get K=0.5, make the close loop negative feedback and the amplification coefficient of feedforward input be 0.5 times, the another set of feedforward amount of feedback quantity and introducing can shared amplifying element like this.The feedforward link that increases has been offset the influence that interference signal is brought, the deviation change direction that obtains after making two complete equipment feedforwards, feedback, reference value through the plus-minus link is identical, has avoided causing the vibration of exporting between two complete equipments because the control loop of two complete equipments receives the input variable of out of phase.
The controlled condition that this method need satisfy is:
1) each complete equipment need be arranged to identical automatic control structure;
2) amplification coefficient of introducing the feedforward link of non-self signal will can carry out five equilibrium for the feedforward link amplification coefficient that can increase newly between the identical equipment of each cover capacity and handle according to the capacity pro rate of each complete equipment.
Example 1: the wide extra-high voltage direct-current transmission of south electric network cloud Chuxiong current conversion station two cover SVC, single cover capacity 120Mvar, when adopting traditional closed-loop negative feedback control, find through test of many times, after two cover SVC successively start, load or burden without work is born by a cover SVC and is transferred in the re-allocation process of being born by two cover SVC, the oscillatory process back and forth that reactive power is redistributed between two cover SVC might occur.
Control structure is revised in the back, introduce non-self output signal feedforward link, in order to make control structure simple, the electric current of another set of SVC is introduced, with the together passage input of self feedback current in original control structure behind self the electric current sum-average arithmetic, the shared same input channel of the link that promptly feedovers and current feedback link.The electric current of two cover SVC is averaged the input variable of back as the feedforward link, control as main closed loop with the voltage stationary mode, the reactive voltage of control loop output then tends towards stability relatively.According to the size of load reactive power (reactive current), control voltage and the output current of SVC indirectly.Because the feedforward link input variable of two cover SVC is identical, and the voltage close loop master control input variable of this two cover SVC all is a 500kV side voltage sample value.The feedforward link has been offset the influence that interference signal is brought, and makes that the input variable change direction of two cover SVC feedforward links is identical, has avoided causing the back and forth vibration of reactive power between two cover SVC because two cover control loops receive the input variable of out of phase.
See Fig. 4, the SVC output when having write down electrical network 500kV ac bus and the single phase ground fault of 100ms resistance to earth 100 Ω occurring continuing, the voltage control input dead band 200V of SVC.Among the figure, the top curve is an electrical network 500kV ac bus voltage, and two curves in below are respectively the output reactive current of two cover SVC.As seen from Figure 4, two cover SVC have realized idle output balance in suffering the voltage fluctuation adjustment process of moment, the reactive power vibration between the two cover SVC do not occur; Then, in being tending towards finally stabilised process, two cover SVC have also realized idle output balance.
Claims (2)
1. many covers are the compound control structure of the power equipment balance output of control automatically, it is characterized in that, the control structure that adopts traditional close loop negative feedback to combine with feedforward input is reduced to original K doubly, 0＜K＜1 with the feedback path amplification coefficient of the close loop negative feedback self of a set of equipment; The output of introducing another set of equipment promptly increases the feedforward link as feedback quantity, and feedforward link amplification coefficient is 1-K times, 0＜K＜1; The condition that this control structure need satisfy is that the power equipment that many covers are controlled automatically has identical automatic control structure.
2. many covers according to claim 1 are the compound control structure of the power equipment balance output of control automatically, it is characterized in that, for simple control structure, get K=0.5, make the close loop negative feedback and the amplification coefficient of feedforward input element be 0.5 times, thereby close loop negative feedback can a shared amplifying element with the feedforward input.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010236889 CN101917010A (en) | 2010-07-27 | 2010-07-27 | Compound control structure for balanced output of multiple sets of automatically controlled power equipment |
| PCT/CN2011/077349 WO2012013125A1 (en) | 2010-07-27 | 2011-07-26 | Complex control structure for balancing output of multiple sets of electrical equipment under automatic controls |
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| CN 201010236889 CN101917010A (en) | 2010-07-27 | 2010-07-27 | Compound control structure for balanced output of multiple sets of automatically controlled power equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012013125A1 (en) * | 2010-07-27 | 2012-02-02 | 荣信电力电子股份有限公司 | Complex control structure for balancing output of multiple sets of electrical equipment under automatic controls |
| CN104993497A (en) * | 2015-07-17 | 2015-10-21 | 国家电网公司 | Coordination and cooperation control system for SVCs and parallel reactive branches |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242528C (en) * | 2003-01-30 | 2006-02-15 | 清华大学 | Sine wave inverter capable of parallel operation |
| US20080239770A1 (en) * | 2005-09-03 | 2008-10-02 | Alfred Punzet | Active Network Filter |
| CN101662156A (en) * | 2009-09-18 | 2010-03-03 | 山东电力集团公司潍坊供电公司 | Storage battery grid-connected current control method based on compound control strategy |
| CN101667012A (en) * | 2008-09-03 | 2010-03-10 | 长春工程学院 | Method for controlling reinforcement learning adaptive proportion integration differentiation-based distribution static synchronous compensator |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4291731B2 (en) * | 2004-04-27 | 2009-07-08 | トヨタ自動車株式会社 | Rotating electric machine drive device and vehicle equipped with the same |
| US7768805B2 (en) * | 2007-03-09 | 2010-08-03 | General Electric Company | Clean input UPS with fast rectifier control and improved battery life |
| CN201773291U (en) * | 2010-07-27 | 2011-03-23 | 荣信电力电子股份有限公司 | Compound control structure for balanced output of multiple sets of automatic-control power equipment |
| CN101917010A (en) * | 2010-07-27 | 2010-12-15 | 荣信电力电子股份有限公司 | Compound control structure for balanced output of multiple sets of automatically controlled power equipment |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242528C (en) * | 2003-01-30 | 2006-02-15 | 清华大学 | Sine wave inverter capable of parallel operation |
| US20080239770A1 (en) * | 2005-09-03 | 2008-10-02 | Alfred Punzet | Active Network Filter |
| CN101667012A (en) * | 2008-09-03 | 2010-03-10 | 长春工程学院 | Method for controlling reinforcement learning adaptive proportion integration differentiation-based distribution static synchronous compensator |
| CN101662156A (en) * | 2009-09-18 | 2010-03-03 | 山东电力集团公司潍坊供电公司 | Storage battery grid-connected current control method based on compound control strategy |
Non-Patent Citations (2)
| Title |
|---|
| 《冶金自动化》 20071231 汪娟娟等 一种新型静止无功补偿装置控制***及其应用 48-51 1-2 , 第3期 * |
| 《电力电子技术》 20070731 傅闯等 一种基于WIN_TDC的SVC控制*** 33-35 1-2 第41卷, 第7期 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012013125A1 (en) * | 2010-07-27 | 2012-02-02 | 荣信电力电子股份有限公司 | Complex control structure for balancing output of multiple sets of electrical equipment under automatic controls |
| CN104993497A (en) * | 2015-07-17 | 2015-10-21 | 国家电网公司 | Coordination and cooperation control system for SVCs and parallel reactive branches |
| CN104993497B (en) * | 2015-07-17 | 2018-03-30 | 国家电网公司 | SVC and parallel reactive branch road a kind of cooperation control system |
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| WO2012013125A1 (en) | 2012-02-02 |
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Application publication date: 20101215 |