多运行方式下概率特征根灵敏度分析与PSS鲁棒设计  

Probabilistic eigenvalue sensitivity analysis and PSS design in multi-operating conditions

作　　者：边晓燕[1] 周歧斌[2] 王克文[3] 符杨[1] 

机构地区：[1]上海电力学院上海市电站自动化技术重点实验室,上海200090 [2]上海市防雷中心,上海201615 [3]郑州大学电气工程学院,河南郑州450002

出　　处：《电力系统保护与控制》2009年第19期77-83,87,共8页Power System Protection and Control

基　　金：上海市浦江科技人才计划(08PJ14060);上海市教委科研创新项目(09YZ341;08ZZ92);上海市优青基金项目(sdl08010)

摘　　要：采用概率法对电力系统稳定器(PSS)进行鲁棒设计,包括PSS定位与参数调节。本研究的目的是提高电力系统在多运行方式下的小干扰稳定。在多运行方式下,系统特征根将以一定的概率分布在某些区间内,正态假定下的均值、方差可用来描述这种分布特性。传统的特征根灵敏度分析方法扩展为概率特征根灵敏度分析,包括求解特征根均值和方差的灵敏度,建立概率灵敏度指标,用于对鲁棒的PSS进行选址和参数调节。并构建基于概率特征根的目标函数,采用拟牛顿法对PSS参数进行最优协调,在8机-24节点算例系统上验证所研究方法的有效性。This paper presents a probabilistic algorithm for robust Power System Stabilizer （PSS） design, and the system robustness can be guaranteed because the load variation has been taken into account in probabilistic representation. Conventional eigenvalue analysis is first extended to the probabilistic environment in which the statistical nature of eigenvalues, corresponding to the load duration curves, is described by their expectations and variances. A probabilistic sensitivity index is then derived and successfully applied to the location, feedback signal and parameter selection of PSSs. A probabilistic eigenvalue-based objective function for coordinated synthesis of PSS parameters is then proposed. The quasi-Newton technique of nonlinear programming is used to solve the objective function and its convergence properties are discussed. The effectiveness of the proposed stabilizers, with a classical lead/lag structure, is demonstrated on an 8-machine system.

关 键 词：概率特征根 概率特征根灵敏度 电力系统稳定器(PSS) 

分 类 号：TM712[电气工程—电力系统及自动化]