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Implementation of regulation as an ancillary service in Eskom and the use of Eskom Internal Web for this service

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2 Author(s)
Chown, G.A. ; Eskom, Pretoria, South Africa ; Coetzee, M.G.

This paper describes the implementation of regulation as a competitive ancillary service in Eskom. Eskom is presently forming a grid operator business, which is responsible for buying ancillary services and providing a reliable transmission network. The process of defining system performance criteria is described. The total costing of the regulation service to a single coal fired generator was done using EPRI cost calculations. The performance of an individual generator is calculated along the guidelines of NERC Policy 10, with no allowance for over-control. This performance criterion determines regulation performance and payment to the generator, Over 750 points are downloaded every 4 seconds from the energy management system. System performance and individual unit performance are calculated using standard packages. This information is then made available in near-real time on the Eskom Internal Web in graphic and tabular form. This allows each generator to continually see its actual performance

Published in:

Power Systems, IEEE Transactions on  (Volume:15 ,  Issue: 3 )