考虑燃气–蒸汽联合循环机组的机组组合建模综述

Review on Unit Commitment Modeling Considering Combined-cycle Gas Turbine

在“碳达峰、碳中和”背景下,燃气–蒸汽联合循环机组(combined-cycle gas turbine,CCGT)因其快速启动及深度调峰等优良特性,可为消纳大规模可再生能源提供灵活性资源,得到了广泛关注。首先,该文针对现有关于CCGT的6种建模方式,讨论其建模的精确性、计算效率以及解的可行性。其次,总结其中4种考虑机组内部轮机实际物理特性的模型,并比较他们的特点及适用范围。最后,考虑将蒸汽配合特性引入模型以及精细化启停过程、变量类型、收紧约束、结构变化对模型求解的影响。研究结果能够为推动适用于大规模机组组合的CCGT建模研究和应用提供一定参考。

In the context of“carbon neutrality”,combined-cycle gas turbines(CCGTs)provide flexible resources for the integration of large-scale renewable energy resources due to their excellent characteristics such as fast start-up speed and deep peak-regulating capabilities.Thus,it has won widespread attention in recent years.First,for the six existing modeling methods of CCGT,the modeling accuracy,calculation efficiency,and solution feasibility are discussed.Secondly,it summarizes four of the models that consider the actual physical characteristics of the internal turbine of the CCGT and compares their characteristics and scope of application.Finally,the effects of introducing steam coupling characteristics into the model and the refinement of the start-stop process,variable types,and tightening constraints on the solution of the model are considered;and the computational efficiency of different modeling methods is compared.The review in this paper can provide important insight for promoting the research and application of CCGT modeling for large-scale unit commitments.