Application of hybrid delta modulation for control of single-phase voltage source active rectifier

This contribution deals with a competitive control of the single-phase voltage source active rectifier based on a hybrid delta modulation. Main advantages of the presented control are a constant switching frequency of the converter, a direct control of the grid ac current and a harmonic grid current independent from waveform of the grid voltage. Proposed control is verified by simulations as well as by experiments made on designed laboratory prototype of active rectifier of rated power of 1.75kVA.