Leteći start sinkronoga stroja primjenom isprekidanoga načina rada energetskoga pretvarača

doctoral thesis

• Title (english): Flying start of synchronous machine based on discontinuous power converter operation mode
• Author: Luka Pravica; MBZ: 359512
• Mentor: Damir Sumina (mentor)
• Committee member: Igor Erceg (predsjednik povjerenstva)
• Committee member: Martina Kutija (član povjerenstva)
• Committee member: Neven Bulić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Electric Machines, Drives and Automation); Zagreb
• Defense date and country: 2022-12-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Electromechanical Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Ova disertacija rezultat je istraživanja u području upravljanja sinkronim strojevima bez mjernog člana brzine vrtnje za potrebe uključenja pretvarača dok je stroj u vrtnji, što se naziva leteći start. Potreba za letećim startom postoji kod vjetroagregata, pumpi i ventilatora. Izvedba takvih sustava bez mjernog člana brzine vrtnje dovodi do povećanja robusnosti te smanjenja troškova investicije. U disertaciji je dan pregled literature za algoritme estimacije brzine vrtnje i položaja rotora, s posebnim osvrtom na algoritme koji se primjenjuju za leteći start. Izvedeni su matematički modeli sinkronog stroja s umetnutim permanentnim magnetima te sinkronoga reluktantnoga stroja potpomognut s permanentnim magnetima. Opisano je upravljanje sinkronim strojevima tijekom trajnog načina rada, radna područja, vektorsko upravljanje orijentacijom magnetskog toka i vektorska modulacija širine impulsa. Izvorni znanstveni doprinos ove disertacije vezan je uz leteći start sinkronoga stroja s permanentnim magnetima i leteći start sinkronoga reluktantnoga stroja primjenom isprekidanoga načina rada energetskoga pretvarača, a sastoji se od: Matematički model sinkronoga stroja s permanentnim magnetima za isprekidani način rada energetskoga pretvarača u svrhu kontinuirane estimacije brzine vrtnje i položaja rotora. Matematički model sinkronoga reluktantnoga stroja za isprekidani način rada energetskog pretvarača u svrhu kontinuirane estimacije brzine vrtnje i položaja rotora. Metoda upravljanja isprekidanim načinom rada energetskog pretvarača tijekom perioda sinkronizacije pretvarača i sinkronoga stroja u vrtnji. Predloženi algoritmi estimacije brzine vrtnje i položaja rotora kao i algoritam upravljanja strujom kratkoga spoja implementirani su u digitalni sustav i eksperimentalno provjereni na laboratorijskom postavu. Eksperimentalna ispitivanja potvrđuju učinkovitost implementiranih algoritama, prvenstveno mogućnost kontinuirane estimacije brzine vrtnje dok se ona mijenja te održavanje struje tijekom letećeg starta na zadanom iznosu.

Abstract (english)

This dissertation is the result of research in the sensorless control of synchronous machines to switch on the inverter while the machine is rotating, which is called a flying start. The need for a flying start exists in wind turbines, pumps, and fans. Sensorless control increases robustness and reduces investment costs. The dissertation reviews the literature on sensorless algorithms, i.e., rotor position and speed estimation, with particular reference to flying start algorithms. Mathematical models of a permanent magnet synchronous machine and a permanent magnet-assisted synchronous reluctance machine were derived. Control of synchronous machines in continuous operation, operating ranges, field-oriented vector control, and space vector pulse-width modulation are described. The original scientific contribution of this dissertation is related to the flying start of a synchronous machine using the discontinuous mode of operation of the power converter and consists of the following: Mathematical model of a permanent magnet synchronous machine for the discontinuous mode of operation of the power converter for continuous rotor speed estimation. Mathematical model of synchronous reluctance machine for the discontinuous mode of operation of power converter for continuous rotor speed estimation. Method for controlling the discontinuous mode of operation of the power converter during the flying start. The proposed rotor speed and position estimation algorithms and the short-circuit current control algorithm were implemented in a digital control system and experimentally verified in a laboratory setup. Experimental tests confirm the effectiveness of the implemented algorithms, primarily the possibility of continuous estimation of the rotor speed while it changes and maintaining the current during the flying start at the reference value.

• Keywords: sinkroni stroj s permanentnim magnetima; sinkroni reluktantni stroj; leteći start; isprekidani način rada; estimacija brzine vrtnje i položaja rotora; upravljanje bez mjernog člana brzine rotora
• Keywords (english): permanent magnet synchronous machine; synchronous reluctance machine; flying start; discontinuous converter operation; speed and position estimation; sensorless control
• Language: croatian
• URN:NBN: urn:nbn:hr:168:797590
• Promotion: 2023
• Study programme: Title: Doctoral study programme "Electrical Engineering and Computing"; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, po-dručje tehničkih znanosti (doktor/doktorica znanosti, po-dručje tehničkih znanosti)
• Type of resource: Text
• Extent: [11], 125 str. : graf. prikazi ; 31 cm + CD-ROM.
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-04-07 08:04:46