Large-current outdoor real model simulation test method for testing lightning impulse characteristics of grounding device

A technology of lightning impulse characteristics and grounding devices, applied in the direction of testing dielectric strength, etc., can solve the problems of small transient current, large difference in lightning current of test power supply, small scale and simplification, etc., and achieve the effect of narrowing the gap
CN102435918AInactive Publication Date: 2012-05-02ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
4 Cites 29 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
Publication Date
2012-05-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

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

Abstract

The invention relates to a simulation test method for testing the lightning protection performance of a pole and tower grounding device of high-voltage power transmission line. The existing impulse grounding test process has the problem that a test model is simple and small in comparison with a real grounding device, or the problem that the simulation experiment has large gap from the real condition resulting from the large difference between a test power supply and the real lightning current. The simulation test method provided by the invention comprises the following steps: measuring soil resistivity of the test field; determining the position of a voltage reference point during the impulse grounding test according to the power frequency ground resistance measurement result of the grounding device; arranging voltage and current leads during the impulse grounding test; carrying out large-current impulse grounding measurement of the grounding device; measuring the power frequency ground resistance of the grounding device again in such a manner that all electrodes are located in the same positions as in the previous measurement; and analyzing the impulse test result. The simulation test method provided by the invention can narrow the gap between the simulation test and the real condition, and can be used for resistance reduction scheme optimization and impulse performance evaluation of the pole and tower grounding device of the high-voltage power transmission line.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of overvoltage safety protection, in particular to a simulation test method for the lightning protection characteristics of a tower grounding device of a high-voltage transmission line, which is used to evaluate the impact characteristics of a tower grounding device of a high-voltage transmission line, and is especially suitable for Initial design phase and operational evaluation phase of grounding installations. Background technique

[0002] The tower grounding device needs to release the lightning current to the ground when the transmission line or the tower is struck by lightning, so that the potential rise of the tower is as small as possible, so as to reduce the lightning counter-tripping rate, so the design and evaluation of the grounding device are very important for the lightning protection of the transmission line. important.

[0003] In terms of the design of tower grounding devices, the tradition...

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