CN100544155C - Based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system - Google Patents
Based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system Download PDFInfo
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- CN100544155C CN100544155C CNB2007101926657A CN200710192665A CN100544155C CN 100544155 C CN100544155 C CN 100544155C CN B2007101926657 A CNB2007101926657 A CN B2007101926657A CN 200710192665 A CN200710192665 A CN 200710192665A CN 100544155 C CN100544155 C CN 100544155C
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/20—Active power filtering [APF]
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Abstract
The invention discloses a kind of harmonic wave and idle dynamic comprehensive compensation system based on APF and SVC, comprise independent resonance injection type Active Power Filter-APF APF, thyristor-controlled reactor TCR, mechanical switched capacitor MSC, described thyristor-controlled reactor TCR is installed in the electric network source side, machinery switched capacitor MSC is installed in load-side, and separate injection active power filter APF is installed between TCR and the MSC; A kind of frequency division phase-splitting current control method that is applicable to this comprehensive compensation system is disclosed simultaneously.System described in the present invention can realize that the dynamic real-time of mains by harmonics electric current and reactive power is followed the tracks of compensation to be administered, and is applicable to that the current control method of this system has overcome the traditional i of employing
p-i
qAPF and the big shortcoming of TCR degree of coupling during method have reduced TCR and the interactive degree of APF control performance greatly, thereby have improved the reliability and the control precision of system.
Description
Technical field
The present invention relates to a kind of harmonic wave and idle dynamic comprehensive compensation system and frequency division phase-splitting current control method based on APF and SVC.
Background technology
Electric energy is one of key factor that influences China's industrial development, and electric power energy-saving will occupy more and more important position in the process that China builds a conservation-minded society.In recent years, because problems such as plant capacity factors such as power distribution network harmonic wave and transformer are on the low side, caused enormous economic loss for power supply and electricity consumption enterprise, have benefited from the development of technology such as power electronics, power converter, making it possible to improve when dynamically administering harmonic wave the Active Power Filter-APF that power factor has high-power reactive power compensation concurrently becomes one of present research focus that improves the quality of power supply, energy-saving and cost-reducing aspect.
Adopt at present technology that the SVC device compensates the perception or the capacitive reactive power of electrical network comparative maturity, the existing examples of much using both at home and abroad at different electric pressure electrical networks.Traditional LC passive filter more and more can not satisfy the requirement of modern industry application and electric power system, along with the appearance of Active Power Filter-APF (APF), for power network harmonic wave management provides a kind of important mode.Active Power Filter-APF is offset the harmonic current that load produces by inject certain offset current to electrical network, its application has overcome some shortcomings of traditional harmonic suppressing method such as LC filter, but it is the high order harmonic component of compensating non-linear load generation both, can adapt to the quick variation of electric network impedance and frequency automatically again, and have high controllability and fast-response.But, be subject to the capacity requirement of switching device, be applicable to that the active filter of mesohigh side is rarer.
At present in the practical engineering application, SVC device and active filter use separately usually, the demand that satisfies the dynamic compensation reactive power respectively and dynamically administer harmonic wave, thereby can't satisfy the needs that dynamically to administer harmonic wave and compensating power simultaneously, SVC device and active filter joined together to use to satisfy this demand, but interactive Study on Problems seldom when at present The combined being got up to move.
Summary of the invention
Defective at the prior art existence, the present invention aims to provide a kind of harmonic wave and idle dynamic comprehensive compensation system based on APF and SVC, the improvement of carrying out dynamic real-time with each harmonic electric current in the realization centering high-voltage fence electric current and reactive power compensates, simultaneously in order to solve the big problem of degree of coupling in APF and the SVC running, the invention provides a kind of frequency division phase-splitting current control method that is used in this system, comprehensive compensation system when adopting described control method is being realized the real-time and dynamic compensating power, when administering in the electrical network harmonic current, guaranteed the stability of system.
To achieve the above object of the invention, the technical solution adopted in the present invention is: based on harmonic wave and the idle dynamic comprehensive compensation system of APF and SVC, comprise independent resonance injection type Active Power Filter-APF APF, thyristor-controlled reactor TCR, mechanical switched capacitor MSC, described thyristor-controlled reactor TCR is installed in the electric network source side, machinery switched capacitor MSC is installed in load-side, and separate injection active power filter APF is installed between TCR and the MSC.
The present invention also comprises a kind of based on the harmonic wave of HAPF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system, and its concrete steps comprise:
Select the sin-cos table of different frequency, by first order d-q conversion with input current signal i
sIn the harmonic signal of contained different frequency be converted into direct current;
With signal after the first order transforms respectively by low pass filter, with each the direct current signal i after obtaining transforming
d(n), n is a contained harmonic number in the power network current;
In new coordinate system, adopt conventional integrator that direct current signal is carried out PI control;
To be converted to required each harmonic signal i through the direct current signal after the control by second level d-q inverse transformation
Ref(n), and with it superpose to obtain final modulation signal i
Ref
The present invention can avoid electric network impedance and MSC to produce resonance whole device is impacted by thyristor-controlled reactor TCR is placed in the electric network source side.Machinery switched capacitor MSC is placed in the electrical network load-side, and separate injection active power filter APF is placed between TCR and the MSC, makes APF administer the harmonic wave that is produced by TCR in filtering mains by harmonics electric current.
