Terrorism and the Electric Power Delivery System

Electrical grid is said to be vulnerable to terrorist attack. I can agree that electrical power distribution network would be quite vulnerable if someone tries to sabotage it and knows what to do. I know this because I design software and hardware for control systems for electrical companies.

Some days ago I saw in Finnish television an interesting documentary Suomi polvilleen 15 minuutissa (viewable on Yle Areena at least for Finnish people still for few weeks). It says that in Finland there has been debate on how many weeks the army could protect the country against potential attacks. The document says that the country could collapse in 15 minutes if some outside attacker or a small terrorist group would attack to certain key point in power network. Practically nothing would work anymore without power and it will take quite bit of time to get replacement parts for some key component. There are not too many spare parts and it it take months or a year to build a new big high voltage distribution transformer.

This vulnerability would hold to practically all developed countries. I have understood that Finnish electrical power distribution network would be in pretty good condition compared to electrical power networks on some other countries. I think that in many countries could quite easily cause huge problems by damaging some key points on power distribution network. Those attacks could be either cyber-attacks or attacks or damaging physical infrastructure.


In USA there has been lots of talk lately about electrical grid vulnerability to terrorist attack. There are warnings like this: Cyber-terrorists could target the U.S. electrical grid and throw the nation into chaos. And there is indeed some truth on those because this critical infrastructure is vital to a country’s economy and security, not a new target for terrorist groups (there have been documented incidents since the 1970s), inherently vulnerable (economical and practical reasons) and extremely hard to protect well. The electric power delivery system that carries electricity from large central generators to customers could be severely damaged by a small number of well-informed attackers. The system is inherently vulnerable because transmission lines may span hundreds of miles. Electrical infrastructure is not necessarily a new target for terrorist groups- there have been documented incidents since the 1970s.

New York Times writes that Terrorists could black out large segments of the United States for weeks or months by attacking the power grid and damaging hard-to-replace components that are crucial to making it work. By blowing up substations or transmission lines with explosives or by firing projectiles at them from a distance, the report said, terrorists could cause cascading failures and damage parts that would take months to repair or replace.

Remember the fact that causing large scale problems for long time is usually hard. In Debunking Theories of a Terrorist Power Grab article a Penn State power-system expert cites laws of physics to pull the plug on worries that a terrorist attack on a minor substation could bring down the entire U.S. electric grid. The most vulnerable points are the ones that have the most energy flowing through them — like huge power stations or highly connected transformers. Those are the ones that should be well protected well and there should not be too much worrying on protecting smaller transformers.

Here are few links to articles for more information:

There is also a free book Terrorism and the Electric Power Delivery System on-line covering those topics. Check it out if you want to learn more. It gives you much more background than those articles.


  1. Tomi Engdahl says:

    Puerto Rico governor: Power could be out for months

    (CNN)Puerto Rico’s energy grid took such a severe blow from deadly Hurricane Maria that restoring power to everyone may take months, Gov. Ricardo Rosselló told CNN on Wednesday night.
    The entire system is down, the governor said. No one on the island has power from utilities.

    Puerto Rico, which has been through a long recession and is deeply in debt, has a power grid that is “a little bit old, mishandled and weak,” Rosselló told “Anderson Cooper 360˚.”
    “It depends on the damage to the infrastruacture,” he said. “I’m afraid it’s probably going to be severe. If it is … we’re looking at months as opposed to weeks or days.”

  2. Tomi Engdahl says:

    DDoS Attacks More Likely to Hit Critical Infrastructure Than APTs: Europol

    While critical infrastructure has been targeted by sophisticated threat actors, attacks that rely on commonly available and easy-to-use tools are more likely to occur, said Europol in its 2017 Internet Organised Crime Threat Assessment (IOCTA).

    The report covers a wide range of topics, including cyber-dependent crime, online child exploitation, payment fraud, criminal markets, the convergence of cyber and terrorism, cross-cutting crime factors, and the geographical distribution of cybercrime. According to the police agency, we’re seeing a “global epidemic” in ransomware attacks.

    When it comes to critical infrastructure attacks, Europol pointed out that the focus is often on the worst case scenario – sophisticated state-sponsored actors targeting supervisory control and data acquisition (SCADA) and other industrial control systems (ICS) in power plants and heavy industry organizations.

