The opportunity for microgrids in an AI-powered future

We are living in an age fuelled by data, and with this, growth in data centre energy demand. Driven by power-hungry AI applications, could microgrids be a solution? 

A request made through ChatGPT consumes 10 times the electricity of a Google Search, according to the International Energy Agency (IEA). With a power grid already under stress, the industry will need to rethink the way it adapts to these challenges.

With the rise of AI and expectation of what it can deliver, the next few years will see a significant rise in the number and size of data centres, with companies like Google pouring billions into new data centre investment.

This all has serious consequences for the energy sector at a time when technology firms are under growing pressure to make data centres energy efficient and sustainable.

Microgrids – or virtual power plants (VPP) – could be the answer in providing a more efficient energy supply for data centres. While the concept of a microgrid can vary depending on how they are used, they can be defined as small-scale, localised electrical grids that operate independently or in conjunction with the main power grid. They range in size from a campus to a home. 

As a global industry alliance, we are seeing them used in some interesting scenarios, from residential to large campuses like Apple in the Silicon Valley. One interesting example is California Community Choice Aggregator, MCE, which has established a standardised setup for residential VPPs with OpenADR used as the utility connection to manage pricing and consumption.

It's intended to serve as a model to help homebuyers at every income level access clean, all-electric technology for their homes, helping participants save money with clean energy technologies and receive monthly credits on energy bills. In exchange, they allow their smart energy devices to respond to MCE's signals to shift load based on the grid's needs. This includes reducing energy use during more expensive times of the day, sending energy back to the grid when needed, and reducing grid strain when weather events threaten outages.

The feasibility and suitability of microgrids depends very much on factors like the specific requirements of the data centre itself and regulatory environment.

The advantages are in helping overcome grid constraints and improving reliability by managing consumption and maintaining power during grid issues. For data centres that require uninterrupted operation, this ability to deliver resilience is critical. 

Sustainability is another one. By integrating renewable energy sources, such as solar, microgrids can help reduce carbon footprint. They can also reduce operational costs by utilising local power generation and demand-response strategies, and when it comes to regulation, they face fewer regulatory hurdles compared to other options, like nuclear power facilities, because they operate mostly 'net zero' on the grid connection.

But for data centre operators and investors trying to address power supply and stability issues, the use of microgrids can also mean challenges. 

This begins with start-up costs. While we talk about a reduction in operational costs once up and running, set-up costs for microgrids can be high, requiring significant capital investment especially for larger data centres, so important to bear in mind. 

Sustainability may be a big plus point, but the use of renewables like solar and wind depend on the weather – and the weather can be fickle. This necessitates robust storage solutions, backup power or large grid connections to ensure reliability and stability at all times. 

It's also important to stress that the effective integration of these various distributed energy sources and systems can be technically challenging, so working with good integrators and partners is paramount. 

When it comes to powering data centres, microgrids are not the only option. Alternatives like small modular nuclear reactors (SMRs) are also be touted as potential power sources. 

The fact is that the data centres of the future will need a very high continuous supply of power and microgrids offer options for a more resilient and responsive energy infrastructure. 

Decentralised power through a network of microgrids could help dynamically manage power loads and optimise renewable energy sources, especially as demands on the grid continue to grow in an AI-powered future.