Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Selection of suitable PWM switching and control methods for modular multilevel converter drives /
Download
index.pdf
Date
2014
Author
Çiftçi, Barış
Metadata
Show full item record
Item Usage Stats
184
views
132
downloads
Cite This
The thesis focuses on the determination of suitable carrier based PWM switching and control method for modular multilevel converter drives. Characterization of various level-shifted and phase-shifted carrier based PWM methods are provided in terms of switching pulse patterns and resultant voltage waveforms both for N+1 and 2N+1 level output phase voltages. Modular multilevel converter PWM based control approaches are evaluated. Performances of different control methods are given for output harmonics distortion, submodule capacitor voltage ripple, circulating current ac component, efficiency and other criteria under equal switching count principle, for the dc/ac conversion step of a 10MW HVDC transmission system. Moreover, a 9.1MW induction motor drive application is studied from standstill to full speed range, giving attention to low frequency region operation. The study is conducted by means of mathematical analysis of the converter, topological and controller design, and detailed computer simulations.
Subject Keywords
Electric current converters.
,
Pulse-duration modulation.
,
Pulse modulation (Electronics).
URI
http://etd.lib.metu.edu.tr/upload/12618358/index.pdf
https://hdl.handle.net/11511/24363
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
Investigation of modular multilevel converter control methods
Ertürk, Feyzullah; Hava, Ahmet Masum; Department of Electrical and Electronics Engineering (2015)
The thesis focuses on the analysis and control of modular multilevel converter (MMC). The control structures used in the control of MMC are presented. Outer control loops of the converter such as output current, DC-link voltage, and power controls as well as inner control structures unique to the converter such as circulating current control and sorting algorithm based submodule voltage balancing are investigated. In addition, switching methods proposed for MMC are also described. These control and switchin...
Switch mode converter based damping of PWM converter with LCLtype filter for grid interface of renewable energy systems /
Usluer, Sebahattin Nadir; Hava, Ahmet Masum; Department of Electrical and Electronics Engineering (2014)
This thesis involves design and simulation for switch mode converter based damping of three-phase LCL-filtered PWM converter widely used for grid-interface of renewable energy systems. The study involves the resonance damping of high power voltage source converters connected to the grid via LCL filters. The design is verified by means of detailed computer simulations. The study considers eliminating the resonant harmonics which results in overvoltage/current stresses and leads to the failure of the converte...
A High Performance PWM Algorithm for Common Mode Voltage Reduction in Three-phase Voltage Source Inverters
Uen, Emre; Hava, Ahmet Masum (2008-06-19)
A high performance PWM algorithm with reduced common mode voltage (CMV) and satisfactory overall performance is proposed for three-phase PWM inverter drives. The algorithm combines the near state PWM (NSPWM) method which has superior overall performance characteristics at high modulation index and MAZSPWM, a modified form of the active zero state PWM method (AZSPWM1), which is suitable for low modulation index range of operation. Since AZSPWM1 has line-to-line voltage pulse reversals with small zero-voltage...
Adaptive control of DC link current in current source converter based STATCOM for improving its power losses
Karaduman, Ferdi; Ermiş, Muammer; Bilgin, Hazım Faruk; Department of Electrical and Electronics Engineering (2012)
In conventional three-phase PWM (Pulse Width Modulation) current source converter based STATCOM (Static Synchronous Compensator) applications, DC link current is kept constant at a predefined value and the reactive power of STATCOM is controlled by varying modulation index. This control strategy causes unnecessary power losses especially when the reactive power of STATCOM is low. For this purpose, in order to reduce the active power drawn by STATCOM, the modulation index can be maximized by adjusting DC lin...
A unity power factor buck type PWM rectifier for medium/high power DC motor drive applications
Bilgin, HF; Kose, KN; Zenginobuz, G; Ermiş, Muammer; Nalcaci, E; Cadirci, I; Kose, H (2000-10-04)
This paper describes the application of a single stage unity pf buck type PWM rectifier to medium and high power variable speed dc motor drives. The advantages of the developed system are low harmonic distortion in ac supply currents (comply with IEEE Std. 519 and IEC 555), nearly unity pf over a wide operating shaft speed range, nearly level armature -current and -voltage waveforms. These properties of output voltage and current quantities of the converter eliminate entirely any failure risk in current com...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
B. Çiftçi, “Selection of suitable PWM switching and control methods for modular multilevel converter drives /,” M.S. - Master of Science, Middle East Technical University, 2014.
