Abstract
In order to reduce the pollution caused by coal-fired generating units during the heating season, and promote the wind power accommodation, an electrical and thermal system dispatch model based on combined heat and power (CHP) with thermal energy storage (TES) and demand response (DR) is proposed. In this model, the emission cost of CO2, SO2, NOx, and the operation cost of desulfurization and denitrification units is considered as environmental cost, which will increase the proportion of the fuel cost in an economic dispatch model. Meanwhile, the fuel cost of generating units, the operation cost and investment cost of thermal energy storage and electrical energy storage, the incentive cost of DR, and the cost of wind curtailment are comprehensively considered in this dispatch model. Then, on the promise of satisfying the load demand, taking the minimum total cost as an objective function, the power of each unit is optimized by a genetic algorithm. Compared with the traditional dispatch model, in which the environmental cost is not considered, the numerical results show that the daily average emissions CO2, SO2, NOx, are decreased by 14,354.35 kg, 55.5 kg, and 47.15 kg, respectively, and the wind power accommodation is increased by an average of 6.56% in a week.
Highlights
IntroductionClean energy is promoted all over the world to reduce environmental pollution
In recent years, clean energy is promoted all over the world to reduce environmental pollution. China is rich in wind energy resources, the main operation pattern “determining power by heat” for combined heat and power (CHP) and the “anti-peak regulation” character of wind power in heating season causes severe wind curtailment [1,2]
The results show that the daily average emissions of CO2, SO2, and NOx are decreased by 14,354.35 kg, 2.1
Summary
Clean energy is promoted all over the world to reduce environmental pollution. In Reference [12], in order to coordinate the operation of the electric power system and the district heating system, a dispatch model including CHP and TES was proposed In this dispatch model, the temperature dynamics of the district heating network were considered as energy storage to manage the variability of wind energy. For the research of the above references, there were few studies concretely considering the environmental cost for electric and thermal system dispatch model, or ignoring the advantages of DR, which could effectively reduce the pressure of generating units. In this paper, aiming at reducing the emissions of CO2 , SO2 , and NOx , and promoting the wind power accommodation, an electrical and thermal system dispatch model considering environmental cost based on CHP-DR is proposed. Two dispatch models are set and the data in one week is utilized to verify the effectiveness
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