电力科技与环保2026，Vol.42Issue(4)：554-561,8.DOI:10.19944/j.eptep.1674-8069.2026.04.004
超/亚临界机组深度调峰工况经济指标对比研究
Comparative study on economic indicators of deep peaking operation for super/subcritical units
摘要
Abstract
[Objective]In order to further enhance the peak-shaving capability of coal-fired power units,so as to meet the peak-regulation demands of the power system and achieve optimization of economic indicators.[Methods]This paper selects eight types of units,namely 600 MW and 300 MW,with supercritical wet cooling,supercritical air cooling,subcritical wet cooling,and subcritical air cooling as research objects.The influence of load rate on heat consumption rate and comprehensive plant electricity consumption rate areanalyzed,and the variation characteristics of coal consumption for power supply under different conditions such as load rate,power supply load,and load reduction process of different types of units are discussed.[Results]The research results indicate that the heat consumption rate and the comprehensive plant power consumption rate increase with the decrease of load rate.Except for supercritical air-cooled units and subcritical wet cooled units,which have a slightly higher coal consumption for 600 MW units than 300 MW units at a load rate of 100%,all four types of units show a lower coal consumption for 600 MW units than 300 MW units under other load rate conditions(e.g.,the average difference for supercritical wet cooling units is 7.55 g/(kW·h)).When the unit decreases from full load to a load rate of 50%,the coal consumption for power supply shows a relatively gentle upward trend(e.g.,the growth rate for supercritical wet cooling units is about 7.00%).When the unit decreases from a load rate of 50%to a load rate of 30%,the coal consumption for power supply shows a more severe upward trend(e.g.,the growth rate for supercritical wet cooling units is about 19.76%).Supercritical wet cooling units have better energy-saving benefits during deep peak shaving processes.For supercritical wet cooling units,if the unit operates for less than 300 MW for a long time,the energy-saving advantage of 300 MW units is better than that of 600 MW units;if the unit needs to frequently reduce load operation from full load state,the regulating energy advantage of a 600 MW unit is better than that of a 300 MW unit(e.g.,when reducing 200 MW from full load,the average coal consumption growth rate for 600 MW units is 3.11%,significantly lower than the 19.45%for 300 MW units).[Conclusion]This study can provide guidance for the development of more reasonable scheduling strategies for coal-fired power units,reduce energy consumption and emissions during peak shaving,and achieve energy conservation and consumption reduction in unit operation.关键词
深度调峰/热耗率/综合厂用电率/供电煤耗Key words
depth peaking/heat consumption rate/comprehensive plant electricity consumption rate/coal consumption of power supply分类
能源科技引用本文复制引用
乔梁,徐振,柏源..超/亚临界机组深度调峰工况经济指标对比研究[J].电力科技与环保,2026,42(4):554-561,8.基金项目
国电环境保护研究院有限公司自立项目(HBHZ2025Y01) （HBHZ2025Y01）
