Research on improving the fault ride-through capability wind farm by utilizing STATCOM

With the continued growth of wind power installed capacity, as well as the continual emergence of large-capacity wind farm, the impact of wind power on the grid will not be ignored. Studying on the performance characteristics of wind turbine and analyzing the effects on grid and the generators are of great significance to ensure the grid-connected wind turbine safe and reliable operation. In this paper the dynamic model of the induction generator and doubly-fed induction generator of wind turbines are built in PSCAD. Additionally, the static synchronous compensator (STATCOM) model and a vector control method are prompted. The simulation of a single machine infinite bus system containing a wind farm is conducted, which includes two different kinds of wind turbines. By comparing the active power, reactive power, and the output voltage of two different kinds of wind turbines, the effect of STATCOM on fault ride-through capability of wind generators is analyzed when the grid voltage dropped. Simulation result shows that STATCOM has played a big role in maintaining the transient voltage stability of the power system and improves the fault ride-through capacity of wind farms.