Voltage compensation for wind integration in power systems

The fast growth of wind generation leads to concern about its effects on electric grid. The wind power integration needs to be ruled by specific voltage and frequency requirements. As concerns voltage support, wind farm are called to guarantee a reactive power regulation range at point of common coupling (PCC). Moreover, in the presence of voltage dips or fault conditions, wind generators should be able to respect low-voltage ride-through curves to contribute to grid regulation and avoid sudden unbalances. In this paper, different control strategies of wind farm are evaluated, in order to comply with grid code requirements for voltage support. In particular, reactive power and voltage regulation is carried out through generator power factor variation and by static compensation devices as SVCs. Simulations are performed on a wind farm connected to IEEE 14-Buses test system in the presence of grid fault condition.