电力系统常用动态等值方法的比较与改进  

Comparison and Improvement of Common Methods of Dynamic Equivalence in Power System

作　　者：刘丽霞[1] 罗敏[2] 李晓辉[1] 刘树勇[1] 艾芊[2] 王西田[2] 岑海凤[2] 

机构地区：[1]天津市电力公司技术中心,天津300022 [2]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电力系统及其自动化学报》2011年第1期149-154,共6页Proceedings of the CSU-EPSA

基　　金：电力系统国家重点实验室资助项目(SKLD09KZ07)

摘　　要：为提高EMS的精度和实用性,对动态等值方法进行详细研究。该文主要对同调等值法和估计等值法的优缺点、发展的现状和前景进行了比较,最后采用一种基于改进的免疫算法的估计等值法对实际大电网进行估计等值。通过与最小二乘法比较发现,基于改进的免疫算法的动态等值方法精度较高,效果良好,能够很好地满足工程应用的要求。In order to improve the accuracy and practicality of EMS,the dynamic equivalent methods was investigated in detail.In this paper,coherency method and evaluation method are investigated and compared in detail from the aspects of advantage,disadvantage,development status and development prospects.Finally,the evaluation method based on improved immune algorithm is applied in the engineering practice of real power system.Compared with the least square method,the dynamic equivalence method based on improved immune algorithm has higher precision and better effect,and can well meet the requirements of engineering applications.

关 键 词：电力系统 动态等值 同调等值法 估计等值法 免疫算法 

分 类 号：TM711[电气工程—电力系统及自动化]