Inspecting the power grid in hotter temperatures

It is always summer time somewhere in the world; and while the summer season is always welcome for all the joys and opportunities it presents, energy companies the world over have specific problems to deal with in hotter temperatures.

According to Robert Henley is Vice President of Energy Solutions at PrecisionHawk, utility services providers know they need to stay prepared for increased power demand and severe weather events – yet very few of these executives are confident that they are well-prepared to navigate weather challenges safely.  

As is the case everywhere in the world during the time, summertime heat is cresting in the US, at the same time many economic restrictions related to the COVID-19 pandemic are easing in communities.  Meanwhile, as extreme weather events are becoming more frequent, much of the country is on alert as forecasters predict severe hurricane, tornado, and wildfire seasons will continue.  

Min you, drones are important in fire-fighting too, as they have proved in past fire seasons in the USA, but we’d all rather there were zero wildfires if we could help it – not least because of the sheer volumes of lost property that would need to be replaced. Facing unprecedented conditions, including increasing and unpredictable demand, utilities should always be on high alert for overheating components along the power grid. 

Drones, helicopters, or ground inspection crews have been useful in this; with companies are collecting and analysing thermal imagery along their powerlines.  Leading utilities are incorporating innovative technologies, including AI-powered thermographic tagging engines, to identify hot spots before they fail or cause outages.  

By capturing thermal data and performing geospatial analysis, utility operations leaders are achieving an optimized workflow that mitigates risk, protects employees, and ensures customers receive uninterrupted service.  

The benefits of increasing efficiency in reviewing and identifying thermal issues extend beyond the hot summer months – no matter the climate or the weather, preventing important power components from overheating is crucial.  In doing so, utilities save resources and maintain system uptime. 

Transforming Data Collection With Thermal Sensors

Traditionally, utilities have relied on bucket trucks and manned aircraft to collect thermal data on hard-to-reach components. But that was the old way; now increasing numbers of field staff are flying drones equipped with thermal sensors to identify hot spots and other areas of critical concern.  

Utility crews continue to inspect equipment along the grid from the ground, but drone technology—note the drone in the upper left, being controlled by workers below—enables more accurate visual data. Courtesy: PrecisionHawk

Comparatively, drone inspections are more accurate, faster, and safer. They yield imagery and thermal data that is higher in resolution, owing to the aircraft’s ability to fly in close proximity to the assets. Where deploying a bucket truck can take up to a couple of hours, deploying a drone takes just a few minutes. Best of all, there is almost no risk of personal injury or death to the operator, who gets to keep his or her boots on the ground.     

The proof of these benefits is compelling. One major American utility recently used drones to identify 45 percent more areas of concern compared to traditional CVIs methods.

When Data Analysis Matters Most

It’s the data that matters most.  And forward-thinking utilities are expanding their data analysis methods to benefit from emerging machine-learning technology.  Drones and other collection methods are used to capture thermal images of electrical equipment.  Then, through the use of an analytics software program powered by artificial intelligence, utilities can automate anomaly reports and filter through the gathered thermal imagery to investigate items of concern on a power pole – connection points, insulators, transformers, splices, and other parts.  

Drone inspections of power grid transmission lines are growing in popularity thanks to increased safety, lower costs, and greater efficiency. Courtesy: PrecisionHawk

Implementing this type of software saves utilities time and money, reducing the noise (i.e., other hot objects in the vicinity) while simultaneously narrowing in on hotspots to review.  Instead of manually reviewing tens of thousands of thermal images to identify potential hotspots, a geospatial data platform can process the collected data quickly, accurately flagging images and then ranking them by severity.  

This allows a thermographer to review the images containing the most pressing issues first—increasing response times in scheduling work orders for immediate repair of hotspots, asset infrastructure, and more routine maintenance.

At an average of five images per pole and 300 poles per feeder, this adds up to significant savings for utilities, as the rate for a thermographer can average $30 per hour.    

Three Steps to Prevent Summer Overheating and Prepare for the Future

Beyond increased accuracy and safety, utilities are realizing cost savings by continuing to invest in emerging utility inspection technology. To do this, utilities are working to complete three steps to bolster against shifting summer demand, increasing extreme weather events, and heightened customer awareness and anxiety.

First, utilities are recognizing the benefits of adding drones to their data collection and analysis capacity.  By training linemen and other field staff, utilities are improving their asset inspection techniques, end-to-end.

Second, utilities are preparing to analyze and process thermal data, including through the use of machine-learning software programs able to identify potential failure areas and areas of concern.  Doing so allows utilities to address hot spots and other potential areas of concern immediately—before failure occurs.  

Finally, utilities are reconceptualizing internal workflows and preparing their capital budgets in order to respond to the enhancements realized by modernising and streamlining data collection through the investment in emerging AI-powered data analysis methods.  

Whether inspection methods already include drone-based data collection or a company is seeking to add drones to its data collection toolkit, utilities are benefitting from expanding their data collection and analysis methodologies, ultimately resulting in increased safety, cost savings, and fewer outages for customers due to summer overheating.  

Source: Powermag


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