| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 92 === In this paper, It is not as same as traditional method to control real power or reactive power, we use the power balance idea to compensate harmonic and reactive current by Active Power Filter(APF). Current comes from using power electronic equipment results in harmonic current and reactive power. After using APF to supply these current, the source current must be sine wave after compensating, and is in phase with source voltage. From the point of view “the APF forces the source current to be sine wave and in phase with source voltage”, then APF can compensate reactive power and eliminate harmonic current. It is not necessary to calculate average power through complicate process, the method and circuit will be more simple and less cost.
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