Study on variable working condition and economy of regenerative heat storage peak regulation scheme for condensing units

黄娅彤; 郑莆燕; 朱群志; 叶子杰

doi:10.19666/j.rlfd.202507078

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Study on variable working condition and economy of regenerative heat storage peak regulation scheme for condensing units

Thermal Power Generation Vol. 55, Issue 2, Pages: 128-138(2026)

更新时间：2026-08-07

- Study on variable working condition and economy of regenerative heat storage peak regulation scheme for condensing units
- 作者机构：
  
  上海电力大学能源与机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202507078
  CLC： TM621
- Published：2026
- 稿件说明：
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[1]黄娅彤,郑莆燕,朱群志,等.凝汽式机组旁路蓄热调峰方案变工况及经济性研究[J].热力发电,2026,55(02):128-138.
[1]黄娅彤,郑莆燕,朱群志,等.凝汽式机组旁路蓄热调峰方案变工况及经济性研究[J].热力发电,2026,55(02):128-138. DOI： 10.19666/j.rlfd.202507078.

DOI：10.19666/j.rlfd.202507078.

摘要

将熔盐储热技术应用于凝汽式火电机组可提高机组调峰的灵活性。构建了一种与旁路耦合的二级蓄热系统，并将其应用于某660 MW超超临界一次再热机组。以30%THA为蓄热设计工况，设计了4种蓄热容量方案，应用EBSILON软件模拟研究了变工况下机组的调峰范围、蓄放热时长、调峰成本和不同市场规则下蓄热调峰净利润的变化。结果表明：变工况运行时，存在蓄热可行域和放热可行域；蓄热过程中，蓄热起始工况在40%～50%之间最低发电负荷率下降的幅度较大，且高温蓄热系统先达到蓄热设计容量；放热过程中，放热起始工况为94.6%时即可达到VWO工况的负荷率，且高温蓄热系统先完成放热；不论何种方案，在45%蓄热起始工况下蓄热调峰时，售电收益增加最大，寿命损耗成本的增加最小，蓄热调峰增加的总成本最低；在调峰辅助服务市场下，净利润的最大值在40%蓄热起始工况下取得，而在容量市场下，净利润的最大值在45%蓄热起始工况下取得；蓄热容量最小的方案的总成本增加最低，在2种市场规则下的净利润均最大。

Abstract

Applying the molten salt heat storage technology to condensing thermal power units can enhance the flexibility of peak shaving. A bypass two-stage heat-storage peak shaving scheme was proposed and applied in an ultra-supercritical 660 MW unit. Taking 30% THA as the design condition for the thermal storage system

four heat storage capacity schemes were designed. The EBSILON software was used to analyze the peak regulation range

heat storage and release duration

peak regulation cost

and the change of net profit from heat-storage peak-shaving under different market rules. The results show that during off-design operations

there exist feasible domains for both heat charging and discharging. During the charging process

when the initial operating condition is between 40%～50%

the decrease in minimum generation load ratio is most significant

with the high-temperature thermal storage system reaching its design capacity first. During the discharging process

when the initial operating condition is 94.6%

the load ratio equivalent to VWO condition can be achieved

with the high-temperature thermal storage system completing discharge first. Regardless of the implementation approach

peak-shaving through thermal storage achieves maximum electricity revenue growth while minimizing lifespan depreciation costs and overall system expenses. In the peak-shaving ancillary service market

net profit peaks at 40% heat-storage starting condition

whereas in the capacity market scenario

the maximum net profit occurs at 45% heat-storage starting condition. The scheme with the smallest heat storage capacity demonstrates the lowest total cost increase

with both market mechanisms yielding optimal net profits.

关键词

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references

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