宋平岗,江浪,李云丰.两相坐标系下MMC环流抑制策略[J].电测与仪表,2014,51(20):. Song Pinggang,Jiang Lang,Li Yunfeng.Circulating Current Suppression Control strategy of MMC under Static Coordinate[J].Electrical Measurement & Instrumentation,2014,51(20):.
两相坐标系下MMC环流抑制策略
Circulating Current Suppression Control strategy of MMC under Static Coordinate
The double frequency negative circulating current among MMC three phases increase the voltage fluctuation of capacitor, arm current distortion, system losses and electro- magnetic interference, although they do not influence the outer circuit. Combining carrier phase shifted modulation strategy with sorting algorithm, a circulating current suppression control strategy is proposed without rotating coordinate transformation by adopting proportion resonance integral controller under αβ coordinate. Finally, a MMC-HVDC simulation system is constructed in MATLAB/Simulink and the simulation results show that the proposed strategy is correctness and validity.