The University of Michigan Central Power Plant (CPP) and remote switching stations (substations) were in need of hardware and controls updates to increase system resiliency during harsh weather events and utility outages. Operations teams were aware of existing issues and an unsustainable model. In order to avoid any major incidents that would impact the 3000+ acre campus and neighboring University of Michigan Medical Center improvements were necessary.
Ultimately, the Power Preservation System utilizes modern platforms and is designed to directly remedy issues of reliability and resiliency of the entire 13.2kV electrical system.
RoviSys evaluated existing systems and recommended a solution plan focused on cost savings and operational benefit. A team of six engineers are designing and implementing a Schweitzer Engineering Laboratories-based control system that performs complex microgrid control functions, including electrical system monitoring (over 100 breakers), high speed load shedding, bus synchronization, generation dispatch (for five units), and event recording.
The Power Preservation System is comprised of redundant SEL Real-Time Automation Controllers (RTACs) and redundant SEL networking equipment with encryption, and utilizes IEC-61850 GOOSE messaging for relay communications. All data and control points are transmitted to the plants existing DeltaV DCS.
This DCS is the main system for operator interaction and monitoring
The solution is currently in development and is on schedule to be delivered to site in Q3 2019, with commissioning to occur in phases through 2020.
Ultimately, the Power Preservation System utilizes modern platforms and is designed to directly remedy issues of reliability and resiliency of the entire 13.2kV electrical system. A reduced reliance on manpower to stabilize plant conditions when timing is critical for preventing major outages across campus is expected.
The PPS will work in conjunction with protective relaying to ensure proper operation during utility-connected and islanded modes. Cost savings and operational benefits will be defined when the complete system is functional.