Control Strategy of SVG for Sub-synchronous Oscillation of Large-Scale Wind Farms Suppression

In recent years, the installed capacity of wind-driven power is increasing continuously in China, but the main measure for long-distance transmission with wind power integration now is series capacitive compensation due to the inverse distribution of wind energy resources and load center in China. However, similar to the thermal generator set, the sub-synchronous oscillation phenomenon may also occur in the wind generation set when the power is transmitted via the fixed series compensated line or HVDC system. This article will discuss how to suppress similar problems in the large-scale wind farms using SVG according to the experience of some Chinese power plants to suppress the sub-synchronous resonance using SVC and SVG in the past two years.