Marine Corps Air Station Miramar Microgrid: From Design and Construction to Operations and Commissioning
Black & Veatch and Schneider Electric are designing and constructing an energy security microgrid at Marine Corps Air Station (MCAS) Miramar, in San Diego, California. Once fully operational, the microgrid solution will provide resiliency, incorporate renewable energy, and allow operations at mission-critical facilities to continue if the utility power grid is compromised or damaged.
Follow the project, below, from design to commissioning to get an insider’s perspective at how this new microgrid solution is being developed.
PART 2.1: Power Plant Construction Underway
As the joint venture team constructs the new diesel and natural gas power plant, Mick Wasco, Marine Corps Air Station Miramar energy program manager, sheds some light on how this power plant will support the microgrid once operational. The steel erection for the power plant is scheduled for completion in March. Construction of the power plant is scheduled for completion in September 2018.
How did the project team decide the size of the backup generators for the microgrid?
The generators at the power plant are sized to cover critical loads in the case the microgrid’s renewable energy sources are not available. The diverse fuel and engines are in place to ensure that the generators can manage the critical loads.
What is the cost of energy and demand to utilize diesel as an economic alternative?
The microgrid control system has algorithms that will constantly analyze the costs and savings in order to dispatch generation. The usage of diesel to back up the landfill power plant is only a concept and the true operation of the microgrid may only use the natural gas to provide that support economically.
Demand charges can be around $13/kW per month, so if the landfill power drops offline during a peak period that is 3200 kW x $13 = $41,600 in one month. The cost of fuel can vary greatly, and the price of fuel and time to cover the load would be a factor in the design to run the generation to mitigate the peak. In the future, the microgrid will use energy storage to mitigate this issue.
What does the break-even point look like for converting diesel generators to natural gas in conjunction with establishing a microgrid?
Several factors drive these choices: air quality controls permitting (desired vs allowable run-time), availability and reliability of natural gas or diesel fuels, and evaluating their cost differences over time.
Part 2: Construction Begins
On Sept. 28, 2017, the U.S. Marine Corps and Naval Facilities Engineering Command Southwest leadership hosted a groundbreaking ceremony celebrating the start of construction for the microgrid.
Construction will include the buildout of a new diesel and natural gas power plant and refurbishment of an existing building into an advanced energy and water operations center (EWOC). The EWOC will provide microgrid and plant operators, and base energy personnel with direct control of the integrated microgrid control system, utilizing Schneider Electric’s OASyS SCADA software. The microgrid will also integrate existing power generated from renewable energy sources including biogas from a local landfill and solar photovoltaic (PV) generation, as well as provide expansion capabilities to incorporate a future energy storage system.
This is a really complex innovative thing that we’re doing here – taking large amounts of renewable energy and combining it with a central, conventional power plant to provide backup power to the installation. This is not just backup power like a traditional backup generator on a critical system; this is a redundant source of power that will provide us 100 percent capability in over 100 mission-critical buildings on base, including the entire flight line.
Mick Wasco, MCAS Miramar Energy Program Manager
“Advancing this first-of-its-kind project to the construction phase is a significant milestone. Once commissioned, the microgrid solution will help achieve energy efficiency, reliability and cost-saving goals, and protect essential flight line operations,” said Scott Kinner, Vice President of Federal Services at Black & Veatch.
PART 1: Microgrid Design
In May 2016, a Black & Veatch and Schneider Electric joint venture was selected to design and construct a microgrid at MCAS Miramar. The project design was configured to be scalable to potentially power the entire installation and manage electricity during peak usage.
The microgrid will power several facilities during a utility grid outage and utilize existing energy resources such as landfill gas, solar photovoltaic (PV) and energy storage systems for standard operations. All elements were designed and built in compliance with Department of Defense (DoD) security infrastructure and risk management requirements. Design incorporates renewable resources, advanced smart grid control systems, and demand response capabilities.
The new microgrid will also integrate with the utility control system at Naval Base San Diego which will have redundant controls for additional energy security.
Black & Veatch and Schneider Electric bring together an industry-leading portfolio of expertise, equipment and service to develop and operate an efficient, safe and sustainable microgrid energy solution. Through this unique joint venture, two worldwide industry leaders will deploy a team of experts that can deliver innovative, best-in-class, microgrid technologies that ensure reliability, resiliency and energy independence for our Marines and Sailors under any circumstance.
Daniel Vesey, U.S. Navy Global Account Manager, Energy and Sustainability Services, Schneider Electric USA