Fault location of an MMC-HVDC line based on CRS-LMD and SVD

被引:0
作者
He Y. [1 ]
Ma Q. [1 ]
Yu F. [1 ]
Liu X. [1 ]
机构
[1] College of Automation & Electric Engineering, Qingdao University of Science & Technology, Qingdao
来源
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2024年 / 52卷 / 01期
基金
中国国家自然科学基金;
关键词
fault location; flexible DC grid; LMD; rational spline interpolation; SVD; traveling wave extraction;
D O I
10.19783/j.cnki.pspc.230853
中图分类号
学科分类号
摘要
Uncertainty on the fault traveling wave velocity, the difficulty of wave head extraction, the randomness of noise interference and other factors in DC lines restrict the application of fault location technology in a DC power grid. To reduce the influence of the above factors on positioning accuracy, a fault location method based on characteristic rational spline LMD (CRS-LMD) and singular value decomposition (SVD) is proposed. First, the optimal pole coefficient is selected with the use of the feature scale, and tightness of the fitting curve is adjusted by rational spline interpolation. The local mean decomposition of the fault voltage traveling wave is realized. Secondly, SVD is used to extract the fault travelling wave head accurately. Finally, a simulation model of the Zhangbei ±500 kV flexible DC power grid is built in PSCAD/EMTDC to simulate various fault situations and output fault data. Matlab is used to process the fault data and verify the positioning algorithm. The results show that the proposed algorithm can realize fault location with different fault distances and fault types, and guarantee high accuracy under when there is superimposed noise and transition resistance. © 2024 Power System Protection and Control Press. All rights reserved.
引用
收藏
页码:121 / 132
页数:11
相关论文
共 23 条
[1]  
RAO Hong, ZHOU Yuebin, LI Weiwei, Et al., Engineering application and development prospect of VSC-HVDC transmission technology, Automation of Electric Power Systems, 47, 1, pp. 1-11, (2023)
[2]  
LEI Zhaoyu, HAO Liangshou, DAI Jiashui, Et al., A review of fault location methods in HVDC transmission lines, Power System Protection and Control, 50, 11, pp. 178-187, (2022)
[3]  
GUO Mingqun, MEI Nian, LI Tan, Et al., System design of ±500 kV Zhangbei VSC-based DC grid project, Power System Technology, 45, 10, pp. 4194-4204, (2021)
[4]  
CHANDIO R H, CHACHAR F A, SOOMRO J B, Et al., Control and protection of MMC-based HVDC systems: a review, Energy Reports, 9, pp. 1571-1588, (2023)
[5]  
LI Xuepeng, QUAN Yusheng, HUANG Xu, Et al., Application of mathematical morphology to traveling wave protection of HVDC transmission lines, Relay, 34, 5, pp. 5-9, (2006)
[6]  
TAO Caixia, DU Xue, GAO Fengyang, Et al., Single-phase to ground fault location of hybrid transmission lines based on empirical wavelet transform, Power System Protection and Control, 49, 10, pp. 105-112, (2021)
[7]  
LI Wenyi, PENG Yuehui, LIU Kunliang, Et al., Research on monitoring technology of mechanical characteristics of operating mechanism for high-voltage circuit breaker based on wavelet transform and random forest algorithm, High Voltage Apparatus, 58, 10, pp. 75-82, (2022)
[8]  
GAO Shuping, XU Zhenxi, SONG Guobing, Et al., Fault location of hybrid three-terminal HVDC transmission lines based on wavelet threshold denoising and CEEMD, Power System Protection and Control, 50, 3, pp. 29-40, (2022)
[9]  
ZHANG Y, CONG W., An improved single-ended frequency-domain-based fault detection scheme for MMC-HVDC transmission lines, International Journal of Electrical Power & Energy Systems, (2021)
[10]  
GAO Shuping, JIANG Yuanyue, SONG Guobing, Et al., Research on a fault location method for a hybrid three-terminal DC transmission line, Power System Protection and Control, 49, 15, pp. 76-83, (2021)