Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Design of LCL Filter through Inductor Optimization Method in Grid-Connected Inverter

계통연계 인버터의 인덕터 최적화 기법을 통한 LCL 필터 설계

  • Jang, Jae-Ha (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Kim, Kyeong-Hwa (Dept. of Electrical and Information Engineering, Seoul National University of Science and Technology)
  • 장재하 (서울과학기술대학교 전기정보공학과) ;
  • 김경화 (서울과학기술대학교 전기정보공학과)
  • Received : 2014.08.13
  • Accepted : 2014.09.11
  • Published : 2014.11.28
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Abstract

A grid-connected inverter used for renewable energy resources produces harmonic components in the switching frequency. To effectively reduce switching harmonic components, several types of filter are generally used in the output stage of the grid-connected inverter. Many research works on LCL filter design have been done to maintain the performance with low cost. However, it is not easy to make the filter design be economical and optimal due to the varying characteristic of magnetic core and redundancy design by experience. In this paper, a design method for a LCL filter is presented through the inductor optimization scheme in view of the size and cost when the inductor is manufactured using the magnetic core. The effectiveness is verified through tests using a 3kW grid-connected inverter by simulations and experiments.

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References

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