Advanced Control Strategy for Single–Phase Voltage–Source Active Rectifier with Low Harmonic Emission

Abstract

This paper introduces the advanced control of single-phase voltage-source active rectifier. This control provide direct control of trolley-wire current and active damping of low-frequency disturbances at the converter ac side. Our proposed control strategy combines PR controller with feed-forward model and low-frequency harmonic compensator based on resonant controllers. Achieved experimental results show excellent converter behavior, where converter is fed by strongly distorted supply voltage.

Single-phase synchronization for traction active rectifier

“…This paper presented single-phase voltage synchronization based on SOGI-PLL structure. This type of voltage synchronization is very good solution for traction active rectifier, for example [11] - [13]. This synchronization is also suitable for use in advanced PV power station of low-power or for special single-phase power supply source [14] - [15].…”

Control of Multilevel Converter for AC Traction Substation with Power Symmetrization Unit

“…The direct current control is provide by PR controller and resonant controllers are used for harmonic compensation (for dead-time effect minimization). This method is well described in [16]. The voltage balancing is important during fast transient and is possible used some of these method [11], [17], [18].…”

Control of Grid Connected Modular Multilevel Converter

“…This resonant controller (R3rd) is in this case use as third harmonic compensator (for dead-time effect minimization). This method is well described in [10] or it is also possible to use filtration method described in [12] and [13]. The resulting value uv_m1_a enters into PWM modulator and firing pulses switch the first cell (H-bridge) of phase_a.…”

“…These requirements are difficult to achieve especially for non-symmetrical condition like two phase operation for single-phase ac grid ground short-circuit. In addition we want to ensure a very low current ripple therefore PS-PWM (phase shifted pulse-width modulation) is used with zero vector alternating, which is well described in [10]- [11].…”