| Wind energy is an inexhaustible and clean resource, which can alleviate the energy crisis and environment pollution effectively. In the past few decades, the installed capacity and technology of wind power have facilitated its rapid development, which played a positive role for solving global energy problems. However, due to intermittent, the controllability and other shortcomings of wind power as well as the changed trend of flow distribution caused by the access of the wind farm. These negative factors will affect the voltage stability of the grid, so the use of wind power has been limited. It is necessary to study the voltage stability when large-scale wind farm accessed to the power system for the better development and utilization of wind resources.In order to solve the above problems, this paper studies the influence of wind farm integration on power system voltage stability. Introduced the development of voltage stability and analyzed the reason which leads to voltage stability problem, characteristics of wind power and technical problems when the wind farm accessed to power system. Improved the existing wind power RX iterative model and improved the step control link of general continuous power flow to enhance computational efficiency of the continuous flow method. The improved continuous flow method including wind farms by combining the improved wind power RX iterative model and the improved continuous flow method is established.It is verified the correctness of the algorithm used in this paper and calculated the stability margin of IEEE14nodes system through the improved continuous flow method including wind farms. The influence of wind farm integration on power system voltage stability is analyzed. Suggest improvements according to the existing problems and carry out the simulation again. The results show that the algorithm can be effectively applied to power systems including wind farms. The voltage fluctuations information is given, when the wind farms cut down. |
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