Economic dispatch with environmental considerations: tradeoff curves and emission reduction rates

摘要

With the increase in the environmental awareness and the passage of environmental regulations, the environmental constraints are having a significant impact on the operation of power systems. Traditional economic dispatch to minimize the fuel cost is inadequate when environmental emissions are also to be included in the operation of power plants. This paper presents a method to include the fuel cost and the environmental impacts of emission in the optimization process. Since minimizing the fuel cost and emissions are conflicting in nature, a multiobjective optimization method is being used to develop tradeoff curves for different types of emissions. The incremental cost of a unit emission reduction (emission reduction rate) is defined. Emission reduction rates are calculated for all non-inferior points on a tradeoff curve. These rates provide important information to the system dispatcher to run the system according to his/her preferences. Furthermore, emission reduction rates for a particular pollutant can be used for emissions allowance trading.