A new state estimation using synchronized phasor measurements

The most commonly used WLS state estimator in power industry is non-linear and formulated by using conventional measurements such as line flow and injection measurements. The computational burden becomes a concern for the existing WLS state estimation when integrating PMU measurements. Distributed state estimators, which can solve this problem of integrating, have been proposed for this reason. However, the discrepancy between distributed state estimator and the integrated state estimator exists. This paper proposes an approach to formulate the state estimation in a new manner that is able to formulate together the traditional measurements as well as PMU measurements easily and efficiently. The proposed estimator is tested on IEEE 118-bus system and ERCOT 5514- bus system.