本論文的主要研究為應用於微電網系統之高效能雙向直流/直流轉換器，選用的架構為雙向半橋式非隔離型直流/直流轉換器，利用脈波寬度調變的控制方式，使功率開關具備零電壓切換功能。本論文亦針對此架構提出新型的控制機制，其概念為隨著輸出功率的改變，對功率開關加入相移控制，大幅地降低峰值電流與有效值電流，提升輕載時的轉換效率，達到全範圍負載高效率之目標。在充電策略方面則根據不同的電池電壓，採用不同的定電流充電，並搭配定電壓浮充模式。本論文選用德州儀器的數位信號處理器TMS320F28035實現電路數位化的目標，並實作出一台10 kW高效能雙向直流/直流轉換器，將本論文提出的相移機制經過理論推導與實作測試，全範圍負載效率在放電模式下皆在90%以上；在充電模式下皆在95%以上。

This thesis presents a high-performance bidirectional DC/DC converter for micro-grid system applications. The topology is used by the non-isolated half-bridge DC/DC converter. Zero-voltage-switching (ZVS) of power switch is realized with pluse width modulation method. Otherwise, a novel control mechanism is also proposed in this thesis. The concept is added phase-shift mechanism to control at power switch following different output power. Significantly reduces the peak current and RMS current to improve the conversion efficiency at light loads and achieve high efficiency under wide-range load variations. When charging the battery, the constant-current and constant-voltage charging method are satisfied the demands for fast charging. Therefore, a multi-stage charging method depending on the battery voltage is adopted. A digital signal processor (DSP) TMS320F28035 of Texas Instruments is used to implement a 10-kW bidirectional DC/DC converter. The phase-shift mechanism proposed in this thesis through theory and practice tests to verify its feasibility. After complete the tests, the overall load efficiency are above 90 % in discharge mode and above 95 % in charge mode.

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