The phasor measurement technology based on gps is introduced briefly . and how to add these phasor measurements into state estimation is analysed from several aspects . the state estimation differences between based on phasor measurements and conventional scada are given 简要介绍了基于gps的相角测量技术，从几个方面分析了如何将pmu测得的相角量测量加入到状态估计中，并比较了加入相角量测量后的状态估计与传统状态估计的不同。
