考虑流量调节灵活性的压缩空气储能压缩机高效启动策略

发电技术

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考虑流量调节灵活性的压缩空气储能压缩机高效启动策略

张险峰¹，梅生伟²，李建华³，郭俊波³，唐霜³，陈来军^2*

1．中国长江三峡集团有限公司，湖北省武汉市 430010；2．清华大学电机工程与应用电子技术系，北京市海淀区 100084；3. 中国三峡新能源(集团)股份有限公司，北京市西城区100053

基金资助:
中国三峡新能源(集团)股份有限公司科研项目资助(15044105)；国家自然科学基金项目(52407115)

High-Efficiency Startup Strategy for Compressors in Compressed Air Energy Storage Considering Flow Regulation Flexibility

ZHANG Xianfeng¹, MEI Shengwei², LI Jianhua³, GUO Junbo³, TANG Shuang³, CHEN Laijun^2*

1. China Three Gorges Corporation, Wuhan 430010, Hubei Province, China; 2. Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing 100084, China; 3. China Three Gorges Renewables (Group) Co., Ltd., Xicheng District, Beijing 100053, China

Supported by:
Project Supported by the Scientific Research Project of China Three Gorges Renewables (Group) Co., Ltd. (15044105); National Natural Science Foundation of China (52407115).

摘要/Abstract

摘要： 【目的】先进绝热压缩空气储能(advanced adiabatic compressed air energy storage，AA-CAES)作为大规模储能中的重要支撑技术，是提高电网新能源消纳能力的有效手段。然而，压缩机在启动过程易出现喘振和阻塞等不良动态，给压缩系统的启动阶段带来安全隐患。为此，以AA-CAES系统压缩机高效启动为目标，针对工程实际中防喘阀灵活调节受限的问题，提出了考虑可变流量控制的压缩机启动策略。【方法】建立了压缩机变工况动态模型并对防喘阀进行建模，利用最小二乘法对喘振阻塞进行刻画。基于防喘阀的调节潜力，提出了一种考虑流量调节灵活性的压缩机启动策略，并通过仿真验证了该启动策略的有效性。【结果】相比于防喘阀全开的常规防喘振操作，将喘振裕度调整为75%，可以在减少冗余安全裕度的前提下使压缩机效率提升1%以上。【结论】所提策略能够使压缩机具备一定的安全运行裕度且提升其效率，实现了压缩机的安全高效启动。

关键词: 新能源, 电网, 先进绝热压缩空气储能, 压缩机启动, 喘振, 阻塞, 防喘阀

Abstract: [Objectives] As an important supporting technology for large-scale energy storage, advanced adiabatic compressed air energy storage (AA-CAES) is an effective means to improve the grid’s capacity for renewable energy consumption. However, compressors are prone to adverse dynamics such as surge and choke during startup, posing safety hazards to the compression system. Therefore, aiming for the high-efficiency startup of AA-CAES system compressors and addressing the limited flexibility of anti-surge valves in practical engineering, a compressor startup strategy considering variable flow control is proposed. [Methods] A dynamic model of the compressor under variable operating conditions is established, and the anti-surge valve is modeled. The phenomena of surge and choke are characterized using the least squares method. Based on the adjustment potential of the anti-surge valve, a startup strategy considering flow regulation flexibility is proposed, and its effectiveness is validated through simulation. [Results] Compared to the conventional anti-surge operation with the anti-surge valve fully open, adjusting the surge margin to 75% can improve compressor efficiency by over 1% while reducing redundant safety margins. [Conclusions] The proposed strategy enables the compressor to maintain certain safety margins while achieving efficiency improvement, realizing safe and efficient compressor startup.

Key words: renewable energy, power grid, advanced adiabatic compressed air energy storage, compressor startup, surge, choke, anti-surge valve

张险峰, 梅生伟, 李建华, 郭俊波, 唐霜, 陈来军. 考虑流量调节灵活性的压缩空气储能压缩机高效启动策略[J]. 发电技术.

ZHANG Xianfeng, MEI Shengwei, LI Jianhua, GUO Junbo, TANG Shuang, CHEN Laijun. High-Efficiency Startup Strategy for Compressors in Compressed Air Energy Storage Considering Flow Regulation Flexibility[J]. Power Generation Technology.

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