- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Liyan, LUO Bo, ZHENG Xing, LIU Yuxiao, WANG Jie. Protection Scheme of New Continuous Cable Power Supply System[J]. Journal of Southwest Jiaotong University, 2023, 58(5): 1135-1144. doi: 10.3969/j.issn.0258-2724.20220510
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In order to solve the problem of misoperation of catenary and traction cables in a new continuous cable power supply system using the existing sectional protection scheme, firstly, the mechanism of load current on current longitudinal differential protection of the catenary was studied, and a fault component current longitudinal differential protection scheme of the catenary was proposed. Then the phasor method was used to analyze the influence of capacitance current on the existing protection scheme of traction cables under no load condition. The protection of longitudinal current difference was realized by shunting reactors at both ends of the traction cable in each sectional loop under no load and cutting off the reactor under load. The results show that the load current in the catenary supplied by the traction transformers on both sides is the cause of the misoperation of the current longitudinal differential protection of the catenary. However, the proposed short-circuit protection of the catenary composed of fault component current is not affected by the normal load current under the bilateral power supply. Under no load condition, the capacitance current will change the amplitude and phase angle of the end current of the traction cable compared with the first end current, resulting in the misoperation of the protection. The proposed method of shunting reactors at both ends of traction cables can solve this problem.
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