Distributed STATCOM for controlling Output voltage of wind turbine generator

This paper describes analysis and control design of a distribution level static synchronous compensator (DSTATCOM) to control the voltage at the PCC in order to keep the power constant at the load from intermittent wind speeds. For fast response requirement, a feedforward compensation scheme is derived and employed in the paper. Firstly, the mathematical model of the DSTATCOM is derived. Then the compensation principle is described with applying RDFT in order to immune any undesired signals. Accordingly, a hardware prototype is built with a fix-point DSP TMS320F2812-based system. Use of a current-controlled PWM inverter as the power stage of the DSTATCOM generates needed compensation currents for real-time load compensation. Finally, experimental results confirm the performance of the proposed DSTATCOM.