Research On Voltage Control Strategy Of Distribution System With Wind Power Integration

To ease the contradiction between supply and demand of global energy and environmental pressure and accelerate the "clean substitution and electric energy replacement", a large range of wind power should be accessed to power distribution network to form “energy Internet”. With continuous improvement of wind power technology, the scale of wind farms connected to the power grid has further expanded and causes many problems as well. Wind power has the characteristics of intermittent and volatility, and the large scale being access to the distribution network may cause stability problems. The output fluctuation of wind turbine generator will cause voltage fluctuations, especially at the point of common coupling(PCC) of wind power in distribution network.In view of the above problems, this paper established the wind speed probability model, wind speed correlation model and wind power conversion model. Then, the voltage characteristics of doubly-fed wind farms, squirrel-cage wind farms and direct-drive wind farms are studied respectively, and the existing power-collecting topology methods are summarized, and the topological methods are summarized. And the influence of different topologies on the voltage distribution is analyzed. In this paper, the topology and control method of the distribution network with wind power access are analyzed. The voltage control and the optimal voltage distribution are analyzed and studied in the stable operation of the distribution network. The voltage control strategy is proposed. The IEEE 14- 16 node distribution network as an example to verify the effectiveness of the proposed voltage control strategy.