• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2023, Vol. 44 ›› Issue (3): 66-76.doi: 10.12204/j.issn.1000-7229.2023.03.007

• 新型电力系统下配电网规划与运行优化关键技术研究及应用·栏目主持 王守相教授、赵倩宇博士· • 上一篇    下一篇

数据中心多供电单元并联系统低频导纳建模及稳定性分析

张宇华1(), 孙晓鹏1(), 郜登科2, 李鸿彪2   

  1. 1.上海电力大学电气工程学院,上海市200090
    2.上海科梁信息科技股份有限公司,上海市200030
  • 收稿日期:2022-05-06 出版日期:2023-03-01 发布日期:2023-03-02
  • 作者简介:张宇华(1975),男,博士,副教授,硕士生导师,主要研究方向为电力电子化电力系统建模及稳定性分析,E-mail:zhyhdq@126.com
    孙晓鹏(1996),男,硕士研究生,主要研究方向为电力电子化电力系统建模,E-mail:1362700370@qq.com
    郜登科(1984),男,博士,工程师,主要研究方向为大功率传动变频器
    李洪彪(1987),男,硕士,工程师,主要研究方向为现代电机控制技术
  • 基金资助:
    上海市科技攻关计划(19DZ1205402);上海市科技创新行动计划项目(19DZ2204700)

Low-Frequency Admittance Modeling and Stability Analysis of Multiple PSUs Parallel System in Data Center

ZHANG Yuhua1(), SUN Xiaopeng1(), GAO Dengke2, LI Hongbiao2   

  1. 1. School of Electric Power Engineering, Shanghai University of Electric Power, Shanghai 200090, China
    2. Shanghai Keliang Information Technology Co., Ltd., Shanghai 200030, China
  • Received:2022-05-06 Online:2023-03-01 Published:2023-03-02
  • Supported by:
    Shanghai Science and Technology Project(19DZ1205402);Shanghai Science and Technology Innovation Action Plan Project(19DZ2204700)

摘要:

数据中心供电系统内部多供电单元(power supply unit,PSU)与配电网间交互作用,易造成数据中心供电系统发生低频振荡现象,而当前针对数据中心多PSU低频振荡研究尚缺乏有效的分析模型。提出一种针对数据中心多PSU的低频导纳建模与稳定性分析方法。首先,在单相PSU低频导纳模型基础上,通过等效聚合多PSU频率耦合影响,建立考虑频率耦合效应及直流侧电压影响的多PSU低频导纳模型,以提高阻抗模型的精度。然后,建立多PSU并联系统中单相PSU低频导纳模型,并基于奈奎斯特稳定判据详细地分析PSU数量、容量和电压环参数对系统稳定性的影响,得出各因素对系统稳定性影响规律。最后,通过仿真实验验证了所提方法的有效性,为数据中心电力系统规划设计及稳定性运行提供可靠的分析模型。

关键词: 数据中心, 多供电单元并联, 低频振荡, 频率耦合, 系统稳定性

Abstract:

In view of the interaction between the power supply unit (PSU) inside the data center power supply system and the power distribution network, it is easy to cause low-frequency oscillation in the power supply system of the data center. At present, there is no effective analysis model for the research on the low-frequency oscillation of parallel multiple PSUs in the data center. Therefore, this paper proposes a low-frequency admittance modeling and stability analysis method for parallel multiple PSUs in data centers. On the basis of the low-frequency admittance model of the single-phase PSU, a low-frequency admittance model of parallel multiple PSUs considering the frequency coupling effect and the influence of the DC-side voltage is established by equivalently aggregating the frequency coupling effects of parallel multiple PSUs to improve the accuracy of the impedance model. The low-frequency admittance model of single-phase PSU in the parallel system; and according to the Nyquist stability criterion, the influence of the number, capacity and voltage-loop parameters of the PSU on the system stability is analyzed in detail, and the influence law of each factor on the system stability is obtained. The effectiveness of the proposed method is verified by simulation, and a reliable analysis model is provided for the planning, design and stable operation of the data center power system.

Key words: data center, parallel multiple PSUs, low-frequency oscillation, frequency coupling, system stability

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