Protection of Multi-Terminal VSC-HVDC Grids Based on the Response of the First Carrier Frequency Harmonic Current

被引：0
|
作者：
Ashouri, Mani [1 ]
Khazraj, Hesam [1 ]
da Silva, Filipe Faria [1 ]
Bak, Claus Leth [1 ]
机构：
[1] Aalborg Univ, Dept Energy Technol, Aalborg, Denmark
来源：
2018 53RD INTERNATIONAL UNIVERSITIES POWER ENGINEERING CONFERENCE (UPEC) | 2018年
关键词：
VSC-MTDC; Protection; Harmonics; VSC; FCFH Current; Singal Processing; Short-Time Fourier; HVDC; SCHEME;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Protection of multi-terminal Voltage Source Converter based High Voltage Direct Current (VSC-MTDC) grids is a major challenge for future practical DC transmission technology. According to the harmonic-based protection studies, the response of first carrier frequency harmonic (FCFH) current in Pulse Width Modulation (PWM)-based VSC-HVDC can be used to discriminate external AC faults in point to point VSC-HVDC systems. However, the application of FCFH current for a selective fault detection system in VSC-MTDC grids is not studied yet. This research investigates FCFH current existed in converter DC link measured data, to detect the faulty section in VSC-MTDC system, when the system face faults with variations in location and resistance. A radial VSC-MTDC system with 2-level PWM VSC converters is simulated in PSCAD and MATLAB is used to extract FCFH current based on short-time Fourier transform. Based on the relay locations, the results show the feasibility of the protection algorithm, in discriminating between internal and faults for each zone.
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页数：5
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