Snohomish PUD nets state grant, will build energy storage system

Snohomish County Public Utility District (Snohomish PUD) will receive $7.3 million in matching funds from the Washington Clean Energy Fund. Using the funding, announced this week by Washington Governor Jay Inslee, the PUD will implement a comprehensive program of energy storage and controls integration.

The PUD and its principal partner, 1Energy Systems, a Seattle-based company, are building the energy storage systems based on the Modular Energy Storage Architecture (MESA), which provides a standard, non-proprietary and scalable approach to energy storage.

The PUD’s energy storage program, which forges partnerships with major U.S. and international business partners, will include two large-scale lithium ion batteries, one built by LG Chem and a second by Mitsubishi-GS Yuasa.

Both lithium ion batteries will use a Parker Hannifin Power Conversion System. Additionally, the PUD will deploy multiple advanced vanadium flow batteries, which will be built by UniEnergy Technologies, based in Mukilteo, Wash.

Building on these elements, the PUD will deploy an integrated, scalable, optimized control system to manage the energy storage systems (ESS) in an automated fashion. Within each energy storage system, monitoring and control will be provided by the 1Energy Intelligent Controller (1E-IC), software that also securely connects each energy storage system with utility control, scheduling and optimization platforms.

MESA Project Goals

Key goals of the MESA project include:

“-          Developing standard electrical and communication interfaces to connect batteries, power converters and software components into modular energy storage systems

“-          Helping to foster an industry ecosystem of modular energy storage component suppliers. By sharing their learning with other electric utilities and technology suppliers, MESA Project partners are advancing a new, component-based approach to energy storage that gives electric utilities more choice, and enables battery, power converter and software manufacturers to reach more customers while focusing on their core competencies.

Project Partners

“-          1Energy Systems, principal partner and architect of MESA and the 1Energy Intelligent Controller (1E-IC) to manage the energy storage systems in an automated fashion

“-          Alstom Grid, supplier of the PUD’s EMS, SCADA & DMS platforms

“-          LG Chem, supplier of lithium ion battery

“-          Mitsubishi-GS Yuasa, supplier of lithium ion battery

“-          UniEnergy Technologies, supplier of vanadium flow battery

“-          Parker Hannifin, provider of the MESA-compliant power conversion system

“-          University of Washington, research expertise in power systems and computer science

“-          Pacific Northwest National Laboratory, research expertise in power systems


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