带最优乘子牛顿法在交直流系统潮流计算中的应用  

Application of Newton Load Flow Methods with Optimal Multiplier for AC/DC Power Systems

作　　者：胡泽春[1] 严正[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200240

出　　处：《电力系统自动化》2009年第9期26-31,共6页Automation of Electric Power Systems

基　　金：教育部博士点新教师基金资助项目(200802481009);国家自然科学基金资助项目(90612018)~~

摘　　要：交直流系统潮流计算的统一迭代法的收敛性较交替迭代法更优,但对一些病态运行条件和潮流无解的情况,统一迭代法将发散,得不到有用信息。文中将交流系统中广泛应用的最优乘子潮流方法推广到交直流系统的潮流计算中。根据直流系统稳态方程的特点引入辅助变量,使得直流系统潮流方程全部转换为二次或线性方程。给出了直角坐标系和极坐标系下交直流系统带最优乘子牛顿法潮流的实现方法。通过算例验证了所述方法的有效性,并对2种坐标系下的结果进行了比较和分析。The overall convergence performance of the unified iteration methods is better than that of the alternative iteration methods for load flow calculation of AC/DC power systems. But for some ill-conditioned or unsolvable cases, the unified iteration methods may be divergent, and could not give useful information. The widely used optimal multiplier in power flow calculation for AC power systems is expanded to the hybrid AC/DC power systems. According to features of DC system steady equations, auxiliary variables are introduced to transform them to equations with quadratic or linear forms. The implementation approaches of Newton load flow methods with optimal multiplier in rectangular and polar coordinates are given. Test results show the effectiveness of the proposed approaches, and the results obtained in rectangular and polar coordinates are Compared and analyzed.

关 键 词：潮流计算 牛顿法 最优乘子 直角坐标和极坐标系 交直流系统 

分 类 号：TM744[电气工程—电力系统及自动化]