Voltage and power flow control of grid connected wind generation system using DSTATCOM

Recently the usage of distribution generation has significantly increased in the electric power distribution system. Wind generation system has potential application for the grid support. The voltage of the direct driven permanent magnet wind generators (PMSG) is variable due to the intermittent nature of the wind energy. Fluctuating voltage and power is of major concern in the converter based grid connected wind generation systems. In this paper, a simple control strategy for grid voltage control using distribution static compensator (DSTATCOM) in the voltage control mode has been proposed. The grid voltage of a distribution system is controlled in respect of the wind variation, load variation and short time interruption of the source feeder. In addition it suppresses the harmonics at the grid terminals due to the nonlinear load. At the same time the power flow has also been regulated. The results are validated using PSCAD/EMTDC simulation studies.