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PWM rectifier

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


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Journal ArticleDOI
TL;DR: In this paper, an analytical expression for the instantaneous output power has been derived, which provides the link between the output dc link voltage and the instantaneous power, and a simple cascaded PI control scheme has been developed for the dc output voltage control.
Abstract: This paper proposes the analysis of the instantaneous power flow of three-phase pulse-width modulation (PWM) boost rectifier under unbalanced supply voltage conditions. An analytical expression for the instantaneous output power has been derived, which provides the link between the output dc link voltage and the instantaneous output power. A direct relationship between the dc link voltage ripples and the second harmonic component in the instantaneous output power has been established. Based on the input and output instantaneous power analytical expressions provided, the presence of the odd order harmonic components in the ac line currents can be explained. A simple cascaded PI control scheme has been developed for the dc output voltage control. The controller ensures that the dc link voltage is maintained constant and the supply side power factor is kept close to unity under the unbalanced supply voltage operating conditions. Simulation and experimental test results are provided on a 1.6-kVA laboratory-based PWM rectifier to validate the proposed analysis and control scheme.

73 citations

Journal ArticleDOI
Lijun Hang1, Sensen Liu1, Gang Yan1, Bo Qu1, Zhengyu Lu1 
TL;DR: In this paper, a model of deadbeat current controller for the grid-side three-phase boost pulsewidth modulation (PWM) rectifier was presented, based on which the inherent relationship among predictive algorithms, current overshoot, and phase delay was obtained by analyzing three widely used predictive algorithms in different kinds of reference variations.
Abstract: The model of deadbeat current controller for the grid-side three-phase boost pulsewidth modulation (PWM) rectifier was presented in this paper. Based on this model, the inherent relationship among predictive algorithms, current overshoot, and phase delay was obtained by analyzing three widely used predictive algorithms in different kinds of reference variations. Then, a novel scheme to select the prediction parameter in deadbeat controller was proposed to improve the performance. By using the fuzzy control strategy, a proper predictive parameter was chosen, which not only limits the maximum current overshoot, but also adjusts the phase delay. Both the transient and the steady characteristic of the proposed controller were validated by the simulation results. Finally, an experimental prototype of a three-phase voltage-source PWM rectifier controlled by a TMS320F2812DSP was built and tested. The experimental results verified the validity of the proposed control approach.

68 citations

Proceedings ArticleDOI
30 Sep 2008
TL;DR: In this article, a technique for analysing aircraft frequency wild power systems with constant power loads is developed and demonstrated, where the authors deal with stability analysis of a three-phase frequency-wild AC power system with a constant power load fed through a vector-controlled front-end PWM converter.
Abstract: In this paper a technique for analysing aircraft frequency wild power systems with constant power loads is developed and demonstrated. Power electronic based loads often behave as constant power loads, especially when feeding machine or actuator drives under current and speed control. The constant power (CP) loads can affect the stability of the power system. The problem is a particular issue in aircraft power systems as the proportion of CP loads increases with the advent of the more-electric aircraft. This paper deals with stability analysis of a three-phase frequency-wild AC power system with a CP load fed through a vector-controlled front-end PWM converter. The mathematical model suitable for stability analysis is derived using the DQ-transformation method. It is shown how the proposed approach can be applied to study the power system behaviour under different loads and parameters variations, as well as to assess the power system stability margins. The study is supported by intensive simulations that verify the reported theoretical results.

68 citations

Journal ArticleDOI
TL;DR: In this paper, a fault diagnosis and fault resilient control strategy for catenary current and dc-link voltage sensor faults in the control system for an electric traction single-phase PWM rectifier is presented.
Abstract: Single-phase pulse-width modulation (PWM) rectifier is commonly used in a high-speed railway electric traction system. Occurrence of unexpected failure in the sensors of the detection system may lead to feedback values deviation and system degradation, which can be extremely detrimental to the operation safety of the electric locomotive. This paper presents a fast and reliable fault diagnosis and fault resilient control strategy for catenary current and dc-link voltage sensor faults in the control system for an electric traction single-phase PWM rectifier. Sliding mode observers are designed to produce analytical redundancy. In order to avoid unobservable states and fluctuation introduced by discrete dynamics in observer design, a novel description for switching variables is presented in system modeling. Normalized residuals are generated using measured and observed values. The fault diagnosis unit proposed can detect and isolate three types of sensor faults online by comparing residuals with thresholds. System reconfiguration is realized by substituting the observed values for the information of faulty sensors. Simulation and experimental results are demonstrated to validate the effectiveness of the strategy.

67 citations

Proceedings ArticleDOI
23 Jun 1996
TL;DR: In this paper, the stationary operational behavior of a three-phase/switch/level PWM rectifier is analyzed for asymmetrical loading of the output partial voltages, and the maximum admissible load of the neutral point (capacitive output voltage center point) is calculated.
Abstract: In this paper the stationary operational behavior of a three-phase/switch/level PWM rectifier is analyzed for asymmetrical loading of the output partial voltages. For the considerations a sinusoidal mains current shape, resistive behavior of the mains current fundamental and constant pulse frequency are assumed. Based on analytical calculations it is shown that the average value of the neutral point current (which has to be formed for asymmetrical load) has an approximately linear dependency on the distribution of the overall relative on-time of the switching states of the system being redundant concerning the voltage formation between begin and end of a pulse half interval. The maximum admissible load of the neutral point (capacitive output voltage center point) is calculated. This load is given as a function of the amplitude of the mains current and the voltage transfer ratio of the system. The calculations are checked by results of a digital simulation of the system behavior. Furthermore, the increase of the rms value of the ripple of the mains current of the rectifier is analyzed as it results in forming of an average value of the neutral point current. As a basis for comparison, the ripple rms value is used which results in harmonic-(sub)optimal control and negligible average value of the neutral point current. Finally, the current stress on the power semiconductors and on the output capacitors of the system are compiled in the form of diagrams which can be applied directly for dimensioning the system.

67 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202326
202267
202145
202095
2019133
2018112