火-风-光多能互补系统中燃煤机组“三联改”适用性研究

Research on the Applicability of the“Three Types Modifications”of Coal-fired Units in the Thermal-wind-solar Multi-energy Complementary System

祝令凯，郑威，钟子威，王琮瑜，宋继伟

ZHU Lingkai，ZHENG Wei，ZHONG Ziwei，WANG Congyu，SONG Jiwei

1.国网山东省电力公司电力科学研究院，山东济南250003
2.山东大学热科学与工程研究中心，山东济南250061

摘要(Abstract)：

基于山东省能源结构的调整现实，在不同的可再生能源渗透率场景以及核电基荷运行场景下，研究火-风-光多能互补系统中燃煤机组“三联改”适用性。基于各类型热电联产机组热力学模型，求解“三联改”热电厂的热电负荷运行域，在两种场景下进行了火-风-光多能互补系统中电力不平衡度最小的热电联产机组优化调度。结果表明，与原始热电厂相比“，三联改”后的热电厂能提供更强的顶峰发电能力与可再生能源的消纳空间。火-风-光多能互补系统中热电联产机组的最优调度结果表明“，三联改”热电厂的累计电力不平衡量始终明显低于原始热电厂。能源系统内的基荷占比越大，越不利于燃煤机组平抑可再生能源的波动性。此外，对“三联改”热电厂在应对可再生能源波动性时的最优调度策略进行研究，研究结果表明，燃煤热电联产机组“三联改”可显著平抑可再生能源高渗透率带来的波动性，提升对可再生能源的消纳能力。针对各类型机组运行特性提出的调度策略，能为山东省能源系统转型过程中燃煤机组的灵活性改造选择及优化运行提供参考。Based on the reality of the energy structure adjustment in Shandong Province，the applicability of the " Three Types Modifications " of coal-fired cogeneration units in the thermal-wind-solar multi-energy complementary system is investigated under different renewable energy penetration scenarios and nuclear power base-load ratio scenarios. Based on the thermodynamic model of various types of cogeneration unit，the heat-power operation region of the modified cogeneration plant is obtained. The optimal scheduling of cogeneration units with the lowest imbalance between power provision and demand is performed in the thermal-wind-solar multi-energy complementary system under two scenarios.The results show that，compared with the original cogeneration plant，the modified cogeneration plant can provide greater peaking capacity and space for renewable energy consumption.The optimal scheduling results in the thermal-wind-solar multi-energy complementary system show that，the cumulative imbalance between power provision and demand of the modified plant is significantly lower than that of the original plant.Moreover，the larger the share of baseload within the energy system，the less favorable for coal-fired units to smoothen the fluctuation of renewable energy.Further，the optimal power load distribution of the modified cogeneration plant to cope with the fluctuation of renewable energy sources is investigated. The results of this study demonstrate that the modified coal-fired cogeneration units can significantly smooth out the fluctuation of high-penetration renewable energy，which improves the consumption of renewable energy resources.The proposed scheduling strategies for cogeneration units provide a certain reference for their operation optimization and the appropriate flexibility modification type selection during the energy system transition process in Shandong Province.

关键词(KeyWords)：热电联产；可再生能源消纳；渗透率；机组改造
cogeneration；renewable energy consumption；penetration rate；unit modification
基金项目(Foundation):国家电网公司科技项目（5400-202236173A-1-1-ZN）；国网山东电科院自主研发项目（ZY-2023-04）
Science and Technology Project of State Grid Corporation of China（5400-202236173A-1-1-ZN）；Independent Research and Development Project of State Grid Shandong Electric Power Research Institute（ZY-2023-04）
作者(Author): 祝令凯，郑威，钟子威，王琮瑜，宋继伟
ZHU Lingkai，ZHENG Wei，ZHONG Ziwei，WANG Congyu，SONG Jiwei
DOI: 10.20097/j.cnki.issn1007-9904.2024.10.008
收稿日期(Received): 2023-09-19; 修回日期(Revised): 2024-06-03

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