Analysis and specification of DC side voltage in parallel active power filter with SVM control regarding compensation characteristics

DC side voltage is a very important parameter in the design of parallel active power filter (PAPF), but so far, very little discussion was conducted on it in a quantitative manner by previous publications. In this paper, an extensive analysis on the DC side voltage to the performance of PAPF with SVM control is made, and a specification of the DC side voltage rated values with different compensation results is presented. Two situations are analyzed. For first situation, through equivalent circuit analysis and Fourier Transform analytical expressions, a required minimal value of DC side voltage for full compensation is obtained for six-pulse converter harmonic current. For the situation, of which the DC side voltage is smaller than the above-obtained minimal value, the quantitative relationship between the DC side voltage and the total harmonic distortion after compensation is also elaborated in the paper by using the diagram of curve. Based on these analyses, the specification of DC side voltage rated value for PAPF with SVM control is quite straight forward.

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