Ride-through Control of Fractional Frequency Offshore Wind Power System During Unsymmetrical Grid Faults

被引：0
|
作者：
Zhao B. [1 ]
Wang X. [1 ]
Ning L. [1 ]
Wang X. [1 ]
Meng Y. [1 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Shaanxi Province, Xi’an
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 12期
关键词：
fault ride-through; fractional frequency transmission system; modular multilevel matrix converter; offshore wind farm;
D O I：
10.13334/j.0258-8013.pcsee.220598
中图分类号：
学科分类号：
摘要：
This paper proposes a fault ride-through control strategy for fractional frequency offshore wind power system (FFOWPS) during unsymmetrical grid faults. First, the basic structure and operation mode of the FFOWPS are introduced. Secondly, according to the mathematical model of the key frequency conversion equipment, modular multi-level matrix converter (M3C), the operating characteristics of the M3C under unsymmetrical grid voltage are revealed, and then the fault ride-through control strategy of the FFOWPS is proposed. Based on the classic double αβ0 coordinate transformation control of M3C, the proposed strategy improves the inter-arm voltage balancing control strategy, and introduces the M3C-wind farm joint voltage-frequency-power droop control to reduce the output of the wind farm. Finally, the electromagnetic transient simulation model of FFOWPS is built in MATLAB/Simulink, and the proposed control strategy is verified. The simulation results show that the proposed fault ride-through control strategy can ensure the safety of M3C, while meeting the power transmission requirements of wind farms, and achieving the goal of reactive power support for power systems by the offshore wind farm. ©2023 Chin.Soc.for Elec.Eng.
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收藏
页码：4589 / 4599
页数：10
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