單台 Vienna 整流器在本質上屬於非雙向功率潮流之電路拓樸，受限於電網側電流流經前端升壓電感所引發之感抗壓降，極易導致輸入電流極性與極電壓發生不匹配，進而使輸入電流於零交越點產生波形失真。隨著工業界對高輸出功率轉換器之需求日益殷切，單台 Vienna 整流器之架構已不足以應付高負載產業應用，因而促使交錯並聯型拓樸逐漸成為主流。然而，縱使系統操作於並聯型 Vienna 整流器架構下，電流零交越失真問題依舊無法完全規避；若進一步導入直流側上下臂電壓主動不平衡控制，更將導致零交越區間輸入電流與極電壓之極性不匹配現象愈發嚴重，甚至反向引發輸出側直流電壓於零交越點附近產生劇烈擾動。有鑑於此，本文提出一種兼顧電網側輸入電流與直流側輸出電壓的控制策略。該策略在無需頻繁調節載波移相角度的前提下，能有效抑制輸入電流的零交越失真，並降低直流輸出電壓的擾動，從而確保系統具備良好的交流側電流品質與直流側穩態響應。最後，本文建置一台 2.5 kW 之並聯型三相 Vienna 整流器實驗平台進行實機驗證，並詳實對比傳統不連續脈衝寬度調變（Discontinuous Pulse Width Modulation， DPWM）技術與所提策略於輸出主動不平衡情況下之輸入電流總諧波失真（THD）與直流側電壓品質。;A Vienna rectifier inherently exhibits a unidirectional circuit topology. Due to the in-ductive voltage drop induced by the grid-side current flowing through the front-end boost inductor， a polarity mismatch between the input current and the pole voltage easily occurs， thereby yielding current waveform distortion at the zero-crossing points. With the growing industrial demand for high output power rating， the standalone Vienna rectifier architecture has become insufficient for high-load industrial applications， thereby driving the interleaved parallel topology to gradually become mainstream. Nevertheless， even when the system op-erates under the parallel Vienna rectifier architecture， the issue of current zero-crossing dis-tortion remains inevitable. If active unbalance control for the DC-link top and bottom ca-pacitor voltages is further introduced， the polarity mismatch within the zero-crossing region is further aggravated， which can even conversely induce severe fluctuations in the output DC voltage near the input current zero-crossing points. To address these challenges， this paper proposes a control strategy that simultaneously suppresses the grid-side input current zero-crossing distortion and mitigates the DC output voltage oscillation without requiring frequent adjustments to the carrier phase-shift angle， thereby eliminating AC-side input current zero-crossing distortion and ensuring a stable DC-side output voltage steady-state performance. Finally， a 2.5 kW parallel three-phase Vi-enna rectifier experimental platform is established for hardware verification. The input cur-rent total harmonic distortion (THD) and the DC-link voltage quality are comprehensively compared between the conventional discontinuous pulse width modulation (DPWM) tech-nique and the proposed strategy under active unbalanced output voltage conditions.
