Overhead T&D

Wire and Cable

The Overlooked Benefits of High-Performance Powerline Conductors

Background:For over 100 years Transmission Engineers have relied on aluminum conductors strengthened by steel core wires, commonly referred to as ACSR conductors. These conductors offered reasonable performance and durability and were capable of operating at temperatures up to 93° C. Above this...

Vegetation Management

Implementing Advanced Vegetation Management Strategies

Improve grid reliability today. BY SARA SANKOWICH, Unitil In 2011, the New England region faced two significant weather events: Hurricane Irene and an unseasonably early October snowstorm—on top of other frequent major storm events in the preceding four years. Utilities could not avoid the...

Overhead Distribution

Q&A: Transmission Line Inspection Using Robotics

A: Hydro-Québec’s power transmission system, the most extensive in North America, covers close to 34,000 km. Similar to many power utilities, we need thorough infrastructure inspections to ensure system reliability, availability, and performance.Therefore, we have, developed robotic...

Conductors & Materials

The Evolution / Revolution of Overhead Conductors... and why it matters

Brief Background: In the early 1900’s Aluminum Conductor Steel Reinforced (ACSR) conductor was developed to replace copper wires, due to the war effort when copper was needed for munitions. In the 1970’s growing demand for electricity inspired the development of higher capacity...

Infrastructure & Technologies

IN THE DRIVER’S SEAT AND AHEAD OF THE CURVE ON EPC PROJECTS

Based just south of Denver in Castle Rock, Colorado, Great Southwestern Construction, Inc. (Great Southwestern) opened its doors as a small, family-owned business in 1977, specializing in power delivery projects throughout the desert Southwest and Rocky Mountain region. In the mid 1980’s, the...

Underground Distribution

Underground Smart Grid

In recent years, the cost to bury high-voltage power lines has decreased dramatically. The American Transmission Company reports that installation costs for underground transmission lines (over 100 kilovolts) are now only 2.5 to 10 times the cost of an equivalent overhead line. Consequently, the...

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Lightning Discoveries & Technologies

How this phenomenon affects electric utilities

BY JIM SIEBERT, FOX 26 Chief Meteorologist

Advances in technology are helping scientists understand lightning in ways that were not possible a few years ago. Beforehand, meteorologists primarily studied lightning, focusing most of their efforts on explaining why and how this phenomenon occurs. However, geologists and other earth scientists have joined in the study of unraveling lightning mysteries. A new understanding of why lightning strikes locations is starting to...

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