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A Tutorial on Optical Ground Wire Ratings Analysis for Protection Engineers

机译：保护工程师光接地线额定值分析教程

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Installation of an Optical Ground Wire (OPGW) is an increasingly common upgrade when replacing shield wire(s) on a transmission line, as it provides the added benefit of broadband communications capability. Utilizing such fiber installed inside the shield conductor comes with a substantial risk of damaging the communications circuit from annealing of the shield conductor due to ground fault current flow. The transient current-induced temperature rise on an OPGW is a simple calculation in itself, but sizing of an OPGW for adequate thermal capability requires careful consideration of numerous and often overlooked factors characterizing the total heating energy, many of which fall on the protection engineer to calculate. This paper provides a detailed overview of the principles and process to determine the required thermal withstand capacity of an OPGW and discusses a particularly complex case study with a novel mitigation solution.
机译：当在传输线上更换屏蔽线时，光接地线（OPGW）的安装是越来越常见的升级，因为它提供了宽带通信能力的附加好处。利用安装在屏蔽导体内的这种纤维具有损坏由于接地故障电流由于接地故障电流而损坏屏蔽导体的通信电路的大量风险。 OPGW上的瞬态电流诱导的温度上升本身是简单的计算，但是对于足够的热能的OPGW的尺寸需要仔细考虑众多和经常被忽视的因素，其特征在于整个加热能量，其中许多落在保护工程师上计算。本文详细概述了确定OPGW所需的热耐热能力，并讨论了一种具有新型缓解解决方案的特别复杂的案例研究。

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