A Control Strategy for a Vienna Rectifier Under Phase-Lack Faults

Aviation power systems require extremely high reliability. As a result, rectifiers must be capable of continuing operation during phase-lack faults, where the input voltage of one phase drops to zero. However, traditional fault-tolerant strategies often struggle to maintain effective control under these conditions. To address this issue, this paper proposes a single-phase control strategy specifically designed for the Vienna rectifier, a commonly used component in aerospace power systems. This strategy ensures a stable DC output during phase-lack faults while maintaining low total harmonic distortion and a near-unity power factor. Simulation results confirm the effectiveness of the proposed control method.