PMU电压幅值与频率量测一致性的在线评估方法  

On-line Assessment on Voltage Consistency and Frequency Consistency of PMU Measurement Under Steady State

作　　者：毕天姝[1] 刘灏[1] 吴京涛[2] 杨奇逊[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京市102206 [2]北京四方继保自动化有限公司,北京市100085

出　　处：《电力系统自动化》2010年第21期21-26,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金重大国际合作项目(50920105705);国家自然科学基金资助项目(50607005);国家自然科学基金重点项目(50837002);高等学校学科创新引智计划("111"计划)资助项目(B08013);国家重点基础研究发展计划(973计划)资助项目(2009CB219704)~~

摘　　要：相量测量单元(PMU)的广泛应用,为实现电网的动态安全监控提供了数据基础,也是建设智能电网的重要技术内容。然而各厂家在实际运行环境中PMU产品的精度和相量量测的一致性并没有经过严格的检验。文中提出一种PMU电压幅值与频率量测一致性的在线评估方法,分别给出了电压一致性、频率一致性与电压—频率一致性指标及其计算方法。此外,还重点分析了可能造成电压幅值及频率量测一致性差异的原因,即系统偏离额定频率对PMU量测的影响,指出应对偏离额定频率情况下的计算相量进行修正,以进一步改善实测相量的质量。The extensive application of phasor measurement unit（PMU）provides a data platform for the smart transmission grid.However,the measurement accuracy and phase consistency of the commissioned PMUs in practical systems from different manufacturers are often not strictly tested.This paper presents an assessment method for on-line consistency assessment of synchronized phasors.Three performance indices are suggested,including voltage amplitude consistency index,frequency consistency index and voltage-frequency consistency index.The corresponding calculation methods are given as well.In addition,the behavior of PMU,when the system frequency deviates from the nominal value,is analyzed in detail.This clearly shows that phasor correction is needed under this condition in order to further improve the quality of the measured phasor.

关 键 词：相量测量单元(PMU) 相量一致性 在线评估 电力系统 

分 类 号：TM76[电气工程—电力系统及自动化]