基于分岔理论的风电场电压稳定性评估

The assessment of wind power integration based on forking theory to voltage stabilization

风能作为一种清洁能源在电力系统中得到了越来越大规模的应用。风力发电机组不断向大型化发展,但由于风力的随机性和间歇性特点,不能保证输出平稳的电功率,这对电网的安全运行带来了困难和挑战。介绍了分岔的概念,评述了分岔理论在静态电压稳定和动态电压稳定中的应用,重点介绍了鞍结分岔点和Hopf分岔点的求取。通过电网电压的分岔点,可以有效的评估电网安全稳定性及风电穿透功率极限。

As a clean energy,wind power has been more and more applied in power system.The wind turbines keep on developing to a large capacity level.However,the randomness and intermittent of nature wind can not guarantee a stable electric power output,which has brought a lot of problems and challenges to the operation of power grid.The paper briefs the forking concept,appraises application of the forking theory in both static and dynamic voltage stabilization,puts emphasis on the introduction of deriving a saddle forking point and a Hopf forking point.Though voltage stability,evaluate the impact of a large-scale wind farm to the power grid.