中国电机工程学报2024，Vol.44Issue(12)：4837-4849,中插19,14.DOI:10.13334/j.0258-8013.pcsee.231153
煤电机组耦合储热系统的灵活性调峰特性研究及其性能评价
Research and Evaluation on the Flexible Peaking Performance of Coal-fired Power Plants Coupled With Thermal Storage
摘要
Abstract
In the context of achieving carbon peaking and carbon neutrality,coal-fired power will be the main peak-shaving power supply for a long time to ensure the safety and stability of the power grid.Thermal storage is an important method to improve the flexibility of coal-fired power plants,but the operation characteristics of coal-fired power coupled thermal storage systems are still unclear,necessitating urgent research on the adaptability of various thermal storage technologies in combination with coal-fired power plants.In this study,a 600 MW coal-fired power plant is integrated with a 90 MW thermal storage unit,of which sensible,latent,and thermochemical heat storage are considered.The peak regulation ability and thermodynamic performance of the system are investigated in the heat storage/release processes,and the optimal coupling scheme is determined following the Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS)method.In comparison with hot water and molten salt heat storage,Ca(OH)2/CaO thermochemical heat storage has the best peak shaving capacity,peak shaving depth,and exergy efficiency,while the molten salt heat storage performs best in the heat release process.By evaluating with TOPSIS method,the best heat storage scheme for hot water,molten salt and Ca(OH)2/CaO thermochemical heat storage is to extract the main steam as the heat source,and the best heat release scheme is using No.2 high-pressure water as the cold source.Besides,the coal-fired power coupling molten salt heat storage is the best coupling scheme.The relevant research conclusions can provide theoretical and data support for the construction of coal-fired power coupling heat storage peak shaving systems.关键词
煤电机组/储热/调峰能力/热力学性能/熔融盐/优劣解距离法(TOPSIS)Key words
coal-fired power plant/thermal storage/peak shaving capacity/thermodynamic performance/molten salt/TOPSIS分类
能源科技引用本文复制引用
巩志强,商攀峰,徐明新,张怡,郭俊山,韩悦,祝令凯,郑威..煤电机组耦合储热系统的灵活性调峰特性研究及其性能评价[J].中国电机工程学报,2024,44(12):4837-4849,中插19,14.基金项目
国网山东省电力公司 2023 年自主研发项目(520626230005). 2023 Independent R&D Project of State Grid Shandong Electric Power Company(520626230005). （520626230005）
