Week 8 - How Drones are Restoring Power in Puerto Rico
- Sal Randazzo
- Feb 25, 2018
- 3 min read
Next week will be the start of March! I was unable to dedicate as much time to writing this week - we're currently bidding a $5M - $10M project for Berkeley County and as you can imagine, I'd like to be as accurate and tight on our proposal as possible. I've been dedicating a lot of my time and brain power to that proposal process. The design drawings have 184 sheets and the specification book is 850 pages - a lot of reading and estimating! Our proposal is due 6 March - if you're interested in this project as a potential subcontractor, please don't hesitate to contact me!
This week, I'd like to share a post with you guys from DroneLife - a blog that I follow that keeps me up-to-date with FAA Rules and Regulations, recent news and activity, along with some interesting articles relating to our industry. This article was written by Malek Murison - a freelance writer & editor for DroneLife.
Restoring power to mountainous areas once a hurricane has hit is a challenge. The terrain tends to add serious complications to any recovery operation, particularly when power lines run from peak to peak. According to Fast Company, Duke Energy has been using drone technology to reconnect remote parts of Ponce, Puerto Rico, in the aftermath of Hurricane Maria.
As reported in an article on Fast Company article, Duke Energy have traditionally used helicopters to deal with these types of scenarios, carrying cables from peak to peak – until a pilot was killed in an accident last year.
Drones offer an obvious alternative, without putting staff in danger. “The question was raised, is there another way to do this?” said the Manager of Unmanned Aerial Systems at Duke Energy, Jacob Velky. It looks like they’ve found one.
The system is pretty straightforward. A lightweight nylon cord is attached to the drone before it’s sent across the ravine with the cable in-tow. Once the drone reaches the assigned drop off point, it releases the cord. Workers on the ground can then fasten a second cord which allows them to pull the vital conductive wires into place.
It wouldn’t be possible without an ingenious 3D-printed electromagnet. This allows the pilot to drop off the cord with accuracy.
Duke Energy arrived in Puerto Rico last month. Crews spent six days in Ponce, using drones to reconnect power lines around the area.
“We were doing upwards of 3-4 pulls in a day,” Velky said. “There was no shortage of work.” And some of it was huge in terms of scale. One pull successfully linked up a power line across a 1,200-ft ravine.
It goes without saying that the Dukes Energy team were able to use drones to scout out damaged infrastructure, not just for repairs.
“Being in the jungle, once the conductor is off and you just have a wooden pole out in the tress, it’s very difficult to see where the pole is,” Velky said. “So using the drone to do reconnaissance instead of somebody going out there and walking around trying to find it just minimized the amount of time that employees are off-road.”
According to Duke Energy, power was back online for around 68% of customers in the area they were assigned when the team arrived in January. A little over a month later that number was up to 94%.
Overall it’s a huge success for drone technology and a great example of how UAVs can bring efficiencies, new levels of safety and conquer difficult environments.
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