WIND DIESEL SYSTEM SIMULATION:A SCREENING LEVEL MODEL

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Abstract
This paper describes a screening level simulation model for wind/diesel systems. It is intended for use to give a quick overview of the possible appropriateness of a wind/diesel system and indicate whether more detailed analysis would be of use. The model was developed for use on personal computers and to trade complexity for ease of operation. The wind/diesel system modeled may include: 1) Wind regime, 2) One or more wind turbines, 3) System electrical load 4) One or more diesel generators, 5) Dump load, 6) Short term storage, and 7) System controller. The model does not consider storage explicitly, but does distinguish between the no storage and minimal storage (power smoothing) systems. This work is based on the more detailed simulation models previously developed at the University of Massachusetts, but uses probabilistic methods rather than time series data inputs. As such it requires only mean and standard deviation of wind speed and load for each month or season. The model functions by assuming that occurrences of wind speed can be modelled by a Weibull distribution and that the lead follows either a Weibull or normal distribution, In addition, both the wind speed and load are assumed to be uncorrelated within each month or season. The paper also includes a comparison of the model with the more detailed UMass model, HYBRID1.

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