| In recent years,China’s air pollution situation has been severe.Severe haze weather has frequently occurred in many parts of the country.Large-scale,long-term,high-concentration air pollution has caused serious damage to human health,ecological environment and traffic safety.In order to cope with the increasingly prominent atmospheric environmental problems and promote the harmonious and unified development of GDP and the environment,the ecological GDP accounting system is gradually implemented,and various provinces have established air quality improvement assessment and compensation mechanisms to encourage relevant units.Sulfur dioxide,nitrogen oxides,and dust produced by coal-fired power plants are one of the main physical sources of air pollution,which have a great impact on air quality.However,China’s current energy structure determines that the proportion of coal power will not decline rapidly.Under the objective situation that coal is still the main energy consumption,it is urgent to solve the environmental pollution problems caused by the operation of coal-fired power units.And it is of great significance to optimize and plan the operation of coal-fired power plants with the goal of ensuring the effective supply of energy and improving the quality of the atmospheric environment.Therefore,this article conducted the following research:The spatio-temporal characteristics of the diffusion of air pollutants from coal combustion are studied.Gaussian plume model and Gaussian puff model in the Gaussian diffusion model are analyzed,and the characteristics of the two models are compared.Combining with the operating characteristics of coal-fired power plants,the atmospheric diffusion model suitable for electricity production is proposed,and simulation methods are used to analyze in detail the temporal and spatial distribution characteristics of gas-borne pollutant diffusion.In view of the fact that there are generally multiple emission sources and multiple monitoring points in the electricity field,a source-load correlation matrix of pollutant diffusion is established,which simplifies the calculation of pollutant diffusion concentration.The optimization of coal-fired power plant group operation under the ecological GDP accounting system is studied.Based on the concept of ecological GDP,the calculation method of ecological GDP for coal-fired power plants is proposed,which quantifying the calculation method of the environmental tax payable for pollutant discharge of coal-fired power plants and the AQI compensation fund obtained by adjusting the power generation plan.Under the ecological GDP accounting system,the objective is to maximize the power generation benefits of coal-fired generators composed of four parts: electricity sales revenue,fuel cost,environmental tax and AQI compensation.Considering the related technical constraints of the operation of coal-fired power units,the optimization model of the operation of coal-fired power units based on the ecological GDP accounting system is established.Through the analysis of calculation examples,it is verified that the proposed model can improve the atmospheric environment while increasing the revenue of power generation.The location planning of coal-fired thermal power plant considering the influence of pollutant diffusion is studied.The evaluation index system of coal-fired thermal power plant site selection is proposed,which is evaluated from four aspects of economy,environmental protection,safety and sociality,and the compensation of air quality index is included in the environmental protection index to construct fine environmental protection cost.Then the planning model of coal-fired thermal power plant site selection considering the influence of pollutant diffusion is established.Furthermore,the differences between the planning results of the proposed model and the conventional site selection planning results are compared and analyzed,and the influence of the prevailing meteorological conditions on the location planning results is studied,which provides theoretical basis and method support for relevant departments to determine the optimal location of new thermal power plants. |
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