Sodium-Metal-Halide Battery Energy Storage for DoD Installations
The objective of this project is to demonstrate the integration of a 1MVA, 576kWhr, Battery Energy Storage System (BESS) that will work in concert with microgrid controls at the Twentynine Palms Marine Corps Base, California. The project will demonstrate how a robust BESS will alleviate renewable energy intermittency, improve island-mode operations, and reduce demand charges and peak load stress on the main transformers and other grid equipment. Secondary objectives include assessing the microgrid with sodium-metal-halide energy storage technology and exploring additional microgrid features, which are enabled with the BESS unit such as voltage support, frequency regulation, low voltage ride through (LVRT) support, and uninterruptable power supply (UPS) operation.
The BESS incorporates utility grade power electronics, a step-up cast coil transformer, AC and DC switchgear, and sodium-metal-halide battery energy storage. This integrated, self-contained system includes full supervisory control and data acquisition (SCADA) compatibility to interface with the Twentynine Palms' smart grid. The power electronic system includes a solid state inverter close-coupled to a low-loss, high efficiency cast coil transformer with integrated switchgear. The energy storage technology is a sodium-metal-halide battery system that is being upgraded for utility use. The battery and inverter technologies are well suited for severe climates, and this project will demonstrate the efficacy of the sodium-metal-halide battery technology in desert climates. The baseline chemistry operates at 300°C and in ultra-insulated stainless steel enclosures. The demonstration will determine if the system can provide energy security and meet its efficiency objectives on a daily basis without any downtime.
Expected benefits of sodium-metal-halide battery energy storage include the following:
- Energy Efficiency - Gains are achievable through the use of primary generation, renewable integration, reduction in spinning reserve, and solid state power electronic standby reserve.
- Reliability - The BESS provides increased grid stability while in islanded operation.
- Renewable Integration - The BESS will provide ramp rate control of wind and solar resources, enabling larger penetration and utilization during islanded operation.
- Power Quality - The four-quadrant inverter can provide both real and reactive power. During normal operation, available reactive power can provide voltage support and active power factor correction. Real power can provide frequency support to stabilize the microgrid.
(Anticipated Project Completion - 2014)
Points of Contact
Mr. Daniel Cohee
PDE Total Energy Solutions
Energy and Water
SERDP and ESTCP
- Fact Sheet - Brief project summary with links to related documents and points of contact.
- Final Report - Comprehensive report for every completed SERDP and ESTCP project that contains all technical results.
- Cost & Performance Report - Overview of ESTCP demonstration activities, results, and conclusions, standardized to facilitate implementation decisions.
- Technical Report - Additional interim reports, laboratory reports, demonstration reports, and technology survey reports.
- Guidance - Instructional information on technical topics such as protocols and user’s guides.
- Workshop Report - Summary of workshop discussion and findings.
- Multimedia - On demand videos, animations, and webcasts highlighting featured initiatives or technologies.
- Model/Software - Computer programs and applications available for download.
- Database - Digitally organized collection of data available to search and access.