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【目的】为进一步提高煤电机组调峰能力，以满足电力系统调峰需求，实现经济指标优化。【方法】本文选取超临界湿冷、超临界空冷、亚临界湿冷、亚临界空冷的600 MW级和300 MW级共8种类型机组为研究对象，分析了负荷率对热耗率、综合厂用电率的影响，探讨了负荷率、供电负荷、不同类型机组降负荷过程等不同条件下机组供电煤耗的变化特征。【结果】研究表明，机组热耗率和综合厂用电率随负荷率降低而升高。除超临界空冷机组和亚临界湿冷机组负荷率100%外，其他负荷率条件下4种类型机组均显示600 MW级机组供电煤耗小于300 MW级机组，超临界湿冷机组平均差值为7.55 g/（kW·h）。当机组从满负荷降至50%负荷时，供电煤耗随供电负荷减小呈缓和上升趋势，超临界湿冷机组供电煤耗增长率约7.00%；当机组负荷从50%降至30%时，供电煤耗呈剧烈上升趋势，如超临界湿冷机组供电煤耗增长率约19.76%。超临界湿冷机组在深度调峰过程节能效益较佳；若机组长时间低于300 MW运行，300 MW级机组节能优势优于600 MW级机组；若机组需频繁从满负荷向下调节负荷运行，600 MW级机组调节能优势优于300 MW级机组，均为满负荷降至200 MW时，600 MW级机组供电煤耗增长率平均为3.11%，远低于300 MW级机组的19.45%。【结论】本研究可为煤电机组制定更为合理的调度策略提供指导，降低机组在调峰过程中的能耗和排放，实现节能降耗。
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 coalfired power units, reduce energy consumption and emissions during peak shaving, and achieve energy conservation and consumption reduction in unit operation.
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基本信息:
DOI：10.19944/j.eptep.1674-8069.2026.04.004
中图分类号:TM621
引用信息:
[1]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(04):554-561.DOI:10.19944/j.eptep.1674-8069.2026.04.004.
基金信息:
国电环境保护研究院有限公司自立项目（HBHZ2025Y01）
2026-08-15
2026-08-15