Method for evaluating lightning protection effective size coefficients of horizontal grounding body at different temperatures

Abstract

The invention discloses a method for evaluating lightning protection effective size coefficients of a horizontal grounding body at different temperatures, and the method comprises the steps of building a horizontal grounding body lightning protection effective size coefficient temperature control test device according to the evaluation method; according to the evaluation step, setting the test thermodynamic temperature through a test upper computer, and performing temperature adjustment on homogeneous soil around the horizontal grounding body through a temperature control test device; injecting transient voltage into the horizontal grounding body through a transient voltage generation device, and measuring wave head time of the injected transient voltage; and calculating and evaluating thelightning protection effective size coefficient of the horizontal grounding body according to the wave head time of the injected transient voltage and the test thermodynamic temperature. According tothe invention, the diffusion process of the transient current along the horizontal grounding body at different soil temperatures can be effectively simulated, the test precision is improved through real-time temperature control, and the lightning protection effective size coefficient of the horizontal grounding body can be accurately and effectively evaluated.

Description

technical field [0001] The invention belongs to the technical field of electric power system grounding, in particular to a method for evaluating the lightning protection effective size coefficient of a horizontal grounding body at different temperatures. Background technique [0002] Lightning is one of the most important causes of power outages or damage to power system equipment. Therefore, it is necessary to improve the lightning protection device and develop a more accurate prediction method for the lightning protection performance of the grounding system. For this reason, we can design and use different configurations of the grounding system to minimize damage to electrical equipment and protect personal safety. Most of the short-circuit current or lightning current is introduced into the earth to ensure the safe and stable operation of the equipment and improve the quality of electrical services. [0003] As demonstrated by many studies, at low frequency currents, esp...

AI Technical Summary

Problems solved by technology

At present, there are few studies on the effective size factor of lightning protection of horizontal grounding body at different temperatures in China, so there is an urgent need for a method to test and evaluate the effective size factor of lightning protection of horizontal grounding body at different temperatures, taking into account the influence of soil temperature around the grounding electrode , to provide reference for lightning protection design, optimization and transformation of power system

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