基于超临界二氧化碳循环的“光火储”一体化发电系统调峰性能研究  

Peak regulation performance of“photothermal storage”integrated power generation system based on supercritical carbon dioxide cycle

作　　者：田松峰[1,2] 徐琛 张倩 姚静[1,2] 刘旭 翟启超 TIAN Songfeng;XU Chen;ZHANG Qian;YAO Jing;LIU Xu;ZHAI Qichao(Department of Power Engineering,North China Electric Power University,Baoding 071003,China;Key Laboratory of Low-carbon and Efficient Power Generation Technology of Hebei Province,Baoding 071003,China)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]河北省低碳高效发电技术重点实验室,河北保定071003

出　　处：《热力发电》2025年第2期9-20,共12页Thermal Power Generation

摘　　要：为建设大容量灵活性调节电源,并解决燃煤机组冬季调峰供暖两难兼顾的问题,在传统火电(CFPP)基础上,利用太阳能和熔盐储热提出了6种兼顾冬季供暖的新型“光火储”一体化发电系统。通过EBSLION软件对该系统进行建模,从储热负荷和用电负荷2个角度对各方案的热力性能、调峰性能等方面进行了比较分析。采用“抽汽+电加热”储热方案显著提升了火电机组的调峰能力;在各方案中,方案W1展现出最大的调峰深度为92.71%;而方案W6则表现出最低综合度电煤耗仅为178.15 g/(k W·h),日节约标准煤量可达182 t;此外,方案W2最高循环热效率达到55.2%;用“光煤”共储的方案充分提升了超临界二氧化碳(S-CO_(2))系统备用容量,“抽汽储热”后驱动“小透平”辅助S-CO_(2)系统后供暖,实现了冬季调峰供暖的双重目标。此类系统不仅拓宽了燃煤机组调峰能力,保障了民生供暖,同时充分利用太阳能资源,降低度电煤耗,并提升S-CO_(2)系统备用容量及发电小时数,为大容量灵活性调节电源建设提供了理论和工程指导。In order to build a large capacity flexible power supply and solve the dilemma of balancing winter peak shaving and heating for coal-fired units,six new“solar thermal storage”integrated power generation systems are proposed based on conventional thermal power plants(CFPP),utilizing solar energy and molten salt thermal storage to balance winter heating.The system is modeled using EBSLION software,and a comparative analysis is conducted on thermal performance and peak shaving performance of each scheme from the perspectives of thermal storage load and electricity load.The use of a“steam extraction+electric heating”thermal storage scheme significantly improves the peak shaving capability of thermal power units.Among the various schemes,Scheme W1 exhibits the maximum peak shaving depth of 92.71%,Scheme W6 shows a minimum comprehensive coal consumption of only 178.15 g/(kW·h),with a daily saving of 182 tons of standard coal.In addition,Scheme W2 achieves the highest cycle thermal efficiency of 55.2%.The use of the“light coal”storage scheme fully enhances the backup capacity of the supercritical carbon dioxide(S-CO_(2))system,and the“extraction steam storage heat”drives the“small turbine”to assist the S-CO_(2) system in heating,achieving the dual goal of peak shaving heating in winter.This type of system not only expands the peak shaving capacity of coal-fired units,ensuring heating for people’s livelihoods,but also fully utilizes solar energy resources,reduces coal consumption per kilowatt hour,and enhances the reserve capacity and power generation hours of S-CO_(2) systems,providing theoretical and engineering guidance for the construction of high-capacity flexible regulation power sources.

关 键 词：光煤互补发电 熔盐储热 调峰深度 调峰容量 系统效率 

分 类 号：TM61[电气工程—电力系统及自动化]