What we're learning from Europe's first campus-wide microgrid (think cogen)

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Quick Take:  Europe's first campus-wide microgrid is up and running at the University of Genoa's Savona location. Like its American counterparts, it integrates renewables and energy storage. But it also includes co-generation units. Although co-generating power, heat and cooling just can't seem to reach a tipping point in America, it is far more common in Europe.

 

As you will read, Europe does share at least one challenge with the U.S. -- regulations that are not keeping up with technology. – Jesse Berst

 

Microgrid at Italian university generates savings, knowledge

Autonomy and flexibility can support energy resilience, while also benefitting the power grid. This February, the Savona campus of the University of Genoa, Italy, opened a campus-wide microgrid -- the first of its kind in Europe. It combines both electrical and thermal energy resources, as well as thermal and battery storage. All of this technology is orchestrated by a state-of-the-art microgrid management system.

 

Currently the Savona microgrid encompasses sufficient resources to supply about half of the campus' current energy needs -- and it was designed to accommodate additional resources to eventually power the campus fully.

 

Integration of renewable (rooftop photovoltaic and concentrating solar generation) and traditional power generation sources is a key aspect of this project. This microgrid also is distinguished by the combination of electrical and thermal energy. It also includes two newly installed cogeneration units, and small gas turbine originally on the campus was incorporated as well.

 

Other integrated equipment includes electrochemical battery storage, two existing boilers, and an absorption chiller. There are also two electric vehicle charging units.

 

The total electrical power installed is equal to about -250 kWe plus 140 kWh of available storage capacity. All additional energy is supplied by the national power grid.

 

The university’s Power Systems Research Team (more than 10 researchers representing various engineering disciplines) led this project, in collaboration with Siemens (the primary contractor) and other industry and power grid partners.

 

How the Savona microgrid works

The heart of this microgrid is a control system featuring the Siemens Microgrid Manager. It includes an electrical SCADA, a thermal SCADA and a centralized energy management system for the microgrid. Together these systems receive signals and data from the field and communicate with installed devices, through a gateway that uses both wired and wireless connections.

Benefits on campus and beyond

The Savona microgrid will cut campus energy costs by an estimated $67,200 per year, reduce carbon dioxide emissions by about 120 tons annually, improve operational efficiency, and demonstrate effective control systems and strategies.

 

But beyond that, this project is yielding considerable benefits outside the Savona campus — by serving as a test bed for innovative microgrid energy management strategies.

 

Delfino observed that that siting this microgrid project at an engineering research university is vastly increasing the knowledge base and data about microgrids.

 

"This microgrid is a test bed for ongoing research, and it's getting a lot of attention." said Delfino. "Every week we get e-mails and visits from faculty and engineers from all over Europe. Also, everything we're learning here can be applied in the context of a smart city."

 

Theoretically, the Savona microgrid also can benefit the national grid. "We are ready to exchange data and information with the national grid, as well as receive dispatching commands from the grid control center. This will allow us to involve on-campus microgeneration in ancillary services to Italy's energy market," said Delfino.

 

What's next for the Savona microgrid?

Regulatory hurdles to realizing this vision are being addressed. "What is currently missing in Italy is a set of regulations to clarify how the national grid can benefit from the microgrid," said Guenzi. "Italian regulators are working on this. We're expecting new rules during the next regulatory period, probably in 2015. This should allow the microgrid to provide full benefits to the national grid.

 

Currently no campus buildings are directly connected to the microgrid. However, the university recently issued a new public tender to connect a new campus building to the microgrid. This will help with the exploration of extended microgrid strategies for load management.

 

Learn more about the Savona microgrid in this archived IEEE Spectrum webinar. (Registration required)

 

Jesse Berst is the founder and Chief Analyst of SGN and Chairman of the Smart Cities Council, an industry coalition.

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