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Substation Testing & Maintenance


Substation Focused on Environmental Design

One of the important trends in the design of new overhead lines over the past 20 years has been the development of structures and designs that are less obtrusive and more pleasing visually. Much the same process has also been going on at substations. Green infrastructure begins with sustainable...

Substation Automation


Building a better world of smart structures on the smart grid

It is a truth universally acknowledged that billions of people around the world live in poverty. But does it have to be that way? Today’s technological progress means that tomorrow we will be able to produce more, more efficiently – lifting people above the breadline with accelerated...

Lightning Protection


Grounding System Maintenance Guide

Grounding systems are a crucially important component of any power supply system, because they directly impact public and employee safety, supply system reliability, power quality and life expectancy of power equipment. In spite of their crucial role in safe, reliable, and economic operation of...

Breakers & Relays


Effective and Safe Testing of GIS Switchgear

To fully assess the functionality of medium and high voltage circuit breakers, various mechanical and electrical parameters must be tested. Gas-insulated switchgear (GIS) in particular poses unique and special challenges, including the connection of the test equipment. In today‘s world, where...

Physical Security & Monitoring


Current Trends in Transmission and Distribution

Sargent & Lundy has provided comprehensive engineering, development, permitting, high-level consulting, construction management, and commissioning services for electric power generation and power delivery projects worldwide—approximately 2,000 clients in nearly 100 countries—since...

Substation Technologies


Electrical Substations

Ensuring Compliance vs Building Resilience

The realization that the vast majority of substations have significant security vulnerabilities was crystalized after the Metcalf incident of April 2013, during which unknown assailants caused the failure of 17 transformers at the Silicon Valley PG&E transmission substation in Metcalf, California. Jon Wellinghoff, then Chairman of the Federal Energy Regulatory Commission (FERC), later told the Wall Street Journal that it was “the most significant incident of domestic terrorism involving the grid that has ever occurred.”

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Electrical Substations Articles