Hello I am Jason Zyskowski at the Snohomish County PUD I manage the substation engineering department here at the district and I’ve also acted as the project manager on the districts first energy storage project MESA 1. Alright we are now inside Hardeson substation looking at the battery container. You can see the battery modules behind me, these battery modules were provided by Mitsubishi GS Yuasa. There’s a total of 240 battery modules in the whole container, twelve different strings containing twenty modules in each string. The voltage ranges on each string between 700 volts DC when it’s fully discharged to 1000 volts when it’s fully charged. We’re now looking at a different section of the battery container, you can see behind me the disconnects for each string. These are the DC disconnects that allow each string to be electrically isolated and then also back on the back wall you can see the battery management system for each string, once again that’s looking at the cell voltages, temperatures and current. We also have arch flash detectors throughout the container so that if there is some sort of electrical arch or flash in there those will detect that and then immediately trip all the breakers associated with the system and de-energize it. We are now standing in front of the power conversion system. This was provided by Parker-Hannifin and this system converts the DC battery power to AC, obviously the electric system is AC and so there has to be some way to convert the power from DC to AC when the batteries are discharging and then AC to DC when the batteries are charging. We are now standing in front of the control cabinet which houses the 1Energy control system. You can see right here to my right, the Main Computer and the HMI. The main computer has all of the algorithms on it that are used to implement the Use cases (??) the Use cases include renewables, integration, peak shifting, power factor correction and so on. This control system is built in compliance with the MESA standard and also received funding from the state of Washington through the clean energy fund for all of this work. The district looks forward to more projects with the state, namely MESA 2, and continuing to explore the viability of the MESA standards through the clean energy fund.
Snohomish PUD is partnering with Doosan GridTech to design and deploy three MESA-based energy storage systems controlled by the Doosan GridTech Intelligent Controller® (DG-IC®). Fleet optimization and scheduling is provided by the Doosan GridTech Distributed Energy Resource Optimizer® (DG-DERO®). The diagram shows the major components of the systems as currently planned. The first system, MESA 1a, was dedicated on January 15, 2015.The DG-DERO runs in the utility data center and is built on open standards such as MESA, OpenADR, Web Services, ICCP, and DNP3. Drawing on its suite of bulk power applications, DG-DERO maximizes the economics of the fleet of energy storage systems by matching each storage asset to the most valuable mix of opportunities on a day-ahead, hour-ahead and real-time basis. Applications, or ways that DG-DERO will optimize the value of distributed resources for Snohomish, include: