电力系统自动化2011，Vol.35Issue(13)：61-65,5.
基于相量测量单元实测数据的变压器参数在线估计方法
Online Estimation of Transformer Parameters Based on PMU Measurements
摘要
Abstract
Based on phasor measurement unit (PMU) measurements, an online algorithm is presented to calculate power transformer's winding reactances and transformation ratio. It is found that due to the random error of PMU measurements, the multi-period parameter calculation results comply with a normal distribution. Furthermore, based on the statistics theory of normal distribution, a robust parameter identification algorithm is proposed to give confidence interval and point estimation of transformer's parameters and transformation ratio. Considering that low voltage side of three-winding transformer is usually connected with reactive power compensation devices, the algorithm can precisely identify the tap changer position without low voltage side PMU measurements. Examples from a wide area measurement system (WAMS) in North China power grid show that the methods proposed is feasible and reliable.关键词
广域测量系统；相量测量装置；变压器；参数估计；正态分布Key words
wide area measurement system (WAMS) / phasor measurement unit (PMU) / transformer/ parameter estimation/ normal distribution引用本文复制引用
王茂海,齐霞,牛四清,韩福坤..基于相量测量单元实测数据的变压器参数在线估计方法[J].电力系统自动化,2011,35(13):61-65,5.基金项目
国家电网公司科技项目“基于同步相量测量的大电网复杂动态过程监测分析技术研究”. （）
