CN1665095A - A comprehensive electric energy quality regulator - Google Patents
A comprehensive electric energy quality regulator Download PDFInfo
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- CN1665095A CN1665095A CN2005100184307A CN200510018430A CN1665095A CN 1665095 A CN1665095 A CN 1665095A CN 2005100184307 A CN2005100184307 A CN 2005100184307A CN 200510018430 A CN200510018430 A CN 200510018430A CN 1665095 A CN1665095 A CN 1665095A
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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
- Y02E40/30—Reactive power compensation
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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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses a synthetic electric-energy quality regulator, comprising series and parallel active filter units, measuring unit and control units, where the parallel active filter unit is connected in series with parallel passive filter unit to compose a parallel unit, which is connected to the system; the series active filter unit is under the control of the series control unit and outputs sinusoidal current by the driving of all the switches of the first inverter unit; the parallel active filter unit is controlled by the parallel control unit and outputs an specific voltage by the driving of all the switches of the second inverter unit; the parallel passive filter unit is a LC filter circuit to provide a low resistance pass for harmonic current of a load and compensate reactive power of the load. The invention overcomes the shortages of large capacity and high manufacturing cost of the original parallel active filter; and has a better tracking effect and a better compensating effect, as well as higher performance/cost trade-off.
Description
Technical field
The invention belongs to power system automatic field, be specifically related to a kind of high performance comprehensive electric energy quality regulator.
Background technology
The development of power electronic technology in recent years makes that rectifier in the power distribution network, RHVC, arc furnace, electric railway etc. are non-linear, imbalance and impact load constantly increase.These loads have also brought quality of power supply pollution problem to electrical network, as harmonic wave, low power factor, imbalance and voltage fluctuation and flickering etc. when enhancing productivity greatly.Comprehensive electric energy quality regulator (UnifiedPower Quality Conditioner, UPQC, also claim unified electric energy quality controller) can carry out comprehensive compensation to these power quality problems, it is particularly useful for those both can produce quality of power supply pollution to system, again supply power voltage was changed very responsive load.Conclusion is got up, and current comprehensive electric energy quality regulator in using and studying has following characteristics:
On structure, comprehensive electric energy quality regulator by series active power filter (Series ActivePower Filter, SAPF) and parallel active filter (Parallel Active Power Filter PAPF) constitutes.From control strategy, series active power filter generally is controlled as voltage source, its output voltage and system harmonics current i
ShAnd/or system harmonics voltage v
ShBe directly proportional, and generally also require it the load side voltage magnitude can be stabilized near the rated value; Parallel active filter then generally is controlled as current source, is used to absorb the harmonic wave i of load
LhAnd/or reactive current i
Lq, and keep the active power balance of whole device.
This type of Technical Reference document has: Akigi H.New Trends in Active Filters for PowerConditioning[J] .IEEE Trans.on Industrial Application, 1996,2 (6): 1312-1322.
The current comprehensive electric energy quality regulator of using and studying generally comprises series active power filter unit 1, parallel active filter unit 2, measuring unit 3 and control assembly 4 as shown in Figure 1.Wherein: L
F1, L
F2And C
F1, C
F2Be respectively filter inductance and electric capacity; Dc capacitor C
dBe used for providing direct voltage V to first inverter unit 1.1 and second inverter unit 2.1
DcThe switching tube of forming first and second inverter units is for turn-offing a kind of in the electronic power switch device (insulated gate bipolar thyristor IGBT, gate level turn-off thyristor GTO etc.); First inverter unit 1.1 passes through first transformer unit 1.2 to the injecting voltage v of system
IS, v
ISGeneral and i
Sh(i
ShBe system power i
SHarmonic component) and/or v
Sh(v
ShBe system voltage v
SHarmonic component) be directly proportional, the comprehensive electric energy quality regulator that has also requires v
ISCan be with load voltage v
LFundamental voltage amplitude maintain near the rated value; Second inverter unit 2.1 passes through second transformer unit 2.2 to the injection current i of system
C, current i
CGenerally be used to compensate load current i
LHarmonic component and keep dc voltage V
DcStable, some comprehensive electric energy quality regulator also requires i
CCan compensate load current i
LIdle component and asymmetrical component; Measuring unit 3 adopts instrument transformer or Hall element to gather voltage and current signal (as v
S, i
SDeng); The signal that control assembly 4 is gathered according to measuring unit 3 is controlled, and various control method is arranged in the prior art, but generally series active power filter is controlled to be voltage source, parallel active filter is controlled to be current source.
