The Square Butte HVDC system is a mine mouth power project. Electric power is generated at the lignite coal fields near Center, North Dakota and is then tramsmitted over a 456 mile long d-c transmission line to Duluth, Minnesota. The HVDC system is rated at ±250 kilovolts d-c, 1,000 amperes, with a 500 megawatt rated capacity. Figure 1 shows the route of the transmission line, the location of the electrodes at the Duluth end, and the location of the Northern Natural Gas Company pipelines.

Subject
Electric current, Test methods, High voltage direct current, Voltage, Pipe to soil potential, Pipelines, Natural gas, Rectifiers, Scale, Electrical interference, Half cell potential, Electrodes, Electrode potential
© 1978 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).
1978
Association for Materials Protection and Performance (AMPP)
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