风电接入后电力系统动态仿真误差评估

Dynamic Simulation Error Evaluation of Power System After Wind Power Connection

大规模风电并网导致电力系统的动态响应特性发生了质变,这为评价系统仿真准确性带来了新的问题,传统的误差评价指标难以适用。基于对风电并网前后系统动态轨迹对比分析,讨论了传统误差指标的局限性,提出适用于风电并网的新型仿真误差评估方法,包括:分时段误差评估指标及总体指标。通过仿真计算,验证了基于风电机组动态特性建立的误差评估方法的有效性及优越性。

The large-scale wind power grid connection causes qualitative changes in the dynamic response characteristics of the power system,which brings new problems to the accuracy of the system simulation evaluation,and traditional error evaluation indicators are difficult to apply.Based on a comparative analysis of the dynamic trajectory of the system before and after wind power grid connection,this paper discusses the limitations of traditional error indicators,and proposes a new simulation error evaluation method suitable for wind power grid connection,including the time period error evaluation index and overall index.The validity and superiority of the error evaluation method established based on the dynamic characteristics of wind turbines were verified through simulation calculations.