EOS - Zynth Energy Storage Testing at Duke Energy

Session: Rapid-Fire Introductions by Poster PresentersDate: Wednesday, October 16, 2019 / 8:50AM - 9:20AM PDTTags: Poster / Deployment and Field Experience

Energy storage systems utilizing Lithium Ion based chemistry have  been deployed at grid scale throughout the world. Experience has shown that there are limitations of lithium ion based chemistries that limits its use in applications requiring long duration, temperature extremes or hazardous locations. 

This presentation will showcase the results of the current deployment of the DC Coupled Solar and EOS Znyth Chemistry based Energy Storage system at McAlpine Creek Substation Solar Field and Microgrid in Charlotte, NC.

The following objectives and goals will be attained by the project:

1. Validate the Eos Aurora as an inherently safe, low cost, and durable energy storage system. This validation will occur in parallel with the operational testing.

2. Safety will be reviewed and monitored from shipment to installation and operation and maintenance with a Safety White Paper as a deliverable.

3. Cost of the Eos Aurora will be documented as for total life cycle cost of the energy storage system, incorporated into a Reusable DCPV LCOE model.

4. Durability of the Eos Aurora will be documented for temperature extremes associated with PV Plants without the need for typical HVAC and fire suppression solutions with a Durability White Paper as a deliverable.

5. Demonstrate and quantify the advantages of a DC Coupled ESS Vs. an AC Coupled approach.

6. CapEx costs will be documented for a DC Coupled and AC Coupled solution for both retrofit and new PV plants for 600 VDC, 1000 VDC and 1500 VDC systems.

7. OpEx costs and system production benefits will be documented including a performance analysis deliverable comparing expected throughput energy and energy losses with at least 3 different PV system DC to AC load ratios. System round trip efficiency, thermal management, and system performance will be analyzed across the following testing protocols tested for 90 days each:

a. DC power clipping capture

b. Low voltage capture

c. Solar firming / smoothing

d. Solar shifting

e. Ancillary services
f. Optimization algorithms

8. Complexity and risk will be described with recommended approach for system design, installation, operation, and maintenance.

9. Quantify the opportunity and risks to physically incorporate the Eos Aurora Battery System within the solar array.

10. Investigate and document the ability to physically nest the batteries within and under the solar array from a mechanical, electrical, code, safety, and operational perspective.

Experiences including system design, deployment, installation, commissioning will be presented and use case test results will be made available.