Extending the 345-kV System in Connecticut
The current transmission system serving southwest Connecticut remains the only part of the state not currently served by a 345-kV transmission system, nor does it meet national electric reliability standards...
Aerial Survey Aids in Line Analysis
Public Service Electric and Gas Co. (PSE&G; Newark, New Jersey, U.S.), the oldest and largest publicly owned utility in the state of New Jersey, is in the middle of a 10-year plan to upgrade and enhance its electrical system....
New 345-kV Line Commences in Central Iowa
In January, MidAmerican Energy (MidAmerica; Des Moines, Iowa, U.S.) began construction on a 201-km (125-mile) transmission line and substation in Grimes, Iowa....
Arrowhead-Weston Nears Completion
American Transmission Co.’s (ATC; Waukesha, Wisconsin, U.S.) largest project, the Arrowhead-Weston 345-kV transmission line—spanning 354 km (220 miles) from Wausau, Wisconsin, to Duluth, Minnesota, U.S.—is off to a good start with the first pole set in October 2004...
AEP Constructs Six-Conductor 765-kV Line
Construction began last year for possibly the first in-service six-conductor 765-kV overhead transmission line in the United States, running from the Wyoming Substation in West Virginia to the Jackson Ferry Substation in Virginia....
Broken Strands
In the power industry, too many of us pretend to be someone we're not. We hide our flaws and weaknesses. Maybe we have good reasons to be paranoid. Why...
Deutsche Bahn Installs Transmission Line Ice Monitors
German rail company Deutsche Bahn has fully electrified its railways using a 16.7-Hz system. The power to the system is supplied by a transmission system...
Utilities Share Their Insulator Field Experience
The integrity of an overhead transmission line is directly related to the mechanical and electrical quality of the insulators that keep the line in the...
How Accurate Are Your Line Clearance Calculations?
Line-to-ground clearances dictate maximum line-loading levels, usually post-contingency, in many operating situations. Since measuring them all is not...
Nondestructive Testing of Concrete Leg Foundations
Transpower New Zealand, which owns and operates New Zealand's national grid, is embarking on a period of new building and upgrading of existing assets...
First U.S. 6-Bundle, 745-kV Line Requires Large Pulling Blocks
Transmission construction is a specialized type of line installation. Not only are structures taller, spans longer and conductors larger, but the pulls...
Utility Helicopter Operations
Helicopters are being used in the utilities industry now more than ever, not only for transport but also for inspection and maintenance of their T&D assets....
Stepping Up Distribution
Land developers asked El Paso Electric Co. (EPE) to reroute a portion of a radial 115-kV transmission line that feeds the town of Hatch, New Mexico, U.S.,...
Switzerland: BRUGG Switzerland Offers 500-kV XLPE Cables
After the successful completion of a 400-kV prequalification test according to IEC 62067 in 2003, Swiss-based cable manufacturer BRUGG Cables announced...
India: ABB Takes a Hand in Strengthening India's Power Grid
National Thermal Power Corp. Ltd. of India awarded ABB (Zurich, Switzerland) a $38 million order for extra-high-voltage transformers and reactors. The...
Building Infrastructure in a Region Known for Hurricanes
When you live and work on a relatively flat island, like tropical Grand Cayman, the largest of the three Cayman Islands located in the Caribbean Sea,...
GIS-Based Line-Siting Methodology
Controversy over transmission line construction has some Georgia Transmission Corp. (GTC) officials thinking that public pressure against new power lines...
New Pole Setting Procedure
In recent years, there have been many changes in the pole crew work environment. As our systems age, pole replacement has increased on energized lines,...
Monitoring the Power Grid
The complexity of operating large electric systems in the United States and Canada is increasing as power systems expand to include more independent and...
High-Tech Hammer Measures Crossarm Integrity
It started with an unrealistic wish. In 1998, as a member of Entergy's Transmission Technology Delivery Department (TTDD), I met with Entergy Transmission...
France: RTE Awards ABB Contract to Stabilize Power Grid in France
RTE, the French transmission system operator, awarded ABB a turnkey contract worth $15 million to install Flexible Alternating Current Transmission Systems...
Live-Line Techniques for Reduced Clearance Lines
Utilities, including the Bonneville Power Administration (BPA; Portland, Oregon, U.S.), are performing live-line maintenance safely and effectively. However,...
Topology Considerations in Transmission Line Design
Normally, the horizontal and vertical spacing between the phase conductors on a transmission line is decided by the minimum clearances required between...
Wind-Driven Cleaning Rings Help Prevent Insulator Flashovers
According to statistics, insulator flashovers caused by contamination are the second most prevalent type of transmission line incidents next to lightning...
Construction on the Edge of Hells Canyon
At 7900 ft (1589 km), Hells Canyon on the Idaho-Oregon border is the deepest gorge in North America, carved over the millennia by the raging waters of...
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