近年來隨著功率需求提高，將多個直流-直流轉換器模組並聯為一種有效且快速的方法，因此本論文提出了由雙主動全橋式(Dual-Active-Bridge, DAB)轉換器組成之輸入並聯輸出並聯(Input-Parallel Output-Parallel, IPOP)系統。由於電路參數不匹配會導致系統功率不平衡，為了改善此問題，對現有的均流控制法進行比較。基於IPOP 系統模組化之需求，選擇了自動主僕均流控制(Automatic Master-Slave Current-Sharing Control)做為系統之均流控制法。此外，本論文基於單相移(Single-Phase-Shift, SPS)調變法分析了其小訊號模型，並根據迴路增益之推導設計其數位控制器，達到閉迴路控制。最後，研製一輸出功率120 kW、輸入及輸出電壓750 VDC 之IPOP 雙主動全橋式轉換器，並完成了輸出功率20 kW 實測。在實驗結果中，平均電流之均流誤差率維持在測試最大輸出負載電流±8%以內，電壓調整率維持在規格輸出電壓±0.1%以內。

With the increasing power requirements in recent years, paralleling multiple DC-DC converter modules is an effective and quick method. Therefore, this thesis proposes an input-parallel output-parallel (IPOP) system composed of dual-active-bridge (DAB) converters. Since the circuit parameters mismatch, it will cause power imbalance. To improve this problem, compared to existing current-sharing control methods. Based on the modularization requirements of the IPOP system, the automatic master-slave current-sharing control is selected. In addition, this thesis analyzes small-signal model of automatic master-slave current-sharing control based on the single-phase-shift (SPS) modulation, and designs digital controller according to the derivation of the loop gain to achieve closedloop control. Finally, design and implement an IPOP DAB converter with output power of 120 kW, input and output voltage of 750 VDC, and complete the experiment of output power of 20 kW. In the experimental results, the average current-sharing error is within ±8% of the testing fullload condition, and the voltage regulation is within ±0.1% of the specified output voltage.

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