考虑火电对空气质量影响的机组检修计划与电能分解方法

Generator Maintenance Scheduling and Electric Energy Decomposition Method Considering Influence of Thermal Power on Air Quality

火电厂排放的大气污染物对人居环境的影响与其时空分布特性有关。文中基于人居环境空气质量指数(AQI),通过对火电机组污染物排放和扩散特性的分析,建立了评估火电污染物对人居环境影响程度的指标——AQI影响系数。在检修期备用容量满足导则等要求的前提下,提出了一种根据影响系数排序结果确定机组检修计划的方法,以及一种考虑现有各月AQI分布的火电机组年度合同电能分解方法,在优化重点月份AQI分布的同时兼顾能耗指标考核要求。算例表明,所提出的方法简便有效,能够调控火电机组AQI贡献值的年度分布状况,并可缓解重点月份空气污染程度。

Thermal power plants will generate air pollutants,whose influence on the living environment is related to its time and space distribution characteristics.Based on the air quality index（AQI）of living environment,an index named AQI influence coefficient is introduced according to an analysis of the characteristics of generator pollutant emissions and diffusion.On the premise that the spare capacity during the maintenance period should meet the requirements of the guidelines,a method of determining the generator maintenance scheduling based on the ranking of AQI influence coefficient is proposed as is decomposition method of annual contract electric energy of thermal power generators by taking the existing monthly AQI distribution into account,which is able to optimize the AQI distribution of months with poor air quality while satisfying the assessment criteria for energy consumption.A numerical example shows that the proposed methods are simple and effective in optimizing the annual distribution of AQI contribution from thermal power while significantly reducing the air pollution in the months with poor air quality.