Generation Dispatch Strategy under Environment Protection Consideration

Abstract

An optimal generation dispatch strategy method while considering CO2 emissions is presented in this paper. Firstly, different CO2 equivalent models for fuel generated thermal units are derived. Secondly, the Cost-CO2 emission Tradeoff Curve (CCTC) and Incremental Cost for CO2 Reduction (ICCR) curve, are introduced to assess the impact of CO2 emissions on power generation costs. Incorporating these two indexes, the single-objective and bi-objective programming methods are employed to establish a generation dispatch strategy. The salient feature of the strategy allows the decision-maker to consider both environmental and economic factors at the same time. Since generation dispatch belongs to large-scale non-linear planning problems, this study employs a particle swarm approach with novel coding scheme for generation dispatch solution, which can quickly find an optimal solution with higher probability. Finally, taking the 27-unit system from Taiwan power company as an example, simulation result of the study reveals that the proposed dispatch strategy can effectively take into consideration CO2 reduction impact on cost during off-peak, half-peak and peak load conditions to achieve environmental protection and economic purpose.