NERC develops and enforces Reliability Standards, annually assesses seasonal and long-term reliability, monitors the bulk power system through system awareness, operates the Electricity Information Sharing and Analysis Center (E-ISAC) and educates, trains and certifies industry personnel. Normal everyday operations of the system are the responsibility of utility owners and operators.
Currently, a significant reliability threat to the U.S. grid is associated with squirrels and balloons, and not religiously inspired terrorists. However – and more applicable to grid operators – we have recently seen noteworthy interest in disabling or destroying critical infrastructure. Coordinated attacks can target the grid, and an attack by a disgruntled former employee, ideologically motivated activist, or a criminal stumbling across a “soft target,” could inflict significant damage. With an interconnected grid of over 450,000 miles of high voltage transmission lines (100 kV and higher) and over 55,000 substations (100 kV and larger), the targets of opportunity are endless.
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× According to the Department of Energy, the number-one cause of most power outages in the U.S. is bad weather, which costs the economy between $18 billion and $33 billion every year in lost output and wages, spoiled inventory, delayed production and damage to grid infrastructure.
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| The number-one cause of most power outages in the U.S. is bad weather, which costs the economy between $18 billion and $33 billion every year |
Large power transformers
A large power transformer (LPT) is an enormous, custom-built piece of equipment tailored to customers’ specifications. They usually are not interchangeable with each other, and they are not produced for spare-part inventories; so if one blows, a lot of companies and homes could be without power for more than six months. They are not cheap, either. According to EEP (Electrical Engineering Portal), $10 million is a fairly average cost, but that doesn’t include transporting the gargantuan piece of equipment or installing it, which usually adds an additional 35 percent to the bill.
Protecting power grids is essential to deliver electricity that serves millions of consumers. Transmission substations are a component of the power infrastructure that presents unique security challenges. These important facilities often sit out in the open, in remote locations, and were historically protected by little more than cameras or chain-link fences.
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| According to EEP, $10 million is a fairly average cost for a large power transformer |
NERC/CIP guidelines
The North American Electric Reliability Corporation’s Critical Infrastructure Protection (NERC/CIP) guidelines address security needs of electrical substations. Every facility has a baseline requirement for perimeter security protection around the site, although medium- and high-impact sites will have more stringent requirements. The geography surrounding sites – Is it an urban area or rural? Does the surrounding elevation provide additional lines of sight? – also impacts the types of systems they require.
Electricity coming from coal, nuclear or hydroelectric plants goes to local utilities
The U.S. power grid is divided into three sections: The Eastern Interconnection for states east of the Rocky Mountains, The Western Interconnection for states from the Pacific Ocean to the Rocky Mountains, and the smallest—the Texas Interconnected system—covering most of Texas. Electricity coming from coal, nuclear or hydroelectric plants goes to local utilities and they distribute power to homes and businesses, to millions of personal devices, lights, refrigeration, computers, and to other “loads,” that tap it.
Inherited challenges
According to the American Society of Civil Engineers (ASCE), the nation’s electric infrastructure is “nothing but a patchwork system” that has evolved wildly since the first substation was erected by Thomas Edison in 1882, on New York City’s Pearl Street.
Contributing to the challenges of securing the grid are the crazily disparate ages and capacities of the grid’s equipment.
There are many possible targets, too. Approximately 300 control centers around the country monitor voltage and watch the data from SCADA (supervisory control and data acquisition) systems, which are placed at transformers, generators and other critical areas. Ideally, this allows engineers to monitor the data for signs of trouble and then communicate with each other to deal with whatever is happening to the grid, but SCADA has cybersecurity issues.
