燃煤电厂电煤能价比指标及其应用OA

[Objectives]Over the past 30 years,the conflict between electricity and coal prices has persisted in China.To straighten out the relationship between coal and electricity prices and to promote the comprehensive,coordinated,and sustainable development of the coal and power industries,it is necessary to establish evaluation indicators and price adjustment formulas for quickly assessing the rationality of electricity and coal prices for coal-fired power plants,so as to provide a new set of indicators for economic decision-making analysis for coal-fired power plants.[Methods]First,the energy value analysis method is applied to investigate and analyze the physical process of converting coal energy into electric energy in coal-fired power plants.Then,the intrinsic relationship between coal and electricity prices is derived through mathematical deduction.Finally,the calculation formulas for indicators such as the coal-to-electricity energy price ratio and for the coal-electricity price linkage are derived.[Results]Indicators such as the critical coal price,critical coal-to-electricity energy price ratio,reasonable coal-to-electricity energy price ratio,reasonable on-grid electricity price,and reasonable coal price are proposed.The reasonable coal-to-electricity energy price ratio for different units ranging from 300 to 1 000 MW is calculated to be 3.68-4.17.[Conclusions]The coal-to-electricity energy price ratio and related indicators provide a new method for power plants and relevant government departments to evaluate the rationality of electricity and coal prices.They can provide a scientific basis for government departments to formulate reasonable on-grid electricity prices,for coal-fired power plants to develop scientific operational strategies,and for plants to set bidding prices.