In being applied to the above-mentioned harmonic wave and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system based on HAPF and SVC, adopt conventional i
p-i
qWhen method detects harmonic current, APF is equivalent to the band pass filter that centre frequency is 50Hz in rest frame, the bandwidth of this equivalent bandpass filter is exactly the low pass filter bandwidth in the current detecting, and SVC will control the fundamental wave reactive power of 50Hz, so the coupling between SVC and the APF is just relatively more serious.Adopt the present invention be applicable to this comprehensive compensation system based on detecting and control the each harmonic electric current respectively behind the electric current frequency division control method of d-q conversion, just to be equivalent to above-mentioned each harmonic be the multiband trapper at center to APF like this, the centre frequency of this multiband trapper is distant apart from 50Hz, thereby the dynamic characteristic to first-harmonic does not have any influence basically, thereby eliminated influencing each other between APF and the TCR, thereby improved the reliability and the control precision of system.
Therefore, above-mentioned harmonic wave and idle dynamic comprehensive compensation system and frequency division phase-splitting current control method thereof based on APF and SVC provided by the invention realized the dynamic tracking of capacitive in the electrical network or lagging reactive power and harmonic current is administered.
Description of drawings
Fig. 1 is a kind of based on the harmonic wave of APF and SVC and the structured flowchart of idle dynamic comprehensive compensation system among the embodiment;
Fig. 2 is the FB(flow block) of the frequency division phase-splitting current control method of the described system of realization Fig. 1.
Embodiment
As shown in Figure 1, harmonic wave and the idle dynamic comprehensive compensation system based on APF and SVC comprises separate injection active power filter APF, mechanical switched capacitor MSC, thyristor-controlled reactor TCR.Separate injection active power filter comprises Active Power Filter-APF and injection branch, and A phase injection branch is by capacitor C
1, capacitor C
2, inductance L
1Compose in series single tuned filter, capacitor C
1, inductance L
1Be composed in series A phase first-harmonic resonance circuit, Active Power Filter-APF is through output inductor L
0After the filtering, be connected in parallel, again through filter capacitor C by coupling transformer T and first-harmonic resonance circuit
2Insert electrical network, the two-phase injection circuit links identical with A in addition.Because the series resonance LC network resonance in the injection branch is tuned in fundamental frequency, its impedance of fundamental frequency is approximately 0, the short-channel that is equivalent to fundamental current, all will flow into this network so flow through the fundamental current of injection branch, and can not flow into coupling transformer and inverter, the effect of separate injection active filter mainly is dynamically to administer the mains by harmonics electric current.The effect of machinery switched capacitor MSC is a dynamic compensation electrical network lagging reactive power, and the effect of thyristor-controlled reactor (TCR) is a dynamic compensation electrical network capacitive reactive power.
Referring to Fig. 2, Fig. 2 is for to eliminate 5 times and 7 subharmonic are the electric current frequency division control method based on the d-q conversion that example is applicable to this system, and selecting frequency respectively is that the sin-cos of 250Hz and 350Hz frequency shows, by first order d-q conversion with input current signal i
sIn the harmonic signal of contained different frequency be converted into direct current signal, then with the signal after the first order transforms respectively by low pass filter, with each the direct current signal i after obtaining transforming
d(5) and i
d(7), after the conventional integrator of employing carries out PI control to direct current signal in new coordinate system, will be converted to required each harmonic signal i through the direct current signal after the control by second level d-q inverse transformation
Ref (5)And i
Ref (7), and with its stack to obtain final modulation signal i
RefIn the actual application, can carry out frequency division phase-splitting control to arbitrary specific times harmonic electric current, control system is expanded by conversion.
Claims (1)
1, a kind of based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system, described harmonic wave and idle dynamic comprehensive compensation system based on APF and SVC, comprise independent resonance injection type Active Power Filter-APF APF, thyristor-controlled reactor TCR and mechanical switched capacitor MSC, described thyristor-controlled reactor TCR is installed in the electric network source side, machinery switched capacitor MSC is installed in load-side, separate injection active power filter APF is installed between TCR and the MSC, it is characterized in that, said method comprising the steps of:
Select the sin-cos table of different frequency, by first order d-q conversion with input current signal i
sIn the harmonic signal of contained different frequency be converted into direct current signal;
Respectively by low pass filter, the AC signal after filtering is transformed by fundamental current and other times harmonic electric current is with each the direct current signal i after obtaining transforming with signal after the first order transforms
d(n), n is a contained harmonic number in the power network current;
To each direct current signal i
d(n) carry out PI control;
By second level d-q inverse transformation will be required each harmonic signal i through the conversion of signals after the control
Ref(n), and with it superpose to obtain final modulation signal i
Ref
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101926657A CN100544155C (en) | 2007-12-19 | 2007-12-19 | Based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101926657A CN100544155C (en) | 2007-12-19 | 2007-12-19 | Based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101202448A CN101202448A (en) | 2008-06-18 |
| CN100544155C true CN100544155C (en) | 2009-09-23 |
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| CNB2007101926657A Expired - Fee Related CN100544155C (en) | 2007-12-19 | 2007-12-19 | Based on the harmonic wave of APF and SVC and the frequency division phase-splitting current control method of idle dynamic comprehensive compensation system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950972B (en) * | 2010-10-22 | 2012-05-30 | 湖南大学 | SVC composite control method based on rapid equivalent susceptance calculation |
| CN103956738B (en) * | 2014-04-23 | 2015-12-02 | 国家电网公司 | A kind of battery energy storage system control method having APF and SVG function concurrently |
-
2007
- 2007-12-19 CN CNB2007101926657A patent/CN100544155C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| APF和SVC联合运行的稳定控制. 邓礼宽等.电力系统自动化，第29卷第18期. 2005 * |
| 无功补偿和混合滤波综合补偿系统及其应用. 唐杰等.中国电机工程学报，第27卷第1期. 2007 * |
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| CN101202448A (en) | 2008-06-18 |
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Granted publication date: 20090923 Termination date: 20201219 |