Hybrid State Estimation for Diverse Combination of PMU Measurements

Abstract

Continuous estimation of system states is mandatory for proper operation, control and protection of power system. This paper presents an observation of state estimation improvements for IEEE 14 bus system incorporating the Phasor Measurement Unit (PMU) measurements with traditional SCADA measurements. Initially, the optimal number of PMU requirement for complete observability of this test case is identified using the Integer Linear Programming (ILP) optimization technique. Then, the diverse combinations of the PMU requirement are checked. Incorporation of PMU measurements with traditional measurements for finally selected 4 cases are done. Eventually, the improvement of state estimation is observed for those cases by a graphical representation.