Modeling effects of system frequency variation in long-term stability studies

Journal Article · Wed May 01 04:00:00 EDT 1996 · IEEE Transactions on Power Systems

DOI:https://doi.org/10.1109/59.496161· OSTI ID:264252

Varma, R K; Mathur, R M ^[1]; Rogers, G J ^[2]; Kundur, P ^[3]

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1. Univ. of Western Ontario, London, Ontario (Canada). Dept. of Electrical Engineering
2. Cherry Scientific Software Inc., Colborne, Ontario (Canada)
3. Power Tech Labs. Inc., Surrey, British Columbia (Canada)

This paper describes a fundamental study into modeling the effects of frequency variation on network and shunt impedances in long term power system stability simulations. The focus is on extreme post-fault situations where significant generation-load mismatch causes wide excursions in system frequency. A novel application of singular perturbations is presented. This method is compared with the ``constant reactance`` technique, the ``variable reactance`` method in which the network reactances are varied with system frequency, and a method in which the network transients are fully simulated. Stability simulations for an interconnected two-area system employing the different modeling techniques show that a two time scale analysis using the singular perturbation method is a feasible technique for accurate prediction of long term post fault system behavior.

• OSTI ID: 264252
• Report Number(s): CONF-950727--
• Journal Information: IEEE Transactions on Power Systems, Journal Name: IEEE Transactions on Power Systems Journal Issue: 2 Vol. 11; ISSN 0885-8950; ISSN ITPSEG
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
COMPUTERIZED SIMULATION
FREQUENCY DEPENDENCE
INTERCONNECTED POWER SYSTEMS
STABILITY
VAR CONTROL SYSTEMS