Optimal Placement of PMU using Improved Tabu Search for Complete Observability and Out of Step Prediction

A.M. El-Zonkoly, S. El-Safty, and R. Maher (Egypt)


Optimal placement of Phasor measurement units, Observability, Improved Tabu Search (ITS), Predictive Out-of-step Protection


This paper proposes an optimization method for optimal placement of phasor measurement units (PMUs) for complete observability of power system. The proposed method is based on numerical observability and artificial intelligence. The artificial intelligence algorithm used is the Improved Tabu Search (ITS) algorithm. The ITS is used to find the optimal placement for the PMU to keep the system complete observable. In addition, the paper describes a predictive Out-Of-Step (OOS) algorithm based on the observation of the voltage phase difference between substations. The proposed optimal placement of PMUs and the OOS algorithms are tested using the IEEE 6 bus, IEEE 14 bus systems and the Egyptian 500 kV network. The test systems are simulated using the PSCAD software program. The placement algorithm and the OOS prediction algorithm are carried out using MATLAB script programs.

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