Modelling and Control of Wind Turbines, Solar PVs and Electric Vehicles in Residential Grids
Author
Badulescu, Nicolae
Term
10. term
Education
Publication year
2016
Submitted on
2016-07-31
Pages
65
Abstract
Ifølge de seneste energipolitikker skal Danmark være uafhængig af konventionelle brændsler i 2050. En mere miljøvenlig transport kræver derfor en høj udbredelse af elbiler. Dette speciale undersøger, hvor meget vindkraft, solcellestrøm (fotovoltaik) og elbilopladning et typisk distributionsnet (det lokale elnet) kan håndtere under forskellige forhold uden at overskride driftsgrænserne. Først valideres en reference-model af et distributionsnet, så der kan laves en steady-state-analyse, dvs. et øjebliksbillede af normal drift, når vedvarende kilder kobles på. Der simuleres både vinter- og sommerscenarier. Andelen af vedvarende energi og belastningen fra elbilopladning øges gradvist, og det maksimale niveau fastlægges ved forsøg-og-fejl, indtil nettet når sin driftsgrænse. Til sidst afprøves fem lade-strategier for elbiler, herunder opladning i spidsbelastningstimer og om natten.
Recent energy policies state that Denmark should become independent of conventional fuels by 2050. Cleaner transport will therefore require a high uptake of electric vehicles. This thesis examines how much wind power, solar power (photovoltaic) and electric vehicle charging a typical distribution grid—the local electricity network—can accommodate under different conditions without exceeding its operating limits. First, a benchmark model of a distribution grid is validated to enable a steady-state analysis, that is, a snapshot of normal operation, with renewable sources integrated. Simulations are run for both winter and summer scenarios. The share of renewable generation and the load from EV charging is then increased step by step, and the maximum allowable level is found through trial-and-error tests until the grid reaches its limit. Finally, five EV charging strategies are evaluated, including plugging in during peak-load hours and at night.
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