The theory and implementation of corrosion diagnosis for grounding system

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344) Pub Date : 2002-12-10 DOI:10.1109/IAS.2002.1042700

Rong Zheng, Jinliang He, Jun Hu, G. Lu, B. Luo

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引用次数: 32

Abstract

In China, the grounding system is made of steel. When the steel corrodes, it is a potential problem and very dangerous to the power system, since it is buried under ground. How to obtain the status of the corrosion easily is very important for the safety of the operation. A novel method is proposed, by which corrosion status of grounding system can be diagnosed from measured port resistances among the touchable down-lead conductors connected to the grounding grid. First, the mathematical relationship between the corrosion status of the grounding grid's all grounding conductors and the measured port resistances is deduced in detail based on circuit model and theory. Then, an appropriate mathematical model is discussed for practicable computation. The completed corrosion diagnosis system, including hardware device of data measurement, diagnosis and analysis software, is also introduced concisely. Finally, the field test report is provided to validate the method.

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接地系统腐蚀诊断的理论与实现

在中国，接地系统是钢制的。由于钢被埋在地下，当钢被腐蚀时，对电力系统是一个潜在的问题，是非常危险的。如何方便地获取腐蚀状态对操作的安全是非常重要的。提出了一种通过测量接地网的可触引导线之间的端口电阻来诊断接地系统腐蚀状况的新方法。首先，基于电路模型和理论推导了接地网各接地导线腐蚀状态与实测端口电阻之间的数学关系。然后讨论了适合实际计算的数学模型。简要介绍了完整的腐蚀诊断系统，包括数据测量的硬件装置、诊断和分析软件。最后，给出了现场试验报告，验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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