    However, these are not the most likely and most common types of attacks – at least not from a law enforcement perspective as they are more likely to be considered threats to national security. More likely attacks, based on reports received by law enforcement agencies in Europe, are ones that don’t require attackers to breach isolated networks, such as distributed denial-of-service (DDoS) attacks, which often rely on easy-to-use and widely available tools known as booters or stressers.

    While these types of attacks may not lead to a shutdown of the power grid, they can still cause serious disruptions to important utilities and services.

    “While DDoS is often a tool for extortion, the lack of communication from the attackers may suggest that these attacks were of an ideological nature,” Europol said in its report. “Although European law enforcement recorded an increasing number of these attacks last year, they also note that they only had moderate, short-lived impact.”

    Internet Organised Crime Threat Assessment (IOCTA) 2017

  3. Tomi Engdahl says:

    Home> Power-management Design Center > How To Article
    Hurricane hardening for utility power architectures: Puerto Rico

    In the aftermath of Hurricane Maria, the island of Puerto Rico has been devastated with a loss of their electrical power infrastructure and lack of fresh water. The electrical infrastructure efforts are estimated to bring power back to the island in six months.

    The Puerto Rico Electric Power Authority (PREPA) is the only power distributor on the island. PREPA’s power plants were 44 years old when Hurricane Maria struck; most industry power plants average 18 years. They burned Venezuelan oil at these aging power plants which needed billions of dollars in overdue repairs and renovation. Puerto Rico being essentially bankrupt did not help. This is a lesson for other governments to make sure their citizens are well protected for typical catastrophes that occur in their region.

  4. Tomi Engdahl says:

    NASA Images of Puerto Rico Reveal How Maria Wiped Out Power On the Island

    Hurricane Maria was the most devastating hurricane to make land in Puerto Rico in nearly 100 years and the country is still reeling in its wake. Much of the island still doesn’t have running water, reliable communication or electricity. Recently, NASA published a set of date-processed photos that show the island’s nighttime lights both before and after the storm.

    These NASA Images Of Puerto Rico’s Power Loss Are Staggering

  5. Tomi Engdahl says:

    Hurricane Maria Left Puerto Rico Absolutely Devastated

    Hurricane Irma pounded Puerto Rico earlier this month, leaving hundreds of thousands without power, but narrowly avoiding a worse-case scenario.

    Unfortunately, Hurricane Maria slammed directly into Puerto Rico at Category 4 strength on Wednesday, lashing the island with 155 mile per hour (250 kilometer per hour) winds and double-digit storm surge. The storm immediately knocked out the region’s entire power grid, much of its communications networks and large stretches of road, making it impossible for the territory’s central government to assess the damage.

    But the scale of the second hurricane’s devastation across Puerto Rico is rapidly becoming clear, the Washington Post reports, with many towns across the territory totally destroyed.


  6. Tomi Engdahl says:

    Part II: Powering America: Defining Reliability in a Transforming Electricity Industry

  7. Tomi Engdahl says:

    How Do South Korea’s Secretive “Blackout Bombs” Actually Work?

    IFLScience logo
    How Do South Korea’s Secretive “Blackout Bombs” Actually Work?
    How Do South Korea’s Secretive ‘Blackout Bombs’ Actually Work?
    These non-leathal weapons are still somewhat under wraps. Josemaria Toscano/Shutterstock

    10 OCT 2017, 11:51
    As tensions across the Korean peninsula continue to simmer, reports are now circulating that South Korea’s military forces are prepared to use so-called blackout bombs in any future conflict. These high-tech weapons have only been used a handful of occasions before – most notably during the last two Gulf Wars and during the conflict in Kosovo – so what exactly are they?

    Classified until only recently, these weapons are decidedly non-lethal. They contain millions of small particles of chemically treated carbon filaments, essentially a type of graphite.

    these bombs are targeted at major power grids and lines: when these particles make contact, a current flows through them at such extreme temperatures that it melts part of the mainline wiring, and the system shorts out. So long as the power lines aren’t insulated, these graphite bombs can be incredibly effective.

    When they were first deployed in the 1990 Gulf War against Iraq by the US Air Force, up to 85 percent of the country’s electrical supply was knocked out. Similarly, when used by NATO forces against Serbia in 1999, 70 percent of the country’s power grid was shut down.

    South Korea’s Agency for Defence Development has been working on them recently, and has, according to Yonhap News Agency


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