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A novel hybrid current control method applied in threephase four leg APF

LIU Hai-chun,XIE Shao-jun,WANG Guo-feng   

  1. College of Automation Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China
  • Received:2007-09-22 Revised:1900-01-01 Online:2007-12-24 Published:2007-12-24
  • Contact: LIU Hai-chun

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Abstract: Based on the analysis of circuit of threephase fourleg APF, conclusion was put forth, which means that the current control of three power legs is independent from the neutral leg. A novel hybrid control method was presented. SVM was used to control the output current of three main power legs, while hysteresis current control was applied to control the output current of neutral leg. As a result, current control of four legs was decomposed into the control of three main power legs and the control of neutral leg, which can sharply simplify the current control of APF. Compared with other current control methods, this new method has advantages such as easy to calculate, control and realize. The simulation results proves the correctness of this method.

Key words: APF, hybrid control, SVM, hysteresis current control

CLC Number: 

  • TM-46
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