OPERATION & MAINTENANCE OF POWER PLANTS
provided start-up for a unique power control system, and has continued to service the system since start-up. Te system controls all power distribution throughout the campus, including all source breakers – utility (15kV and CHP), wind, solar, generators, MV loop bus substations, automatic transfer switches (ATSs) and load controls.
As might be expected, this complex
system requires a very complex load control system. For example, it has to allow the hockey rink chillers to run in the summer during an outage but maintain power to the campus. Te complete power control system line-up features the following: • 15kV utility source that feeds a ring bus with eight medium voltage/low voltage (MV/LV) loop switching substations for each building. Russelectric controls the open and close of the utility main switch and monitor’s the utility main’s health and protection of the utility main
• 15kV natural gas 2MW Caterpillar CAT generator with switchgear for continuous parallel to the 15kV loop bus. Russelectric supplied the switchgear for full engine control and breaker operations to parallel with the utility and for emergency island operation • One natural gas 750kW Caterpillar
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generator used for emergency backup only
• One gas-fired FlexEnergy micro turbine (Ingersoll Rand MT250 microturbine) for CHP distributed energy and utility tie to the LV substations • Control and distribution switchgear that controls the emergency, CHP and utility • 12 ATSs for emergency power of four natural gas engines in each building
• 25 vertical-axis wind turbines that generate 32,000kWh of renewable electricity annually. Te wind turbines are connected to each of the LV substations • 721 rooftop photovoltaic panels gathering power from the sun, saving another 235,000kWh per year. Tese are connected to each of the three dormitory LV substations. Russelectric controls the solar arrays’ breaker output and instructs the solar arrays when to come on or go off
Te system officially only parallels the onsite green energy generation components (solar, wind and micro turbine) with the utility, although they have run the natural gas engines in parallel with the solar in island mode for limited periods. Since the initial installation, the system has been expanded to include additional equipment, including another natural
gas generator, additional load controls, and several more automatic transfer switches.
SCADA DISPLAYS COMPLEXITY AND DETAIL OF ALL THE SYSTEMS Another feature of the system was the development of the Russelectric SCADA system, which takes the complexity and detail of all the systems and displays it for customer use. Other standard SCADA systems would not have been able to tie everything together – with one line diagrams and front views of equipment that provide the ability to visually see the entire system. Rather than requiring the use of specific players in the market, Russelectric supports any equipment the customer wishes to use – signing on to working through the challenges to make the microgrid work. Tis is critical to success when the task is controlling multiple traditional and renewable sources.
Steve Dunn is aftermarket product line manager at Russelectric.
www.russelectric.com
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