Single-Phase AC–DC–AC Three-Level Three-Leg Converter

Freitas, Isaac Soares de; Jacobina, Cursino B.; Silva, E.R.C. da; Oliveira, T.M.

doi:10.1109/tie.2010.2043042

Cited by 42 publications

(11 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The desired input voltage, v * g , to be synthesised by the converter is defined by the control system of the controlled rectifier. The main structure used for controlled rectifiers is based on two control loops: a dc-link voltage outer loop, and a current inner loop [7]. The outer loop regulates the dc-link voltage while the inner loop tracks the reference current with unity power factor.…”

Section: B Pwm Strategy For the Single-phase Convertermentioning

confidence: 99%

See 1 more Smart Citation

A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters

Freitas

Bandeira

Barros

et al. 2015

IEEE Trans. on Ind. Applicat.

Self Cite

View full text Add to dashboard Cite

In this paper is presented a pulse-width-modulation (PWM) technique with neutral point capacitor voltage balancing in single-phase neutral-point-clamped (NPC) converters. The technique is based on the injection of a common mode voltage signal into the sinusoidal modulating signals of the conventional carrier-based PWM. Although several strategies have been reported for such a problem by using the voltage signal injection, the proposed method is very simple with easy implementation. It is presented a set of equations to demonstrate how the injected voltage signal introduces a dc component on the neutral-point current, which can be controlled in order to allow the capacitors voltages balancing.

show abstract

Section: B Pwm Strategy For the Single-phase Convertermentioning

confidence: 99%

“…Moreover, they are also an interesting solution for low-voltage power converters [3]- [5] including single-phase systems [6], [7]. A major drawback associated to the single-phase NPC converters is the neutral-point voltage fluctuation caused by transients or even during normal operations due to the system imperfections.…”

Section: Introductionmentioning

confidence: 99%

A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters

Freitas

Bandeira

Barros

et al. 2015

IEEE Trans. on Ind. Applicat.

Self Cite

View full text Add to dashboard Cite

show abstract

“…To increase the total efficiency of the system one can implement different topologies among the system like 2-Level Voltage Source Converters (VSC) with a special PWM method or 3-Level VSC which has the inherent advantages over the former one. Studies in [4][5][6][7] state that 3-Level topologies have the advantage of better voltage waveforms, lower total harmonic distortion, lower power device ratings and lower dV/dt stress. However, in 3-Level topology the complexity of the system increases due to higher number of elements used.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Modulation Techniques of a Grid Side Converter in a Wind Energy Conversion System

Ozkilic¹,

Obdan²,

Sarul³

2016

Automatika Journal

View full text Add to dashboard Cite

“…To increase the total efficiency of the system one can implement different topologies among the system like 2-Level Voltage Source Converters (VSC) with a special PWM method or 3-Level VSC which has the inherent advantages over the former one. Studies in [4][5][6][7] the advantage of better voltage waveforms, lower total harmonic distortion, lower power device ratings and lower dV/dt stress. However, in 3-Level topology the complexity of the system increases due to higher number of elements used.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Modulation Techniques of a Grid Side Converter in a Wind Energy Conversion System

2016

View full text Add to dashboard Cite

Original scientific paperIn this article, the grid side converter of a low power on-grid WECS has been investigated where two Pulse Width Modulation techniques -Space Vector Pulse Width Modulation (SVPWM) and Discontinuous Pulse Width Modulation (DPWM)-applied to compare switching losses of semiconductors and THD of the system. For this purpose, SIMULINK/MATLAB simulation was run to calculate the THD of the grid current in inverter operation at the grid side converter. Also the switching instances of the active elements have been determined and Visual Basic based program has been used to calculate the switching losses at these instances. The results have shown that, SVPWM has better THD performance over DPWM at the same switching frequency. However, by carefully selecting the switching frequency of DPWM higher than that of SVPWM without increasing the switching losses of DPWM beyond the switching losses of SVPWM, it is possible to find switching frequency values at which DPWM can have better THD performance. Usporedba tehnika modulacije mrežnog pretvarača u sustavu pretvorbe energije vjetra. U ovomčlanku se istražuje mrežni pretvarač male snage na mreži WECS. Primijenjene su dvije tehnike modulacije širine pulsa -modulacija širine pulsa korištenjem vektorskog polja (SVPWM) i isprekidana modulacija širine pulsa (DPWM) kako bi se usporedili gubici prilikom prebacivanja poluvodiča i THD-a sustava. Iz tog razloga napravljena je Simulink/Matlab simulacija kako bi se izračunao THD mrežne struje prilikom inverterskog rada mrežnog pretvarača. Takoer slučajevi prebacivanja aktivnih elemenata su ustanovljeni i napisan je program u Visual Basicu kako bi se izračunao gubitak u tim slučajevima. Rezultati pokazuju da SPWM ima bolje performanse THD-a u odnosu na DPWM prilikom iste frekvencije prebacivanja. Meutim, pažljivim odabirom više DPWM frekvencije prebacivanja od SVPWM-a te uz izbjegavanje povećanja gubitaka prebacivanja kod DPWM-a iznad gubitaka prebacivanja SVPWM-a moguće je naći frekvenciju prebacivanja kod koje DPWM ima bolje THD performanse.Ključne riječi: Isprekidana modulacija širine pulsa, Gubici prebacivanja kod poluvodiča, Ukupna harmonijska distorzija, Sustavi pretvorbe energije vjetra

show abstract

Single-Phase AC–DC–AC Three-Level Three-Leg Converter

Cited by 42 publications

References 44 publications

A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters

A Carrier-Based PWM Technique for Capacitor Voltage Balancing of Single-Phase Three-Level Neutral-Point-Clamped Converters

Comparison of Modulation Techniques of a Grid Side Converter in a Wind Energy Conversion System

Comparison of Modulation Techniques of a Grid Side Converter in a Wind Energy Conversion System

Contact Info

Product

Resources

About