Dual-Arm Robots Cut Power Line Risk
New dual-arm robots for high-voltage power line maintenance promise to reduce human risk by 90%, addressing the cause of 80% of U.S. power outages. The robotic systems can perform complex repairs and maintenance tasks that currently put electrical workers in extreme danger.
The job of an electrical power-line installer and repairer has a fatal work injury rate of 23.7 per 100,000 workers. Contact with overhead power lines is a leading cause of these electrical fatalities. For every 100,000 linemen, approximately 2,400 suffer serious non-fatal injuries, most commonly electrical burns and broken bones from falls. Storm recovery work is one of the most dangerous aspects of the job. After events like hurricanes, crews face unfamiliar working conditions, fatigue, and unstable grounding, which increases the risk of accidents. In September 2021, two linemen died while restoring power in Alabama after Hurricane Ida. Beyond direct contact with power lines, other hazards for linemen include falls from heights and exposure to hazardous materials. The construction industry, which includes power line work, accounts for 44% of all job-related fatalities in the U.S. The majority of power outages, 83% in fact, are related to severe weather such as high winds, lightning, and ice storms that damage lines and equipment. Other significant causes include animals interfering with equipment, vehicle accidents involving utility poles, and equipment failure due to the aging U.S. power grid. The dual-arm robots are part of a broader shift towards automation in the utility industry to improve grid reliability and worker safety. These robotic systems can be deployed to perform inspections and maintenance in high-voltage environments that are too risky for human workers. These robots often feature two arms for stability and to perform complex tasks, and they can move along power lines to conduct inspections. Some systems are deployed by drones, which fly the robot up to the line, allow it to attach, and then detach to let the robot perform its work. The technology is not limited to repairs; it's also crucial for predictive maintenance. By using robots and drones equipped with sensors and thermal imaging, utilities can detect potential failures, like overheating components, before they cause an outage. This shift to proactive maintenance helps prevent costly downtime and enhances grid resilience.
