Capacitor Voltage Balance Control of Active Neutral Point Clamped Five-Level Inverter
CSAA/IET International Conference on Aircraft Utility Systems (AUS 2018)(2018)
摘要
The prospects for the active neutral point clamped five-level inverter are broad in medium-voltage high-power applications. This paper has analyzed the relationship between dc-link capacitors voltage and neutral point current and then proposed a control strategy based on zero-sequence voltage injection to regulate the voltage across the dc-link capacitors. In view of an excessive fluctuation of the voltage across Flying capacitors, a more accurate control method is proposed by introducing the auxiliary modulation wave. The simulation results show that the proposed control methods are feasible and effective.
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关键词
active neutral point clamped five-level,carrier phase-shift PWM,zero-sequence voltage,auxiliary modulation wave
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