Voltage Dip Induced Frequency Events in Wind Integrated Power Systems

Many power systems around the world are experiencing increased wind generation capacity, with different penetration targets set at national, and/or regional level. Wind power integration, especially at large scale, introduces various grid issues, with frequency and voltage stability being particularly critical concerns. The research work presented here investigates voltage dip induced frequency stability in large-scale wind integrated power systems: a potential risk that has received limited attention by the research community. With state of the art modelling, the potential impact of delayed active power recovery from wind generation following a network fault induced voltage dip is investigated. Fault induced voltage oscillations introduced by wind turbines, exacerbating frequency instability, are also examined. The impact of a voltage dip induced instantaneous power imbalance on system frequency stability is investigated for a wide range of wind penetration levels, with the results demonstrated on the New England benchmark system.