- Peak-shaving
- Cogeneration
- Standby power
- Virtual Power Plant
A leading defense contractor, wanting reliable, yet cost-effective power when building its renowned and intricate military machines, has selected Encorp and a team of energy technology companies to help ensure the power remains constant at its immense California manufacturing plant.
Due for completion in 2003, the new 1.35 megawatt combined-heat-and-power system will supplement - not replace - electricity provided by the local utility. In essence, the defense contractor will reduce its energy demand from the utility by 1.35 MW, which will reduce its energy costs - both electrical and thermal - by the use of on-site cogeneration.
In addition to generating electricity when needed, the new co-generation system will use excess engine heat to supplement thermal and air conditioning loads in the facility.
Powered by a 1.35MW Waukesha engine supplied by Stewart & Stevenson Distributed Energy Solutions, the system at the California manufacturing plant features Encorp's digital paralleling switchgear, Encorp's state-of-the-art Generator Power Control™ and Utility Power Control™, and communication gateway and software servers for local and remote connectivity.
Fort Bragg in North Carolina has created one of the world's largest microgrids by integrating a variety of distributed generation technologies that work in conjunction with the facility's utility infrastructure. The post, which sprawls over 100 square miles, owns its own electric distribution network. Despite its size, the various generation technologies are fully integrated with the post's distribution network, information technology and communications infrastructure. From a central energy management center, the various generators are monitored and dispatched based on utility availability and load management requirements. As a result, Fort Bragg has enhanced energy reliability and reduced overall energy costs.
To enhance power reliability while reducing costs, Fort Bragg, with guidance from Honeywell, elected to build a microgrid. A microgrid is a system of multiple power sources of potentially different sizes and technologies that serve aggregated electrical loads on a common energy distribution network. Fort Bragg has aggregated 15 diesel generators, one 5kW fuel cell and will soon install one 5 MW gas turbine on its microgrid. Using a full parallel interface that allows seamless power flows, the generators use the post's distribution system to export power to various loads.
Fifteen diesel engines representing more than 8 MW were originally installed as isolated standby systems with open transition switches. As traditional emergency units, their primary function was to provide electricity only in the event of loss of utility power to the base. These units were retrofited for load management functions with closed transfer systems and each unit had an intelligent communications gateway installed to monitor and automate maintenance and operations. This method preserved the OEM engine controls and original transfer switch. The emergency backup capabilities have not been impaired.
-- Power Engineering, May 2003 (By Josh Meyer, Encorp and Jim Peedin, Honeywell)
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