Session: Enabling Technologies for Energy Resiliency Parkville MicroGrid Antonio J. Matta Hartford, CT August 11, 2016

Concept Parkville MicroGrid Goal Hartford, CT has major power interruptions caused by storms resulting in loss of community services even with emergency generators Parkville cluster provides essential community services in one on-site and two off-site locations Services include: school, library, senior center, health center, grocery store and gasoline station Create a stand-alone MicroGrid that will link all services and through a fuel cell power source provide all of their electrical needs Goal

Interconnected Facilities – on site Parkville MicroGrid Interconnected Facilities – on site School Library Senior Center Health Center

Interconnected Facilities – off site Parkville MicroGrid Interconnected Facilities – off site Grocery Store Gasoline Station

Parkville MicroGrid Site Plan

Automatic Transfer Switch Automatic Transfer Switch Parkville MicroGrid Project Overview Normal Output Gas Station Utility Grid (CL&P) Normal Disconnect Switch Supermarket Automatic Transfer Switch Emergency Automatic Transfer Switch School Emergency Grid Islanding Output Context City of Hartford looking for a resilient power solution to serve critical community facilities that could act as a refuge for residents during emergencies or bad weather Results City of Hartford project consists of 800 kW baseload power with 640 kW of grid islanding capability to provide a community MicroGrid. Customer Value Constellation and Bloom Energy were able to provide a PPA to the City of Hartford that had significant cost savings, avoided upfront capital for passive backup equipment, and met sustainability objectives through Bloom’s energy solution

Parkville MicroGrid The “Players” City of Hartford, Department of Public Works – customer Weston and Sampson – customer’s energy consultant Bloom Energy – fuel cell design and construction Constellation – overall design and project management, fuel cell and MicroGrid site design / interconnect and construction / system owner GI Energy / Van Zelm Engineers / Environmental Systems Design – Constellation’s consultants Eversource – MicroGrid design, construction and operation Connecticut Natural Gas – design and construction of high pressure gas line Community Parkville School Senior Center Library Regulatory Committees Parkville Neighborhood Revitalization Zone Planning and Zoning Zoning Board of Appeals CT Siting Council

Parkville MicroGrid Financial Components DEEP MicroGrid Grant - $2,063,000 “Funding provided by a grant from the State of Connecticut administered by the Connecticut Department of Energy and Environmental Protection (DEEP)” City Financing (Municipal Bonds) - $1,300,000 Financial Incentives Low Emission Renewable Energy Credits (LRECs) Virtual Net Metering (VNM) Overall energy savings over current utility rates (projected) - $500,000

Key Development Activities Parkville MicroGrid Schedule EPC Contract Execution Permitting Approvals Detailed Design and Engineering Completed CT DEEP Grant Program Released EPC contract negotiation Initial engagement with local development companies and the City Development of the Project Bloom PPA signed System COO First 9 grant recipients awarded Construction Nov 2012 Jul 2013 Summer 2013 June 2015 Fall 2015 Dec 2015 Fall 2016 Dec 2016 Fall 2013 – June 2015 Key Development Activities Selection of generator technology: Initially CHP but lack of onsite heat load led to use of a Bloom fuel cell CT LREC bid submission and award: Bidding strategy required to ensure you are “picked up” while protecting project economics Virtual Net Metering: Site load under normal conditions @ 20% of fuel cell output required a structure to export excess energy that is only used by the MicroGrid during grid outages Securing Eversource engagement and sign-off: New model for all parties requiring a collaborative effort Ensure adequate pipeline gas pressure: Dedicated high pressure gas line for Bloom fuel cell provides extra reliability but greater upfront cost

Parkville MicroGrid Challenges and Results Challenges Results Economically viable (at or below current cost of electricity) LREC (Low Renewable Energy Credit) help to solve this problem along with VNM (Virtual Net Metering) DEEP Grant Technology selection: Very little thermal load resulted in switch from a traditional engine to a Bloom fuel cell Technical hurdles – Gas pressure, Bloom MicroGrid, spare UPM, VNM Many players involved – City, Eversource, CNG, Constellation, Bloom, Bloom/Constellation Coordination and ability to migrate through varied complexities A MicroGrid system that will help manage electricity costs and supply emergency power to a portion of the city’s Parkville neighborhood Connecticut’s first MicroGrid to be developed thorough a public-private effort One of the first MicroGrids to be developed under Connecticut’s Department of Energy & Environmental Protection (DEEP) MicroGrid Grant Program Proof that utilities, project developers, manufacturers, state and local government, and project owners CAN work together to make MicroGrids happen …

Parkville MicroGrid Construction Photographs Site clearing Underground Utilities Fuel Cell Operational

Contact Information Antonio J. Matta City Architect Hartford, CT tmatta@hartford.gov (860) 757-9982