There is following problem in above-mentioned comprehensive electric energy quality regulator: 1. parallel active filter bears voltage big (suitable with whole load voltage), thereby desired volume is bigger, problem such as the difficulty that possesses skills when Project Realization is big, cost is high and equipment operating efficiency is low.2. series active power filter is controlled as a controlled voltage source, and its output reference voltage comprises certain harmonic wave usually, thus make to detect and control system complexity, output tracking effect bad.
Summary of the invention
The objective of the invention is to overcome above-mentioned existing defective, a kind of high performance comprehensive electric energy quality regulator is provided.This electric energy regulator can reduce the capacity of the active filter of its part in parallel, and improves its control effect, promotes its cost performance.
A kind of comprehensive electric energy quality regulator provided by the invention, comprise series active power filter unit, parallel active filter unit, measuring unit and control unit, the shared direct current energy-storage capacitor of first inverter unit in the series active power filter unit and second inverter unit in the parallel active filter unit, the series active power filter unit is by first transformer unit series connection connecting system, measuring unit is used to gather voltage, the current signal from electrical network, series active power filter unit and parallel active filter unit, it is characterized in that:
Parallel active filter unit and passive filter units in series in parallel constitute unit in parallel, connecting system in parallel;
Control unit is made of Parallel Control unit and series connection control unit, it is according to voltage, current signal output driving pulse from the measuring unit input, wherein, the Parallel Control unit is used to control the voltage of parallel active filter unit output appointment, and the series connection control unit is used to control series active power filter unit output sinusoidal current;
The series active power filter unit by the driving to first each switching tube of inverter unit, makes output sinusoidal current in series active power filter unit by the control of series connection control unit;
The parallel active filter unit by the driving to second each switching tube of inverter unit, makes output given voltage in parallel active filter unit by the Parallel Control unit controls;
Passive filter in parallel unit is the LC filter circuit, is used for providing the reactive power of low impedance path and compensation load to the load harmonic current.
The structure of above-mentioned Parallel Control unit is: idle computing unit is according to the load voltage and the electric current v of input
L, i
LSignal, calculated load fundamental wave reactive power power Q
L, and this signal passed to the reactive power compensation computing unit; The first-harmonic resolving cell is according to input load voltage v
LAnd current i
LSignal calculates and obtains load voltage first-harmonic effective value V
Lf, the sinusoidal wave v of homophase unit
Lf1 *With the sinusoidal wave v of poor unit mutually
Lf2 *, v wherein
Lf1 *For with v
LSynchronous unit sine wave, v
Lf2 *For being ahead of v
LThe unit sine wave of ° electrical degree; The reactive power compensation computing unit is according to input signal Q
L, V
LfAnd X
C, X wherein
CEquivalent fundamental reactance, V for passive filter in parallel unit
LfBe the first-harmonic effective value of load voltage, adopt following formula to calculate the voltage magnitude V that is used for idle adjusting that the parallel active filter unit need be exported
IPq *:
First pi element is according to input signal Δ V
Dc, Δ V
Dc=V
Dc *-V
Dc, V wherein
Dc *Be direct voltage desired value, V
DcBe the direct voltage actual value, calculate and obtain the voltage magnitude V that is used for stable DC side voltage that the parallel active filter unit need be exported
IPp *The harmonic wave resolving cell is according to input signal v
L, calculate and obtain load voltage harmonic component v
Lh, and this signal passed to second pi element; Second pi element is according to input signal v
Lh, calculate and obtain the harmonic voltage v that the parallel active filter unit need be exported
IPh *Parallel pulse width modulated control unit is according to input signal v
IP *,
Calculate the start pulse signal that obtains switching tube in second inverter unit, and flow to driver element in parallel; Driver element in parallel is isolated amplification according to the start pulse signal of input to start pulse signal, and output is to the driving pulse of switching tube in second inverter unit, driving switch pipe.
