Research On D-STATCOM Control Strategy And Its Drive Circuit Design

The control strategy of distribution static synchronous compensator D-STATCOM is the main research object of this paper. An improved i p- iq algorithm for detecting compensation reference current is mentioned. It can real-timely decompose the fundamental positive sequence active component of three-phase current, witch improves the speed and accuracy of compensation reference current detection. DC-side voltage of D-STATCOM can be maintained at a stable value by proportional-integral control. Through hysteresis control, the compensation current produced by D-STATCOM can accurately track its reference value. A digital simulation model of D-STATCOM is established in MATLAB/Simulink simulation software, and the simulation results show that the improved i p- iq algorithm and the control strategy used in this paper is correct and effective. At the end of this paper , the control system based on digital signal processor TMS320F2812 is designed, including the modules of hardware and the program of software.