再生能源，如太陽能、風能等，以其取之不竭、用之不盡，又無環保問題等特性，因此風能及太陽能可說是目前最具有發展潛力的兩種再生能源。在台灣由於風能與太陽光能恰具有互補特性，故本論文之研究重點即在於研究與市電並聯之光伏及風力混成發電系統，以提高再生能源之利用率及發電效率。

本文首先提出一適用於光伏及風力混成發電系統架構，僅需採用二組三臂六開關之IGBT（Insulated Gate Bipolar Transistor）模組，較傳統架構可減少使用的開關數目並縮小硬體空間，且多餘一臂亦可當作備用之開關。其次利用虛功來建立及穩定直流鏈的電壓，作為有效整合不同類發電系統之基礎，而其額外的優點便是不需消耗到實功，又可完全將光伏及風力所產生的實功能量完全饋入市電，以達到較佳的轉換效率。本論文隨後並以能量守恆的觀念，導演出混成系統之動態模式，並將反流器的控制規劃為四個控制模式，根據不同控制模式，設定不同之直軸電流命令，方便整合成混成系統的輸入命令，並可保持其快速之響應。在混成系統之操作方面，本論文提出五個操作模式的概念，即啟動模式、正常運轉模式、緊急模式、電力品質控制模式及停機模式，藉由流程化的操作，以提高混成發電系統之可靠度。最後並完成一硬體雛型，並經由實驗結果驗證該系統之可行性。

Wind energy and solar energy, due to their inexhaustible supply and environmentally clean characteristic, are probably two kinds of most potential renewable energy for recent development. In Taiwan area, the solar energy is quite rich during the day while the wind energy is usually available during the night. Hence, it is the main objective of this thesis to focus on the implementation of a photovoltaic (PV) and wind power hybrid generating system to enhance the utilization rate and efficiency of the system. Also, in order to reduce the installation cost, the concerned hybrid system is supposed to be connected to the grid system.

Basically, the contributions of thesis may be summarized as follows. First, a new configuration of a grid connected PV and wind power hybrid generating system is proposed. Only two three-phase Insulated Gate Bipolar Transistor (IGBT) modules are required for implementing the ten active switches to achieve more compact volume and higher reliability. Second, the dc link voltage is stabilized by controlling the reactive power from the grid system and served as a basis for integrating the control of different renewable energy source. Third, by using the concept of conservation of energy, a dynamic model of the proposed hybrid generating system is derived and four control modes are defined to achieve the corresponding d-axis current commands for integrating into a total input command of the hybrid system. Since the real power control is independent of the reactive power control of the dc link voltage, fast response together with better power quality control can be achieved. Fourth, as far as the operation of the hybrid system is concerned, five operation modes, namely, the starting mode, normal operation mode, emergent control mode, power quality control mode and the shut down mode, are defined for convenient control and maintenance of the hybrid system. Finally, a prototype is constructed and experimental results are presented for verifying the feasibility of the proposed hybrid system.

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