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Integration of large scale wind farms into the electrical grid poses challenges due to the variable nature of the source of energy and the fact that induction generators, used in the wind turbines, lacking the voltage regulation capability or even, in some types, requiring reactive power support during operation. To solve this problem, large reactive power support is normally required and is usually provided by Flexible AC Transmission systems (FACTS) devices such as Static Var Compensator (SVC) or Static Synchronous Compensator (STATCOM). Due to the high investment cost of those equipment, an alternative solution using the existing infrastructure of wind and solar farms is investigated and proposed in this paper. The feasibility of the solution is verified using the case studies on the benchmarking system IEEE 39 Bus system performed under DIgSILENT/Power Factory platform.