Consideration of Voltage Control Range Calculation and Its Impact in 3/2-Phase Switching Inverter for Short-Circuit Faults; [단락사고에 대한 3/2상 절체형 인버터에서 전압제어 범위의 산정 및 파급효과 고찰]

초록

This study addresses power quality degradation issues caused by short-circuit faults in 3/2-phase switching inverters by estimating and applying an optimized voltage control range. The ripple effects, including voltage distortion, power factor reduction, and efficiency loss due to the reduction in maximum phase voltage during a short-circuit event, were analyzed using PSIM simulations. Based on these analyses, the application of a voltage control range for the DC-link capacitor effectively reduced phase voltage waveform distortion, improved overmodulation issues, and maintained power factor and apparent power. Consequently, this study provides a solution to enhance the stability and reliability of renewable energy systems while maintaining power quality and maximizing energy efficiency. © The Korean Institute of Electrical Engineers.

키워드