本文實際研製一應用於單級式獨立型太陽能發電系統之準Z源換流器。準Z源換流器為Z源換流器之改良型架構，兩者皆只需單級轉換器便可同時實現升壓以及直流/交流轉換兩項功能，準Z源換流器並具備體積小、低成本與高可靠度等優點，因此適用於單級式獨立型太陽能發電系統。此外，準Z源換流器相較於Z源換流器，其元件額定值較低且輸入電流為連續。太陽能最大功率追蹤與穩定輸出電壓為獨立型太陽能發電系統中兩項最主要的功能，由於準Z源換流器具有兩個可控量(即導通零態的時間Bduty以及振幅調變比ma)，因此本文提出一新型控制策略以同時完成太陽能最大功率追蹤與穩定輸出電壓等功能。本文完成之太陽能最大功率追蹤策略使用一般常用之擾動觀察法。此外，本文提出之導通零態的放置方式可減少功率開關於Bduty區間內所產生之熱。為了驗證所提出方法之正確性，本文設計一輸出電壓為 ，頻率為 ，功率為 之原型機。根據模擬與實驗量測結果，所設計之系統轉換效率均高於 ，而在所有測試條件下太陽能最大功率點追蹤準確度均高於 。此外本文提出之控制策略藉由調變Bduty與ma可同時達到最大功率追蹤與穩定輸出電壓等功能。

The design and implementation of a quasi-Z-source inverter (qZSI) for standalone photovoltaic generation systems (PGSs) is proposed in this thesis. The qZSI is derived from the traditional Z-source inverter, which can realize both DC voltage boost and DC-AC inversion simultaneously in a single stage. The advantages of using qZSI for standalone PGS include compactness, low cost, and higher reliability. In addition, qZSI offers several advantages over the ZSI, including lower component rating and continuous input current. For a standalone PGS, maximum power point tracking (MPPT) and stable output voltage are two main objectives of the system. However, there are two control variables, i.e. the shoot-through duty ratio (Bduty) and modulation index (ma), in a qZSI system. Therefore, a novel control scheme is also proposed in this paper to achieve both MPPT and voltage control in the same time. The MPPT method implemented in this thesis is a commonly utilized perturb and observe (P&O) method. In addition, a novel Bduty placement method is proposed to reduce the thermal stress of the power device. In order to validate the correctness of the proposed methods, a 110 VAC, 60 HZ, 500 W prototyping circuit is built. According to the simulation and experimental results, the measured conversion efficiency of the design system are all higher than 91 %, and the measured MPPT tracking accuracies are all higher than 97 % for all tested conditions. In addition, the proposed control scheme can regulate the shoot through duty ratio and the modulation index to achieve MPPT and maintain the output voltage magnitude simultaneously.

[1] Renewable Energy Policy Network for the 21st Century, Available at: http://www.ren21.net/.
[2] Fang Zheng Peng, “Z-Source Inverter,” IEEE Trans. Ind. App., Vol. 39, NO. 2, pp. 504-510, Mar./Apr. 2003.
[3] Fang Z. Peng, Miaosen Shen, and Zhaoming Qian, “Maximum Boost Control of the Z-Source Inverter,” IEEE Trans. Power Electron., Vol. 20, NO. 4, pp.833-838, Jul. 2005.
[4] Chandana Jayampathi Gajanayake, Mahinda Vilathgamuwa, and Poh Chiang Loh, “Development of a Comprehensive Model and a Multiloop Controller for Z-Source Inverter DG Systems,” IEEE Trans. Ind. Electron., Vol. 54, NO. 4, pp. 2352-2359, Aug. 2007.
[5] Zhi Jian Zhou, Xing Zhang, Po Xu, and Weixiang X. Shen, ” Single-Phase Uninterruptible Power Supply Based on Z-Source Inverter.” IEEE Trans. Ind. Electron., Vol. 55, NO. 8, pp. 2997-3004, Aug. 2008.
[6] Poh Chiang Loh, D. Mahinda Vilathgamuwa, Yue Sen Lai,, Geok Tin Chua, and Yunwei Li “Pulse-Width Modulation of Z-Source Inverters,” IEEE Trans. Power Electron., Vol. 20, NO. 6, pp. 1346-1355, Nov. 2005.
[7] Poh Chiang Loh, D. Mahinda Vilathgamuwa, Chandana Jayampathi Gajanayake, Li Tyan Wong, and Chiew Ping Ang, “Z-Source Current-Type Inverters: Digital Modulation and Logic Implementation,” IEEE Trans. Power Electron., Vol. 22, NO. 1, pp. 169-177, Jan. 2007.
[8] Poh Chiang Loh, Feng Gao, and Frede Blaabjerg, “Topological and Modulation Design of Three-Level Z-Source Inverters,” IEEE Trans. Power Electron., Vol. 23, NO. 5, pp. 2268-2277, Sep. 2008.
