This series of articles explores both grid scale and behind-the-meter (BTM) grid optimization strategies and the implications for our customers. The first article in the series set the stage by providing the regulatory framework and outlining the delivery framework being implemented to enable 150 megawatts (MW) of both grid-scale and behind-the-meter demand assets over the next three years in Eversource’s Massachusetts service territory.
Battery storage is often described as the “killer app” for the grid due to its versatility and ability to provide multiple services. This second article describes how utilities can re-program that “killer app” of storage to reduce costs for customers and reduce emissions. Future articles in this series will explore the technology, processes, and customer facing aspects of successful distributed energy resource programs. The last article in this series will offer a glimpse of how behind-the-meter and front-of-the-meter assets come together in the grid of the future.
Utility-scale storage
for utilities to consider both utility-scale and behind-the-meter (i.e. customer-sited) storage. In Massachusetts, Eversource has already received approval for two utility-scale storage projects. The first project is located on Cape Cod: a 25-MW/38-MWh project that will provide increased reliability and resiliency for the Outer Cape communities of Provincetown, North Truro, Truro and Wellfleet. The second project is a 4.9-MW/20-MWh system located on the island of Martha’s Vineyard. This battery system will reduce greenhouse gas emissions created by diesel-fired generators during times of high energy demand. These projects will be beneficial for customers by lowering costs by avoiding traditional investments, increasing reliability, allowing for additional renewable generation, and reducing emissions by decreasing the need to run older expensive, dirty fossil fuel generation during peak times.
Behind-the-meter storage
In addition to utility-scale storage, utilities should consider customer-sited storage as well. Future articles in this series will discuss the synergistic effects of coupling utility-sited storage with customer-sited storage. Eversource expects to help deploy over 20 MW of customer-owned and sited storage that can potentially enhance grid operations. Taking a holistic approach to analyzing storage and which type of technology is best suited for each customer allows for a more customized approach to storage. For instance, lithium ion batteries may be a good fit for certain facilities that see temporary spikes in energy use from air conditioning or process loads. However, thermal storage, such as ice storage or phase change material, may be a better solution for a customer with cold storage or a food processing facility.
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