上海交通大学学报 ›› 2024, Vol. 58 ›› Issue (12): 1903-1914.doi: 10.16183/j.cnki.jsjtu.2023.246

• 新型电力系统与综合能源 • 上一篇    下一篇

电网短路故障下风电场内跟-构网电源瞬时频率交互影响机理

张宇, 张琛1(), 鲍颜红2, 吴峰2, 蔡旭1   

  1. 1.上海交通大学 电子信息与电气工程学院,上海 200240
    2.南瑞集团有限公司(国网电力科学研究院有限公司),南京 211106
  • 收稿日期:2023-06-15 修回日期:2023-07-24 接受日期:2023-08-07 出版日期:2024-12-28 发布日期:2025-01-06
  • 通讯作者: 张 琛,副教授,博士生导师;E-mail:nealbc@sjtu.edu.cn.
  • 作者简介:张 宇(1996—),博士生,从事大规模新能源并网稳定性研究.
  • 基金资助:
    国家电网有限公司总部科技项目(5100-202140498A-0-5-ZN)

Transient Frequency Interaction Between Grid-Following and Grid-Forming Sources in Windfarm Under Severe Grid Faults

ZHANG Yu, ZHANG Chen1(), BAO Yanhong2, WU Feng2, CAI Xu1   

  1. 1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2. NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211106, China
  • Received:2023-06-15 Revised:2023-07-24 Accepted:2023-08-07 Online:2024-12-28 Published:2025-01-06

摘要:

针对含构网型储能的异构型风电场的暂态稳定性问题,建立包含跟网型风电机组和构网型储能电源的异构系统暂态分析模型,揭示在电网严重短路故障下异构电源之间的频率交互机制,发现故障期间具有较慢功角动态的构网型电源对具有较快功角动态的跟网型电源的“频率牵引效应”,以及在满足频率牵引条件时后者对于前者的“功角联合驱动效应”.求解临界d轴电流,分析风电并网率、储能电源装机占比等参数变化对于频率交互的影响,并讨论风电机组无功电流注入及构网型储能电源的电流限幅策略等因素的影响.最后,基于MATLAB/Simulink仿真平台详细验证所提机理.

关键词: 异构系统, 风电场, 储能电源, 暂态稳定性, 频率牵引

Abstract:

To address the issues of transient stability in heterogeneous wind farms with grid-forming energy storage, a transient analysis model of the heterogeneous system is developed, which incorporates both grid-following wind turbine units and grid-forming energy storage sources. The mechanism of frequency interaction among heterogeneous power sources during severe grid short-circuit faults is revealed by the model. It is discovered that grid-forming energy sources with slower rotor angle dynamics exhibits a frequency pinning effect on those with faster rotor angle dynamics, and the latter has a rotor angle co-driving effect on the former under the condition of frequency pinning. By solving the critical d-axis current, the impacts of wind power integration rate, the proportion of energy storage installation, and other parameters on frequency interaction are analyzed. The effects of wind turbine unit reactive power injection and the current limiting strategy of grid-forming energy storage sources are also discussed. Finally, the proposed mechanisms are comprehensively validated by simulations using MATLAB/Simulink platform.

Key words: heterogeneous system, windfarm, battery energy storage sources, transient stability, frequency pinning effect

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