,Dark clouds hover over Tower Bridge in central London. The UK’s National Grid ESO is teaming up with nonprofit Open Climate Fix to design a tracking system that matches cloud movements with the exact locations of solar panels. — AFP
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The UK is turning to artificial intelligence to better predict when clouds affect its generation of solar energy, potentially helping to reduce its reliance on fossil fuels as a backup power source.
The country’s National Grid ESO is teaming up with nonprofit Open Climate Fix to design a tracking system that matches cloud movements with the exact locations of solar panels. The tool seeks to provide much greater precision than current weather forecasts.
ESO is responsible for maintaining the balance of supply and demand on the UK’s electric grid, down to the second. That was relatively straightforward when all its energy was coming from coal, gas and nuclear power plants. But with solar and wind turbines, a shift in the breeze or a passing cloud can lead to a dramatic shift in supply.
To account for that risk, the grid operator still relies on fossil-fuel power plants that are running in the background and can step in at a moment’s notice. Companies operating those facilities, which mostly burn gas, get paid for being on standby whether or not they end up sending power to the grid – with consumers paying the price.
“If you’re more confident in your forecast, then you don’t need to have as big of a buffer,” said Carolina Tortora, head of innovation strategy and digital transformation at National Grid ESO. “There are a million other issues, but this is a big one.”
Solar power is particularly tricky to manage. Right now, ESO doesn’t even know where all of the nation’s solar panels are. While some are in large arrays that are easy to locate, many others are affixed to rooftops all across the country. Even with a perfect understanding of the clouds, it would still be difficult to predict exact power supply. That’s why ESO also has a project underway to map out the UK’s solar resources.
When it comes to predicting the weather, forecasts of the sun have traditionally covered only broader areas. Open Climate Fix will use machine learning to analyse satellite imagery and pinpoint if expected cloud movements will shade specific solar panels.
If all goes to plan, the data will be available to the grid’s control room operators in about six months, Tortora said. That added insight will give ESO greater confidence in real-time power supply, allowing the company to cut down on fossil fuel reserves and have time to turn on other power sources such as batteries. – Bloomberg