SYSTEM STABILIZATION DEVICE, METHOD, AND WIND-POWER GENERATION SYSTEM

It is an object to supply stable reactive power without requiring large-scale civil engineering work. The invention provides a utility grid stabilization apparatus 2 to be applied to a generating system including a generator having a squirrel-cage induction generator 13 to generate electric power using natural energy and a connection switching section 14 provided between the generator and a utility grid 15 to switch between connection and disconnection of the generator and the utility grid 15 to and from each other, the apparatus including a reactive power regulating section 21 for supplying or absorbing reactive power to or from the utility grid 15 when voltage of the utility grid 15 satisfies a preset variation condition and the generator is disconnected from the utility grid 15.