Detailed hourly simulation computer models, such as HYBRID1, are necessary to properly account for the time-varying loads, renewable resources, performance of the generators, and battery state of charge, as well as accommodating alternative system architectures and control/dispatch strategies. A time-series computer simulation model, HYBRID1, was used to calculate the performance of the various systems a separate analysis was used to determine the life-cycle cost of energy for each system. This paper presents the results of a conceptual systems analysis comparing alternative, renewable energy-based, hybrid power systems to a conventional diesel genset for a remote, non-electrified village in Guatemala.
The optimal choice of these two simple charging strategies is correlated to three dimensionless parameters, yielding a generalized dispatch design chart for an important class of systems.
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The results illustrate the nature of the optimal strategy and indicate that one of two simple diesel dispatch strategies - either load-following or full power for a minimum run time - can, in conjunction with the frugal use of stored energy (the Frugal Discharge Strategy), be virtually as cost-effective as the Ideal Predictive Strategy. An idealized predictive dispatch strategy, based on assumed perfect knowledge of future load and wind conditions, is developed and used as a benchmark in evaluating simple, non-predictive strategies. In this study, dispatch strategies are compared using (1) an analysis of cost trade-offs, (2) a simple, quasi-steady-state time-series model, and more » finally (3) HYBRID2, a more sophisticated stochastic time-series model. In systems with both batteries and diesel genset(s), dispatch affects the life-cycle cost through both the fuel usage and the battery life. Dispatch strategy is the aspect of control strategy that pertains to energy flows among components. Various combinations of wind turbine generators, photovoltaic arrays, diesel gensets, and batteries - remote hybrid power systems - may be preferred to diesel-only systems. Country of Publication: United States Language: English Subject: 17 WIND ENERGY 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS 25 ENERGY STORAGE 14 SOLAR ENERGY HYBRID SYSTEMS H CODES PERFORMANCE LIFE-CYCLE COST WIND TURBINES POWER GENERATION SIMULATION WIND POWER ELECTRICITY RENEWABLE ENERGY SOURCES ELECTRIC BATTERIES PHOTOVOLTAIC CELLS LOAD = ,įor small villages in developing countries, local stand-alone power systems are often more cost-effective than utility grid extension. annual conference and exhibition on wind power, Washington, DC (United States), 26- Other Information: PBD: 1995 Related Information: Is Part Of Windpower `95 - Proceedings of the American Wind Energy Association PB: 624 p. Publication Date: Research Org.: American Wind Energy Association, Washington, DC (United States) OSTI Identifier: 269387 Report Number(s): CONF-950309- ON: DE96011159 TRN: 96:003988-0052 Resource Type: Conference Resource Relation: Conference: 25.
Due to variations in loads and resources determining the most appropriate combination of these components for a particular village is a difficult modelling task.
There are a wide variety of hybrid systems being developed for village applications that have differing combinations of wind, photovoltaics, batteries, and diesel generators. Hybrid renewable systems are often more cost-effective than grid extensions or isolated diesel generators for providing power to remote villages.