WSEAS Transactions on Power Systems
Print ISSN: 1790-5060, E-ISSN: 2224-350X
Volume 13, 2018
Extended Optimal PMU Placement Problem for Voltage Stability Assessment
Authors: ,
Abstract: This paper proposes extended formulations for the optimal Phasor Measurement Unit (PMU) placement problem in power systems with respect to voltage stability assessment for the cases of Zero Injection Buses (ZIBs), critical buses, and PMU redundancy. Modifications of the Binary Integer Programming (BIP) method to solve the proposed extended PMU placement problem are developed. The extension of the connectivity matrix and observability constraints are introduced on the basis of the analyses of the power system network, Modal Participation Factors (MPFs) from the Eigenvalues of the power flow Jacobian, and the introduction of redundancy for N-1 PMU outage for the observability of the critical buses. The performances of the modified method and algorithms were validated using the IEEE 14-bus, 30-bus, and 57-bus test networks. Furthermore, a comparison is made with previous results in the literature obtained using the BIP method. The simulation results show that the proposed method and algorithms provide a better framework for the strategic placement of PMUs in practical networks for monitoring the power system status and its margin to voltage collapse. In addition, the modified method and algorithms were shown to give fewer PMUs for redundancy against N-1 PMU outage when compared to the existing literature.
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Keywords: Critical bus, modal participation factor, optimal PMU placement, phasor measurement unit, synchrophasors, voltage stability assessment
Pages: 364-376
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1790-5060 / 2224-350X, Volume 13, 2018, Art. #36