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System for rating electric power transmission lines and equipment

  • US 5,140,257 A
  • Filed: 08/05/1991
  • Issued: 08/18/1992
  • Est. Priority Date: 06/22/1984
  • Status: Expired due to Term
First Claim
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1. A method for monitoring the current carrying capacity of a length of an overhead electrical power line which includes a plurality of overhead electric power line spans, comprising the steps of:

  • (a) monitoring on a real-time basis at least the actual conductor temperature parameter of said overhead electrical power line along at least one span, and using the monitored actual conductor temperature parameter to calculate the surface coefficient of heat transfer on said at least one monitored span;

    (b) generating data signals at said at least one monitored span corresponding to a desired maximum conductor temperature and said surface coefficient of heat transfer;

    (c) determining the current carrying capacity of each overhead electric power line span using at least the data signals generated in step (b); and

    (d) identifying the overhead electric power line span having the lowest current carrying capacity determined in step (c).

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