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Application of Symmetric Conditions in the Simulation of High Voltage Power Transmission Models

The height of the power transmitting towers is usually in the range of 10m to 40m and the separation between two consecutive towers is about 200m to 400m. In addition, the area of the ground that needs to be considered in the simulation is large. Therefore, Finite Element Method (FEM) is not suitable for simulation of this application. Whereas Boundary Element Method (BEM) is best suited for these open region problems. This paper refers to...

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Overhead T&D

Transmission Line Resiliency

"Smart" Insulator

Resiliency is a term used more and more by transmission line stakeholders including designers, operators, and owners. Resilience is simply defined as toughness or the capacity to recover quickly from difficulties. It can be used to describe a system, an object or even a person. Dr. Ginsburg, child pediatrician and human development expert, proposes 7 C’s that make up being resilient – competence, confidence, connection, character, contribution, coping and control. Although some of these words may not be the first choice for describing transmission-line resilience, they surprisingly apply.

Competence is the ability to handle difficult situations effectively. Transmission lines are found in practically every environmental condition and there is an optimum line design for the conditions it must endure. Confidence is the belief in the abilities demonstrated from competence. Transmission line stakeholders must have the highest level of confidence in the materials and practices being utilized. Connection is the tie to...

Overhead


Emergency Response Kitting

Equipping utilities to restore power quickly and efficiently BY JOE D’ORAZIO, HD Supply Power Solutions In the days before Hurricane Sandy hit the East Coast of the United States, knocking out power from North Carolina to Maine and as far inland as Western Pennsylvania, utility contractors were...

Underground


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...

Infrastructure


Coping with Extreme Weather Events

How to optimize the entire outage lifecycle BY RICK NICHOLSON, Ventyx The extreme weather just keeps coming. In 2012, there were 11 outages due to severe weather costing at least $1 billion. The year of 2013 had its share as well. More and more, the scale and variety of such major events are...