The structure of above-mentioned series connection control unit is: synchronization signal unit is according to input signal v
SOr i
S, the sinusoidal wave i of reference units of the electric current that calculating acquisition series active power filter unit need be exported
ISu *The 3rd pi element is according to input signal Δ V
Lf,
V wherein
LfBe load voltage first-harmonic effective value, V
Lf *For load fundamental voltage target effective value, calculate and obtain the fundamental current amplitude I that the series active power filter unit need be exported
IS *The hysteresis current unit is according to input signal i
IS *And i
IS, wherein,
Calculate the start pulse signal that obtains each switching tube in first inverter unit, flow to the tandem drive unit; The tandem drive unit isolates amplification according to the start pulse signal of input to trigger impulse, and output is to the driving pulse of switching tube in first inverter unit, driving switch pipe.
The comprehensive electric energy quality regulator that the present invention proposes structurally, the passive filter in parallel unit of having connected on the parallel active filter unit constitutes unit in parallel, connecting system in parallel then; On control strategy, the series active power filter unit is controlled as the first-harmonic sinusoidal current source, the parallel active filter unit is controlled as voltage source.Comprehensive electric energy quality regulator and existing electric energy regulator that the present invention proposes are all inequality on structure and working method, and it can solve the existing problem of existing electric energy regulator well.Particularly, the present invention has following technique effect:
1, parallel active filter unit desired volume is little.The unit in parallel of comprehensive electric energy quality regulator provided by the invention is made of passive filter in parallel unit and parallel active filter units in series, most fundamental voltage is born by passive filter in parallel unit, compare with traditional comprehensive electric energy quality regulator, the voltage that parallel active filter of the present invention unit bears reduces a lot, thereby reduced desired volume greatly, overcome the shortcoming that the parallel active filter capacity is big in traditional comprehensive electric energy quality regulator, cost is high.
2, be the first-harmonic sinusoidal current source with the series active power filter unit controls, be controlled to be harmonic voltage source and compare with the existing comprehensive electric energy quality regulator part of will connecting, its detect and control system simply, the output tracking effect is better.
3, comprehensive electric energy quality regulator provided by the invention has all functions of traditional comprehensive electric energy quality regulator, has better compensation effect, higher cost performance simultaneously, and is easier to hardware and realizes.
Description of drawings
Fig. 1 is the structural representation of existing electric energy regulator;
Fig. 2 is the structural representation of electric energy regulator provided by the invention;
Fig. 3 is the control block diagram of a kind of embodiment of Parallel Control unit among Fig. 2;
Fig. 4 is the control block diagram of a kind of embodiment of series connection control unit among Fig. 2;
Fig. 5 is a simulation study system diagram of the present invention;
The system emulation waveform of Fig. 6 when not carrying out any compensation;
Fig. 7 is the system emulation waveform of the present invention after dropping into.
Embodiment
The comprehensive electric energy quality regulator that the present invention proposes shown in Fig. 2,3,4, comprising: series active power filter unit 1, unit in parallel 5, measuring unit 3, control unit 7.
Series active power filter unit 1 is by first transformer unit, 1.2 series connection connecting systems, control output sinusoidal current by control unit 7, thereby force system power to become sine, play and suppress system power harmonic wave and the dynamically effect of recovery of load voltage, can also play the effect of corrective system power factor by suitable control (as described later); Unit 5 in parallel is made of parallel active filter unit 2 and 6 series connection of passive filter in parallel unit, connecting system in parallel then, and the control output given voltage by control unit 7 plays stable DC side voltage V
DcEffect, can also play the effect of load power factor adjustment, load voltage waveform optimization by suitable control (as described later); Measuring unit 3 is gathered voltage and current signal, and passes to control unit 7; Control unit 7 is according to the voltage and current signal that obtains, and according to as described later control method output driving pulse, and the switching tube of first and second inverter units is driven.Below each unit is specifically described.
