电测与仪表2017，Vol.54Issue(16)：1-6,6.
同步相量测量不确定度估计
Uncertainty estimation of synchrophasor measurements
汪芙平 1史坤鹏 2郭雷 2王春华 2姜旭 2赵伟1
作者信息
- 1. 电力系统及发电设备控制和仿真国家重点实验室(清华大学),北京100084
- 2. 国网吉林省电力有限公司,长春 130021
- 折叠
摘要
Abstract
The uncertainty estimation of synchrophasor measurements processes many valuable potential applications, such as detecting bad measurement data, monitoring the status of PMU setup, and providing measurement accuracy information for PMU applications.In this paper, we propose an uncertainty estimation method based on the synchronous sampled data and the synchrophasor measurements.The fundamental wave is reconstructed with the synchrophasor measurements, and the residual signal is computed as the difference between the synchronous sampled data and the reconstructed fundamental wave.Two variables, i.e.ρi and ρo, are calculated respectively representing the power ratios of the components of the residual signal inside and outside of fundamental frequency band to the reconstructed fundamental.Theoretical analysis has proven that with reasonable selection of fundamental frequency band, ρi is an approximately unbiased estimate of the measurement uncertainty, and-20lg(ρo) is an accurate estimate of signal to noise ratio of the sampled grid signal in decibel.Experiments with simulated data and PMU recorded data have verified the effectiveness and practical capacities of the algorithm.关键词
测量不确定度/同步相量测量/信号重构/PMUKey words
measurement uncertainty/synchrophasor measurement/signal reconstruction/PMU分类
信息技术与安全科学引用本文复制引用
汪芙平,史坤鹏,郭雷,王春华,姜旭,赵伟..同步相量测量不确定度估计[J].电测与仪表,2017,54(16):1-6,6.
