Simulation method for calculating lightning back-striking performance of UHV transmission lines

A transmission line and ultra-high voltage technology, which is applied in the field of simulation calculation of lightning backlash performance of UHV transmission line, can solve problems such as no simulation calculation scheme for lightning backlash performance of UHV transmission line, and achieve accurate simulation results
CN103646148AInactive Publication Date: 2014-03-19STATE GRID CORP OF CHINA +1
3 Cites 38 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2014-03-19
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a simulation method for calculating the lightning back-striking performance of UHV transmission lines. The simulation method comprises the following steps: dividing wires among long-span transmission towers into a plurality of line segments, establishing a distributed parameter circuit model for each line segment, establishing a multi-wave impedance model for each tower, then selecting the lightning parameters according to lightning activities, integrating all models and calculating the lightning withstand level, and calculating to obtain the back-striking trip rate of the UHV transmission lines according to the lightning withstand level and a series of formulae. The simulation method disclosed by the invention establishes the distributed parameter models of the line segments in consideration of high long-span transmission towers and long line spans, subdivides the wave impedance of different parts of the towers, and establishes the multi-wave impedance models in consideration of the refraction and reflection processes of lightning waves on the tower bodies so as to make the simulation results more precise and practical.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present application relates to the technical field of ultra-high voltage power grids, and more specifically, relates to a method for simulating and calculating lightning backlash performance of ultra-high voltage transmission lines. Background technique

[0002] Since UHV transmission lines span very high towers, and the conductor spans are very long, there is a high probability of lightning strikes caused by the upward pilot caused by the tower and ground wire, and it is not easy to repair after a lightning strike accident. However, the existing simulation calculations of lightning backlash performance of transmission lines are generally proposed for ultra-high voltage and below lines, which do not consider the particularity of UHV transmission lines with large spans, so they cannot be applied to UHV transmission lines. Therefore, we need to study a systematic calculation method to simulate and calculate the lightning backlash performance of UHV t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More