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Design of a Photovoltaic Power Management System for a Forest Fire Surveillance UAV
KTH, School of Electrical Engineering and Computer Science (EECS).
KTH, School of Electrical Engineering and Computer Science (EECS).
2023 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

This report presents an implementation for power system utilizing photovoltaic (PV) cells intendedfor an unmanned aerial vehicle (UAV). The system design aims to achieve perpetual flight during sunhours by optimizing PV-cell performance and storing excess energy in a battery. The proposedimplementation is based around having two parallel DC-converters connected to the PV array, oneconnected straight to the load and another to the battery. Thus providing the option to charge thebattery separately, use the battery as a occasional aid or completely isolate it from the circuit.Finding lightweight components that are able to handle high nominal currents has proven to bemore difficult than anticipated. However, the control loop and system architecture presented in thisreport has shown good overall performance in terms of efficiency, speed and battery management.

Abstract [sv]

I den här rapporten presenteras en implementering av ett kraftsystem för solceller (PV) avsedd förobemannade flygfarkoster (UAV). Syftet med systemets utformning är att uppnå oändlig flygtidunder dygnets soltimmar genom att optimera solcellernas prestanda och lagra överskottsenergi i ettbatteri. Det föreslagna genomförandet bygger på att använda två parallella likströmsomvandlareanslutna till solcellerna. En som ansluts direkt till lasten och en som ansluts till batteriet. På så sättkan man välja att ladda batteriet separat, använda batteriet som ett tillfälligt hjälpmedel eller heltisolera det från kretsen. Det har visat sig vara svårare än väntat att hitta lätta komponenter somklarar tillräckligt höga strömmar för applikationen, men den styrslinga och systemarkitektur sompresenteras i rapporten har visat goda övergripande resultat när det gäller effektivitet, hastighetoch batterihantering.

Place, publisher, year, edition, pages
2023. , p. 459-466
Series
TRITA-EECS-EX ; 2023:175
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-341723OAI: oai:DiVA.org:kth-341723DiVA, id: diva2:1823395
Supervisors
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Projects
Kandidatexjobb i elektroteknik 2023, KTH, StockholmAvailable from: 2024-01-02 Created: 2024-01-02

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CiteExportLink to record
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