具有改善太陽能最大功率追蹤之新型高升壓轉換器

本論文係提出一具有改善太陽能最大功率追蹤之新型高升壓轉換器，其中，係提出一種改良型之太陽能最大功率追蹤，其方法是在最大功率追蹤控制中加入一電壓與電流判斷式來減少於啟動時所造成之最大功率追蹤的誤判，進而縮短追蹤至最大功率點之時間。其次，於切換頻率不變的情況下，藉由可規劃邏輯閘陣列來降低脈波寬度調變訊號的解析度，以減少最大功率追蹤在最大功率點附近振盪所造成之功率損耗，但此方式將增加追蹤至最大功率點所須之時間，故必須在追蹤時間與功率損耗兩者之間做一抉擇。除此之外，本論文亦提出一新型升壓型轉換器，其特色為結合了電荷幫浦及能量疊加的觀念，藉此以提高電壓轉換比。於本論文中，首先藉由Matlab/Simulink模擬軟體來驗證所提之新型升壓型轉換器之可行性，緊接著採用Altera公司所生產之可規劃邏輯閘陣列晶片EP1C3T100C8來做為整體系統架構之控制核心，並以實驗來驗證所提之新型升壓型轉換器之有效性。最後，藉由Kernel公司所生產之太陽能模擬器PVS01203來驗證所提架構之有效性。

關鍵字

太陽能；高升壓轉換器；最大功率追蹤；可規劃邏輯閘陣列；全數位化

並列摘要

In this thesis, a novel voltage-boosting converter with solar maximum power point tracking (MPPT) improved is presented. For the proposed MPPT control to be considered, there is a voltage/current judgment algorithm to be added to the MPPT control algorithm, so as to reduce the error in MPPT judgment at startup and hence to reduce the time interval required by MPPT from the startup to the steady state. Furthermore, without changing the switching frequency, the oscillation in the vicinity of the maximum power point can be reduced so as to decrease the corresponding power dissipation, by reducing the pulse width modulation (PWM) resolution created from the field programmable gate array (FPGA). However, by doing so, the time interval required by MPPT from the startup to the steady state is to be increased. Consequently, a comparison between time interval and power dissipation is indispensable. On the other hand, for the proposed voltage-boosting converter, it combines the charge pump concept and different types of energy released in series at the same time to upgrade the voltage conversion ratio. In the thesis, first of all, the simulation software called Matlab/Simulink is used to verify the feasibility of the proposed converter. Secondly, the FPGA chip named EP1C3T100C8 made by Altera Ltd. is used as a control kernel of the overall system. Thirdly, some experimental results are provided to demonstrate the effectiveness of the proposed converter. Finally, via the PV simulator named PVS01203 made by Kernel Ltd., some experimental results are provided to verify the effectiveness of the proposed topology.

並列關鍵字

Solar ； Voltage-Boosting Converter ； Maximum Power Point Tracking ； FPGA ； Fully-Digitalized

參考文獻

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[3]Yu-En Wu and Chih-Lung Shen, “Implementation of a DC power system with PV grid-connection and active power filtering,” IEEE PEDG'10, pp. 116-121, 2010.

[4]Loc Nguyen Khanh, Jae-Jin Seo, Yun-Seong Kim and Dong-Jun Won, “Power-management strategies for a grid-connected PV-FC hybrid system,” IEEE Transactions on Power Delivery, vol. 25, no. 3, pp. 1874-1882, 2010.

[5]Chihchiang Hua and Chihming Shen, “Study of maximum power tracking techniques and control of DC/DC converters for photovoltaic power system,” IEEE PESC'98, vol. 1, pp. 86-93, 1998.

[6]J. H. R. Enslin, “Maximum power point tracking: a cost saving necessity in solar energy systems,” IEEE IECON'90, vol. 2, pp. 1073-1077, 1990.

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具有改善太陽能最大功率追蹤之新型高升壓轉換器

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