Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2025 , Vol. 59 >Issue 10: 1442 - 1450

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.581

New Type Power System and the Integrated Energy

Control Strategy for Improving Active Frequency Support Capability of Offshore Wind Farm

  • LI Yibo ,
  • ZHOU Qian ,
  • ZHU Dandan ,
  • JIANG Yafeng ,
  • WU Qiuwei ,
  • CHEN Jian
Expand
  • 1 School of Electrical Engineering, Shandong University, Jinan 250061, China
    2 Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211100, China
    3 Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, Guangdong, China

Received date: 2023-11-17

  Revised date: 2024-02-03

  Accepted date: 2024-02-19

  Online published: 2024-03-15

Fold

Abstract

In low frequency alternating current (AC) transmission systems, offshore wind farm is unable to respond to changes in onshore grid frequency in a timely manner due to frequency decoupling and signal transmission delays between the offshore wind power system and the onshore AC system. To address this issue, a control strategy is proposed to improve the active frequency support capability of offshore wind farms by combining the system inertia. In terms of frequency signaling, an additional frequency sag controller is designed based on the V/f control strategy of the low-frequency-side structure network of modular multilevel matrix converter (M3C), combining with the system inertia. The frequency coupling link between the M3C net side and the low-frequency side is established to realize the real-time transmission of frequency information between the two sides. In terms of frequency support, when the system is disturbed to generate frequency deviation, the offshore wind turbine can adjust the power command value through additional droop control, thereby providing frequency support for the system. Finally, the effectiveness of the proposed coordinated control strategy is verified in MATLAB/Simulink by the simulation of load change and three-phase AC short circuit fault.

Key words： low frequency alternating current (LFAC) transmission system; frequency coupling; collaborative control strategy; frequency support

Cite this article

LI Yibo , ZHOU Qian , ZHU Dandan , JIANG Yafeng , WU Qiuwei , CHEN Jian . Control Strategy for Improving Active Frequency Support Capability of Offshore Wind Farm[J]. Journal of Shanghai Jiaotong University, 2025 , 59(10) : 1442 -1450 . DOI: 10.16183/j.cnki.jsjtu.2023.581

