本論文旨在開發一以切換式磁阻馬達驅動之風力永磁同步發電機建立之雙極性直流微電網。首先，建構以非對稱橋式轉換器供電之切換式磁阻馬達驅動系統，採用磁滯控制以得強健之電流控制，抵抗反電動勢之影響。接著，再以換相移位與增壓控制，增強其性能。在速度控制方面，量化設計之速度回授控制器輔以簡易之強健控制，獲得良好之速度追控與負載調節特性。為使馬達驅動器經由市電供電，研製一三相維也納切換式整流器，採用單週期控制所得之功率因數矯正之控制性能，由一些實測結果驗證之。本文所使用之開關式磁阻馬達額定電壓較低，故於維也納切換式整流器後接一降壓式轉換器，建立合適電壓可升之馬達驅動系統直流鏈電壓。以一些結果展示所建降壓式轉換器，及市電供電之整體馬達驅動系統之操控特性。
接著，所建切換式磁阻馬達驅動器作為後接風力永磁同步發電機之原動機，所產生之電壓由一後接之維也納整流器轉換，控制建立微電網之直流匯流排電壓。維也納整流器亦採單週期控制以得快速之動態響應，可因應發電機變動之輸出電壓與頻率。無需交流輸入電壓感測及乘法運算。同時，雙極性匯流排之電壓由維也納切換式整流器自然建立之。為模擬水平軸風渦輪機之行為，依特定風渦輪機功率特性設計功率曲線，而最大功率曲線下之最大功率點擷取，經一些量測結果驗證。
最後，藉發電機後接維也納整流器建立之雙極性直流匯流排，建構一單相三線負載變頻器，於微電網至家用之獨立自主操作下，可對家用負載供電。再者，亦可成功執行微電網至電網及電網至微電網操作。經所採比例諧振控制器，獲得良好之弦波電流及電壓命令追控特性。於微電網至電網操作下，微電網可將預設功率經變頻器送回電網。相反地，經電網至微電網操作，電網可供給能量至微電網直流匯流排。為改善電力品質，加入對應奇次諧波電流之比例諧振控制器。

The thesis is emphasized on the development of a switched reluctance motor (SRM) emulator driven wind permanent-magnet synchronous generator (PMSG) based bipolar DC microgrid. First, the asymmetric bridge converter fed SRM drive is established. The hysteresis current-controlled PWM scheme is adopted to yield robust current control against the back-EMF effects. Moreover, the hysteresis current controller is further enhanced by applying the commutation shifting and voltage boosting approaches. As to the speed control, a quantitatively designed speed feedback controller is augmented with a simple robust control scheme to yield good speed tracking and load regulation responses. In order to power the SRM drive by utility grid, a front-end Vienna rectifier is employed. The power factor correction (PFC) performance using the one-cycle control (OCC) is examined experimentally. Since the employed SRM possesses low rated voltage (48V), a DC/DC buck converter is cascaded to the front-end Vienna rectifier to provide suited and adjustable DC-link voltage to the SRM drive. The designed buck converter and the whole utility grid powered SRM drive are evaluated their operation characteristics by measured results.
Then, the established SRM drive is utilized as a prime mover for driving the studied wind SPMSG. The PMSG generated AC voltage is processed through a followed Vienna rectifier. Again, the OCC is also applied for not only its fast dynamics and simplicity to yield good wind PMSG line drawn current, but also its ability to adapt to the fluctuated voltage frequency. No AC input voltage sensing and multiplying process are needed. The bipolar DC microgrid bus voltages are inherently established by the Vienna rectifier. Moreover, to simulate the behavior of a horizontal-axis wind turbine (HAWTs), the power curves according to the power characteristics of a specific wind turbine are designed. The extraction of maximum power points along the maximum power curve is verified by some measured results.
Finally, a single-phase three-wire (1P3W) load inverter is constructed, which is powered by the bipolar DC-bus built-up by the generator followed Vienna rectifier. The 1P3W inverter can power the household loads under M2H autonomous operation. Moreover, the microgrid-to-grid (M2G) and grid-to-microgrid (G2M) operations can also be successfully conducted. Good sinusoidal current and voltage command tracking characteristics are obtained by applying the proportional-resonant (PR) control. Under M2G operation, the inverter can send the preset power from the microgrid back to the grid. Conversely, the G2M operation allows microgrid DC-bus be supported energy from grid. To improve power quality, the independent PR controllers corresponding to odd harmonics of current are added.

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Torque Control
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E. Cascaded DC/DC Buck Converter
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F. Maximum Power Tracking Technique
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G. Fault Tolerance
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H. Load Inverter
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I. Grid Synchronization
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