Overview of PI-Based Solutions for the Control of DC Buses of a Single-Phase H-Bridge Multilevel Active Rectifier

Dell’Aquila, A.; Liserre, Marco; Monopoli, Vito Giuseppe; Rotondo, Paola

doi:10.1109/tia.2008.921405

Cited by 181 publications

(72 citation statements)

References 13 publications

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“…In fact, there are applications where the dc voltage levels are meant to be equal but voltage unbalancing occurs because of unequal power loading [4] or unequal losses among the cascaded bridges [5]. To face such issues some balancing control methods have been proposed in the literature.…”

Section: Performance Comparison Of Variable-anglementioning

confidence: 99%

“…To face such issues some balancing control methods have been proposed in the literature. In particular, Dell'Aquila et al [4] and Barrena et al [6] propose to adjust the modulating signal, whereas Soto et al [7] investigates the injection of voltage/current components. Moreover, PSC-PWM itself is inherently unbalancing and for this reason a pulse rotation technique must normally be applied.…”

Section: Performance Comparison Of Variable-anglementioning

confidence: 99%

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Performance Comparison of Variable-Angle Phase-Shifting Carrier PWM Techniques

Monopoli

Buticchi

et al. 2018

IEEE Trans. Ind. Electron.

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Abstract-This paper analyzes the performances of different carrier phase-shifting pulse width modulation (PWM) techniques to be used with a multilevel cascaded H-bridge converter in case of unbalanced operational conditions. In fact, in many practical applications, the ideal condition of equal dc voltages and equal reference signals for each Hbridge cannot be achieved. In such conditions, the conventional carrier phase-shifting PWM technique loses its harmonic canceling capabilities and then the multilevel ac voltage harmonic quality is deeply affected. To overcome this limit of the original technique, different variations have been proposed. All of them still rely on the carrier phaseshifting concept and propose to use a different value of the shifting angle for each carrier (unlike the original technique) whenever unbalanced operational conditions occur. In this paper, the three main solutions proposed over the last years to extend the capabilities of the carrier phase-shifting PWM technique are compared. The analysis is focused on a three-cell cascaded H-bridge converter. Simulation and experimental results are presented.

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Section: Performance Comparison Of Variable-anglementioning

confidence: 99%

Section: Performance Comparison Of Variable-anglementioning

confidence: 99%

Performance Comparison of Variable-Angle Phase-Shifting Carrier PWM Techniques

Monopoli

Buticchi

et al. 2018

IEEE Trans. Ind. Electron.

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“…The major drawback of the CHB converter, working as a voltage source inverter, is the need for isolated power supplies. However, when it is used as an active rectifier, the topology is even more attractive because of the available distinct dc links feeding separate loads [8]. In the rectification mode, the CHB converter aims to establish N equal dc voltages across the capacitors.…”

Section: Introductionmentioning

confidence: 99%

“…But, these methods are not applicable in CHB rectifiers. In [7], [8], and [17], balancing of capacitor voltages and power factor correction have been realized for a rectifier with two series H-bridges, while the extension of theses methods to a higher number of series H-bridges is not straightforward. In [18], an energy-based approach has been applied to the control of an N-H-bridge active rectifier.…”

Section: Introductionmentioning

confidence: 99%

A Modular Strategy for Control and Voltage Balancing of Cascaded H-Bridge Rectifiers

Iman‐Eini

Schanen

Farhangi

et al. 2008

IEEE Trans. Power Electron.

189

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Abstract-In this paper, a new strategy for voltage balancing of distinct dc buses in cascaded H-bridge rectifiers is presented. This method ensures that the dc bus capacitor voltages converge to the reference value, even when the loads attached to them are extracting different amounts of power. The proposed method can be used for an arbitrary number of series H-bridges, different voltage levels, and different power levels in unidirectional or bidirectional rectifiers. To reduce the current harmonics and distortion, the input current is programmed to be sinusoidal and in phase with the input voltage; however, it is possible to adjust the input power factor to control both the active and reactive powers. In the proposed approach, both the low frequency (stepped modulation) and high frequency [pulse-width modulation (PWM)] switching methods are utilized to improve the performance of the rectifier. Using theoretical analysis, the acceptable load power limits for a rectifier with N-H-bridge cells are derived. The validity of the proposed method is verified by simulation and experimental results.

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“…However the advantage is that the output voltage references can be set independently. Several strategies to achieve the voltage balance can be found in the literature such as a passivity control strategy [11], non-linear control strategy [12], and strategies based on PI controllers [13].…”

Section: Introductionmentioning

confidence: 99%