State Estimation Along WLS-Phasor Measurements in Power System

Abstract

A procedure of approximating extent of state along with voltage angle built on measurements that have been agreed for every bus of system only at the buses is the Power System State Estimation. The power system state cannot be estimated only by using PMU measurements as PMUs are expensive. Along with the old measurement methods, to estimate the power system's state, phasor measurements are being used as additional measurement. A MATLAB program coded, PMU measurements described along with a simulation has been carried out on bus system's IEEE-30 and IEEE-14 for the technique's verification. A unique estimator model is used in the technique. The technique sets the estimate in current measurements, through post procession in the PMU voltage as well as for the state from the Weight Least Square (WLS) method. Using the measurements which are traditional, the estimation is done by the model in polar coordinates using WLS state estimation. The system's final state is estimated by expressing the PMU measurements along with the states in rectangular coordinates.