Series active power filter unit 1 comprises first inverter unit 1.1, first transformer unit 1.2 and filter inductance electric capacity L
F1, C
F1The structure of each subelement and device and method of attachment are identical with aforementioned series active power filter parts 1, but control method difference, in the present invention, series active power filter unit 1 is by the control of control unit 7, the output sinusoidal current, thus realize suppressing system harmonics electric current and the dynamic target of recovering of load voltage, and can also satisfy the target of corrective system power factor according to demand.
Unit 5 in parallel is made of parallel active filter unit 2 and 6 series connection of passive filter in parallel unit; Parallel active filter unit 2 comprises second inverter unit 2.1, second transformer unit 2.2 and filter inductance electric capacity L
F2, C
F2The structure of each unit and device is identical with aforementioned parallel active filter unit 2 with method of attachment, but control method difference, in the present invention, parallel active filter unit 2 is by the control of control unit 7, the voltage of output appointment, and output voltage must consider the requirement that DC bus-bar voltage is stable, it is less important to satisfy in the adjustment of load bus dynamic power factor, these two targets of load voltage waveform optimization one or two demand; Passive filter in parallel unit 6 is conventional LC filter circuits, can be made of a LC branch road, also can be composed in parallel by two or more LC branch roads, and its effect is the reactive power that low impedance path and compensation load are provided to the load harmonic current.
Same as the prior art, the shared direct current energy-storage capacitor C of first inverter unit and second inverter unit
d, make second inverter unit to direct current energy-storage capacitor C
dThe active power that provides series active power filter unit and parallel active filter unit to consume is is provided.
The implementation of measuring unit 3 is identical with measurement component of the prior art 3.
Control unit 7 comprises Parallel Control unit 8 and series connection control unit 9, is respectively applied for the output voltage to parallel active filter unit 2, the output current of series active power filter unit 1 is controlled, and is described in detail as follows.
Illustrate a kind of embodiment of Parallel Control unit 8 and series connection control unit 9 below.
As shown in Figure 3, Parallel Control unit 8 comprises eight subelements, and the function of each subelement and annexation are:
The input signal of idle computing unit 8.1 is load voltage and electric current v
L, i
L, adopt the computational methods (as classical Power Theory, Akagi instantaneous power theory etc.) of existing load fundamental wave reactive power, calculate load fundamental wave reactive power Q
L(when load is perception, Q
L＞0; Otherwise Q
L＜0), and with this signal passes to reactive power compensation computing unit 8.2;
The input signal of reactive power compensation computing unit 8.2 is Q
L, V
LfAnd X
C, X wherein
CEquivalent fundamental reactance, V for passive filter in parallel unit 6
LfFirst-harmonic effective value (, seeing for details hereinafter) for load voltage from first-harmonic resolving cell 8.3; This unit obtains the voltage magnitude V that is used for idle adjusting that parallel active filter unit 2 needs output by following formula
IPq *:
The input signal of first-harmonic resolving cell 8.3 is load voltage and electric current v
L, i
L, obtain load voltage first-harmonic effective value V according to existing method (as fast fourier transform and Phase Lock Technique etc.)
Lf, the sinusoidal wave v of homophase unit
Lf1 *With the sinusoidal wave v of poor unit mutually
Lf2 *, v wherein
Lf1 *For with v
LSynchronous unit sine wave, v
Lf2 *For being ahead of v
LThe unit sine wave of 90 ° of electrical degrees.
The input signal of first pi element 8.4 is Δ V
Dc=V
Dc *-V
Dc, V wherein
Dc *Be dc voltage desired value, V
DcBe the dc voltage actual value; Obtain the voltage magnitude V that is used for stable DC side voltage that parallel active filter unit 2 needs output according to the proportional integral algorithm
IPp *
The input signal of harmonic wave resolving cell 8.5 is v
LObtain load voltage harmonic component v according to existing method (as fast fourier transform etc.)
