Coordination of DFIG and STATCOM in a power system

Coordination of STATCOM and DFIG becomes necessary during steady-state as STATCOM exists in the system to improve the fault-ride through capability of DFIG. This paper aims to perform the coordination by means of minimizing the power loss of the system. As reactive power flow in the system has direct impact on the loss of the system, utilizing reactive power sources effectively can reduce the loss. Stator of DFIG, Grid-side converter (GSC) of DFIG and STATCOM are considered to be the sources of reactive power supplying a local load. An optimization algorithm is proposed and MATLAB optimization toolbox is used to implement the algorithm. Since the loss of GSC is found to be smaller in compare to the loss of STATCOM, investing in larger GSC is suggested in order to minimize the loss of the system.