小阻抗支路对潮流计算收敛性的影响和处理

Influence and processing of small impedance branches on the convergence of load flow calculation

常规潮流算法在应用于含小阻抗支路电网的计算中存在有收敛性问题。通过对含小阻抗支路电网算例的试算分析发现,在当前普通个人计算机性能条件下,使用双精度类型变量,利用高斯赛德尔法迭代两次选取初值后再使用牛顿拉夫逊法,不需要附加处理就可以解决含小阻抗支路电网潮流计算收敛性问题。将该方法应用于三个地区级电网能量管理系统的调度员潮流计算模块,表明所提方法对于解决实际问题的可行性和有效性。

There is convergence problem, in the load flow calculation with small impedance branches. It is found that using double type variations and the approach which are using Gauss-Seidel method twice to choose initial numbers and then using Newton-Raphson method in the ordinary person computer can solve the convergence problem without any additional conditions , after the analysis of the calculating experiment of the practical project with small impedance branches. Calculation on three examples of practical regional Power Grid EMS proves the feasibility and the validity of the proposed approach.