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Oncor Electric Delivery Interim Report

Sept. 30, 2011

Oncor Electric Delivery

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This document represents a Technical Performance Report for the Oncor Electric Delivery (Oncor) Smart Grid Demonstration Program (SGDP). This SGDP program applies real-time sensing instrumentation that will monitor the line conductor tension from several transmission lines. This information through an algorithm is used to calculate the Dynamic Line Rating (DLR) which represents the maximum line capacity, i.e., maximum power transfer capacity of the transmission line, based on ambient weather conditions and the physical location of the transmission lines. This information when incorporated into a utility's transmission management system is used to dynamically rate transmission circuits and supplement their transfer capacities. This Project is designed to demonstrate the effective use of dynamic line ratings to reduce transmission grid congestion and will estimate the dollar benefit to the wholesale electricity market based on data collected during the Project.

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