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Scope
This guide identifies the mechanisms and analytical approach for ac interference effects on conductive linear facilities due to the operation of co-located electric transmission lines. The common mechanisms for ac interference, including magnetic inductive coupling, capacitive coupling, and conductive voltage transfer through soil are discussed. Included are general guidelines and considerations for performing detailed ac interference analyses, with sections specific to the analysis of co-located pipeline and railroad facilities. This guide does not dictate specific compliance limits, direct when an ac interference analysis must be performed, or cover other issues that may need to be considered in joint-use corridors, such as effects due to lightning striking the line or dc corrosion on structures.
Purpose
The electric utility industry is often encouraged or required to share corridors with other linear facilities, such as pipelines and railroads. Electric transmission lines can electromagnetically couple onto and energize adjacent facilities, resulting in electrical hazards to personnel and equipment. Guidance for analyzing these hazards is limited. The purpose of this guide is to provide general guidance on when a study may be required to analyze these hazards, what data is needed for a study, available industry compliance limits, general scenarios that may need to be analyzed, and sample mitigation approaches. This guide aids users, from both the electric utility and affected facility, in understanding the concerns and to develop approaches for studying and mitigating ac interference issues on their systems. While the guide focuses on co-located transmission lines and pipeline or railroad facilities, much of the information applies to similar linear facilities.
Abstract
New IEEE Standard - Active.This guide identifies the mechanisms and analytic approach for ac interference effects on conductive linear facilities due to the operation of co-located electric transmission lines. The common mechanisms for ac interference such as magnetic inductive coupling, capacitive coupling, and conductive voltage transfer through soil are discussed. Included are general guidelines and considerations for performing detailed ac interference analyses, with sections specific to the analysis of co-located pipeline and railroad facilities. This guide does not dictate specific compliance limits, direct when an ac interference analysis must be performed, or cover other issues that may need to be considered in joint-use corridors, such as effects due to lightning striking the line or dc corrosion on structures.
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