以半橋反流器實現光電能 最大功率追蹤控制

Abstract

本文描述以太陽能電池在最大功率追蹤(MPPT)下供給市電能量之系統，以回授電流於三階層升壓電路以實現太陽能最大功率追蹤，並且感測電容電壓解決三階層升壓電路中之上下電容電壓不平衡之問題。在太陽能電池經由三階層電路維持最大功率輸出以及上下電容電壓平衡之下，經由後級直流交流反流器切換出與市電電壓同相位之市電電流供給市電能量。本文以FPGA (Field Programmable Gate Array)晶片硬體電路實現全部的演算法及控制器。實驗結果以功率600W的太陽能電池展現其效能。

In this thesis, the three-level boot converter is connected to the half-bridge inverter to implement the grid-tie photovoltaic condition system. Compared to boost converter, the three-level boost converter is able to boost the dc voltage and balance both capacitor voltages. Thus, in the grid-tie application, the three-level converter needs to achieve MPPT control and voltage balance control. All the algorithms and controllers are implemented in Field Programmable Gate Array (FPGA). Experimental results obtained on a 600W prototype show the performance.