prikaz prve stranice dokumenta Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom
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master's thesis
Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2019. urn:nbn:hr:168:103181
Hleb, Filip
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

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Hleb, F. (2019). Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom (Master's thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:103181

Hleb, Filip. "Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2019. https://urn.nsk.hr/urn:nbn:hr:168:103181

Hleb, Filip. "Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom." Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2019. https://urn.nsk.hr/urn:nbn:hr:168:103181

Hleb, F. (2019). 'Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom', Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 14 November 2024, https://urn.nsk.hr/urn:nbn:hr:168:103181

Hleb F. Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom [Master's thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2019 [cited 2024 November 14] Available at: https://urn.nsk.hr/urn:nbn:hr:168:103181

F. Hleb, "Harmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom", Master's thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:168:103181

Metadata
TitleHarmonička analiza frekvencijskog pretvarača s trofaznim diodnim mostom
Title (english)Harmonic Analysis of a Frequency Converter with Three-Phase Diode Bridge Rectifier
AuthorFilip Hleb
MentorMartina Kutija (mentor)
Committee memberMartina Kutija (predsjednik povjerenstva)
Committee memberDamir Sumina (član povjerenstva)
Committee memberMarinko Kovačić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2019-09-18, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
U ovom radu analizirani su harmonici ulazne struje tri industrijska pretvarača u laboratorijskim uvjetima, jednoga industrijskog pretvarača u industrijskim uvjetima i sumirani strujni harmonici na sabirnici koje uzrokuju 4 grupe industrijskih pretvarača u laboratorijskim uvjetima. Strujni harmonici analizirani su u realnim uvjetima i pri promjenjivom opterećenju. Analizirani su karakteristični strujni harmonici, THDi, faktor snage i valni oblici. Razmotreni su utjecaji istosmjerne i/ili izmjenične prigušnice na harmonike ulazne struje. Zaključeno je da amplitude viših harmonika s porastom snage dolaze u zasićenje, pa s porastom snage pada THDi i raste faktor snage. Dodatak istosmjerne ili izmjenične prigušnice značajno smanjuje udio harmoničkih izobličenja struje pretvarača. Naponska nesimetrija može uzrokovati pojavu struja tripleta. Kod pretvarača koji su sumjerljivi snagom s napojnim transformatorom, transformator djeluje kao izmjenična prigušnica. Kod sumiranja harmonika, zbog promjenjivog faznog kuta, viši harmonici mogu se poništiti ili sumirati tako da je suma manja od algebarskog zbroja pa je izobličenje struje sabirnice na koju je priključeno više pretvarača manje od izobličenja struje jednog pretvarača sumjerljive snage.
Abstract (english)
In this thesis input current harmonics of three different industrial frequency converters in laboratory conditions, one industrial frequency converter in industrial conditions and summarized busbar current of 4 groups of industrial frequency converters in laboratory conditions were analysed. Current harmonics were analysed in real conditions and with varying the load. Characteristic current harmonics, THDi, power factor and waveforms were analysed. The effects of DC choke and/or AC reactor on input current harmonics were discussed. It is concluded that amplitudes of higher harmonics get into saturation with an increase in load. This decreases THDi and increases power factor. The addition of the DC choke or AC reactor significantly decreases the harmonic distortion of input current. Voltage asymmetry can result in triplen current harmonics flow. For converters that are comparable in power with its feeding voltage transformers, the transformer acts as an AC choke. In harmonic summation, due to the varying current phase angles, higher harmonics can cancel each other or sum in a way that the resulting sum is less than algebraic sum of individual components. The resulting distortion of busbar current is less when more converters are connected in comparison to one of the comparable power.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:103181
Study programmeTitle: Electrical Engineering and Information Technology
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
Type of resourceText
File originBorn digital
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Created on2020-01-07 18:26:27