Shifted-frequency analysis for EMTP simulation of power-system dynamics

Authors:
Peng Zhang;José R. Martí;Hermann W. Dommel
Affiliations:
University of Connecticut, Storrs, CT;The University of British Columbia, Vancouver, BC, Canada;The University of British Columbia, Vancouver, BC, Canada
Venue:
IEEE Transactions on Circuits and Systems Part I: Regular Papers - Special section on 2009 IEEE custom integrated circuits conference
Year:
2010

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Signals & systems (2nd ed.)

Signals & systems (2nd ed.)
Equivalency of continuation and optimization methods to determine saddle-node and limit-induced bifurcations in power systems

IEEE Transactions on Circuits and Systems Part I: Regular Papers

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Abstract

Traditional power-system dynamic simulation tools make a number of simplifying assumptions to speed up computations; thus, they can only capture snapshots of the system operation, ignoring the dynamics between states. This paper applies the shifted-frequency-analysis (SFA) theory to the Electromagnetic Transients Program (EMTP) simulator in order to efficiently obtain the time-domain simulation results in the neighborhood of the fundamental frequency without making quasi-steady-state or other simplifying assumptions. The SFA-based EMTP simulator can provide dynamic-phasor results that accurately trace the evolution of the system state in three-phase power systems. Dynamic phasors provide envelopes of the time-domain waveforms and can be accurately transformed back to instantaneous time values. Test cases have verified the usefulness of the SFA-based dynamic simulation method.