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Modelling and evaluation of interruptible-load programmes in electricity markets

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4 Author(s)
Yu, C.W. ; Dept. of Electr. Eng., Hong Kong Polytech. Univ., China ; Zhang, S. ; Chung, T.S. ; Wong, K.P.

Achieving higher system reliability using market-based approaches is a contemporary issue that has been attracting a great deal of attention in the emerging deregulated electricity-market structure. The paper presents a methodology for the modelling and evaluation of interruptible-load programmes to tackle this issue. The interruptible-load programme is formulated as an equivalent price-based generating resource with a random outage effect, and is thus incorporated in a probabilistic production simulation of a system. The interdependence between the electricity spot-market price and the equivalent generating-resource parameters is addressed and solved by an iterative co-ordinating algorithm. The proposed approach is capable of achieving comprehensive evaluations and systematic decision making for the interruptible load programme in electricity-market operation. A numerical-case-study example is presented to illustrate the validity of the method. The results reveal that interruptible-load programmes can serve effectively as a market-based tool to achieve a proper balance between generation-capacity reliability and economics in the ccompetitive electricit markets.

Published in:

Generation, Transmission and Distribution, IEE Proceedings-  (Volume:152 ,  Issue: 5 )