基于PMU实测数据的输电线路参数在线估计方法  

Online Estimation of Transmission Line Parameters Based on PMU Measurements

作　　者：王茂海[1] 鲍捷[1] 齐霞[2] 张哲[1] 

机构地区：[1]华北电力调度通信中心,北京市100053 [2]北京送变电公司,北京市102401

出　　处：《电力系统自动化》2010年第1期25-27,31,共4页Automation of Electric Power Systems

摘　　要：准确的电网参数是形成准确的电网模型,进而进行状态估计、潮流计算、网损分析、故障分析和继电保护整定计算等电力系统计算的基础。文中基于均匀传输线方程和Π形精确等值电路,给出了在两端电压相量和电流相量已知的情况下,输电线路分布参数和精确等值参数的计算方法。基于相量测量单元(PMU)实测数据和正态分布的参数估计理论,给出了输电线路参数的在线估计方法。基于华北电网广域测量系统(WAMS)的算例表明,所提出的方法准确可靠。Accurate power system parameters are the foundation to form a reliable power system model, which is essential for state estimation, power flow and contingency analysis, network losses analysis, stability analysis and protective relay setting calculation. Based on uniform transmission line equations and Ⅱ-type equivalent circuit equations, and on the assumption that voltage phasors and current phasors at both ends of a transmission line are known, the methods to calculate transmission line distributed parameters and accurate Ⅱ-type equivalent circuit parameters are given. Based on phasor measurement unit （PMU） measurements and statistical theory of normal distribution, an algorithm for on-line estimation of transmission line parameters is presented. Examples based on wide area measurement system （WAMS） in North China Power Grid show that the proposed methods are accurate and reliable.

关 键 词：广域测量系统 相量测量单元 输电线路 参数估计 

分 类 号：TM744[电气工程—电力系统及自动化]