熔盐储热辅助低压缸零出力机组深度调峰的应用分析

张婉滢; 金晶; 解小军; 高新勇; 兰俊杰; 梁国威

doi:10.19912/j.0254-0096.tynxb.2023-1504

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (1) : 279-287. DOI: 10.19912/j.0254-0096.tynxb.2023-1504

熔盐储热辅助低压缸零出力机组深度调峰的应用分析

张婉滢¹, 金晶¹, 解小军², 高新勇³, 兰俊杰², 梁国威¹

作者信息 +

APPLICATION ANALYSIS OF DEEP PEAK SHAVING OF LOW-PRESSURE CYLINDER ZERO-OUTPUT UNIT ASSISTED BY MOLTEN SALT HEAT STORAGE

Zhang Wanying¹, Jin Jing¹, Xie Xiaojun², Gao Xinyong³, Lan Junjie², Liang Guowei¹

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文章历史 +

摘要

建立电力现货市场下熔盐储热辅助低压缸零出力机组深度调峰的容量优化模型及其可行性评价模型,并以山西省某实施低压缸零出力改造的350 MW热电机组为例进行计算分析。结果显示：该机组配置熔盐储热装置的最优容量为471.16 MWh,静态投资回收期为2.3 a。配置储热装置导致机组售电收入降低,但煤耗成本降低,调峰收入增长,净收益相比未配置熔盐储热增加3167.16万元。配置熔盐储热后机组的运行灵活性显著提高,处于电力现货市场第一档和第二档的调峰时长均增加,总调峰时长占比从配置熔盐储热前的56.4%增至85.6%。此外,煤炭价格的增加和供热面积的增加对改造项目的净收入和投资回收期是不利的。

Abstract

A capacity optimization model and feasibility evaluation model are established to assess the deep peak shaving of low-pressure cylinder zero-output units with molten salt thermal storage in the electricity spot market. The analysis is conducted using a 350 MW thermal power unit in Shanxi Province, which undergoes a zero-output modification in the low-pressure cylinder. The results show that the optimal capacity for the unit to be equipped with a molten salt thermal storage system is 471.16 MWh, with a static investment payback period of 2.3 years. The installation of the thermal storage system reduces the unit's electricity sales revenue but lowers coal consumption costs and increases peak shaving revenue, leading to a net profit increase of 31.67 million yuan compared to the non-configured molten salt thermal storage option. With the configuration of molten salt thermal storage, the operational flexibility of the unit significantly improves. The duration of peak shaving in the first and second price tiers of the electricity spot market increases, with the overall peak shaving duration rising from 56.4% to 85.6%. Additionally, an increase in coal prices and heating area negatively impacts the net profit and investment payback period of the transformation project.

导出引用

张婉滢, 金晶, 解小军, 高新勇, 兰俊杰, 梁国威. 熔盐储热辅助低压缸零出力机组深度调峰的应用分析[J]. 太阳能学报. 2025, 46(1): 279-287 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1504

Zhang Wanying, Jin Jing, Xie Xiaojun, Gao Xinyong, Lan Junjie, Liang Guowei. APPLICATION ANALYSIS OF DEEP PEAK SHAVING OF LOW-PRESSURE CYLINDER ZERO-OUTPUT UNIT ASSISTED BY MOLTEN SALT HEAT STORAGE[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 279-287 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1504

中图分类号： TM621

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