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

  • 제27권2호
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  • Pages.126-133
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  • 2022
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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단전원 듀얼 인버터의 데드타임으로 인한 영상전류 억제 방법

Suppression of Zero Sequence Current Caused by Dead-time for Dual Inverter With Single Source

  • Yoon, Bum-Ryeol (Dept. of Electronic & Electrical Engineering, University of Dankook) ;
  • Kim, Tae-Hyeong (Dept. of Electronic & Electrical Engineering, University of Dankook) ;
  • Lee, June-Hee (Propulsion System Lab, Korea Railroad Research Institute) ;
  • Lee, June-Seok (Dept of Electronic & Electrical Engineering, University of Dankook)
  • 투고 : 2021.11.30
  • 심사 : 2021.12.14
  • 발행 : 2022.04.20
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초록

This study proposes a suppression of zero sequence current (ZSC), which is caused by zero sequence voltage (ZSV) for a dual two-level inverter with single DC bus. Large output voltages enable the dual inverter with single DC bus to improve a system efficiency compared with single inverter. However, the structure of dual inverter with single DC bus inevitably generates ZSC, which reduces the system efficiency and causes a current ripple. ZSV is also produced by dead time, and its magnitude is determined by the DC bus and current direction. This study presents a novel space vector modulation method that allows the instantaneous suppression of ZSC. Based on a condition where a switching period is twice a sampling (control) period, the proposed control method is implemented by injecting the offset voltage at the primary inverter. This offset voltage is injected in half of the switching period to suppress the ZSC. Simulation and experiments are used to compare the proposed and conventional methods to determine the ZSC suppression performance.

키워드

과제정보

본 연구는 국토교통부 및 국토교통과학기술진흥원에서 지원하는 철도기술연구사업(과제번호: 22RTRP-C146008-05)과 정부(과학기술정보통신부)의 재원(과제번호: 2020R1G1A1100297)으로 한국연구재단의 지원을 받아 수행되었습니다.

참고문헌

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