DC-bus voltage control strategy of DSTATCOM using modulation-ratio-regulation for start-up process

Distribution STATic synchronous COMpensator (DSTATCOM) can be used for reactive and harmonic current compensation. The safety and reliability of DC-bus voltage control are critical in practice in both dynamic process and steady state, especially for the ones of DC-bus self-regulation. This paper proposes a modulation-ratio-regulation based control strategy for the setup of DC-bus voltage of DSTATCOM. It can also ameliorate the current and voltage impulsion. Both the MATLAB/Simulink model and the experimental prototype have been established. Simulation and experiment results validate the effectiveness and feasibility of the proposed method.