Lh, and this signal passed to second pi element 8.6.The input signal of second pi element 8.6 is v
LhObtain the harmonic voltage v that parallel active filter unit 2 needs output according to the proportional integral algorithm
IPh *, it act as optimizes the load voltage waveform.
V
IPp *With v
Lf2 *Product be the voltage v that is used for stable DC side voltage that parallel active filter unit 2 needs output
IPp *, it act as dc voltage V
DcBe stabilized in desired value V
Dc *Near; V
IPq *With v
Lf1 *Product be the voltage v that is used for idle adjusting that parallel active filter unit 2 needs output
IPq *, it act as the correcting load power factor; v
IPp *, v
IPq *, v
IPh *And be the voltage v that parallel active filter unit 2 needs output
IP *(that is:
)。Above-mentioned multiplication and addition can use hardware circuit (as multiplier, adder) to realize, also can adopt software programming to realize.
The input signal of parallel pulse width modulated (PWM) control unit 8.7 is v
IP *Obtain the trigger impulse of each switching tube in second inverter unit 2.1 according to the PWM control method.
The input signal of driver element 8.8 in parallel is the trigger impulse of PWM control unit 8.7 outputs in parallel; Utilize existing drive circuit (as IGBT, the integrated drive plate of GTO etc.), trigger impulse is isolated amplify, output drives each switching tube the driving pulse of each switching tube in second inverter unit 2.1.
As shown in Figure 4, series connection control unit 9 comprises four subelements, and the function of each subelement and annexation are:
The input signal of synchronization signal unit 9.1 is v
SOr i
S(select v
SThe time series active power filter unit 1 can the corrective system power factor, select i
SThe time then can not), obtain the sinusoidal wave i of reference units that series active power filter unit 1 needs the electric current of output according to existing method (as phase-locked etc.)
ISu *, it act as and makes series active power filter unit 1 output current for sinusoidal.
The input signal of the 3rd pi element 9.2 is Δ V
Lf, and
V wherein
Lf *Be load fundamental voltage target effective value; Obtain the fundamental current amplitude I that series active power filter unit 1 needs output according to the proportional integral algorithm
IS *
I
IS *With i
ISu *Product be the first-harmonic sinusoidal current i that series active power filter unit (1) needs output
IS *, it act as and suppresses the system power harmonic wave and dynamically recover load voltage (with V
LfBe stabilized in desired value V
Lf *Near), and/or the corrective system power factor.
The input signal of hysteresis current unit 9.3 is i
IS *And i
IS(series active power filter unit 1 actual output current); Obtain the trigger impulse of each switching tube in first inverter unit 1.1 according to the method for hysteresis current control.
The input signal of tandem drive unit 9.4 is the trigger impulse of hysteresis current unit 9.3 outputs; Utilize existing drive circuit (as IGBT, the integrated drive plate of GTO etc.), trigger impulse is isolated amplify, output drives each switching tube the driving pulse of each switching tube in first inverter unit 1.1.
System is as shown in Figure 5 carried out simulation study, and system parameters is: supply voltage is a 220V standard sine voltage; System reactance Z
S=0.045+j0.6 Ω; Passive filter in parallel unit is the parallel connection of three times and five times filter branch, wherein three filter branch parameter L
3=10mH, C
3=110 μ F, five filter branch parameter L
5=3.38mH, C
5=120 μ F; Load is single-phase controlled rectifier strip resistance, inductance series load, Z
LD=2+j3 Ω.
Figure 6 shows that the simulation waveform when not carrying out any compensation.As seen from the figure, at this moment, since the nonlinear cause of load, load voltage v
LHave bigger distortion, its total harmonic distortion degree (THD) is 7.072%; Load voltage harmonic component v
LhAmplitude surpassed 60V, shown in second waveform among the figure, reached 20% of its fundamental voltage amplitude; The 3rd waveform among the figure is system power i
SWaveform, as seen from the figure, this moment, also there was bigger distortion in system power, and its total harmonic distortion degree is 13.431%.
