PWM rectifier

About: PWM rectifier is a research topic. Over the lifetime, 2254 publications have been published within this topic receiving 25614 citations.

Space vector modulation applied to three-phase three-switch two-level unidirectional PWM rectifier

Abstract: This work presents a methodology to apply space vector modulation to three-phase three-switch two-level Y-connected unidirectional PWM rectifier. Converter switching stages are analyzed to determine switches control signals for space vector modulation. A switching sequence is proposed to minimize the number of switches commutations. Rectifier models and vector control structure are also described. In order to validate the proposed modulation, experimental results are presented for a 20 kW prototype.

A novel direct power control strategy for three-level PWM rectifier based on fixed synthesizing vectors

Abstract: A novel direct power control (DPC) strategy for three-level neutral-point-clamped (NPC) pulse-width-modulation (PWM) rectifier, based on fixed synthesizing vectors, is proposed in this paper. The strategy breaks through the restrictions of vector switching with a simple switching table, improves the excellent dynamic performance of DPC, avoids the neutral-point voltage unbalance and the excessive voltage jumps in phase and line-to-line voltages of the rectifier, and guarantees the proper minimum pulse width and switching intervals between switches in different phases simultaneously. Experimental results verify the validity and feasibility of the proposed scheme.

Review of Exact Linearization Method Applied to Power Electronics System

Abstract: Power electronic switching converter is a typical nonlinear systems, it is difficult to solve the problem for power electronics system modeling and control by traditional linear control theory. With the development of power electronics and control theory, exact linearization method has been applied to power electronic systems. First, the basic mathematics of differential geometry is introduced. The basic knowledge and implementation conditions for single-input single-output(SISO) system's input- output linearization, single-input single-output system's state feedback linearization, multi-input multi-output (MIMO) system's state feedback linearization is also introduced. Second, the applications of the exact linearization method which is applied in the field for power electronic switching converters, three-phase PWM rectifier, inverter, active power filters(APF), motor control, is introduced. Finally, the exact linearization method in power electronics systems research trends is proposed.

Modeling, Design and Control of a Solar Array Simulator Based on Two-Stage Converters

Abstract: Power inverters for photovoltaic (PV) applications must be tested according to standards in order to be certified and commercialized. A common practice to test PV inverters is the utilization of solar array simulators (SAS). This paper presents a SAS topology based on a double-stage structure: The first stage is based on a three-phase PWM rectifier, and the second stage is based on a bidirectional buck converter. This structure is responsible to emulate the photovoltaic array behavior. A methodology to design the SAS components and control system parameters is presented. This methodology considers a range of operation points of the SAS. Additionally, it is verified that the dc-link capacitance of the inverter under test can affect the SAS dynamic behavior and its output current ripple. The results are divided into two parts: resistive loads and commercial inverters. Firstly, the SAS steady-state operation following the solar array I–V curve is demonstrated through simulation and experimental results, using resistive loads. In the second part, two commercial inverters with different nominal power and dc-link capacitance are considered. Using the proposed design methodology, the SAS topology operates correctly and the maximum power point tracker of the inverter under test is not affected if its input capacitance is within the design limits.

Three-Phase PWM Rectifier with Constant Switching Frequency

Abstract: Φ Abstract - In this paper, a novel adaptive hysteresis band current control technique based on predictive reasoning for three-phase PWM rectifier is presented. A simple and quick prediction of the hysteresis band is added to a phase-locked-loop control to ensure constant switching frequency and synchronization of modulation pulses independently on the system parameters. The proposed technique allows the advantages of quick response, robustness, good current tracking accuracy and minimal supply current ripples. The three-phase PWM rectifier has the characteristic of drawing nearly sinusoidal current with stable switching frequency and tight control of the position of modulation pulses. The simulation results show that the designed technique can improve three-phase PWM rectifier performance noticeably.