With the background of large-scale wind power integration grid, in order to reduce wind farm voltage fluctuation and the grid loss, through the scenario analysis method, the objective function model was established to determine the best SVCs compensation capacity and compensation point. Firstly, the initial operation states of the wind power systems were obtained by the Monte Carlo sampling and power flow was calculated to get the reactive power compensation point and its capacity. Then the result of optimization model was calculated by the improved genetic algorithm. IEEE 30 system was taken as an example for the simulation calculation and the calculation results verify the validity of the model.

Abstract. The paper summarizes the methods about the transmission development planning which considers risk factors. It introduces the transmission network flexible planning method based on the uncertain factors, the mathematical optimization method and a heuristic method. Then we discuss the way to deal with risks about transmission network planning. Given that, we proposed the future research direction.

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