While HVDC transmission runs in monopolar mode, a large direct current will enter into the earth through its earth electrode. This current may cause serious interference on buried pipeline even though it is far away from the earth electrode. In this work, numerical simulation was used to study the mechanism and influencing factors of HVDC interference. The results indicated that while a large direct current entered into the earth through the earth electrode, it could create a strong electric field and induce serious interference on the pipeline. The better the pipeline’s coating was, the higher interference the pipeline suffered. Mitigating grounding beds had interaction with each other. The mitigating effectiveness was decided by the location and ground resistance of each mitigation grounding bed. Then, a field experiment was carried out to verify numerical simulation results.

Subject
Electric current, High voltage direct current, Materials, Modeling, Valves, Gas pipelines, Pipelines, Grounding, DC interference, Electrical interference, Electrodes, Soil, Electrode potential
Keywords:
HVDC interference, Mitigation, Numerical simulation, Field test
© 2017 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).
2017
Association for Materials Protection and Performance (AMPP)
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