A New Protection Scheme of Intersystem Fault for AC/DC Hybrid Overhead Lines

Yan Tao (), Xiangping Kong, Chenqing Wang, Junchao Zheng, Zijun Bin, Jinjiao Lin and Sudi Xu
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Yan Tao: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Xiangping Kong: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Chenqing Wang: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Junchao Zheng: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Zijun Bin: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Jinjiao Lin: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China
Sudi Xu: Electric Power Research Institute of Jiangsu Electric Power Co., Ltd., Nanjing 211103, China

Energies, 2025, vol. 18, issue 7, 1-15

Abstract: Transforming the existing key HVAC transmission lines into High Voltage Direct Current (HVDC) transmission systems is a new type of transmission capacity expansion scheme that has been applied in power systems in Germany, the United Kingdom and other regions. After the occurrence of AC/DC intersystem faults, the fault characteristics are complex, and the protection adaptability will be affected. At present, there is no specific protection scheme for AC/DC intersystem faults. In this paper, a protection scheme based on the same side current similarity characteristics of AC and DC transmission lines is proposed, and the Hausdorff distance algorithm is introduced to measure two sets of current waveforms under different fault scenarios. The proposed protection scheme can complete the fault identification within a few milliseconds after the fault and has good rapidity and application prospects, and the effective value of the scheme is verified on the simulation platform.

Keywords: HVAC; HVDC; intersystem faults; protection scheme (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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