Recent trends in power generation and distribution have resulted in increased number of utilities sharing the same right of way. As a result, AC induction on pipelines has become a greater concern, both from a safety and corrosion perspective. Two general grounding mitigation methods exist currently, surface grounding and vertical anodes. Both methods have their respective benefits and appropriate applications. This paper will examine the effective grounding resistance for each and also seek to determine which type of grounding is most suitable for mitigating AC induction on pipelines. Developments in AC mitigation and grounding techniques will also be examined to illustrate the future trends in AC mitigation practice and technology.

Subject
Ribbons, Circuits, Pipelines, Wiring, Soil resistivity, Grounding, Anode surfaces, Transmission lines, Electric potential, AC interference, Deep wells, Line current, Anodes
Keywords:
AC Interference, Mitigation, Pipeline, Induced AC, HVAC, Transmission line, Soil Resistivity, Grounding, Grounding effectiveness
© 2015 Association for Materials Protection and Performance (AMPP). All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of AMPP. Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2015
Association for Materials Protection and Performance (AMPP)
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