潮流计算收敛问题的离散模型校正方法

摘要

为提高潮流计算收敛特性,提出了在离散域中对计算数据建模校正的方法.该算法在迭代计算时,监视网络中节点电压数据的变化;判断数据出现振荡后,建立离散系统模型进行等效分析;使用输出反馈的方法,将系统特征根转移到收敛域,使迭代计算脱离振荡.以IEEE 33节点系统和一个具有198节点配电网为算例,验证算法的正确性.本文方法在付出少量存储空间和运算量代价的同时,可使潮流运算程序成为闭环算法,算法有广泛的适用性.%An approach to modeling and correcting the computational data in discrete domain is presented in this paper to improve the convergence properties of power flow calculation.The proposed algorithm monitors the changes of node voltage data in the network during iterative computation;after the oscillation of data is judged,a discrete system model is established to conduct equivalent analysis;the eigenvalues of the system can be transferred to the convergent domain using an output feedback method,so that the iterative computation can avoid the oscillation.The correctness of the algo-rithm is verified by taking an IEEE 33-node system and a 198-node distribution network as numerical examples. The proposed algorithm can make the power flow calculation program become a closed loop algorithm at the cost of a small amount of storage space and computation load,thus it has a wide range of applicability.