[9] Yan Zhou, Liming Liu, and Hui Li, “A High-Performance Photovoltaic Module-Integrated Converter (MIC) Based on Cascaded Quasi-Z-Source Inverters (qZSI) Using eGaN FETs,” IEEE Trans. Power Electron., Vol. 28, NO. 6, pp. 2727-2738, Jun. 2013.
[10] Dong Cao, Shuai Jiang, Xianhao Yu, and Fang Zheng Peng, “Low-Cost Semi-Z-source Inverter for Single-Phase Photovoltaic Systems,” IEEE Trans. Power Electron., Vol. 26, NO. 12, pp. 3514-3523, Dec. 2011.
[11] Yu Tang, Shaojun Xie, and Chaohua Zhang, “Single-Phase Z-Source Inverter,” IEEE Trans. Power Electron., Vol. 26, NO. 12, pp. 3869-3873, Dec. 2011.
[12] Long Huang, Ming Zhang, Lijun Hang, Wenxi Yao, and Zhengyu Lu, “A Family of Three-Switch Three-State Single-Phase Z-Source Inverters,” IEEE Trans. Power Electron., Vol. 28, NO. 5, pp. 2317-2329, May. 2013.
[13] 黃家偉，「適用於快速變動環境之太陽能最大功率追蹤技術研究」國立台灣科技大學電機工程系博士學位論文，民國101年7月。
[14] 翁敏航、楊茹媛、管鴻、晁成虎，「太陽能電池：原理、元件、材料、製程與檢測技術」東華書局，民國99年5月。
[15] 顧鴻濤，「太陽能電池元件導論：材料、元件、製程、系統」全威圖書，民國98年10月。
[16] M. F. Ishengoma and E. L. Norum, “Design and Implementation of a Digitally Controlled Stand-Alone Photovoltaic Power Supply,” Nordic Workshop on Power and Industrial Electronics, pp. 12-14, Aug. 2002.
[17] H. Patel and V. Agarwal, “Investigations into the Performance of Photovoltaics-Based Active Filter Configurations and their Control Schemesunder Uniform and Non-Uniform Radiation Conditions,” IET Renewable Power Gener., vol. 4, no. 1, pp. 12–22, Jan. 2010.
[18] S. H. Park, G. R. Cha,Y. C. Jung, and C. Y. Won, “Design and Application for PV Generation System Using a Soft-Switching Boost Converter with SARC,” IEEE Trans. Ind. Electron., vol. 57, no. 2, pp. 515–522, Feb. 2010.
[19] A. K. Abdelsalam, A. M. Massoud, S. Ahmed, and P. Enjeti, “High Performance Adaptive Perturb and Observe MPPT Technique for Photovoltaic Based Microgrids,” IEEE Trans. Power Electron., vol. 26, no. 4, pp. 1010–1021, Apr. 2011.
[20] G. J. Yu, Y. S. Jung, J. Y. Choi, and G. S. Kim, “A Novel Two-Mode MPPT Control Algorithm Based on Comparative Study of Existing Algorithms,” Sol. Energy, vol. 76, no. 4, pp. 455–463, Apr. 2004.
[21] H. Koizumi, T. Mizuno, T. Kaito, Y. Noda, N. Goshima, M. Kawasaki, K. Nagasaka, and K. Kurokawa, “A Novel Microcontroller for Grid Connected Photovoltaic Systems,” IEEE Trans. Ind. Electron., vol. 53, no. 6, pp. 1889–1897, Dec. 2006.
[22] 李政勳，「小型太陽光電能能量轉換系統之研製」國立中山大學電機工程系碩士學位論文，民國91年6月。
[23] 曾瀚陞，「應用回授擾動法則於換流器之調變與控制」國立中山大學電機工程系碩士學位論文，民國100年8月。
[24] Abraham I. Pressman, Keith Billimgs, and Taylor Morey, “Switching Power Supply Design,” McGraw-Hill Professional, 3 edition, pp. 547-551, Mar. 2009.
[25] Yang-wei Yu, Tian-jun Jin, Wen-tao Xie, and Zheng-yu Lv, “LC filter based on PWM inverter,” Mechanical. ＆ Electrical Engineering Magazine, vol. 24, no. 5, May 2007.
[26] Microchip Technology Inc., “dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04,” Available at: http://www.microchip.com
[27] 曾百由，「數位訊號控制器原理與應用」，宏友圖書開發股份有限公司，民國96年。
[28] Microchip Technology Inc., “dsPIC30F/33F Programmer’s Reference Manual,” Available at: http://www.microchip.com
[29] 楊宗振，「紅綠藍發光二極體背光驅動技術之研究」國立台灣科技大學電機工程系博士學位論文，民國101年7月。
[30] 賴文能、林國祥、高志暐，「數位信號處理」第三版，高立圖書有限公司，2007 年。
[31] 趙清風，「控制工程初階-使用MATLAB Simulink」，全華科技圖書，民國90 年12 月。