Abstract
Coal electricity is dominant in China, and power capacity of coal electricity is about over 70% of the total power generating capacity. UHV remote interregional power transmission could meet the power demand of receiving end area without generating atmospheric pollutants. Thus, the atmospheric environmental quality was improved in the receiving end area. For the quantitative evaluation on the environmental benefits of UHV power transmission project, the assessment methods of the emission reduction benefits for air pollutants was proposed in the study, and were based on the analysis for emission and transmission characteristics of each pollutant generated during thermal power. PM, SO2 and NOx are regional pollutants, and the emission reductions could be only calculated in the receiving end area; mercury is global pollutants, the emission reduction of elemental mercury (Hg0) could be only calculated for emission reduction benefits of total Hg, and the emission reduction is equal to the difference between the emissions of the receiving end and the sending end for UHV power transmission. Environmental benefits of Ximeng-Shandong 1000 kV UHV AC Transmission Project were calculated. For the project, the emissions of Shandong province could reduce 3156 t/a, 13413 t/a and 19331 t/a for PM, SO2 and NOx, respectively.
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