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누설 전류 저감을 고려한 3레벨 태양광 발전 시스템의 스위칭 방법

Modulation Technique to Reduce Leakage Current in Transformerless Photovoltaic Systems Using a Three-Level Inverter

초록/요약

Transformerless photovoltaic (PV) systems are used because they have many advantages (weight, size, efficiency, etc.). However, transformerless PV systems suffer from leakage current. The present paper proposes a modulation technique to reduce leakage current in transformerless PV systems using a three-level inverter. The cause of the leakage current is analyzed. The proposed technique uses large vectors, medium vectors and only one zero vector, and switching occurs once in a switching period. The effectiveness of the proposed technique is verified by comparing its results with those of the space vector pulse width modulation (SVM) method. The results are obtained through simulation and experiment.

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목차

1장 서론 1
2장 태양광 발전 3 레벨 인버터의 누설 전류 4
2.1 Common mode voltage 유도 4
2.2 누설 전류 계산 6
3장 누설 전류 저감을 위한 3 레벨 인버터의스위칭 방법 10
3.1 SVM 스위칭 방법 10
3.2 제안하는 스위칭 방 13
4장 시뮬레이션 16
5장 실험 22
6장 결론 30
참고문헌 31

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