References

[1] 汤广福, 贺之渊, 庞辉. 柔性直流输电工程技术研究、应用及发展[J]. 电力系统自动化, 2013, 37(15): 3-14.
  TANG Guangfu, HE Zhiyuan, PANG Hui. Research, application and development of VSC-HVDC engineering technology[J]. Automation of Electric Power Systems, 2013, 37(15): 3-14.
[2] 王锡凡, 卫晓辉, 宁联辉, 等. 海上风电并网与输送方案比较[J]. 中国电机工程学报, 2014, 34(31): 5459-5466.
  WANG Xifan, WEI Xiaohui, NING Lianhui, et al. Integration techniques and transmission schemes for off-shore wind farms[J]. Proceedings of the CSEE, 2014, 34(31): 5459-5466.
[3] 李峰, 王广柱. 模块化多电平矩阵变换器电容电压纹波稳态分析[J]. 中国电机工程学报, 2013, 33(24): 52-58.
  LI Feng, WANG Guangzhu. Steady-state analysis of sub-modular capacitor voltage ripple in modular multilevel matrix converters[J]. Proceedings of the CSEE, 2013, 33(24): 52-58.
[4] LIU S Q, ZHAO B Y, WANG G, et al. An improved phasor method for modelling and analysis of modular multilevel matrix converter[J]. IEEE Transactions on Power Delivery, 2021, 36(3): 1744-1755.
[5] OATES C. A methodology for developing ‘Chainlink’ converters[C]// 2009 13th European Conference on Power Electronics and Applications. Barcelona, Spain: IEEE, 2009: 1-10.
[6] KAMMERER F, KOLB J, BRAUN M. A novel cascaded vector control scheme for the modular multilevel matrix converter[C]// IECON 2011-37th Annual Conference of the IEEE Industrial Electronics Society. Melbourne, Australia: IEEE, 2011: 1097-1102.
[7] KAMMERER F, KOLB J, BRAUN M. Fully decoupled current control and energy balancing of the modular multilevel matrix converter[C]// 2012 15th International Power Electronics and Motion Control Conference. Novi Sad, Serbia: IEEE, 2012: LS2a.3-1-LS2a. 3-8.
[8] 吴小丹. 面向低频海上风电送出的模块化多电平矩阵变换器输入输出侧解耦控制[J]. 电网技术, 2022, 46(8): 2909-2923.
  WU Xiaodan. Input/output side decoupling control of modular multilevel matrix converter for low-frequency offshore wind power transmission[J]. Power System Technology, 2022, 46(8): 2909-2923.
[9] LIU S Q, WANG X F, MENG Y Q, et al. A decoupled control strategy of modular multilevel matrix converter for fractional frequency transmission system[J]. IEEE Transactions on Power Delivery, 2017, 32(4): 2111-2121.
[10] 孙玉巍, 常静恬, 付超, 等. 分频输电系统模块化多电平矩阵变换器谐波特性分析[J]. 电力工程技术, 2022, 41(5): 21-30.
  SUN Yuwei, CHANG Jingtian, FU Chao, et al. Harmonic characteristics analysis of modular multilevel matrix converter for fractional frequency transmission system[J]. Electric Power Engineering Technology, 2022, 41(5): 21-30.
[11] 马睿聪, 刘福锁, 曹永吉, 等. 电力系统频率动态与功角振荡的耦合特性分析[J]. 电力工程技术, 2023, 42(4): 102-112.
  MA Ruicong, LIU Fusuo, CAO Yongji, et al. Coupling characteristic analysis of power system frequency dynamic and power angle oscillation[J]. Electric Power Engineering Technology, 2023, 42(4): 102-112.
[12] LIU H Z, CHEN Z. Contribution of VSC-HVDC to frequency regulation of power systems with offshore wind generation[J]. IEEE Transactions on Energy Conversion, 2015, 30(3): 918-926.
[13] 李宇骏, 杨勇, 李颖毅, 等. 提高电力系统惯性水平的风电场和VSC-HVDC协同控制策略[J]. 中国电机工程学报, 2014, 34(34): 6021-6031.
  LI Yujun, YANG Yong, LI Yingyi, et al. Coordinated control of wind farms and VSC-HVDC to improve inertia level of power system[J]. Proceedings of the CSEE, 2014, 34(34): 6021-6031.
[14] 江守其, 徐亚男, 李国庆, 等. 提升海上风电经柔直联网系统频率稳定性的协调控制策略[J]. 电力自动化设备, 2023, 43(9): 194-201.
  JIANG Shouqi, XU Yanan, LI Guoqing, et al. Coordinated control strategy for improving frequency stability of MMC-HVDC connecting offshore wind power[J]. Electric Power Automation Equipment, 2023, 43(9): 194-201.
[15] 徐政, 张哲任. 低频输电技术原理之一: M-3C的数学模型与等效电路[J]. 浙江电力, 2021, 40(10): 13-21.
  XU Zheng, ZHANG Zheren. Principles of low frequency power transmission technology: Part 1-mathematical model and equivalent circuit of M3C[J]. Zhejiang Electric Power, 2021, 40(10): 13-21.
[16] 年珩, 金萧, 李光辉. 特高压直流换相失败对送端电网风机暂态无功特性的影响分析[J]. 中国电机工程学报, 2020, 40(13): 4111-4122.
  NIAN Heng, JIN Xiao, LI Guanghui. Influence of UHV DC commutation failure on the transient reactive power characteristics of wind turbines in sending terminal grid[J]. Proceedings of the CSEE, 2020, 40(13): 4111-4122.
[17] 秦世耀. 风电机组惯量及一次调频优化控制研究[D]. 南京: 东南大学, 2021.
  QIN Shiyao. Research on optimal control strategy of inertia and primary frequency regulation for wind turbines[D]. Nanjing: Southeast University, 2021.
[18] 周涛, 黄菊, 韩汝帅, 等. 综合惯性控制下风机惯性支撑能力分析及等效惯量评估[J]. 上海交通大学学报, 2024, 58(12): 1915-1924.
  ZHOU Tao, HUANG Ju, HAN Rushuai, et al. Analysis of inertial support capacity and equivalent inertia evaluation of wind turbine under comprehensive inertial control[J]. Journal of Shanghai Jiao Tong University, 2024, 58(12): 1915-1924.
[19] AIK D L H. A general-order system frequency response model incorporating load shedding: Analytic modeling and applications[J]. IEEE Transactions on Power Systems, 2006, 21(2): 709-717.
Options
Outlines

/

〈 〉