終端滑模控制在太陽能最大功率追蹤之研究

Terminal Sliding Mode Control for Maximum Power Point Tracking of Photovoltaic Power Generation Systems

古展宇(Chan-Yu Ku)

指導教授 ： 邱謙松

中原大學/工學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6840/cycu201000065

摘要

摘要
本論文之目的在於發展太陽能最大功率控制轉換系統。為使太陽能板具有最大的輸出效能，本論文採用直流/直流升壓型轉換電路(DC-DC Boost Converter)做為功率調節電路，使用增量電導法搜尋太陽能板最大功率點後，設計其終端滑動控制器(Terminal sliding mode controller, TSMC)進行最大功率點電壓之追蹤。其優點為可以提供有限的系統追蹤收斂時間，並保有滑動模式控制的強健性。進一步地，當考慮被動元件存在參數的不確定性，終端滑動控制器亦可保證其強健性。
為驗證所提出的控制方法，首先利用Matlab模擬強健性終端滑動控制器應用於太陽能光電系統之最大功率追蹤，由模擬結果可知在任何照度下，太陽能發電系統皆可提供最大功率。接著進行太陽能最大功率控制實驗；由製作直流-直流升壓型電源轉換器後，並利用dSPACE DS1104 控制單板及Matlab進行實驗。由模擬與實作的比較結果，PI控制器在系統中會產生大幅度的振盪，無法收歛至定值；而終端滑動控制令系統可在有限內收斂至目標值，且系統對參數變化及外在擾動雜訊具有強健性。依實作結果，太陽能光電整體系統約可提升209%的功率輸出，使整體系統具有更佳的效能。

關鍵字

升壓型電源轉換器 ； 滑動模式控制 ； 參數不確定 ； 最大功率點 ； 太陽能

並列摘要

Abstract
The purpose of this thesis is to develop the maximum power controller of solar energy conversion systems. To enable the output of solar panels with the greatest efficiency, this thesis we use DC/DC boost converter circuit (DC/DC Boost Converter) as the power regulation circuit. After searching the maximum power point of the solar panel from the incremental electrical conductivity method, we design a terminal sliding mode controller (TSMC) for tracking the maximum power point voltage. The advantages of this thesis is the closed-loop system with finite convergent time and high robustness. Especially, the TSMC guarantees robustness to modeling uncertainty.
To verify the validity of the proposed control method, we carry out simulations and experiments for the maximum power tracking of the solar system. From the simulation and experimental comparison, the PI controlled solar system will generate oscillations . In contrast, the terminal sliding mode controlled solar system converges to the target value in finite time and has high robustness. According to the results, the TSMC controlled PV system can improve about 209% efficiency of the power output, ie., the overall system has better performance.

並列關鍵字

terminal sliding mode ； boost Converter ； Solar energy ； maximum power point

參考文獻

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