ASHRAE Journal - November 2011 - (Page B18)
BACnet Today & the Smart Grid
Information Model Standard for Integrating Facilities with Smart Grid
By Steven T. Bushby, Fellow ASHRAE
he national electric grid has been called the supreme engineering achievement of the 20th century by the National Academy of En-
gineering.1 In spite of its success and the tremendous impact it has had on our lives, the electric grid is under strain from increasing demand and aging infrastructure, and is in need of modernization. The Energy Independence and Security Act (EISA) of 20072 established a national policy to modernize the nation’s electricity transmission and distribution system to maintain a reliable and secure infrastructure that can meet
centers and the generation and transmission systems make control actions with limited situational awareness and information about customer interactions. There is limited automation and, in many cases, the utility is unable to detect a service outage unless reported by a customer. Part of the idea behind a future smart grid is to improve measurement and control technology used to manage electricity generation and distribution, but the most important concept is to transform the fundamental structure of the grid by combining an intelligence infrastructure with the grid that will enable two-way
future demand growth and a range of other specific objectives. The About the Author legislation calls this modernization a “smart grid.”
The present electric grid can be characterized as a top down system with one-way ﬂow of electricity from central
Steven T. Bushby is group leader of the Mechanical Systems and Controls Group, Building Environment Division, Engineering Laboratory at National Institute of Standards and Technology in Gaithersburg, Md. He is chair of ASHRAE Standard Project Committee 201, Facility Smart Grid Information Model.
generating plants through regional transmission systems to local distribution networks and end loads. Market operations
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