Abstract

The role of economic load dispatch is increasing in the future power system, making best use of the ramp rate capability of thermal generating units to follow rapid and large disturbances due to the large amount of renewable energy penetration. This paper proposes a dynamic economic load dispatch method using the generator's feasible operation region approach. It is a region within which generating units may change their outputs in order to match a demand profile while satisfying ramp-rate and supply-demand balance constraint. The method can specify the amount of reserve required to maintain a feasible operation for restrictive demand profile which cannot be served due to generating unit's capability. The proposed method has been successfully tested on a 3 generator system supplying a typical afternoon demand profile.

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