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access icon free Optimal PMU placement for power system observability considering network expansion and N − 1 contingencies

© The Institution of Engineering and Technology
Received 21/11/2017, Accepted 19/07/2018, Revised 12/06/2018, Published 13/08/2018

The determination of the appropriate number and location of the phasor measurement units (PMUs) has raised the issue of the system monitoring as the main challenge. In this study, the problem of optimal PMU placement (OPMUP) is carried out in order to achieve a fully observable power system under normal and contingency conditions considering network expansion.‏ For this purpose, network expansion is investigated considering two fixed and flexible PMU placement scenarios. The contingency index is introduced through the modelling process of N − 1 contingency states. This index is inserted as a new term in the objective function by compromising the observability confidence level and the number of PMUs. Other goals including minimising the number of PMUs, measurement channels and redundancy are considered along with the OPMUP process. The IEEE 57-bus standard network in the MATLAB is studied during the expansion time horizon with the proposed algorithms to achieve the above goals.

Inspec keywords: phasor measurement

Other keywords: contingency index; optimal PMU placement; normal condition; flexible PMU placement scenario; phasor measurement units; expansion time horizon; optimal PMU placement problem; IEEE 57-bus standard network; modelling process; contingency condition; N − 1 contingency states; MATLAB; power system observability; network expansion; measurement channels; OPMUP; fixed PMU placement scenario; system monitoring

Subjects: Power system measurement and metering

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