Hybrid Generation Solution for Mining Site
Authors
Murkowska, Marta Irena ; Zulaica Rey, Pedro ; Castro Reitich, Gustavo Andres
Term
4. term
Education
Publication year
2020
Pages
97
Abstract
Mange miner ligger så afsides, at de ikke kan få strøm fra elnettet. Derfor er det vigtigt at finde den mest pålidelige og økonomisk fordelagtige kombination af energikilder. Denne afhandling undersøger el-forsyning til en mine i Western Australia. Med softwareværktøjet HOMER Pro blev flere mulige energisystemer for de tilgængelige ressourcer modelleret. Ved hjælp af Analytic Hierarchy Process (AHP), en metode til at sammenligne og prioritere løsninger, blev den mest egnede løsning valgt til videre analyse. Usikkerheder blev udforsket med Monte Carlo-simuleringer, og en risikobegrænset optimeringsalgoritme blev brugt til at bestemme optimal drift, forventede omkostninger og CVaR (Conditional Value at Risk, et mål for omkostninger i ugunstige scenarier). Resultaterne viser, at ændringer i driftsomkostninger og CVaR ved stigende risikoaversion er begrænsede, hvilket skyldes de lave variable driftsomkostninger for vedvarende energikilder. Analysen viser, at en hybrid elektrificeringsløsning baseret på vindmøller, solceller og batteri både kan levere en pålidelig elforsyning og meget lave daglige driftsomkostninger.
Many mines are so remote that they cannot connect to the power grid, so it is crucial to choose a reliable and cost-effective mix of energy sources. This thesis examines how to power a mine in Western Australia. Using the HOMER Pro software, several feasible energy systems were modeled for the available resources. The Analytic Hierarchy Process (AHP), a method for comparing and prioritizing options, was then used to select the most suitable case for detailed study. Uncertainty was explored with Monte Carlo simulations, and a risk-constrained optimization algorithm determined optimal scheduling, expected cost, and CVaR (Conditional Value at Risk, a measure of cost in unfavorable scenarios). The results show that increases in risk aversion lead to only small changes in operating cost and CVaR, largely because renewable energy has low variable operating costs. Overall, a hybrid system based on wind turbines, solar panels, and batteries can provide reliable power with very low daily operating costs.
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