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Thursday 24 August 2017
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Nanogrids, Microgrids, and Big Data: The Future of the Power Grid

Report: Rakesh Sinha
Published : Wednesday 09 August, 2017 09:40 PM
Nanogrids, Microgrids, and Big Data: The Future of the Power Grid

Developing technology is like driving a race car: You push the machinery as fast as it’ll go, and if you can avoid a crash, a prize awaits you at the finish line. For engineers, the reward is sometimes monetary, but more often it’s the satisfaction of seeing the world become a better place.

Thanks to many such engineers driving many such race cars, a lot of progress is about to happen in an unexpected spot: the electricity sector. The power grid’s interlocking technological, economic, and regulatory underpinnings were established about a century ago and have undergone only minimal disruption in the decades since. But now the industry is facing massive change.

Most observers are only vaguely aware of the magnitude of this overhaul, perhaps because it’s a hard story to tell. It doesn’t translate well to a set of tweets. Many people have come to think of the electric-utility business in much the same way they think of their taxes—boring, tedious, and somehow, always costing more money.

What’s happening in this industry stems from technology improvements, economic forces, and evolving public priorities. As the changes dig away at the very foundation of the electricity sector, the results are likely to be anything but boring. Yet they may well cost you more money.

For about a century, affordable electrification has been based on economies of scale, with large generating plants producing hundreds or thousands of megawatts of power, which is sent to distant users through a transmission and distribution grid. Today, many developments are complicating that simple model.

At the top of the list is the availability of low-cost natural gas and solar power. Generators based on these resources can be built much closer to customers. So we are now in the early stages of an expansion of distributed generation, which is already lessening the need for costly long-distance transmission. That, in turn, is making those new sources cost competitive with giant legacy power plants.

Distributed generation has long been technically possible. What’s new now is that we are nearing a tipping point, beyond which, for many applications, distributed generation will be the least costly way to provide electricity.

While it certainly helps, the declining cost of renewables and gas-fired electricity is not all that’s spurring this change. To be competitive, the entire distributed system will have to work well as a whole. Quite a few technological advances are coming together to make that possible: advanced control systems; more compact, smarter, and efficient electrical inverters; smart electricity meters and the burgeoning Internet of Things; and the ever-growing ability to extract actionable information from big data.

 

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