A wind farm collection method for determining the safety threshold voltage of the grid region

The present invention relates to a method of determining the value of grid voltage secure domain region A wind farm collection belonging to the system security and power control technology. First, in order to ensure the normal operation of the wind farm network side of the fan is not off, the voltage of the wind farm side of the wind farm calculating the allowable range. Each wind farm then uploaded to the calculation grid wire wind plant control system set calculated in the reactive power station-side output current wind wire constraint, the calculation result returned wind farms. Iteration according to the preceding two steps until convergence. The method of the present invention fully contemplates the voltage of the main security constraints wind farm network side can be guaranteed after a wind farm off the network, the normal operation of other wind farms. And through rapid iteration, to achieve security domains to solve the voltage value of the grid voltage safety threshold calculated for the active power output of the wind farm has a certain robustness in favor of the voltage control grid.