A Boundary Protection for Power Distribution Line Based on Equivalent Boundary Effect

作者：Zhang Xin^*; Mu Long-hua

来源：Journal of Electrical Engineering & Technology, 2013, 8(2): 262-270.

DOI：10.5370/JEET.2013.8.2.262

• Equivalent boundary effect
• Equivalent resonance component
• Power distribution line
• Boundary protection

A boundary protection method for power distribution line based on equivalent boundary effect is presented in this paper. In the proposed scheme, the equivalent resonance component with a certain central frequency is sleeve-mounted at the beginning of protected zone. The 'Line Boundary' is built by using boundary effect, which is created by introducing impedance in the primary-side of line. The 'Line Boundary' is significantly different from line wave impedance. Therefore, the boundary protection principle can be applied to power distribution line without line traps. To analyze the frequency characteristic corresponding to traveling-waves of introducing impedance in the primary-side of line, distributed parameters model of equivalent resonance component is established. The results of PSCAD/EMTDC simulation prove the obvious difference of voltage high frequency component between internal faults and external faults due to equivalent resonance component, and validate the scheme.

• 出版日期2013-3
• 单位同济大学