本文旨在研製一套太陽能最大功率追蹤之市電併網整合變頻器，並應用於三相市電併網與獨立供電系統。在市電併網中，我們可將可再生能源所輸出之功率賣回市電中。另一方面，當可再生能源輸出功率不足時,我們可從市電供應其電源給負載使用，本文所使用之可再生能源為太陽能電池。此再生能源系統包括了最大功率追踪直流-直流轉換器及太陽能電池仿真模擬機。
為了設計一優良之控制器，準確的數學模型是必要的，本文將提出一擴充矩陣模型，此擴充矩陣將優於傳統之方法狀態空間平均法。

This thesis has developed a three-phase inverter which is able to operate in a grid-connected mode and stand-alone mode. For grid-connected mode, the power from a renewable energy source (RES) can be sold to the grid. On the other hand, the ac power from the grid can be supplied to the load when the power of RES is insufficient. The RES converted in this thesis is a photovoltaic (PV) solar energy. The RES set up in this thesis consists of a DC-DC converter, an Maximum Power Point Tracking （MPPT） converter, and a PV emulator.
To have a good control design, an accurate converter model is required. In the thesis, we have proposed an augmented matrix method (AM).The method is very accurate compared to the conventional time-averaged model.

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