Subsynchronous resonance characteristics in presence of doubly‐fed induction generator and series compensation and mitigation of subsynchronous resonance by proper control of series capacitor

This study investigates the subsynchronous resonance (SSR) characteristics in the systems with doubly‐fed induction generators and series compensated ac lines, by using the transfer‐function analysis approach. A new SSR mitigation method by a proper control of a series capacitor (SC) is also presented with the effectiveness evaluated. SSR mitigation by a proper control of the SC is attractive since it does not incur any additional cost. This shows that there are no technical obstacles to use a series compensation as a means to improve the power transmission capability in the systems with a high wind energy penetration.