Inclusion of PMU current phasor measurements in a power system state estimator

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Inclusion of PMU current phasor measurements in a power system state estimator

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Three different methods of inclusion of current measurements by phasor measurement units (PMUs) in a power system state estimator is investigated. A comprehensive formulation of the hybrid state estimator incorporating conventional, as well as PMU measurements, is presented for each of the three methods. The behaviour of the elements because of the current measurements in the measurement Jacobian matrix is examined for any possible ill-conditioning of the state estimator gain matrix. The performances of the state estimators are compared in terms of the convergence properties and the variance in the estimated states. The IEEE 14-bus and IEEE 300-bus systems are used as test beds for the study.

Inspec keywords: Jacobian matrices; electric current measurement; power system measurement; power system state estimation

Other keywords: IEEE 300-bus system; Jacobian matrix; IEEE 14-bus system; power system state estimator; PMU current phasor measurement units

Subjects: Power system measurement and metering; Algebra; Current measurement

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