高渗透率风电并网对电力系统失步振荡的影响

摘要

With the increasing scale of wind power integration , the impact on out-of-step oscillation of power system cannot be underestimated .In this paper , for the research of the influence of wind power integration on power system out-of-step oscillation, firstly, the PSD-BPA software is used to establish wind-thermal-bundled equivalent single-ma-chine infinite-bus system , the timeliness of the splitting device is innovativly used as a judgment of the degree of the system out-of-step.Now, we can carry on simulation and analysis from four aspects as follows:the wind permeabil-ity, whether the wind farm is equipped with reactive power compensation or not , the type of wind turbines and differ-ent operation modes of wind turbines .Corresponding to the above four aspects , the results show that the larger scale of wind power integration , when the wind farm has reactive power compensation , with the constant speed wind cage type machine and in the constant voltage operation mode are conducive to curb power grid out -of-step oscillation , which also can improve the transient stability of the system .%随着风电并网规模的持续增长，风电对电力系统失步振荡的影响不可小觑。文中利用PSD－BPA仿真软件建立“风火打捆”等值单机无穷大系统，创新的采用解列装置动作的时效性作为判断系统失步程度的依据，从风电并网比例、风电场是否配备无功补偿、风机类型以及风电机组运行方式四个方面仿真分析风电并网对电力系统失步振荡的影响。结果表明，对应以上四方面当风电并网容量越多、风电场具备无功补偿、采用笼型恒速风机及风机采用恒电压运行方式时有利于抑制系统的失步振荡，提高系统的暂态稳定性。