State Estimation of Power Network Using Phasor Measurement

The method of finding the voltage magnitude and angle of all buses based on measurement done on some buses is known as power system state estimation. Previously, we are too able to calculate the magnitude of bus voltages only. But nowadays, by using a phasor measurement unit, we can calculate the voltage and angle of the bus by placing a PMU in that bus. One of the advantages of PMU is in the area of state estimation. In this paper, we use PMU measurement in finding the state estimator of the IEEE 14 and 57 bus system using MATLAB programming. This method uses weighted least square (WLS) for calculating state estimator and post-processing approach for calculating PMU voltage and angle. By using conventional measurement, the method firstly calculates the state in polar form by WLS and then the final state is calculated with the help of PMU measurement.