The NTIS website and supporting ordering systems are undergoing a major upgrade from 8PM on September 25th through approximately October 6. During that time, much of the functionality, including subscription and product ordering, shipping, etc., will not be available. You may call NTIS at 1-800-553-6847 or (703) 605-6000 to place an order but you should expect delayed shipment. Please do NOT include credit card numbers in any email you might send NTIS.
Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number ADA564180
Title Optimization-Based Management of Energy Systems.
Publication Date May 2011
Media Count 13p
Personal Author L. Arnedo S. Dwari S. M. Oggianu Y. Lin
Abstract Why Distributed Power Systems and Energy Microgrids: security of energy supply and reduced energy costs and environmental impact. Energy microgrids are distributed power systems with the capability to work seamlessly in islanding and grid-connected modes. They include thermal and electrical systems. Key Results: feasible microgrid architectures are able to provide 50- 60% annual operating cost reduction, and optimization-based supervisory microgrid control provides an average annual 5-20% cost reduction compared with simple rule-based control strategy. Energy Management System (EMS) performs effective coordination and dispatching of distributed energy resources -- functionally similar to economic dispatch and unit commitment in power systems, selects combination of sources and storage to meet demand, considers constraints on availability of supply and operational limitations, and interfaces with customers and utilities. Conventional dispatching systems are optimization-based and use steady-state models. Renewable intermittency and memory associated with storage require planning and forecasting. Systematic decision-making with uncertainties in demand and availability of renewable resources. Conclusions: stochastic programming helps with decision making under uncertainty; stochastic programming tools can drastically reduce the value of perfect information; and sizing, architecture, and magnitude of loads dictate the required accuracy of forecasts.
Keywords Briefing charts
Cost reduction
Diesel generators
Electric batteries
Electric power production
Energy conservation
Energy management
Energy microgrids
Energy security
Energy storage
Energy system management
Renewable energy
Solar energy
Solar photovoltaic
Stochastic processes
Stochastic programming
Supply management
Thermal power
Waste heat utilization
Wind energy

Source Agency Non Paid ADAS
NTIS Subject Category 96 - Business & Economics
97O - Miscellaneous Energy Conversion & Storage
97I - Electric Power Production
97M - Batteries & Components
Corporate Author United Technologies Research Center, East Hartford, CT.
Document Type Technical report
Title Note Briefing charts.
NTIS Issue Number 1302
Contract Number N/A

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader