负荷不确定性电网的电压稳定性评价方法  

Voltage Stability Assessment Method for Power System with Load Uncertainty

作　　者：熊宁[1] 程浩忠[1] 马则良[2] 朱忠烈[2] 王晓辉[2] 陆建忠[2] 

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 [2]华东电网有限公司,上海市200002

出　　处：《电力系统自动化》2008年第8期24-27,54,共5页Automation of Electric Power Systems

基　　金：高等学校优秀青年教师教学科研奖励计划资助项目(ZDXM03006)~~

摘　　要：提出一种基于负荷不确定性电网的电压稳定性评价方法。在电网各节点及总负荷水平不确定、只能给出一个区间范围的情况下,首先定义了一种电压稳定性评价模型,采用边界定值法进行求解,找出一组最恶劣的负荷分布,使其在满足负荷取值范围的约束下离崩溃曲面的负荷距离最短。所述方法考虑了各节点和系统总负荷水平的不确定性,为电网的电压稳定性评估提供了一种新思路。在IEEE14和IEEE57节点系统中验证了所述算法的快速性和有效性。A novel voltage stability assessment method considering load uncertainty is proposed. It is well known that bus load and total system load are uncertain, commonly only an interval range of load fluctuation can be assured, Firstly, a voltage stability assessment model is constructed, Then, a boundary fixing method is used to find out the worst set of load distributions, which is the closest to the collapse point within the fluctuation range of bus load and total load. The proposed method shed a new light on the voltage stability assessment of a power system with the load uncertainty. Finally, the computational speed and effectiveness of the proposed method is validated on IEEE 14-bus and IEEE 57-bus systems.

关 键 词：负荷不确定性 边界定值法 最邻近电压崩溃点 电压稳定性指标 

分 类 号：TM712[电气工程—电力系统及自动化]