A design approach for DC voltage controller of CHB-based STATCOM

WSEAS Transactions on Circuits and Systems(2013)

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摘要
In this paper, a novel parameter design approach of the PI controller used for individual DC voltage balancing control of cascaded H-bridge converter-based STATic synchronous COMpensator(STATCOM) is presented. By means of phase shift sinusoidal pulse width modulation, using two control loops(DC voltage control loop and phase angle shift control loop) to ensure DC voltage balance, the proposed approach can calculate parameters of the PI controller of the two control loops relative accuratelyby finding the relationship of the input and output of PI controller, The simulation and experimental results verify that the proposed method has good effects of balancing individual DC voltage, meanwhile, it makes the system a good dynamic performance.
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关键词
CHB inverter,DC voltage controller,Parameter design,Sinusoidal pulse width modulation,Static synchronous compensator (STATCOM)
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