近年來由於全球暖化與空汙議題發酵，再生能源發電量占比也日漸增高，其中，最具代表性的光伏發電以及風力發電皆屬於間歇性電力，為了提高電力品質，可利用儲能系統儲存再生能源之多餘電力，並在用電高峰時釋能，以此有效提高總體能源使用率。
由於常規諧振式轉換器皆有一個共同點，即無論功率流方向為何，其諧振電流和諧振電壓皆具正弦交變特性。因此，諧振式轉換器可適用於實現安全迅速的功率流轉換。
此外，為達成安全轉態之要求，本論文提出一種基於調節磁化電流之控制法，該控制法可有效降低雙向轉換器轉態區間之開關電流、諧振電容電壓，並以實驗波形及SIMPLIS軟體模擬結果佐證。最後，本論文研製一雙向直流-直流CLLC諧振轉換器，其電網端電壓為DC 200V、儲能端電壓為DC 48V、額定功率為1 kW，且只需要15.7 μs即可完成功率流轉換。

In recent years, due to the global warming and air pollution issues, the proportion of renewable energy generation has been increasing. However, the most typical photovoltaic (PV) generators and wind turbines are usually intermittent. In order to improve power quality, the energy storage systems (ESSs) can be introduced. The ESSs can store excess electricity at time of low electrical demand and release energy at time of high electrical demand. Therefore, the overall energy utilization could be increased.
The conventional resonant converters have common characteristics that resonant currents and resonant voltages are always alternating no matter what directions of power flow are. Therefore, resonant converters could be suitable to implement safe and rapid power flow transferring.
This thesis discusses a control method which is implemented by magnetizing current regulating. It could effectively reduce the current stresses of the power switches and the voltage stresses of the resonant capacitors in power flow transferring stage. The proposed control method will be verified by simulation and experiment results. A bidirectional DC-DC CLLC resonant converter is implemented, which high side DC bus voltage is 200 V, low side battery voltage is 48 V, rated power is 1 kW, and only requires 15.7 μs to complete power flow transferring.

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