摘要
概率潮流计算是电力系统稳态运行分析的重要工具。针对配电网中存在的三相支路参数不对称与三相负荷不平衡对电力系统运行特性的影响,提出了一种基于半不变量的电力系统三相概率潮流建模方法。将三相负荷波动作为节点注入功率的变化,采用线性化的潮流方程计算节点电压与支路潮流等随机变量的半不变量。以33节点辐射状系统为算例进行仿真计算,验证了该算法的合理性与正确性。
Probabilistie power flow ealeulation is the important tool for steady state analysis of power system. In terms the effect of asymmetric three-phase line parameter and unbalanced load upon the operation eharaeteristie of power system,a modeling method of three-phase probabilistie power flow calculation is proposed for power system based on Cumulant method. Three-phase load fluctua- tions are taken as the change of node power injection, and eumulants of output random variables sueh as node voltage and line power flow could be obtained by using linear power flow equation. Radial 33-bus distribution system is used in the simulation calculation. Compared with results of Monte Carlo method,the results rectify the effectiveness and ac.curaey of presented ealculation method.
出处
《陕西电力》
2017年第4期44-49,共6页
Shanxi Electric Power
关键词
半不变量法
三相概率潮流
蒙特卡罗法
配电网
cumulant method
three-phase probabilistic power flow
Monte Carlo method
distribution system
