Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/288601
Title: Studies on application of repetitive control for eliminating harmonic voltages from PWM inverter’s output
Researcher: Marati, Naveenkumar
Guide(s): Prasad, Dinkar
Keywords: Engineering
Engineering and Technology
Engineering Electrical and Electronic
University: Shiv Nadar University
Completed Date: 2017
Abstract: Inverters are most common power electronic circuits used in systems like uninterruptible power supplies, electric motor drives, distributed power generation etc. It is mandatory to keep the total harmonic distortion in the output of most inverters below the limits prescribed by different international standards. Non-linear and high crest factor loads at inverter output are the major cause for output voltage distortion. The harmonic distortions caused due to nonlinear loads may not get corrected by typical magnitude controller, like PID controller. Repetitive controller is more effective in such situations. Often, repetitive controller is used as add-on block to the conventional magnitude controller. Design of repetitive controller can be easily implemented on digital platform. This work is devoted to study, analysis, design and experimental verification of a repetitive control scheme suitable for single-phase Sine-PWM inverter. The thesis starts with literature survey and goes on to analyzing and suggesting modifications over a popular repetitive control scheme. The suggested modifications result in good improvement in efficiency of the closed-loop controlled inverter. It also results in simplification of the controller design. Though the modification requires addition of an extra hardware filter, the cost and size of this extra filter is negligible. The suggested scheme is analyzed and experimentally verified. Design aspects of the controller have been presented and effect of parameter changes have been analyzed. Stability aspect of the proposed controller is dealt with in good detail. Most of the theoretical analysis is supported by experimental results. The experimental results as well as theoretical analysis point to the capability of proposed controller in improving the output quality of inverters feeding non-linear loads. Some limitations of repetitive controller is also discussed. The thesis also proposes a novel experimental method for verifying the efficacy of repetitive controller in suppressing distor
Pagination: xxiii, 156p
URI: http://hdl.handle.net/10603/288601
Appears in Departments:Department Of Electrical Engineering

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01_title page.pdf103.18 kBAdobe PDFView/Open
02_certificate.pdf25.31 kBAdobe PDFView/Open
03_preliminary pages.pdf357.07 kBAdobe PDFView/Open
04_chapter 1.pdf155.86 kBAdobe PDFView/Open
05_chapter 2.pdf204.21 kBAdobe PDFView/Open
06_chapter3.pdf625.9 kBAdobe PDFView/Open
07_chapter 4.pdf796.64 kBAdobe PDFView/Open
08_chapter 5.pdf7.33 MBAdobe PDFView/Open
09_chapter 6.pdf46.06 kBAdobe PDFView/Open
10_references.pdf95.34 kBAdobe PDFView/Open
80_recommendation.pdfAttached File426.79 kBAdobe PDFView/Open


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