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An Improved One Cycle Control for Active Power Filters under Non-Ideal Voltage Conditions

  • Wang, Lei (College of Electrical and Power Engineering, Taiyuan University of Technology) ;
  • Ren, Chunguang (College of Electrical and Power Engineering, Taiyuan University of Technology) ;
  • Yang, Yu (Shanxi Electric Power Corporation) ;
  • Han, Xiaoqing (Shanxi Key Lab of Power System Operation and Control, Taiyuan University of Technology) ;
  • Wang, Peng (Nanyang Technological University)
  • Received : 2016.04.22
  • Accepted : 2016.08.27
  • Published : 2016.11.20

Abstract

The one cycle control (OCC) scheme for active power filters (APFs) has shown excellent harmonic suppression and implementation simplicity. However, its real world application is limited because the non-ideal supply voltage for APFs can influence its performance so that the source currents are still distorted after compensation. This paper proposes a modified one cycle control (MOCC) scheme to improve the performance of three-phase shunt APFs under non-ideal supply voltage conditions. In this paper a detailed mathematical derivation has been presented and the key control law of the MOCC has been developed for adaption to the non-ideal supply voltages, following the control philosophy of simplicity. A relatively simple sequence filter is introduced to extract the harmonic components of supply voltages. The modified scheme can be easily implemented. The proposed control strategy has excellent performance and a 5kVA APF hardware platform has been implemented to validate the feasibility and performance of the proposed strategy.

Acknowledgement

Supported by : Shanxi Province Scientific Research Foundation

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