Transient stability control by means of under-frequency load shedding and a hybrid control scheme

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Authors

Le Roux, Paul Francois
Bansal, Ramesh C.

Journal Title

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Publisher

The Research Energy Centre of the University of Cape Town

Abstract

An electrical network constantly faces unforeseen events such as faults on lines, loss of load and loss of generation. Under-frequency load shedding and generator tripping are traditional methods used to stabilise a network when a transient fault occurs. These methods will prevent any network instability by shedding load or tripping the most critical gener-ator at a calculated time when required. By execut-ing these methods, the network can be stabilised in terms of balancing the generation and the load of a power system. A hybrid control scheme is proposed where the traditional methods are combined to re-duce the stress levels exerted on the network and to minimise the load to be shed.

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Keywords

Transient disturbances, Centre of inertia (COI)-referred frame index, Power system stability

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Citation

Le Roux, P.F. & Bansal, R.C. 2017, 'Transient stability control by means of under-frequency load shedding and a hybrid control scheme', Journal of Energy in Southern Africa, vol. 28, no. 4, pp. 41-53.