Controlling Energy Storage Systems: Lessons Learned from the Washington Clean Energy Fund Demonstration Projects

Washington State Clean Energy Fund energy storage demonstration projects created opportunities for learning various aspects of Energy Storage Systems (ESSs), including its control for optimum economic return under various conditions. As the lead for ESS use-case analytics program in the ESS demonstration projects, the authors experienced practical aspects of ESS control in terms of control strategy development, control systems deployment, and performance during actual operation. This paper presents some of the learning opportunities availed from the demonstration projects along with a few key lessons for the benefit of the broader energy storage community. KeywordsWashington CEF, ESS control strategy, control system, ESS performance, power and SoC deviation