摘要
近年来,电力系统中电力电子设备的大规模应用使电气信号呈现出宽频带、高噪声、动态过程复杂等特征。同步相量测量单元（phasor measurement units,PMUs）是电力系统动态过程有效监测手段,如何在上述条件下实现准确、快速测量至关重要。该文提出一种自适应同步相量测量方法。该方法通过分析动态相量模型参数在系统典型静动态条件下的行为规律,提出相量行为识别方法。针对不同的相量行为,采用不同计算时间窗,在不影响动态响应速度的前提下,提高测量精度与抗谐波、噪声的能力。进一步揭示系统动态条件下相量模型参数与测量误差的线性关系,提出动态相量计算修正方法。提出的自适应相量测量方法已在实际PMU装置上实现。经实验室测试分析表明,该方法可在各种复杂条件下具有较好的测量精度与响应速度。
Recently, the increasing implementation of electronic devices makes power signals have wider spectrum, higher noise, and more complicated dynamics. As a power system dynamic monitoring device, the accurate and rapid measurement of phasor measurement units（PMUs） under new circumstance is fundamental. In this paper, an adaptive phasor measurement method was proposed. A phasor behavior identification method was studied by analyzing dynamic phasor model under different scenarios. The corresponding data windows were designed for different inputs. The linear relationship between the second-order coefficients of the Taylor expansion and the errors caused by discrete Fourier transform（DFT） averaging effect was explored. Then, the linear relationship was used to compensate the raw measurement errors under a dynamic condition. The proposed algorithm was implemented in a real PMU. The laboratory testing demonstrates that the proposed algorithm can track the power system precisely and quickly.
作者
刘灏
李珏
毕天姝
杨奇逊
LIU Hao;LI Jue;BI Tianshu;YANG Qixun(State Key Lab of Alternate Electric Power System With Renewable Energy Sources（North China Electric Power University）,Changping District,Beijing 102206,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2018年第17期5063-5071,共9页
Proceedings of the CSEE
基金
国家重点研发计划(2017YFB0902901)
国家自然科学基金项目(51627811,51707064)
国家电网科技项目(SGSXLF00FCJS 1700047)~~
关键词
同步相量测量单元
信号识别
自适应相量算法
电力系统
phasor measurement units （PMUs）
signalidentification
adaptive phasor measurements
power system
