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Research on Harmonic Detection of Low Voltage Shunt Active Power Filter

Huaqiang Zhang

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Abstract

The harmonic detection algorithm of low voltage shunt APF was researched.Converting the three-phase current coordinate by d-q transformation,picking out the fundamental active component,then the harmonic and reactive component was detected.The improved algorithm supplied the exact reference phase for current d-q transformation,then detection accuracy of the algorithm wasn't influenced by voltage distortion,so it can detect the harmonic and reactive component of load current effectively.

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What this paper is about

The harmonic detection algorithm of low voltage shunt APF was researched.Converting the three-phase current coordinate by d-q transformation,picking out the fundamental active component,then the harmonic and reactive component was detected.The improved algorithm supplied the exact reference phase for current d-q transformation,then detection accuracy of the algorithm wasn't influenced by voltage distortion,so it can detect the harmonic and reactive component of load current effectively.

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Available abstract

The harmonic detection algorithm of low voltage shunt APF was researched.Converting the three-phase current coordinate by d-q transformation,picking out the fundamental active component,then the harmonic and reactive component was detected.The improved algorithm supplied the exact reference phase for current d-q transformation,then detection accuracy of the algorithm wasn't influenced by voltage distortion,so it can detect the harmonic and reactive component of load current effectively.

Key concepts: Total harmonic distortion, Active power filter, Harmonic, AC power, Shunt (medical), Voltage, Control theory (sociology), Harmonic analysis

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