最优乘子法在电流注入型保留非线性潮流计算中的应用  

Application of optimal multiplier method in retaining-nonlinearity power flow calculation based on current-influx model

作　　者：李宝国[1] 鲁宝春[1] 姜丕杰[1] LI Baoguo;LU Baochun;JIANG Pijie(College of Electric Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学电气工程学院

出　　处：《电力系统保护与控制》2019年第24期139-144,共6页Power System Protection and Control

基　　金：辽宁省教育厅项目资助(JFL201715401)~~

摘　　要：随着电力系统规模的扩大,对电力系统潮流算法的收敛性和计算速度提出了更高的要求。为此,提出一种带有最优乘子的电流注入型保留非线性潮流计算方法。首先根据直角坐标系潮流方程的特点,给出了一种最优乘子的计算方法,该方法只需求解一元三次方程,不需再额外增加任何计算量。在此基础上,将最优乘子应用于电流注入型保留非线性潮流计算,在潮流计算迭代过程中,采用最优乘子调整电压修正量,提高了潮流计算的收敛可靠性和收敛速度。系统算例表明,所提出的方法能在潮流方程无解时保证潮流不发散,在潮流方程有解时提高潮流计算速度。With the expansion of power system scale, higher requirements are imposed on convergence and calculation speed of power flow algorithm. Therefore, a retaining-nonlinearity flow algorithm based on current-influx model with optimal multiplier is proposed. According to the characteristics of the power flow equations in rectangular coordinate, a method for calculating the optimal multiplier is given firstly. This method only needs to solve a unary cubic equation without adding any additional calculations. On this basis, the optimal multiplier is applied to the retaining-nonlinearity flow algorithm based on current-influx model. In iterative process of power flow calculation, the optimal multiplier is used to adjust the voltage correction. The convergence reliability and convergence speed of power flow calculation are improved. Numerical examples show that the proposed method can ensure that the system flow is non-divergent when the flow equation has no solution, and can improve the calculation speed when the flow equation has a solution.

关 键 词：电力系统 最优乘子法 潮流计算 保留非线性 电流注入型 

分 类 号：TM744[电气工程—电力系统及自动化]