CN104253435A - Active power filter control method based on double dq transform - Google Patents
Active power filter control method based on double dq transform Download PDFInfo
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- CN104253435A CN104253435A CN201310263065.0A CN201310263065A CN104253435A CN 104253435 A CN104253435 A CN 104253435A CN 201310263065 A CN201310263065 A CN 201310263065A CN 104253435 A CN104253435 A CN 104253435A
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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 an active power filter control method based on double dq transform. The fundamental current calculation is performed by the double dq transform method. Since the detected power grid harmonic current ish rarely contains the power grid fundamental current, ksh*ish rarely contains ksh times of voltage source with the power grid fundamental current, the inverter fundamental current icf contains complete fundamental current and provides large resistance kcf for all passing fundamental current, and the fundamental resonant amplification between the inverter and a PPF1 is avoided. According to the method, the active portion capacity is reduced greatly on the premise of guaranteeing fine filtering effect, the method is adaptive to large-capacity complex-load harmonic harmonic current suppression, and the promotion prospect is promised.
Description
Technical field
The present invention relates to the control method of a kind of Active Power Filter-APF based on dual d-q transformation.
Background technology
From 70 years last century, active power filter (APF) obtained the extensive research [1 ~ 15] of people.Although pure active filter has the good feature of compensation effect, but power proportions shared by its inverter is large, and cost is high, and hold quantitative limitation owing to being subject to power electronic device, its capacity is difficult to the requirement meeting big capacity load, limits applying of active filter.Therefore, the capacity how reduced shared by Inverters in Active Power Filter has become one of Main way of active filter research in recent years.Parallel Hybrid Active Power Filter and Series Hybrid Active Power Filter be two kinds of typical cases and effectively topology.In these two kinds of topologys, inverter significantly reduces capacity because bearing fundamental voltage.But because including the very large first-harmonic composition of amplitude (the former is the fundamental current of passive filter group, and the latter is electrical network fundamental current) in inverter current, the capacity thus shared by inverter is still larger.Propose the topology that its inverter a kind of only need provide harmonic power, significantly reduce the capacity shared by inverter.But because load harmonic current is all flow through by inverter substantially, and usual load harmonic current comparatively large (load fundamental current 40% ~ 80% can be accounted for), so the capacity of its inverter is still larger.
Summary of the invention
The defect that the present invention seeks to exist for prior art provides a kind of Active Power Filter-APF based on the control method of dual d-q transformation.
The present invention for achieving the above object, adopts following technical scheme:
Active Power Filter-APF of the present invention is based on the control method of dual d-q transformation, it is characterized in that fundamental current calculates and all adopt the aforesaid method based on dual d-q transformation, due in the mains by harmonics current i sh that detects not containing electrical network fundamental current, be not ksh voltage source doubly with power network current first-harmonic composition in ksh × ish, and the fundamental current icf of inverter contains complete fundamental current, namely inverter all can present a very large impedance kcf to all fundamental currents flowing through himself, so the phenomenon of first-harmonic resonance amplification can not be there is between inverter and PPF1.
The present invention proposes a kind of new type of control method of the series hybrid active power filter with first-harmonic current bypass branch road, the program combines first-harmonic (harmonic wave) electric current detecting method based on dual d-q transformation, it can guarantee that this topology is under balance or uneven condition, inverter all only flows through mains by harmonics electric current, greatly reduces the capacity of active part.Control system adopts DSP pure digi-talization to realize, carry out the experimental study of 5kW load, result confirms to adopt above-mentioned control method, this topology can guarantee the capacity greatly reducing active part under the prerequisite that filter effect is good, be applicable to the harmonics restraint of Large Copacity complex load, promotion prospect is had an optimistic view of.
Accompanying drawing explanation
Fig. 1: structural representation of the present invention.
Embodiment
As shown in Figure 1, Active Power Filter-APF of the present invention is based on the control method of dual d-q transformation, it is characterized in that fundamental current calculates and all adopt the aforesaid method based on dual d-q transformation, due in the mains by harmonics current i sh that detects not containing electrical network fundamental current, be not ksh voltage source doubly with power network current first-harmonic composition in ksh × ish, and the fundamental current icf of inverter contains complete fundamental current, namely inverter all can present a very large impedance kcf to all fundamental currents flowing through himself, so the phenomenon of first-harmonic resonance amplification can not be there is between inverter and PPF1.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. an Active Power Filter-APF is based on the control method of dual d-q transformation, it is characterized in that fundamental current calculates and all adopt the aforesaid method based on dual d-q transformation, due in the mains by harmonics current i sh that detects not containing electrical network fundamental current, be not ksh voltage source doubly with power network current first-harmonic composition in ksh × ish, and the fundamental current icf of inverter contains complete fundamental current, namely inverter all can present a very large impedance kcf to all fundamental currents flowing through himself, so the phenomenon of first-harmonic resonance amplification can not be there is between inverter and PPF1.
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| CN201310263065.0A CN104253435A (en) | 2013-06-27 | 2013-06-27 | Active power filter control method based on double dq transform |
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| CN201310263065.0A CN104253435A (en) | 2013-06-27 | 2013-06-27 | Active power filter control method based on double dq transform |
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| CN104253435A true CN104253435A (en) | 2014-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350364A (en) * | 2020-09-28 | 2021-02-09 | 合肥工业大学 | Modeling method of full-power wind power generation system based on double synchronous rotating coordinate systems |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556572A (en) * | 2004-01-07 | 2004-12-22 | 浙江大学 | Control method of series mixed active power filter having base wave by-pass channel |
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- 2013-06-27 CN CN201310263065.0A patent/CN104253435A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1556572A (en) * | 2004-01-07 | 2004-12-22 | 浙江大学 | Control method of series mixed active power filter having base wave by-pass channel |
Non-Patent Citations (1)
| Title |
|---|
| 钟洪浩等: "串联混合有源电力滤波器基于双dq变换的新型控制方法", 《中国电机工程学报》, vol. 25, no. 1, 31 January 2005 (2005-01-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350364A (en) * | 2020-09-28 | 2021-02-09 | 合肥工业大学 | Modeling method of full-power wind power generation system based on double synchronous rotating coordinate systems |
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Application publication date: 20141231 |