Fig. 7 has provided the simulation waveform that the comprehensive electric energy quality regulator that adopts the present invention to propose compensates, and the 5 pairs of load power factors in unit in parallel this moment are proofreaied and correct, and the 1 pair of system power factor in series active power filter unit proofreaies and correct.Compare with Fig. 6, at this moment load voltage v
LWaveform very big improvement has been arranged, total harmonic distortion degree reduces to 1.283%.
Above-mentioned simulation result shows that the comprehensive electric energy quality regulator that the present invention proposes can be realized compensation load harmonic current effectively, suppresses the load voltage distortion, adjust functions such as load bus power factor and system power factor simultaneously.
Claims (3)
1, a kind of comprehensive electric energy quality regulator, comprise series active power filter unit, parallel active filter unit, measuring unit and control unit, the shared direct current energy-storage capacitor of first inverter unit in the series active power filter unit and second inverter unit in the parallel active filter unit, the series active power filter unit is by first transformer unit series connection connecting system, measuring unit is used to gather voltage, the current signal from electrical network, series active power filter unit and parallel active filter unit, it is characterized in that:
Parallel active filter unit (2) and passive filter in parallel unit (6) series connection constitute unit in parallel (5), connecting system in parallel;
Control unit (7) is made of Parallel Control unit (8) and series connection control unit (9), it is according to voltage, current signal output driving pulse from measuring unit (3) input, wherein, Parallel Control unit (8) is used to control the voltage of parallel active filter unit (2) output appointment, and series connection control unit (9) is used to control series active power filter unit (1) output sinusoidal current;
Series active power filter unit (1) by the driving to each switching tube of first inverter unit (1.1), makes output sinusoidal current in series active power filter unit (1) by series connection control unit (9) control;
Parallel active filter unit (2) by the driving to each switching tube of second inverter unit (2.1), makes output given voltage in parallel active filter unit (2) by Parallel Control unit (8) control;
Passive filter unit in parallel (6) is the LC filter circuit, is used for providing the reactive power of low impedance path and compensation load to the load harmonic current.
2, comprehensive electric energy quality regulator according to claim 1 is characterized in that: the structure of described Parallel Control unit (8) is:
Idle computing unit (8.1) is according to the load voltage and the electric current v of input
L, i
LSignal, calculated load fundamental wave reactive power power Q
L, and this signal passed to reactive power compensation computing unit (8.2);
First-harmonic resolving cell (8.3) is according to input load voltage v
LAnd current i
LSignal calculates and obtains load voltage first-harmonic effective value V
Lf, the sinusoidal wave v of homophase unit
Lf1 *With the sinusoidal wave v of poor unit mutually
Lf2 *, v wherein
Lf1 *For with v
LSynchronous unit sine wave, v
Lf2 *For being ahead of v
LThe unit sine wave of 90 ° of electrical degrees;
Reactive power compensation computing unit (8.2) is according to input signal Q
L, V
LfAnd X
C, X wherein
CEquivalent fundamental reactance, V for passive filter in parallel unit (6)
LfBe the first-harmonic effective value of load voltage, adopt following formula to calculate the voltage magnitude V that is used for idle adjusting that parallel active filter unit (2) needs output
IPq *:
First pi element (8.4) is according to input signal Δ V
Dc, Δ V
Dc=V
Dc *-V
Dc, V wherein
Dc *Be direct voltage desired value, V
DcBe the direct voltage actual value, calculate and obtain the voltage magnitude V that is used for stable DC side voltage that parallel active filter unit (2) needs output
IPPp *
Harmonic wave resolving cell (8.5) is according to input signal v
L, calculate and obtain load voltage harmonic component v
Lh, and this signal passed to second pi element (8.6);
Second pi element (8.6) is according to input signal v
Lh, calculate and obtain the harmonic voltage v that parallel active filter unit (2) needs output
IPh *
Parallel pulse width modulated control unit (8.7) is according to input signal v
IP *,
Calculate the start pulse signal that obtains switching tube in second inverter unit (2.1), and flow to driver element in parallel (8.8);
Driver element in parallel (8.8) is isolated amplification according to the start pulse signal of input to start pulse signal, and output is to the driving pulse of switching tube in second inverter unit (2.1), driving switch pipe.
