A Linearized Time-Invariant Voltage-Sensorless Direct Power Control for Three-Phase Vienna Rectifiers

In this paper, a linearized time-invariant voltage-sensorless direct power control (DPC) with balanced and unbalanced dc-link voltage is proposed in three-phase Vienna rectifier. To achieve sensorless voltage, the architecture consists of three sub-architectures, including 1) linear control; 2) virtual flux, input active reactive estimators; 3) zero crossing distortion capacitor unbalance compensations under single carrier pulse-width modulation (PWM) operation. The method transfers system from time-varying to by algebraic transformation, which makes design controller more directly. can reduce cost lower current total harmonic does not require use phase-locked loop (PLL). A 2.4kW prototype constructed some simulation experimental results are offered verify validity method.