Affiliation:
1. State Grid Chongqing Electric Power Research Institute, Chongqing 401123, China
2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Abstract
The corrosion of grounding grid materials in soil is a prominent factor in power and electrical equipment failure. This paper aims to delve into the corrosion characteristics of grounding grid materials and the corresponding methods of safeguarding against this phenomenon. Firstly, the influencing factors of the soil environment on the corrosion of the grounding grid are introduced, including soil physicochemical properties, microorganisms, and stray currents. Then, the corrosion behavior and durability of common grounding grid materials such as copper, carbon steel, and galvanized steel are discussed in detail and compared comprehensively. In addition, commonly used protective measures in China and outside China, including anti-corrosion coatings, electrochemical protection, and other technologies are introduced. Finally, it summarizes the current research progress and potential future directions of this field of study.
Funder
State Grid Chongqing Electric Power Research Institute
Subject
General Materials Science
Reference135 articles.
1. Study on a 110 kV Combined Prefabricated Joint Fault Caused by Premature Failure of Grounding Grid;Huang;Eng. Fail. Anal.,2022
2. Puttarach, A., Chakpitak, N., Kasirawat, T., and Pongsriwat, C. (2007, January 1–5). Substation Grounding Grid Analysis with the Variation of Soil Layer Depth Method. Proceedings of the 2007 IEEE Lausanne Power Tech, Lausanne, Switzerland.
3. De Araujo, A.R.J., De Azevedo, W.L.M., D’Annibale, J.L.A., Da Silva, W.C., and Filho, J.P. (2021, January 15–18). Transient Analysis of Interconnected Grounding Grids under Physically Damaged Conditions. Proceedings of the 2021 14th IEEE International Conference on Industry Applications (Induscon), São Paulo, Brazil.
4. Analysis on Importance and Basic Requirements of Proper Grounding in Power Plants and Substations;Lv;Process. Auto Instrum.,2010
5. A Method for Grounding Grid Corrosion Rate Prediction;Han;Proceedings of the 3rd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE),2017