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29 November 2021 DC fault protection algorithm of multi-terminal HVDC transmission line with DC circuit breaker and transient traveling wave
Jiaolong Lv, Di Gai, Shizhe Ma, Yuanlong Bai, Yuejun Zhao, Hongxin Bao, Chuanbo Liu
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Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120803L (2021) https://doi.org/10.1117/12.2620276
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China
Abstract
Traditional AC system protection and conventional DC transmission system protection principles and methods are difficult to apply to current DC transmission lines. First, analyze the transient characteristics of DC transmission line faults, and then extract high-frequency transient voltage components at the moment of fault through wavelet changes. Based on the wavelet energy values of the faults inside and outside the zone, propose a fault identification method. A DC fault protection scheme based on the reclosing criterion. A fault protection algorithm based on the combination of DC circuit breaker and transient traveling wave is given. Finally, a four-terminal voltage source converter-type DC grid model was built on the Matlab / Simulink simulation platform, and the feasibility of the protection principle was verified through simulation experiments. The advantages are of great significance for the rapid determination of DC transmission faults.
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Jiaolong Lv, Di Gai, Shizhe Ma, Yuanlong Bai, Yuejun Zhao, Hongxin Bao, and Chuanbo Liu "DC fault protection algorithm of multi-terminal HVDC transmission line with DC circuit breaker and transient traveling wave", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120803L (29 November 2021); https://doi.org/10.1117/12.2620276
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KEYWORDS
Wavelets
Hybrid circuits
Wind energy
Solar energy
Switches
Discrete wavelet transforms
Switching
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