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Design Considerations When Constrained by a Fixed Route

When a paralleling power line or pipeline route has been committed to close to an existing utility the induced AC (IAC) mitigation engineer may be seveely limited in the techniques available to adequately ground the pipeline(s) where required. Such was the case on a recently completed 220 kV wind farm transmission line in southern California. Very extensive computer modeling was required to find acceptable grounding techniques and practices on the four large diameter natural gas pipelines that were affcted by the 220 kV circuit. Work was divided into two phases so that the initial wind farm load could be safely transmitted before the complete mitigation package could be constructed. Design and construction of the phase 2 mitigation system required well over a year to complete and seiously delayed adding additional generation to the circuit.

Product Number: 51319-13037-SG
Author: Earl Kirkpatrick
Publication Date: 2019
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