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

The Korean Institute of Power Electronics (전력전자학회)
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Grid Voltage Estimation Method for Modular Plug-in Active Power Decoupling Circuits

모듈형 플러그인 능동전력디커플링 회로를 위한 계통전압 추종 방법

  • Kim, Dong-Hee (Dept. of Electronic & Electrical Engineering, Hongik University) ;
  • Kim, Jeong-Tae (Dept. of Electronic & Electrical Engineering, Hongik University) ;
  • Park, Sung-Min (Dept. of Electronic & Electrical Engineering, Hongik University) ;
  • Chung, Gyo-Bum (Dept. of Electronic & Electrical Engineering, Hongik University)
  • Received : 2021.03.02
  • Accepted : 2021.03.27
  • Published : 2021.08.20
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Abstract

A grid voltage estimation method for modular plug-in active power decoupling (APD) circuits is proposed in this study as direct replacements of electrolytic capacitors. Since modular plug-in APD circuits cannot have additional grid voltage sensors and should be operated independently without information exchange with the front-end converter, it is impossible to obtain the phase information of the grid directly. Therefore, the proposed method uses the second-order harmonic component of the DC-link voltage to estimate the grid voltage necessary to control the APD circuit. By employing the proposed method, the concept of modular plug-in APD circuits can be realized and implemented without direct detection of the grid voltage. The experimental results based on hardware-in-the-loop simulation (HILS) validate the effectiveness of the proposed control method.

Keywords

Acknowledgement

이 논문은 2020년 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임. (No. 2020R1F1A1071598)

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