An algorithm for improving the power system state estimation using PMU measurements

摘要

State estimation provides the platform for advanced security monitoring applications in control centers. An algorithm based on pseudo-measurements and PMU measurements was developed and implemented in MATLAB environment. The novelty proposed by this paper consists in the methodology of computing the considered pseudo-measurements. For increasing the accuracy of the state estimator algorithm, adjustment of the network parameters with the ambient temperature is considered. Furthermore, different models of the electrical lines are applied. The tests and simulations were performed on the NORDIC32 test system. The purpose is to show that state estimation using phasor measurements may improve the actual estimations based on the SCADA measurements.