本文提出短路電流感測法實現最大功率點追蹤之太陽光電發電系統。文中，太陽能板最大功率點電流之決定，可藉由量測感測電池短路電流來完成。利用太陽能板(或感測電池)最大功率點電流與其短路電流為線性關係，推導出太陽能板之最大功率點電流與感測電池之短路電流的關係式，藉此關係式，太陽能板於任意工作條件下之最大功率點電流即可獲得。經實驗系統的實測，其結果顯示短路電流感測法所決定之電流因數為0.92時，確實可讓太陽能板獲得較正確的最大功率輸出，另一方面，所設定的太陽能板增/減載增益值為1.65時，能讓高日照條件、中日照條件及低日照條件下的太陽能板於增/減載過程中均能獲得適宜的反應，從而獲致較正確的最大功率輸出。文中，以Matlab/Simulink的即時控制系統來完成太陽光電發電系統之控制，此舉簡化了控制系統之複雜度。透過實驗系統的實測結果，確認研究方法的有效性。

A short-circuit current sensing based maximum power point tracking (MPPT) for photovoltaic (PV) generation systems is suggested in this paper. The maximum power point (MPP) current of a solar panel is derived from sensing the short-circuit current of a sensing cell. The linear relationship between the MPP current and the short-circuit current in the solar panel (or in the sensing cell) is used to derive a relative formula between the MPP current of solar panels and the short-circuit current of sensing cells. The MPP current of the solar panel under any operating condition will be given by using this formula. Through the practical measurement of the experimental system, the results show that the solar panel can indeed obtain a more accurate maximum power output when the current factor determined by the short-circuit current sensing method is 0.92. On the other hand, when the set load increase / decrease gain value for the solar panel is 1.65, the solar panels under high sunshine conditions, medium sunshine conditions and low sunshine conditions can obtain appropriate responses during the load increase/decrease process. This results in a more accurate maximum power output for PV generation systems. The Matlab/Simulink real-time control system is taken to control the photovoltaic generation system and to simplify the complexity in control systems. The effectiveness of the research method is confirmed by the actual measurement results of the experimental system.