摘要
同步相量测量单元(PMU)的量测性能,特别是动态条件下的量测精度,是其能否更好地服务于电力系统动态过程监测、分析与控制应用的基础。在简述PMU离散傅里叶变换(DFT)算法的基础上,重点利用相量因子的概念,分析了相量算法的动态特性,揭示了其在计算动态相量时出现的平均化效应;进一步给出了即使在相量计算平均化效应的情况下,通过改变时标位置减小动态相量计算误差的理论分析。文中采用实际PMU实验数据验证了上述理论分析的正确性。此外,为了能够系统、客观地评价PMU的动态性能,设计了PMU静、动态自动测试系统,可为PMU动态性能评估提供支撑。
The measuring performance of the phasor measurement unit（PMU）,especially under the dynamic condition,is the basis of deciding whether it can serve the power system dynamic monitoring,analysis and control.Based on abrief description of discrete fourier transform（DFT）,the dynamic performance is analyzed and the averaging effect of DFT is revealed via the proposed phasor factor.Then,it is pointed out that,even in the phasor calculation averaging effect case,it is possible to reduce the dynamic measuring errors caused by the DFT averaging effect by changing the time tag position.The PMU experimental data are used to testify the theoretical analysis.Furthermore,in order to systematically and objectively evaluate the dynamic performance of the PMU,a PMU dynamic automation test system is designed in support of the PMU dynamic performance evaluation.
出处
《电力系统自动化》
EI
CSCD
北大核心
2014年第1期62-67,共6页
Automation of Electric Power Systems
基金
国家重点基础研究发展计划(973计划)资助项目(2012CB215206)
国家自然科学基金资助项目(50920105705,51222703)
高等学校学科创新引智计划(“111”计划)资助项目(B08013)~~
关键词
同步相量测量单元
离散傅里叶变换
平均化效应
时标
动态性能评估
电力系统
phasor measurement unit（PMU）
discrete Fourier transform（DFT）
averaging effect
time tag
dynamic performance evaluation
power systems
