基于扩展仿射模型的不确定性静态电压稳定性全局灵敏度分析  

Global Sensitivity Analysis of Uncertain Static Voltage Stability Based on Extended Affine Model

作　　者：乐健[1] 廖小兵 李奔 周子恒 彭学林 Le Jian;Liao Xiaobing;Li Ben;Zhou Zhiheng;Peng Xuelin(School of Electrical Engineering and Automation Wuhan University,Wuhan 430072 China;State Grid Hubei Ezhou Power Supply Company, Ezhou 436000 China;State Grid Hubei Wuhan Power Supply Company,Wuhan 430000 China)

机构地区：[1]武汉大学电气与自动化学院,武汉430072 [2]国网鄂州供电公司,鄂州436000 [3]国网武汉供电公司,武汉430000

出　　处：《电工技术学报》2021年第13期2821-2831,共11页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2017YFB0903705)。

摘　　要：波动性可再生能源大规模并网成为电力系统新的重要不确定性因素,准确评估这种不确定性对电力系统静态电压稳定性的影响,有利于提高系统运行安全水平。计及可再生能源和负荷功率的不确定性,该文根据扩展仿射算术建立了基于L指标的静态电压稳定性区间评估模型,利用解析化方差分解的全局灵敏度指标辨识输入变量对静态电压稳定性影响的重要程度。多个IEEE算例的仿真结果表明,该文所提方法相比常用仿射算术能更有效地抑制区间扩张效应,同时基于解析化方差分解的全局灵敏度分析方法能快速、高效地辨识出影响静态电压稳定性的关键因素。The large-scale integration of volatile renewable energy into the grid has become new important uncertainty factors in power system,and accurate assessment of the impact of uncertainties on the static voltage stability of the power system is conducive to improving the safe and stable operation of system.Considering the uncertainties of renewable energy and load,this paper establishes the static voltage stability interval assessment model based on the L index using extended affine arithmetic,and uses the global sensitivity indices based on the analytical variance decomposition to identify the importance of the input variables that affect the static voltage stability.The simulation results of several IEEE examples show that the proposed method can suppress the interval expansion effect more effectively than the commonly used affine arithmetic,and the global sensitivity analysis method based on the analytical variance decomposition can quickly and efficiently identify the key factor that affects static voltage stability.

关 键 词：区间不确定性 全局灵敏度分析 静态电压稳定性 扩展仿射算术 方差分解 

分 类 号：TM711[电气工程—电力系统及自动化]