The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Interleaved PWM Inverter with Paralleled LCL Filter for Grid Connection

계통 연계를 위한 병렬 LCL 여파기용 Interleaved PWM 인버터

  • Received : 2022.01.29
  • Accepted : 2022.02.14
  • Published : 2022.08.20
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Abstract

In this study, an inverter system connected to a grid through a paralleled LCL filter is proposed. The system consists of two inverters paralleled and operated with interleaved PWM for powering up and performance improvement. Two LCL filters have two separate filter inductors and one set of filter capacitor and grid inductor in common. The differential mode current circulates through two inverters and two filter inductors. The differential mode current is removed from the filter capacitor and the power grid. Accordingly, performance improvement can be achieved due to the reduced currents in the filter capacitor and the reduced harmonics into a grid. A single-phase prototype has been made and tested, and the proposal has been verified.

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Acknowledgement

본 논문은 부경대학교 자율창의학술연구비(2020년)에 의하여 연구되었음

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