针对太阳能间歇性导致光煤互补热电联产机组在不同时段机组调峰容量相差较大问题,以某电厂300 MW热电联产机组为研究对象,利用Ebsilon Professional软件搭建耦合储热光煤互补热电联产机组,基于典型日实际气象数据,讨论储热系统对光煤互补热电联产机组调峰性能的影响。结果表明,耦合储热后光煤互补热电联产机组运行更稳定,调峰容量只受到储热罐与导热油温差影响产生小幅波动,同时机组调峰容量得到了显著的提高,供热功率越大调峰容量提高越明显。在火电机组最小运行方式下,太阳能辐射功率最大时耦合储热后光煤互补热电联产机组调峰容量提高37.87%,夜间耦合储热后光煤互补热电联产机组调峰容量提高140.62%；耦合储热后光煤互补热电联产机组在额定供热功率下15:30、00:00调峰容量分别提升9.54%、29.42%。在机组最小运行方式下15:30、00:00调峰容量分别提升43.02%、147.71%；耦合储热机组调峰补偿收益更明显,无储热机组由于集热器热损失的影响夜间调峰补偿收益略低于原始热电联产机组。

To address the issue of significant fluctuations in the peak shaving capacity of solar-coal complementary cogeneration units caused by the intermittency of solar energy at different times, this study focuses on a 300 MW cogeneration unit from a certain power plant. Using Ebsilon Professional software, a coupled thermal storage solar-coal complementary cogeneration unit is constructed. Based on actual meteorological data from a typical day, the study discusses the impact of the thermal storage system on the peak shaving performance of the solar-coal complementary cogeneration unit.The results indicate that after coupling thermal storage, the operation of the solar-coal complementary cogeneration unit is more stable, with the peak shaving capacity experiencing only minor fluctuations influenced by the temperature difference between the thermal storage tank and the heat transfer oil. Additionally, the peak shaving capacity of the unit has significantly improved, becoming more pronounced with greater heating power.Under the minimum operating mode of the thermal power unit, when solar radiation power is at its highest, the peak shaving capacity of the coupled thermal storage solar-coal complementary cogeneration unit increases by 37.87%. At night, the peak shaving capacity increases by 140.62% after coupling thermal storage. Under rated heating power, at 15:30 and 00:00, the peak shaving capacity improves by 9.54% and 29.42%, respectively. In the unit"s minimum operating mode, at 15:30 and 00:00, the peak shaving capacity rises by 43.02% and 147.71%, respectively. The peak shaving benefits of the coupled thermal storage unit are more pronounced, while the unit without thermal storage shows slightly lower peak shaving benefits at night due to heat losses from the collector compared to the original coal-fired cogeneration unit.

国家自然科学基金资助项目（51966016）；内蒙古自然科学基金资助项目（2022MS05036）