Control strategies of offshore wind power low frequency transmission system under asymmetric fault of low-frequency side

被引:0
作者
Gao X. [1 ,2 ]
Zhang C. [1 ,2 ]
Song G. [1 ,2 ]
Jiang J. [1 ,2 ]
Lü Y. [1 ,2 ]
机构
[1] Shaanxi Key Laboratory of Smart Grid, Xi’an Jiaotong University, Xi’an
[2] School of Electrical Engineering, Xi’an Jiaotong University, Xi’an
来源
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 10期
关键词
asymmetric faults; fault analysis; modular multilevel matrix converter; negative-sequence current control; offshore wind power low frequency transmission system; V/f voltage-dropping control;
D O I
10.16081/j.epae.202304008
中图分类号
学科分类号
摘要
Asymmetric faults of low-frequency submarine cable will lead to risks of overcurrent of power electronic devices in modular multilevel matrix converter(M3C) and overvoltage in the non-fault phase,which brings great challenges to offshore wind power low frequency transmission system(LFTS). To solve the above problems,a control strategy for asymmetric fault of submarine cable is proposed based on excellent controllability of power electronic equipment in M3C. The low-frequency side voltage of M3C is adjusted dynamically according to the fault severity to avoid overvoltage in the healthy phase. Meanwhile,to limit the amplitude of short circuit current and protect power devices from overcurrent,the negative-sequence current is suppressed by sub-converters. Then the fault equivalent model is derived for fault analysis with taking the influence of control strategy into account. The model of offshore wind power LFTS is built in PSCAD/EMTDC. The simulative results validate the effectiveness of the proposed control strategy and fault analysis method. The strategy can realize stable operation of the system under asymmetric fault of low-frequency side. © 2023 Electric Power Automation Equipment Press. All rights reserved.
引用
收藏
页码:160 / 166
页数:6
相关论文
共 20 条
[1]  
CHENG Qiming, XIE Yiqun, MA Xinqiao, Et al., Flatness-based control strategy of modular multilevel matrix converter[J], Electric Power Automation Equipment, 42, 1, pp. 185-192, (2022)
[2]  
WANG Xifan, WEI Xiaohui, NING Lianhui, Et al., Integration techniques and transmission schemes for off-shore wind farms [J], Proceedings of the CSEE, 34, 31, pp. 5459-5466, (2014)
[3]  
WANG Bangyan, WANG Xiuli, WANG Biyang, Et al., Reliability evaluation model and method of offshore wind power fractional frequency delivery system[J], Power System Technology, 46, 8, pp. 2899-2909, (2022)
[4]  
WANG Xifan, WANG Xiuli, Feasibility study of fractional frequency transmission system[J], IEEE Transactions on Power Systems, 11, 2, pp. 962-967, (1996)
[5]  
Zheng XU, Main schemes and key technical problems for grid integration of offshore wind farm[J], Automation of Electric Power Systems, 46, 21, pp. 1-10, (2022)
[6]  
Shenquan LIU, WANG Xifan, NING Lianhui, Et al., Integrating offshore wind power via fractional frequency transmission system[J], IEEE Transactions on Power Delivery, 32, 3, pp. 1253-1261, (2017)
[7]  
TANG Yingjie, ZHANG Zheren, XU Zheng, Low-frequency transmission scheme for offshore wind power based on active modular multilevel matrix converter[J], Automation of Electric Power Systems, 46, 8, pp. 113-122, (2022)
[8]  
KAWAMURA W, HAGIWARA M, AKAGI H., Control and experiment of a modular multilevel cascade converter based on triple-star bridge cells(MMCC-TSBC)[J], IEEE Transactions on Industrial Applications, 50, 5, pp. 3536-3548, (2014)
[9]  
Wenxi YAO, Jian LIU, Zhengyu LU, Distributed control for the modular multilevel matrix converter[J], IEEE Transactions on Power Electronics, 34, 4, pp. 3775-3788, (2019)
[10]  
CHENG Qiming, LAI Yusheng, LI Jianhui, Et al., Passivity-based control strategy of modular multilevel matrix converter based on double dq coordinate transformation[J], Electric Power Automation Equipment, 43, 3, pp. 16-22, (2023)