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A novel output LC filter design method of high power three-level NPC converter

Ning Li, Na Zhi, Hui Zhang, Yue Wang, Zhaoan Wang

Open publisher page 7 citations

Abstract

For high power three-level Neutral Point Clamped (NPC) converter widely used in medium voltage speed regulation system, which has the characteristics of low switching frequency and complex harmonic distribution of output current waveform, output filter is needed in order to protect AC-side device. Normally, LC filter is used for its good performance. However, the low switching frequency and complex harmonic distribution lead to the design difficulties of the output LC filter. In this paper, on the basis of theoretical analysis, a novel design method of the output LC filter used in three-level NPC converter basing on minimum reactive power is proposed and the parameter design formula is deduced. Simulation results are given to demonstrate the validity of this new method.

About this research paper

What this paper is about

For high power three-level Neutral Point Clamped (NPC) converter widely used in medium voltage speed regulation system, which has the characteristics of low switching frequency and complex harmonic distribution of output current waveform, output filter is needed in order to protect AC-side device. Normally, LC filter is used for its good performance. However, the low switching frequency and complex harmonic distribution lead to the design difficulties of the output LC filter. In this paper, on the basis of theoretical analysis, a novel design method of the output LC filter used in three-level NPC converter basing on minimum reactive power is proposed and the parameter design formula is deduced. Simulation results are given to demonstrate the validity of this new method.

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OpenAlex reports 7 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

For high power three-level Neutral Point Clamped (NPC) converter widely used in medium voltage speed regulation system, which has the characteristics of low switching frequency and complex harmonic distribution of output current waveform, output filter is needed in order to protect AC-side device. Normally, LC filter is used for its good performance. However, the low switching frequency and complex harmonic distribution lead to the design difficulties of the output LC filter. In this paper, on the basis of theoretical analysis, a novel design method of the output LC filter used in three-level NPC converter basing on minimum reactive power is proposed and the parameter design formula is deduced. Simulation results are given to demonstrate the validity of this new method.

Key concepts: Control theory (sociology), Filter (signal processing), Waveform, Harmonic, Filter design, Low-pass filter, Electronic engineering, Harmonic analysis

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