Projekt

Design and implementation of controller for single-phase converters

Udbyder

Vejleder

Sted

København og omegn

Background:

Nowadays, the use of single-phase power converters is constantly increasing due to the grid integration of small-scale energy resources (such as photovoltaic panels) and the electrification of existing railway systems. The operation of single-phase converters requires the design of a control unit that is able to synchronize the device with the electric grid and track the power flow in the system where required. In three-phase applications, synchronous reference frames PLLs are widely used to track frequency and phase of the electric grid due to their simplicity and robustness. As far as single-phase systems are concerned, in the technical literature several alternatives are proposed in the attempt to design PLLs equally reliable. The most common synchronization techniques range from the zero-crossing detection of the single-phase voltage, to the creation of a second fictitious phase that allows the analysis of the single-phase system in the dq reference frame. Despite the recent advancements in mono-phase PLLs, several controllers have not been fully investigated for the purpose of grid synchronization and active/reactive power compensation.

Publication

During this project, the student will have the opportunity to contribute to the design and of an innovative control strategy for single-phase converters. Due to the novelty of the results, the outcome of this project might lead to the publication of articles in IEEE.

Project description:

In this project, the student will contribute to the design of a controller for grid-connected single-phase power converters. The controller will be eventually implemented on a real component in the laboratories of DTU. A schematic representation of the set-up in the DTU labs is provided below.

As shown in the figure, a back-to-back AC-DC-AC converter is connected to an amplifier, representing the single-phase grid system. A control unit acts on the converter and on the amplifier, in order to able to test the controller in different scenarios, such as during voltage and frequency oscillations. A three-phase power cell provides energy to the converter, while an L filter damps out the harmonic generated by the converter itself. The control strategy is expected to be designed in Matlab/Simulink and implemented using Labview and cRIO components. Depending on the background and interests of the student, the student has the possibility to work on different topics including:

·         design and implementation of current controller for single-phase converters

·         tuning and implementation of an existing controller for power peak shaving application in single-phase railway systems

·         design and implementation of a new controller for fast and accurate peak power detection in single-phase systems

·         design and implementation of a new synchronization controller for power electronics devices in single-phase systems

·         design of a new synchronization controller for power electronics devices in single-phase systems

Tasks:

·         Literature review of the state of the art synchronization techniques for single-phase systems

·         Design of the controller on Matlab/Simulink and tuning of the main parameters

·         Implementation of the controller in cRIO

·         Test the control strategy in the lab

·         Article publication (if possible)

Learning objectives

·         Understanding the operation of a single-phase converter and its main limitations compared to three-phase converters

·         Have a background of the main synchronization techniques used in single-phase systems

·         Learn to use the most common simulation tools, including Matlab/Simulink to design controllers and model electric systems

·         Understanding the operation of a single-phase converter and its main limitations compared to three-phase converters

·         Have a background of the main synchronization techniques used in single-phase systems

·         Learn to use the most common simulation tools, including Matlab/Simulink to design controllers and model electric systems

·         Learn to use LabView and cRIO components to control power electronics devices

 

Student: individual or group of students

ECTS: Special course 5-30 ECTS


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Kontakt

Virksomhed/organisation

DTU Elektro

Navn

Nenad Mijatovic

Stilling

Lektor

Mail

nm@elektro.dtu.dk

Vejleder-info

Diplomingeniør, Elektroteknologi

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Stærkstrøm

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Elektronik

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Elektro

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Kandidatuddannelsen i Elektroteknologi

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Kandidatuddannelsen i Bæredygtig Energi

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

Kandidatuddannelsen i Vindenergi

Vejleder

Nenad Mijatovic

ECTS-point

5 - 35

Type

Afgangsprojekt, Andet, Bachelorprojekt, Fagprojekt, Kandidatspeciale, Kursusrelaterede projekter, Specialkursus

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Find os her

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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