STATCOM Control Strategy Based on Modular Multilevel Converter
M-STATCOM,a new type of static synchronous compensator (STATCOM),is presented based on modular multilevel converter (MMC),which is superior in high modularity,high voltage level,low loss and equivalent switching with high frequency.This paper elaborates the its characteristics and operating principles,and proposes a dualloop control strategy for the operation condition of its reactive power compensation,where proportional resonant (PR) controller is used in current inner loop for load reactive power compensation.Simulation experiments have been done on eleven-level M-STATCOM,whose results have validated the effectiveness of the proposed control strategy.
modular multilevel converterSTATCOMreactive power compensationpower unitPR controller