Integracija elektroenergetskih sustava na hibridnim šumskim traktorima temeljena na paralelnom nizu pretvarača istosmjerne struje

master's thesis

• Title (english): Integration of electrical systems on a hybrid skidder based on parallelized direct current power converter array
• Author: Ana Parčina
• Mentor: Mihael Cipek (mentor)
• Mentor: Matija Krznar (komentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Hibridni kao i električni pogon su ekološki prihvatljivija rješenja u usporedbi s
konvencionalnim pogonom, a s obzirom na ograničene zalihe nafte, postaju sve popularniji.
Stoga, je upravo hibridni pogon razmotren u ovom radu, točnije razmotrene su komponente
energetske elektronike za hibridni šumski traktor s naglaskom na integraciju visokonaponskog
i niskonaponskog energetskog sustava.
U radu je dan pregled energetske elektronike za hibridna vozila te je predstavljen izbor svih
komponenti potrebnih za hibridizaciju razmatranog vozila. Provedena je analiza troškova
kako bi se odredila isplativost takve investicije.
Nadalje, kao rješenje za integraciju visokonaponskog i niskonaponskog energetskog sustava
predstavljen je paralelni rad više silaznih DC pretvarača. Također je predložen hijerarhijski
sustav upravljanja radom pretvarača koji obuhvaća primarnu, sekundarnu i tercijarnu
regulaciju. Rad takvog sustava ispitan je simulacijski i eksperimentalno.
Rad je koncipiran u nekoliko poglavlja. U uvodu je ukratko opisana problematika rada. U
drugom poglavlju nalazi se pregled značajki šumskog traktora. Treće poglavlje daje pregled
energetske elektronike koja se koristi za hibridna vozila te komponenti koje su izabrane za
razmatrani traktor. Četvrto poglavlje odnosi se na analizu troškova, a peto na rješenje za
integraciju visokonaponskog i niskonaponskog energetskog sustava. Šesto poglavlje opisuje
računalni model pretvarača. U sedmom poglavlju predstavljeno je rješenje za regulaciju
paralelnog rada pretvarača, a osmo poglavlje sadrži eksperimentalne rezultate. Na kraju je dan
osvrt na diplomski rad u cjelini.

Abstract (english)

Hybrid as well as electric propulsion are more environmentally friendly solutions compared to
conventional propulsion, and given the limited oil reserves, they are becoming more popular.
Therefore, the hybrid propulsion is considered in this paper, more specifically the components
of power electronics for a hybrid forest tractor with emphasis on the integration of high
voltage and low voltage power system.
The paper gives an overview of power electronics for hybrid vehicles and presents a selection
of all components required for hybridization of the considered vehicle. A cost analysis was
conducted to determine the profitability of such an investment.
Furthermore, as a solution for the integration of high-voltage and low-voltage power systems,
the parallel operation of several buck DC converters is presented. A hierarchical control
system of converter operation is also proposed, which includes primary, secondary and
tertiary regulation. The operation of such a system was examined through the simulation and
experimentally.
The paper is conceived in several chapters. The introduction briefly describes the issues of
work. The second chapter provides an overview of the characteristics of a forest tractor. The
third chapter provides an overview of the power electronics used for hybrid vehicles and the
components selected for the considered tractor. The fourth chapter deals with cost analysis,
and the fifth with a solution for the integration of high-voltage and low-voltage energy
systems. Chapter six describes the computer model of the converter. The seventh chapter
presents a solution for regulating the parallel operation of the inverter, and the eighth chapter
contains experimental results. At the end, a review of the thesis is given.

• Keywords: energetska elektronika; hibridna vozila; paralelni rad silaznih DC pretvarača; učinkovitost
• Keywords (english): efficiency; hybrid vehicles; parallel operation of buck converters; power electronics
• Language: croatian
• URN:NBN: urn:nbn:hr:235:962415
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-05-06 05:46:02