基于线性功率-电压方程的快速潮流计算方法

Fast power flow calculation based on linear power-voltage equation

针对大电网存在大量电阻电抗比偏大的串联支路的问题,提出并实现了一种快速潮流解算方法,该方法基于线性功率-电压方程构造迭代修正方程,迭代初值通过基于支路电阻电抗比的PQ法获得,并在迭代过程中设置加速收敛乘子以保证收敛性和求解精度。该方法中电压修正方向直观明了,易于编程实现。算例小系统和南方电网实际系统的潮流解算测试,表明了该方法具有较高的准确性和较好的适应性。

For large power grid with plentiful serial branches of large resistance-reactance ratio,a fast power flow calculation method is proposed and realized,which builds the iterative modification equation based on the linear power-voltage equation and the initial iterative value is calculated using the PQ method based on the continuation of branch resistance-reactance ratio.An accelerating convergence factor is added to the iterative process to ensure the convergence and solving accuracy.Its voltage modification direction is simple and clear,suitable for programming.The power flow calculations for a small system case and the practical Southern Grid show that,the proposed method is of high accuracy and good adaptability.