本文旨在研製具有雙向功率轉換功能之單相交流-直流功率轉換器及三臂型直流-直流功率轉換器，作為蓄電池充電及放電使用，以完成蓄電池的儲能系統。文中利用單相交流-直流功率轉換器將市電側電壓轉換為直流電壓，此直流電壓可提供負載及蓄電池儲能，同時亦可作為蓄電池放電之市電併網使用。蓄電池充電及放電採用三臂型直流-直流功率轉換器，其主要的工作模式有降壓模式及升壓模式。降壓模式下，利用三臂均流控制及交錯式脈波寬度調變控制，直流鏈電壓對蓄電池組進行充電。在升壓模式下，將儲存在蓄電池組的能量送回直流鏈側。本文採用零點偵測電路取得市電側交流電壓之零交越點，控制其輸出電流與市電側電壓同步，如此電池儲能系統能夠達到高功率因數、低電流諧波，並能吸收與提供功率予市電端。
　　本文已建立功率轉換器之數學模型，為數位控制器之設計依據，系統以數位信號處理器(DSP, TMS320LF2808)為系統控制核心，藉由電壓回授及電流回授電路將資料回送至數位信號處理器作運算，市電側之交流-直流功率轉換器及三臂直流-直流功率轉換器之控制策略皆由C語言完成。實測結果顯示，在單相市電側之交流電壓為110V，蓄電池端電壓為144V之情況下，直流鏈電壓為200V，已完成300W之蓄電池組儲能測試。

This thesis is to study the single-phase ac-dc power converter and the multi-phase bi-directional dc-dc power converter, which can control the charging and discharging of the batteries, it thus can be used to build the energy storage system. The single phase ac-dc power converter is used to convert the power from the grid to stable dc-link voltage. This stable voltage can not only supply power for the operation, but also charge the batteries. It can also release power to the grid at the same time. The multi-phase bi-directional dc-dc power converter, which is placed between the battery pack and dc-link, is used to charge and discharge the power of battery pack. There are two main working modes: the buck mode and the boost mode. In the buck mode, three-leg equal-current control and interleaved pulse-width modulation control method are used to charge the battery. In the boost mode, the power in the battery pack is released to the dc-link. Zero-cross detecting circuit is introduced to acquire the zero-cross point of the grid power, forcing the current command to be synchronized with the grid power. The battery energy storage system can absorb and deliver the power to the grid.
　　In this thesis, the mathematic model for the power converter has been established. The digital signal processor TMS320LF2808 is used as the control core. The voltage and current sensing circuits feed the data to the controller. This thus combines with the control strategies of power converter to complete the whole system. Besides, C language is used for the control of the battery energy storage system. A 400W energy storage system is built. Experimental results show that a dc-link voltage of 200V is obtained with the input voltage of 110V and battery voltage of 144V.

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