Y. M. WANG, H. XIAO 298

On the basis of analyzing the influence of th e ambient

conditions on the performance of GTCC units, tempera-

ture correction factor is used to improve the economic

dispatch model.

The optimization results by QGA are compared with

those by equal micro incremental method. Almost all the

results obtained by QGA in the simulations are better

than other methods used in the literature. With QGA

method the gas consumptions are significantly reduced.

The searching processes show that QGA has good char-

acteristics of globally optimization, fast convergent speed

robustness for initial values and so on.

The comparison of dispatch models for GTCC units

considering and not considering the influence of ambient

conditions indicates that it is so necessary to adopt vari-

able constraints for the dispatch model of GTCC units.

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