本論文旨在設計、製作及模擬一部由PIC16F73 精簡指令集控制單晶片所調變之直流激磁控制系統，該激磁系統是應用於風力用感應同步發電機之轉子繞組上，完成該發電機在獨立發電與市電併聯雙模式下之激磁控制。透過該單晶片高速調變該直流激磁量，可使該發電機在獨立發電時可補償負載之壓降，在市電併聯時則可調整發電機之輸出功因。
本文的實體控制研究，是在實驗室一部300 W繞線型轉子感應發電機組上完成，以分析該發電系統在正常運轉下以及欠相及不平衡條件下之工作特性。由穩態及暫態分析以及數學模擬和ADX 3000電力/諧波分析儀實測結果，可以驗證本文所提出的直流激磁控制系統應用在感應同步發電機系統上，於獨立發電時確實可提高加載能力，在市電併聯時則可有效改善系統輸出的功因。

The purpose of this thesis is to design, implement, and simulate the DC excitation control of a wind induction synchronous generator (WISG) under isolation generation and grid connection using a reduced instruction set chip (RISC) of PIC16F73. The proposed DC excitation control of the studied WISG is by means of transferring the generated AC voltage of the generator into a controlled DC signal through a rectifier and a DC-DC buck converter in order to supply the desired DC excitation to the rotor winding of the WISG. Due to the microchip’s high-speed modulation, the voltage drop under isolation generation mode can be effectively compensated while the proper power-factor regulation under grid connection mode can be achieved.
The studied WISG system is practically implemented in a laboratory 300 W wound-rotor induction generator under three-phase balanced, phase failure, and unbalanced operating conditions. From steady-state and transient results as well as simulated and field measured results using ADX 3000 power/harmonic analyzer, it can be concluded that the output capacity of the WISG can be effectively promoted under isolated operation and the output power-factor can be properly improved under grid connection.

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