基于逐次优化的电力系统紧急切负荷算法  

Emergency load shedding algorithm for power systems based on successive optimization

作　　者：王刚[1,2] 张雪敏[1] 梅生伟[1] 谭伟[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]海军工程大学电力电子技术研究所,武汉430033

出　　处：《清华大学学报（自然科学版）》2009年第7期943-947,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(2004CB217902);国家自然科学基金资助项目(50525721;50595411)

摘　　要：为确保校正控制的安全性同时兼顾经济性,提出一种新的紧急切负荷算法。该算法由恢复潮流方程可解性算法和满足电压稳定裕度算法两部分组合而成。前者利用电压稳定域边界的切平面方程辨识电压弱节点集,进而将该集的节点负荷量作为优化变量,并综合考虑切负荷量最小、有利于系统暂态稳定性提高和计算速度快等三项目标,提出了逐次优化算法以恢复潮流方程的可解性;后者利用故障后电压稳定域边界的切平面方程,调整可控参数变量以达到最小电压稳定裕度的要求。IEEE-39节点和上海电力系统的算例证明了该算法的有效性。A two stage emergency load shedding algorithm was developed to ensure safe control along with economic operation. The first stage improves the solvability of the power flow equation while the second stage achieves the requested load margin for voltage stability. The voltage weak node set is identified using the tangential plane of the voltage stability boundary. A successive optimization algorithm improves solvability of the power flow equation, whose objective is to minimize the load shedding and improve transient stability with fast calculational speed using the load of the voltage weak node set as the optimization variables. The algorithm is validated by simulations of the IEEE-39 system and the Shanghai power grid.

关 键 词：电力系统 校正控制 紧急切负荷 电压稳定域 

分 类 号：TM712[电气工程—电力系统及自动化]