A new current differential protection scheme for Teed transmission lines

2006 ◽  
Author(s):  
Houlei Gao ◽  
P.A. Crossley
Keyword(s):  
Transmission Lines ◽  
Differential Protection ◽  
Protection Scheme ◽  
Current Differential Protection

scholarly journals A novel current differential protection for MMC-HVDC lines

2021 ◽  
Vol 2113 (1) ◽  
pp. 012053
Author(s):  
Yu Qin ◽  
Minghao Wen ◽  
Yu Bai ◽  
Yuxi Wang ◽  
Zeya Fang
Keyword(s):  
Transmission Lines ◽  
Synchronization Error ◽  
Data Synchronization ◽  
Differential Protection ◽  
Capacitive Current ◽  
Hvdc Transmission ◽  
Protection Scheme ◽  
Current Differential Protection ◽  
Dc Line ◽  
Transition Resistance

Abstract The present current differential protection for MMC-HVDC transmission lines has absolute selectivity and powerful ability to withstand high transition resistance, while it is easily affected by distributed capacitive current and data synchronization error. To solve the problem above, this article proposes a novel current differential protection scheme. The distributed capacitive current can be calculated by integrating the linear voltage distribution in real-time. Thus, the differential value of the midpoint currents of DC line, which are calculated based on the low-pass filtered measure voltages and currents on both sides, can be adopted to identify the fault. Besides, the data synchronization error can be eliminated based on the waveform matching of the calculated midpoint currents. This novel current differential protection has excellent performance and can solve the problems of traditional current differential protection for HVDC lines.

A Novel Fuzzy Theory-Based Differential Protection Scheme for Transmission Lines

2020 ◽  
Vol 12 (8) ◽  
Author(s):  
Mahyar Abasi ◽  
◽  
Ahmad Torabi Farsani ◽  
Arash Rohani ◽  
Arsalan Beigzadeh ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Fuzzy Theory ◽  
Differential Protection ◽  
Protection Scheme
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