Originally published on Smart Grid Library
This week’s guest authors are Christina Briggs, Economic Development Manager for the City of Fremont, California, and Vipul Gore, President and CEO of Gridscape Solutions. The microgrid solution described here points to the benefits of collaborative planning and development to build resiliency for critical infrastructure and contribute to the goals of a truly Smart City.
Cities have a significant opportunity to lead by example when it comes to innovative energy solutions. But the pot sweetens even more when sustainable energy decisions also contribute to a City’s economic development strategy. In the case of Fremont, where clean technology is considered one of its largest industry clusters, public-private partnerships can promote the testing of new technology, help its local companies scale, and identify potential sustainability measures for City operations. Here’s how Fremont and Gridscape Solutions are crafting win-win scenarios.
The City of Fremont and Gridscape Solutions are teaming up to pursue a California Energy Commission (CEC) Electric Program Investment Charge (EPIC) opportunity. This state program funds technology demonstrations of reliably integrating energy efficient demand-side resources, distributed clean energy generation and smart grid components to protect and enable energy-smart critical facilities. This follows on a previously successful collaborative effort where Gridscape Solutions assembled a consortium of partners for a city EV charging infrastructure project, including the Fremont Chamber of Commerce, Prologis, Delta Products, and the City of Fremont.
The proposed project consists of deploying a microgrid at three fire stations within the City of Fremont. The close proximity of Hayward Fault line to these Fire Stations, the maximum load capacity on the transmission line, and the need to reduce grid dependency satisfy the most important grant requirements of providing energy savings, increasing electrical infrastructure resiliency, reducing carbon dioxide emissions and demonstrating islanding from the grid for up to three hours. Using the combination of renewable generation and battery technologies, the microgrid project could save the City of Fremont approximately $10,440 per each fire station and reduce CO2 emissions by 22,176 pounds per station per year.
The proposed microgrid design will provide at least three hours a day of power to the fire station in the event of a utility outage. The microgrid is also capable of responding to signals to proactively and seamlessly disconnect from the grid by using state-of-the-art microgrid controls, and advanced load controls. The implementation of the microgrid also serves to balance PV generation supply, efficient energy storage and campus loads to achieve the City of Fremont’s net zero energy goals by maximizing PV electrical energy usage behind the meter. During a utility outage, the power distribution may be isolated from the utility at the point of service by a microgrid inter-tie protection relay.
The primary goals of the project are:
- Island for up to three hours by disconnecting from grid
- Reduce energy costs and CO2 emissions
- Improve resiliency and reliability of fire station infrastructure using microgrid
- Deliver the highest value to ratepayers and the utility by optimal configuration
- Demonstrate innovation and environmental stewardship through the deployment of energy usage dashboards to the City of Fremont or CEC systems.
The priority status cities place on these facilities, combined with the tremendous innovation and market opportunity for companies in this space creates a win-win scenario. When cities leverage industry expertise in their own backyards, society stands to benefit.