利用相变储热提升电力系统可再生能源消纳  

Improve the Integration of Renewable Energy Sources Into Power System by the Usage of Phase-change Heat Storage

作　　者：胡康[1] 徐飞[2] 陈磊[2] 潘海鸿 马学军 陈群[1] 

机构地区：[1]清华大学工程力学系热科学与动力工程教育部重点实验室,北京100084 [2]清华大学电机工程及应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [3]内蒙古丰泰发电有限公司,呼和浩特010030

出　　处：《工程热物理学报》2018年第1期1-7,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51422603);国家科技支撑计划(No.2015BAA01B03);国家电网公司科技项目(No.SGTJ0000KXJS1500072)

摘　　要：由于波动性和间歇性,可再生能源的大规模引入对电力系统灵活性提出了更高要求。然而目前以"以热定电"模式运行的热电联产厂在供热期的调节能力低,限制了电力系统灵活性,导致可再生能源消纳困难。本文针对一个含有风电厂的电-热综合能源系统,研究了一种应用相变储热装置提升热电联产系统灵活性的方法。基于(?)耗散热阻理论,将其热力子系统构建为热阻网络模型,进而将电-热综合能源系统构建为整体能量流模型,并依此对系统的调度策略进行了优化。结果显示:引入储热装置实现了用户热负荷与热电厂热出力的解耦,提高了系统灵活性;当热电联产机组的热电比保持恒定时,储热装置在日间(风电资源缺乏)时储热、在夜间(风电资源丰富)时放热,可使系统风电消纳达到最大。Due to fluctuation and intermittence, integration of renewable energy sources （RESs） requests more flexibility of power systems. However, the ＂heat-led＂ operation mode limits the adjustability of combined heat and power （CHP） plants, decreases the flexibility of the power systems, and reduces the accommodation of RESs, consequently. This paper studies an integrated thermal and power system with a wind power plant, and introduces a phase-change heat storage （HS） facility into the CHP plant to improve the adjustability. Based on the entransy dissipation-based thermal resistance theory, the thermal part of the system is modeled as a thermal resistance network to analyze the integrated system in a unified model, and optimize the scheduling of the integrated system. The results show that： 1） the HS facility increases the flexibility of power system by decoupling the heat supply and the heat load of the CHP plant, and 2） when the heat-to-electric generation ratio remains constant, the HS facility should releases heat in daytime （when the wind energy source is insufficient）, and stores heat in night （when the wind energy source is sufficient） to enlarge the wind energy accommodation.

关 键 词：电-热综合能源系统 相变储热 可再生能源 热电联产(CHP) 热阻 

分 类 号：TK019[动力工程及工程热物理]