近年來許多國家投入智慧電網發展，以及各式新興產業都需要
倚賴智慧電網，如電動車、再生能源、大型儲能之應用都是在智慧
電網架構下的產業，而微電網技術為智慧電網的一環，透過微電網
整合分散式的再生能源，依據用戶的負載進行協調運轉，能夠使電
網的整體運作更有效率，而微電網在智慧電網技術中主要關鍵技術
為高壓直流輸電網，由於高壓直流輸電網常有併網之需求，對於合
併各個電網系統可透過功率級硬體迴路應用驗證，因此高輸入電壓
之多階層轉換器即適合此場合應用。
本論文提出一適用於高輸入電壓場合之三階層飛馳電容式轉換
器，使用此架構主要是用以透過飛馳電容來使得功率開關元件應力
降為輸入電壓的一半，而以藉此可選擇較低耐壓之功率開關，使元
件成本也隨之降低，在電感電流上具有等效兩倍開關頻率的特點，
由此即可減少輸出電感及輸出電容的大小，獲取更高的功率密度。
本論文為穩定飛馳電容電壓加入電壓平衡控制及在開機前針對飛馳
電容預充之電路，使得開關上電壓穩定於 0.5Vdc，並設計補償器控
制輸出回授，探討輸出回授與飛馳電容電壓控制之關係，利用計算
及模擬來驗證系統之設計結果，使實作之系統可以達到開關切換頻
率為 200 kHz，輸出為 500 Hz 之具有 650 Vdc+347 Vrms規格之三階層
飛馳電容式轉換器。

In recent years, many countries have invested in the development of
smart grids, and various emerging industries need to rely on smart grids,
such as electric vehicles, renewable energy, and large-scale energy storage.
The first link is to integrate distributed renewable energy through the microgrid and coordinate the operation according to the user's load, which
can make the overall operation of the power grid more efficient. The power
transmission grid often needs to be connected to the grid. For the integration of various grid systems, it can be verified through the application of
the power stage hardware circuit, so the multi-level converter with high
input voltage is suitable for this application.
This theies proposes a three-level flying capacitor converter suitable
for high input voltage applications. This structure is mainly used to reduce
the stress of the power switching element to half of the input voltage
through the flying capacitor, so as to select a lower The voltage-resistant
power switch reduces the cost of components, and has the characteristic of
twice the switching frequency of the inductor current, which can reduce
the size of the output inductor and output capacitor, and obtain higher
power density. In this paper, a circuit of voltage balance control and precharging of the flying capacitor is added to stabilize the voltage of the flying capacitor, so that the voltage on the switch is stable at 0.5Vdc, and the
compensator is designed to control the output feedback, and the relationship between the output feedback and the voltage control of the flying capacitor is discussed. Calculation and simulation are carried out to verify
the design results of the system, so that the implemented system can
achieve a three-level flying capacitor converter with a switching frequency
of 200 kHz and an output of 500 Hz with a specification of 650Vdc+347
Vrms.

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