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Simulation of wind-diesel systems

Gupta, Tanvi (2014) Simulation of wind-diesel systems. Other thesis, Murdoch University.

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Abstract

The wind-diesel hybrid system is the combination of wind turbines and diesel generators to generate power regardless of the irregular wind resource.

In this paper, the modular simulation tool ‘Microsoft Excel’ has been developed to simulate different scenarios of operation for the hybrid system. This is done by making energy balance calculations on an hourly basis, for each of the 8760 hours in a year, before defining the different components for every scenario. The main modules of the simulator include a wind turbine, loads and diesel generators. By examining the case studies, the most beneficial approach for improving the Excel spread sheet seems to be through the introduction of further power analysis methods, so as to gain a better understanding of the system. Using this tool, a designer can develop better control strategies to balance system power flows under various generation conditions.

The case studies, chosen as a means to appropriately compare the hybrid system’s energy analysis with and without further power analysis tools, have been categorised into two cases. For the first case, the energy analysis is completely based on hourly data both with and without wind speed standard deviation data while the second case involves power analysis on a higher resolution by using 10 minute data with hourly averaged data from 10 minute data. Statistical methods are also utilised in investigating the case studies where the standard deviation is included. This paper analyse the differences between the wind energy generated in both the cases and gets completed by observing that standard deviation doesn’t have much effect on the wind energy output. Additionally, the use of higher resolution data; i.e. 10 minutes data, has proved to be more favourable as it generates more precise energy output via various power analysis methods.

Finally, the factors affecting the economics of the system have been studied, which includes the cost of wind turbines, diesel generators and their operation & maintenance costs- the most important costs.

This thesis project has investigated many ideas in the development of the system. Further developments, are suggested to continue to improve the system.

Publication Type: Thesis (Other)
Murdoch Affiliation: School of Engineering and Information Technology
Supervisor: Calais, Martina and Carter, Craig
URI: http://researchrepository.murdoch.edu.au/id/eprint/23519
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