Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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New Active Damping Strategy for LCL-Filter-Based Grid-Connected Inverters with Harmonics Compensation

  • Hu, Guozhen (Dept. of Electronic and Electrical Eng., WuHan Textile University) ;
  • Chen, Changsong (Dept. of Electrical and Electronic Eng., Huazhong University of Science& Technology) ;
  • Shanxu, Duan (Dept. of Electrical and Electronic Eng., Huazhong University of Science& Technology)
  • Received : 2012.05.07
  • Published : 2013.03.20
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Abstract

The use of LCL filters in pulse width modulation voltage source converters is a standard solution for providing proper attenuation of high-order grid-current harmonics. However, these filters can cause the undesired effect of resonance. This paper proposes an active damping strategy with harmonics compensation. It can alleviate the harmonics around the resonance frequency caused by the LCL filters. The proposed strategy is attractive since it is simple, does not depend on grid parameters and does not increase the number of sensors. Simulation and experimental results verify the effectiveness of the proposed active damping strategy.

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References

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