Modeling and analysis of common-mode voltages generated in medium voltage PWM-CSI drives

Rodríguez, José; Morán, L.; Pontt, J.; Osorio, R.; Kouro, Samir

doi:10.1109/tpel.2003.810855

Cited by 67 publications

(35 citation statements)

References 9 publications

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“…The concept of reversible power flow direction of one polarity can be realized only by adding an anti-parallel switch to the diodes [4,5], or through bidirectional diodes (four diodes), which achieve bidirectional flow [6]. Bidirectional-type converters are suitably used in adjustable speed drives (ASDs) [7,8] and in battery charging of uninterruptible power supplies (UPSs) [5].…”

Section: Introductionmentioning

confidence: 99%

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

2014

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This paper presents a modified sinusoidal pulsewidth modulation (SPWM) switching technique in threephase ac-dc buck converter with new modulation strategy. The modulation strategy used two reference signals (0 • -60 • and 120 • -180 • sine wave) and one type of carrier signal, instead of two types of carrier signal to generate pulse-width modulation signals. A conventional 6-switch three-phase acdc buck converter is extended by comprising four diodes in each switch to achieve bidirectional power flow capability. A digital feedback voltage control using two-degreesof-freedom-control approach is implemented to achieve the output voltage to equal the reference voltage with high dynamic performance and to obtain sinusoidal ac current with unity power factor. The modified SPWM switching strategy of ac-dc power flow and vice versa is discussed and verified via mathematical model. The validity of the proposed three-phase ac-dc buck converter with bidirectional A. Alias

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Section: Introductionmentioning

confidence: 99%

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

2014

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“…If not properly controlled, it may shorten the motor insulation life expectancy. The CMVs in CSC-fed drives have been modeled and investigated in [3]. As a passive solution to the CMV issue, the integrated dc-link choke proposed in [4] is used to undertake the CMV.…”

Section: Introductionmentioning

confidence: 99%

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Zhu

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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Common-mode voltages (CMVs) can lead to premature failure of the motor insulation system in medium-voltage (MV) current source drives. This paper proposes a novel space-vector modulation (SVM) based gating strategy that can significantly reduce the peak CMV by optimizing the switching sequences for MV current source converters (CSCs). In the proposed method, the switching sequence of one side of the CSC is fixed and the sequence of the other side is selected to produce the minimum peak CMV. The optimization process is based on the CMV calculation for all the possible switching sequence combinations. To validate the proposed concept, different SVM based control schemes for CSCs are investigated. The results show the effectiveness of the proposed concept. In addition, the proposed strategy can be easily implemented in software and requires no extra hardware. By using this method, the CMV stress of the motor is reduced significantly and the size/weight for the common-mode choke can also be reduced.

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“…Concerning phenomena of partial discharges activity, references [8] and [9] discuss the topics of electric stress and failure mechanism of insulation windings. References [8], [10], [11], [12], [13] present the discussion of partial discharges measurement and the effect of common mode voltages. References [14], [15], [16] present the main standards and guidelines for measurements and testing.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Stator Earth Fault Protection System of a Medium Voltage Converter-Fed Synchronous Motor

Pontt

Vargas

2010

2010 IEEE Industry Applications Society Annual Meeting

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For grinding applications cycloconverter-fed gearless mill drives are being applied with increasing powers and new risks emerge with the systems scaling-up. Traditional parasitic second order effects may be not neglected, like thermal expansions, electromagnetic effects and EMC emissions. In this frame, harmonics and partial discharges of windings in medium voltage converter-fed machines build additional leakage current background that masks eventual phase insulation failures or produce nuisance trips in the protective system. Despite these perturbations, for reliable operation, the electrical protection system must detect properly a phase-to-ground fault of the motor in the 100% length of stator winding with the trade-off between sensitivity ad insensitivity. This work presents a study and discussion based on modeling and simulation for assessing the limitations and range of application of a 100% earth fault protection configuration, considering the operation of this protection acting also as earth leakage protection.

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Modeling and analysis of common-mode voltages generated in medium voltage PWM-CSI drives

Cited by 67 publications

References 9 publications

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

DSP-Based Modified SPWM Switching Technique with Two-Degrees-of-Freedom Voltage Control for Three-Phase AC–DC Buck Converter

Common-mode voltage reduction for medium-voltage current source converters by optimizing switching sequences

Analysis of a Stator Earth Fault Protection System of a Medium Voltage Converter-Fed Synchronous Motor

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