Client: Imperial Irrigation District
Location: El Centro, California
Following a major system outage and continued growth in oncoming solar generation, IID needed to install a battery energy storage system (BESS) to provide grid flexibility and increase reliability on its system. The BESS, one of the first of its size in North America and the first major storage project for IID, can respond to the variabilities of intermittent resources and provide peak shaving, frequency regulation and power balancing to support IID’s system. After performing critical system studies to help IID select a location and size for the BESS, POWER served as owner’s engineer and construction monitor for the project.
- 92 kV interconnection
- 5,032 modules, with over 100,000 lithium-ion batteries
- 8,000 square-foot facility
- Installed capacity allowing for an additional 50 MW of solar generation on IID’s system
POWER’S Studies and Specifications Services
- Load flow analysis, transient stability and system impact studies at two sites (Coachella and El Centro)
- PSLF model development and dynamic simulations
- Variable PV generation performance studies
- Siting and sizing studies and determination of operating modes
- Feasibility/interconnection analysis
- Design recommendations
- Construction specifications and contractor selection assistance
- Life Cycle Cost Analysis
POWER’S Owner’s Engineer Services
- Design review for BESS, civil/structural, mechanical, electrical, control and SCADA
- Energy Management System (EMS) control algorithms review
- Relay protection testing and commissioning monitoring
- Construction monitoring
- Helped IID to meet a critical FERC deadline by maintaining a fast-track engineering schedule and completing project commissioning ahead of schedule.
- Addressed concerns about renewable energy fluctuations through extensive studies that helped IID determine the optimal system location, size and operating scenarios for the BESS, including solar generation smoothing, var support, black start capabilities and spinning reserve.
- Oversaw successful installation of the BESS in extreme high temperatures through mitigation measures such as pouring cement (using more than 300 trucks) for the BESS’s building at night when temperatures were cooler.