Comparison of harmonics and common mode voltage in NPC and FLC Multilevel converters

Hoosh, B. Moghimian; Zaimeddine, R.; Undeland, Tore

doi:10.1109/epepemc.2010.5606787

Cited by 8 publications

(1 citation statement)

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“…A larger number of voltage levels, relative to the twolevel topology, with the same values of filter elements, can achieve smaller voltage and current THD [12].…”

Section: Medium Voltage Convertermentioning

confidence: 99%

Review of multilevel converters for application in solid state transformers

Gajowik¹

2017

ELECTROTECHNICAL REVIEW

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This paper presents an overview of AC-DC, DC-AC and DC-DC power converter topologies used in the context of the application of solid state transformers. It describes the features of individual solutions, with an emphasis on multi-level topologies connected to the medium voltage AC grid, what allows to apply commonly available and relatively inexpensive low-voltage semiconductor switches. Such systems maintain high efficiency as well as high switching frequency, resulting in reduction of converter passive elements volume and weight as well as overall price. Streszczenie. Niniejszy artykuł przedstawia przegląd topologii przekształtników energoelektronicznych AC-DC oraz DC-DC, pod kątem zastosowania w energoelektronicznych transformatorach inteligentnych. Opisano w nim cechy poszczególnych rozwiązań, ze szczególnym naciskiem na przekształtniki wielopoziomowe, które pracując wraz z siecią elektroenergetyczną średniego napięcia (SN), umożliwiają zastosowanie standardowych i stosunkowo tanich niskonapięciowych łączników półprzewodnikowych, a także zmniejszenie rozmiarów, wagi i ceny transformatora. (Przegląd topologii przekształtników wielopoziomowych pod kątem zastosowania w inteligentnym transformatorze).

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“…A larger number of voltage levels, relative to the twolevel topology, with the same values of filter elements, can achieve smaller voltage and current THD [12].…”

Section: Medium Voltage Convertermentioning

confidence: 99%

Review of multilevel converters for application in solid state transformers

Gajowik¹

2017

ELECTROTECHNICAL REVIEW

View full text Add to dashboard Cite

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Reduced switching loss based DC-bus voltage balancing algorithm for three-level neutral point clamped (NPC) inverter for electric vehicle applications

Choudhury

Pillay

Amar

et al. 2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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A performance comparison study for two proposed DC-bus voltage balancing algorithms is carried out, with a threelevel NPC based permanent magnet synchronous machine (PMSM) drive for the electric vehicle propulsion application. Both the control algorithms are able to keep the two DC-link capacitor voltage variation within a tolerance level with wider range of speed and torque variation of the load drive cycle. However, with the second proposed control strategy inverter total switching losses can be reduced considerably, compared to the first proposed strategy. Both the losses are then compared with a conventional two-level inverter, with a wider variation in switching frequency. Results show a significant reduction in total inverter losses at higher switching frequencies with three-level inverter. Both the two-and three-level inverter control strategies are developed using space-vector pulse width modulation (SV-PWM) scheme. The switching and conduction loss distribution in different switches and diodes for both the two-and three-level inverters are also studied. Finally the total voltage harmonic distortion (%THD v ), percentage torque ripple (%T rip ), and capacitor voltage fluctuation (%V caprip ) are also compared. Switching losses are calculated in a PLECS environment using data sheet parameters from Infineon and control logics are developed in MATLAB/ Simulink. For this study a 110 kW surface-PMSM is considered. A scaled down prototype is built in laboratory for both the inverters and tested with a 6.0 kW surface-PMSM. Both the simulation and experimental results show satisfactory performance of the proposed system.

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