The emergency control strategies of short-run isolated island wind farm

Tripping off of the centralized grid-connected large-scale wind farm will have an impact on the grid frequency. When a failure occurs nearby the point of common coupling, in order to ride through the fault, it's a feasible strategy to turn the wind farm into isolated island operation for a short time and reconnect to the grid after the fault isolation. In order to achieve the condition for grid-reconnection, the frequency control characteristics of wind farms are analyzed in this paper and a reasonable short-term emergency control strategy of isolated island is proposed using the equivalent inertia. Furthermore, a simulation is carried out to verify the correctness of the strategy.

I. Introduction (Heading 1)

Unlike distributed grid-connected wind power that is common in Europe, many large-scale centralized wind farms are set up in remote areas with abundant wind resources in both China and the United States, thus restricted by the location and line corridors, concentrated connected to the grid is often adopted in form of wind farm clusters. Since wind power is primary energy with features of low energy density, large fluctuations and cannot be directly stored, the accident rate in wind power concentrated area is much higher than that of the conventional thermal power grid area[1].