3, comprehensive electric energy quality regulator according to claim 1 is characterized in that: the structure of described series connection control unit (9) is:
Synchronization signal unit (9.1) is according to input signal v
SOr i
S, calculate and obtain the sinusoidal wave i of reference units that series active power filter unit (1) needs the electric current of output
ISu *
The 3rd pi element (9.2) is according to input signal Δ V
Lf,
V wherein
LfBe load voltage first-harmonic effective value, V
Lf *For load fundamental voltage target effective value, calculate and obtain the fundamental current amplitude I that series active power filter unit (1) needs output
IS *
Hysteresis current unit (9.3) is according to input signal i
IS *And i
IS, wherein,
Calculate the start pulse signal that obtains each switching tube in first inverter unit (1.1), flow to tandem drive unit (9.4);
Tandem drive unit (9.4) isolates amplification according to the start pulse signal of input to trigger impulse, and output is to the driving pulse of switching tube in first inverter unit (1.1), driving switch pipe.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442626C (en) * | 2006-06-01 | 2008-12-10 | 西安交通大学 | Series active AC voltage quality regulator and controlling method |
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN102324745A (en) * | 2011-09-20 | 2012-01-18 | 山西合创电力科技有限公司 | Control method and device of hybrid type active power dynamic filter in intelligent power grid |
| CN101494382B (en) * | 2009-03-11 | 2012-05-09 | 张皓 | Large-capacity stillness wattless occurrence apparatus |
| CN104009476A (en) * | 2014-05-07 | 2014-08-27 | 燕山大学 | Electric energy quality regulator and control method |
| CN105244880A (en) * | 2015-10-19 | 2016-01-13 | 深圳供电局有限公司 | Method and system for suppressing direct-current voltage fluctuation of power quality regulator |
| CN108879711A (en) * | 2018-06-12 | 2018-11-23 | 广西大学 | A kind of single-phase reactive power continuous regulating mechanism of low pressure and method |
| CN111585284A (en) * | 2019-02-18 | 2020-08-25 | 中国电力科学研究院有限公司 | Grid-connected user voltage adjusting device and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442626C (en) * | 2006-06-01 | 2008-12-10 | 西安交通大学 | Series active AC voltage quality regulator and controlling method |
| CN101494382B (en) * | 2009-03-11 | 2012-05-09 | 张皓 | Large-capacity stillness wattless occurrence apparatus |
| CN101807799A (en) * | 2010-04-27 | 2010-08-18 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN101807799B (en) * | 2010-04-27 | 2012-05-02 | 天津大学 | Super capacitor energy storage type power quality compensator |
| CN102324745A (en) * | 2011-09-20 | 2012-01-18 | 山西合创电力科技有限公司 | Control method and device of hybrid type active power dynamic filter in intelligent power grid |
| CN102324745B (en) * | 2011-09-20 | 2013-12-04 | 山西合创电力科技有限公司 | Control device of hybrid type active power dynamic filter in intelligent power grid |
| CN104009476A (en) * | 2014-05-07 | 2014-08-27 | 燕山大学 | Electric energy quality regulator and control method |
| CN104009476B (en) * | 2014-05-07 | 2016-08-24 | 燕山大学 | Electric energy regulator and control method |
| CN105244880A (en) * | 2015-10-19 | 2016-01-13 | 深圳供电局有限公司 | Method and system for suppressing direct-current voltage fluctuation of power quality regulator |
| CN108879711A (en) * | 2018-06-12 | 2018-11-23 | 广西大学 | A kind of single-phase reactive power continuous regulating mechanism of low pressure and method |
| CN108879711B (en) * | 2018-06-12 | 2022-11-22 | 广西大学 | Low-voltage single-phase reactive power continuous adjusting device and method |
| CN111585284A (en) * | 2019-02-18 | 2020-08-25 | 中国电力科学研究院有限公司 | Grid-connected user voltage adjusting device and control method |
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