摘要
提出了一种适用于风电并网系统电压稳定判别指标,该方法是基于多指标加权的最优幂函数均值法,将Jacobian矩阵相互条件数估计与Jacobian矩阵解耦化为对角阵后的灵敏度逆阵元素判定指标相结合,并通过自编程序求解最优幂值n1、n2。为证明该方法的有效性和准确性,选取EPRI-36节点系统和蒙东某地区含大规模风电区域电网进行了计算分析。仿真结果表明,提出的指标与常规裕度指标相比,其计算速度快、误差小,且可在负荷较轻的情况下预测风电系统电压稳定情况,为评估风电并网系统的电压稳定性提供了一种理论分析方法。
This paper proposes an optimal mean power function index based on the weighted multi-index method for wind generation of grid-connected system. It combines the index of Jacobian matrix mutual condition number with the index of sensitivity inverse matrix elements. The power nl. n2 are obtained by the self program. The EPRI-36 node test system and a regional power grid containing large wind farms are selected to test the validity of the proposed index. The results show that this index has a shorter calculation time and accurate prediction compared to the traditional voltage stability indexes. It is available to predict the voltage stability of wind gener- ation of grid-connected system under lighter load and provide a new theoretical method to analyze the voltage stability.
出处
《东北电力技术》
2013年第1期1-4,共4页
Northeast Electric Power Technology
