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Title: Experience In A Gas Distribution System With Hvdc
Author: Malcolm Carlson
Source: American Gas Association 1981
Year Published: 1981
Abstract: The interference effects on cathodically protected small town gas distribution systems caused by a high voltage direct current power hne are discussed. The power line runs from Underwood, North Dakota to Delano, Minnesota. Most of the information presented involves the Minnesota Gas Company town closest to the East Electrode, a distance of seven miles. Three periods of testing have been completed. The first test in 1978 at earth current values up to 600 amps was conducted for the purpose of locating areas of interference and providing indications of the magnitude. Remedial devices were then installed and a second test at 600 amps was conducted in 1979. Additional remedial devices were installed and a third test at 1,200 amps was completed in 1980. The status at this time is that more remedial devices are being installed and additional testing will be performed in 1981.

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