Abstract

Phasor Measurement Units (PMUs) are key elements in secure monitoring and control operations of the power network. Most existing algorithms consider the full power grid observability for the PMU placement problem with the objective of minimizing the cost assuming the availability of the resources. This paper presents a PMU placement approach to ensure maximum coverage of the power network for the case where the resources are limited and full observability is not achievable. Given the limited number of PMUs the model aims to find the best placement in order to reach the maximum coverage and if possible the full power system observability. The problem formulated as an integer linear programming (ILP) model and solved for optimality. The optimization model is solved for IEEE 14, 30, 57, 118 and 2383 standard test systems incorporating the zero-injection buses. The reliability of the power system has been evaluated for the placement results reaching full network observability. The results show that with sufficient resources in hand the developed maximum covering model is comparable to the existing algorithms for full power network observability.

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