Optimal placement of facts units for minimizing the impact of voltage sags in power networks with high wind energy penetration

This paper presents a methodology for the optimal placement of wind farms and FACTS units in power networks, in order to guarantee the voltage profile and to maximize the loadability of the system under voltage sags conditions. Results shown in the paper indicate that the proposed formulations can be used to determine which the best buses are where the addition of Var sources can enhance the voltage stability of the whole network.