具切換式整流器前級數位控制模組化變頻器之開發

本論文旨在研製切換式整流器供電之模組化數位變頻器及從事其控制。在探究瞭解一些既有切換式整流器之比較特性後，設計製作一簡易三相單開關切換式整流器，以為變頻器前端交流/直流轉換器。藉由妥善之控制器設計，使其建立之直流鏈電壓為可調升及具良好調節特性。結果顯示所建之變頻器具良好之輸出電壓波形追控以及良好之交流入電電力品質。在模組化數位變頻器開發方面，先建構以數位信號處理器為主之高性能單相變頻器。所提之電流及電壓波形控制機構含迴授控制器、命令前向控制器及簡易之強健擾動消去控制器。更進一步，本論文提出一強健補償控制機構，以降低由變壓器不平衡激磁所生之非線性效應。接著，本文研製由二個或三個單相變頻器模組接成之三相變頻器，含 -接、Y-接、V-接、Scott-T接等。在具良好波形追控之變頻器下，本文亦研究其任意規劃波形追控性能。實測結果顯示在未知及變動之負載下，所研製之單相及三相變頻器具有良好及強健之輸出波形追控特性。另外，本文亦從事在傳統整流器以及切換式整流器供電下變頻器之操作性能比較評估。關鍵詞：變頻器、單相、三相、數位控制、數位信號處理器、波形控制、強健控制、變壓器激磁不平衡、切換式整流器、 Delta-接、Y-接、V-接、Scott-T 接。

關鍵字

變頻器；單相；三相；數位控制；數位信號處理器；波形控制；強健控制；變壓器激磁不平衡；切換式整流器； Delta-接； V-接； Scott-T 接

並列摘要

The major purposes of this thesis lie in the development of switch-mode rectifier (SMR) fed modular digital inverters and making their controls. After exploring the comparative features of some existing SMRs, a simple three-phase single-switch SMR is designed and employed as an AC/DC front-end converter for the followed inverters. And the suitable control scheme is developed to establish the boostable and well-regulated DC-link voltage. It follows that the inverter output performance is improved with line drawn power quality are obtained. As to the development of modular digital inverters, the design and implementation of high performance digital signal processor (DSP) based single-phase inverter module are first made. The proposed sophisticated current and voltage waveform control schemes consist of feedback, command feedforward and simple robust disturbance cancellation controls. Moreover, a simple robust compensation control approach is proposed to reduce the nonlinear effects caused by transformer flux imbalance. With the developed single-phase inverter module, the establishment of three-phase inverters using two or three modules is studied. The studied three-phase inverters include Y-, -, V- and Scott-T connected inverters. Finally, after establishing the inverters having good waveform tracking characteristics, the arbitrary waveform tracking control is studied. Some measured results show that the designed inverters possess good and robust waveform tracking performance under unknown and varying loads, and they also possess good programmable waveform tracking capability. Moreover, some comparative performance evaluations of the inverters fed by the conventional rectifier and the developed SMR are made. Key words: Inverter, single-phase, three-phase, digital control, DSP, waveform control, robust control, transformer flux imbalance, switch-mode rectifier, Delta-connected, Y-connected, V-connected, Scott-T connected.

並列關鍵字

Inverter ； single-phase ； three-phase ； digital control ； DSP ； waveform control ； robust control ； transformer flux imbalance ； switch-mode rectifier ； Delta-connected ； Y-connected ； V-connected ； Scott-T connected

參考文獻

A. Basics of inverters

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[6] H. Deng, R. Oruganti, and D. Srinivasan, “Modeling and control of single-phase UPS inverter: A survey,” in Proc. PEDS, 2005, pp. 848-853.

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具切換式整流器前級數位控制模組化變頻器之開發

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