Distribution static compensator based on an improved direct power control strategy

In this study, an improved direct power control strategy based on the deadbeat current control with adaptive ability is proposed for three-phase distribution static compensator (DSTATCOM), whose current references are directly computed by power reference and power feedback according to the instantaneous power theory, and the deadbeat current control is used to assure the current waveform quality. The improved direct power control strategy does not need phase-locked loop, and not exists the coupling among the control variables of DSTATCOM. Moreover, the proposed control strategy has good dynamic response and adaptive ability, and its design process is very simple. At last, the feasibility and validity of the proposed control strategy are verified by the simulation and experiment results.