A Microprocessor-Based Sub-Harmonic Protection Technique for Wind Farms
نویسنده
چکیده
Wind farms are generally located far away from load centers and, to increase the power flow, series capacitors are normally installed to compensate the transmission line reactance. The interaction of the series capacitor with the wind system can cause undamped sub-harmonic (below 60 Hz or 50Hz system frequency) current and voltage oscillations, which can cause serious damage to wind turbine controllers and also to conventional generators. A routine switching event in the Xcel Energy transmission system resulted in sustained oscillations between wind generators and the system connected through a series compensated line. This is the motivation behind the development of a new microprocessor-based sub-harmonic protection relay.
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