A new protection scheme of intersystem fault for AC/DC hybrid overhead lines

  1. Tao Yan
  2. Kong Xiangping
  3. Wang Chenqing
  4. Zheng Junchao
  5. Bin Zijun
  6. Lin Jinjiao
  7. Xu Sudi
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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, which 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 effective value of the scheme is verified on the simulation platform.

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  1. Version published to 10.21203/rs.3.rs-5948813/v1 on Research Square