State estimation of radial distribution network using a PMU and sample shifting technique

Abstract

The main objective of this paper is to estimate the states (i.e. voltage magnitude and angle δ) of the buses in a radial distribution network with the help of a Phasor Measurement Unit (PMU) placed at the sending end (SE). The remote bus parameters are estimated using the samples of voltage and current signals only of the local bus end where a PMU is placed. The estimated parameters are verified with the standard load flow techniques. The verification of results proves its utilization for online load flow analysis and the reduction of the number of PMUs to one. Hence the requirement of multiple PMUs at the different buses and their associated communication systems is no longer required.