Electronic Science and Technology ›› 2019, Vol. 32 ›› Issue (5): 62-67.doi: 10.16180/j.cnki.issn1007-7820.2019.05.012

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Research on Improved Dual Switch Table Direct Power Control Strategy

HU Huizhi1,2,JI Peirong1,2,ZHANG Yunning1,2,WU Zhang’ao3   

  1. 1. School of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China
    2. Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,China Three Gorges University, Yichang 443002,China
    3. Gongan Power Supply Company,Hubei Power Supply Company,Gongan 434300,China
  • Received:2018-07-09 Online:2019-05-15 Published:2019-05-06
  • Supported by:
    National Natural Science Foundation of China(61603212)


In order to effectively solve the problem that the dynamic sector direct power control strategy of the voltage type three-phase PWM rectifier has a large difference between the input power and the specified power, a new double switch DPC regulation mechanism was studied in this paper. By introducing a three state hysteresis comparator, a new power amplitude control function was formed. The switch table and the switch vector were selected by the system according to the power amplitude control function and the output value of the three state hysteresis comparator, so that the rectifier could choose the appropriate switch vector based on the real time power difference. Finally, compared with the MATLAB/Simulink simulation of the traditional dynamic sector DPC strategy, the double switch DPC strategy could effectively improve the DC side output voltage characteristics and reduced the reactive power ripple.

Key words: direct power control, dual switch table, three state hysteresis comparator, power amplitude control function, output voltage characteristics, reactive power ripple

CLC Number: 

  • TP211+.4