含潮流控制器的改进节点附加注入法潮流计算

Power flow solution by improved node additional injection method with power flow controllers

通过对常规节点附加注入法和常规牛顿法的剖析比较,得出了常规节点附加注入法收敛性存在问题的主要原因在于等效附加注入项处理得不够全面。在此基础上,提出了改进的节点附加注入法,该方法在潮流方程的节点功率不平衡量中引入新的修正项,使潮流的收敛性得到改善。另外,针对常规节点附加注入PQ分解法的线性收敛特性,应用斯梯芬算法或埃特金δ2加速收敛手续对其进行加速处理,使算法的收敛性在一定程度上也得到了进一步改善,并使计算效率得到比较明显的提高。算例分析结果说明了上述两种方法的良好效果。

By comparing traditional node additional injection method with the Newton-Raphson method, this paper concludes that the main problem of the convergence of the injection method is caused by incompletely dealing with the equivalent additional injection items. On this basis, this paper proposes an improved node additional injection method, which improves the convergence of power flow iteration by introducing new correction items into the node power imbalance items of the power flow equation. In addition, the Aitken′s δ~2-process is used to accelerate the convergence of power flow based on the linear convergence characteristics of the traditional node additional injection PQ method. Thus, the convergence and efficiency of the algorithm are also further enhanced. The simulation results indicate that the two improved algorithms are better than the traditional ones.