本文旨在研製太陽能發電系統。在太陽能電池方面，使用直流/直流功率轉換器及增量電導法控制，使太陽能電池達到最大功率追蹤控制，提高太陽能能量轉換效率。另外，文中蓄電池採用直流/直流功率轉換器作為充、放電控制，用以維持太陽能與負載之間功率平衡，並提供穩定直流電壓予負載。最後，系統利用三相三階層變流器作為直流/交流能量轉換之用，一方面可減少輸出電壓之諧波含量，另一方面可將能量轉變成交流電源，供給三相獨立負載或連結至電力網路。
本文建有功率轉換器數學模式，並利用MATLAB/Simulink模擬軟體分析系統，作為數位控制器之設計依據。實體製作方面，採用以高性能、低成本的數位信號處理器(DSP, TMS320LF2407A)為整體系統之控制核心，減少硬體電路成本。本系統已完成2300W的獨立供電系統及市電並聯系統，並由實驗驗證理論分析。在獨立運轉下，固定輸出有效值為220V之線電壓，其頻率為60Hz。在市電並聯下，可提供實功率及虛功率至電力網路。此外，整體系統之運轉效率為95%，而三相三階層變流器輸出線電壓之總諧波失真率為2.3%，符合IEEE Std. 519之規範。

關鍵字：太陽能電池、增量電導法、三相三階層變流器。

This thesis presents the development of a solar power generating system. The dc/dc boost power converter and incremental-conductance algorithm are to achieve optimum power output and enhance conversion efficiency. In addition, a dc/dc buck/boost chopper is designed to charge or discharge batteries in order to regulate the power flow between solar cells and system loads so that it can supply stable dc power to system loads. Finally, a three-phase three-level inverter is proposed to convert dc power into ac power and reduce the output voltage harmonics. The system realized can be operated either in a stand-alone fashion or connected with power grid.
In this thesis, the digitized mathematical model and controller design are built and simulated by MATLAB/Simulink. Then, a high-performance, low-cost digital signal processor (DSP, TMS320LF2407A) is used to implement the system for reducing the circuit components and cost. Experimental results for 2300W hybrid power conversion system are given to justify the analysis. The rated line-voltage is 220V and the frequency is 60Hz. Besides, the experimental results show that the efficiency of the whole system reaches 95% and voltage harmonic distortion of three-phase, three-level power inverter output is 2.3%, which complies with IEEE Std. 519.

Keyword: solar cells, incremental-conductance algorithm, three-phase three-level inverter.

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