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This paper presents a comparison between Phasor Measurement Units' (PMUs') optimal allocation for system topological observability, and PMUs' optimal number and locations for minimum state estimation residual error. A newly developed technique based on Discrete Particle Swarm Optimization (DPSO) is used in finding the PMUs' optimal allocation for different system unobservability depth. For the optimal allocation of PMUs from the point of view of minimum state estimation residual error, a new methodology is used with a new hybrid state estimation technique. The comparison is applied to a large system depicted from Unified Electrical Power Network (UEPN) of Egypt. The simulation results are discussed in details. |
