What is a digital twin? Is it just a fancy name for modeling? And why do many senior leaders and engineers at power transmission & distribution (T&D) companies have a gnawing feeling they should have one?
But ultimately, it comes down to one question: Is this a trend worth our time and money?
The short answer to that one is: yes if approached intelligently and accounting for utilities’ specific needs. This is no case of runaway hype or an overwrought name for an underwhelming development – digital twin technology can be genuinely transformational if done right. So – here are six reasons why no T&D utility will want to be without a digital twin in five years.
Smarter asset planning
A digital twin is a real-time digital counterpart of a utility’s real-world grid. It is the repository to collect and index all network data, from images to 3D point clouds to past reports and analyses. A proper digital twin – and not just a static 3D model of some adjacent assets – represents the grid in as much detail as possible, is updated in real-time, and can be used to model ‘what if’ scenarios to gauge the effects in real life.
With that in mind, an obvious use-case for a digital twin is planning upgrades and expansions. For example, if a developer wants to connect a major solar generation asset, what effect might that have on the grid assets, and will they need upgrading or reinforcement? A seasoned engineer can offer an educated prediction if they are familiar with the local assets, their age, and their condition – but with a digital twin, they can model the scenario on the digital twin and find out.
The decision is more likely to be the right one. The utility is less likely to be blindsided by unforeseen complications, and less time and money need to be spent visiting the site and validating information.
As the energy transition accelerates, both transmission and distribution (T&D) utilities will receive more connection requests for anything from solar parks to electric vehicle charging infrastructure to heat pumps and batteries – and all this on top of normal grid upgrade programs. A well-constructed digital twin may come to be an essential tool to keep up with the pace of change.
Improved inspection and maintenance
Utilities spend enormous amounts of time and money on asset inspection and maintenance – they have to meet their operational and safety responsibilities. To make the task more manageable, most utilities try to prioritize the most critical or fragile parts of the network for inspection, based on past inspection data and engineers’ experience. Many are investigating how to collect better, store and analyze data to hone this process, with the ultimate goal of predicting where inspections and maintenance are needed before problems arise.
The digital twin is the platform that contextualizes this information. Data is tagged to assets in the model, analytics and AI algorithms are applied, and suggested interventions are automatically flagged to the human user, who can understand the problem thanks to the twin. As new data is collected over time, the process only becomes more effective.
More efficient vegetation management
Utilities – especially transmission utilities in areas of high wildfire risk – are constantly struggling with nature to keep vegetation in check that surrounds power lines and other assets. Failure risks outages, damage to assets, and even a fire threat.
A comprehensive digital twin won’t just incorporate the grid assets – a network of powerlines and pylons isolated on an otherwise blank screen – but the immediate surroundings. This means local houses, roads, waterways, and trees.
If the twin is enriched with vegetation data on factors such as the species, growth rate, and health of a tree, then the utility can use it to assess the risk from any given twig or branch neighboring one of its assets and prioritize and dispatch vegetation management crews accordingly.
A with expansion planning, inspection, and maintenance, the value here is less labor-intensive and more cost-effective decision making and planning – essential in an industry of tight margins and constrained resources. What’s more, the value only rises over time as feedback allows the utility to finesse the program.
Automated powerline inspection
Remember, though, that a digital twin must be kept up to date to be maximally useful. A larger utility might Blanche at the resources required to map and inspect the network once to build the twin and update that twin at regular intervals.
However, digital twins are also an enabling technology for another technological step-change – automated powerline inspection.
Imagine a fleet of sensor-equipped drones empowered to fly the lines almost constantly, returning (automatically) only to recharge their batteries. Not only would such a set-up be far cheaper to operate than a comparable fleet of human inspectors, but it could also provide far more detail at far more regular intervals, facilitating all the above benefits of better planning, inspection, maintenance, and vegetation management. Human inspectors could be reserved for non-routine interventions that really require their hard-earned expertise.
In this scenario, the digital twin provides the ‘map’ by which the drone can plan a route and navigate itself in conjunction with its sensors.
Improved emergency modeling and faster response
If the worst happens and emergency strikes, such as a wildfire or natural disaster, digital twins can again prove invaluable. The intricate, detailed understanding of the grid, assets, and surroundings that a digital twin gives is an element of order in a chaotic situation and can guide the utility and emergency services alike in mounting an informed response.
And – once again, the digital twin’s facility for ‘what-if’ scenario testing is beneficial for emergency preparedness. If a hurricane strikes at point X, what will affect assets at point Y? If a downed pylon sparks fire at point A, what residences are nearby, and what does an evacuation plan look like?
Easier accommodation of external stakeholders
Finally, a digital twin can do lighter work of engaging with external stakeholders. The world doesn’t stand still, and a once blissfully isolated powerline may suddenly find itself adjacent to a building site for a new building or road.
As well as planning for connection (see point 1), a digital twin takes the pain out of those processes that require interfacing with external stakeholders, such as maintenance contractors, arborists, trimming crews, or local government agencies – the digital twin breaks down the silos between these groups and allows them to work from a single version of the truth – in future, it could even be used as part of the bid process for contractors.
These six reasons why digital twins will be indispensable to power T&D utilities are only the tip of the iceberg; the possibilities are endless given the constant advancement of data collection and analysis technology. No doubt these will invite even more questions – and we relish the challenge of answering them.
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