Active Power Filter Selective Harmonic Compensation Control Method

A power filter and harmonic compensation technology, which is applied in the field of harmonic compensation, can solve the problems of complex algorithm and cannot specify harmonic compensation, and achieve the effect of simple implementation.
CN103427419BActive Publication Date: 2016-04-20้™ˆ้”กๅฟ 
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
้™ˆ้”กๅฟ 
Publication Date
2016-04-20

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Abstract

The invention discloses an active power filter selective harmonic compensation control method based on a frequency self-adaptive resonant controller. The active power filter selective harmonic compensation control method comprises the steps of acquiring power grid voltage, load current, active power filter output current and active power filter direct-current-side voltage; controlling output through an independent direct current control and independently controlling harmonic current through an independent control fundamental current according to a load signal; obtaining a modulation signal according to fundamental current control output and harmonic current control output and generating a switch signal of a controlling grid-connected inverter according to the modulation signal. The active power filter selective harmonic compensation control method can achieve selective harmonic compensation to load harmonic current and keep the compensation effect at rated frequency under the power grid frequency fluctuation condition.
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Description

technical field

[0001] The invention relates to a harmonic compensation method, in particular to a selective harmonic compensation control method for an active power filter. Background technique

[0002] With the rapid development of power electronics technology and the continuous emergence and maturity of various power electronic devices, flexible AC transmission, high-voltage DC transmission, microgrid and smart grid become possible. The wide application of power electronic devices will also aggravate the power quality problems of the power grid. Therefore, it is of great significance to develop high-performance active power filters to meet the needs of harmonic control. With selective harmonic compensation strategy APF has flexible compensation functions: 1) When the load harmonic current exceeds the compensation capacity of APF, you can choose to compensate only the characteristic harmonics that are more harmful; 2) When the passive filter and When the APF is used toge...

Claims

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