A Carrier-Based Neutral Voltage Modulation Strategy for Multilevel Cascaded Inverters Under Unbalanced DC Sources

Cho, Younghoon; LaBella, Thomas; Lai, Jih-Sheng; Senesky, Matthew

doi:10.1109/tie.2013.2254091

Cited by 73 publications

(34 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 is equal to the conventional one in Fig.2 if the total dc-link voltage is unchanged, which indicates the maximum liner modulation index in the unbalanced case is also 1.15 [17] theoretically. The maximum liner modulation index of the proposed PWM will be analyzed in this section and then an effective solution based on the output voltage state transition will be proposed.…”

Section: Modulation Index Limitation Analysis and The Solutionmentioning

confidence: 85%

A Simplified PWM Strategy for a Neutral-Point-Clamped (NPC) Three-Level Converter With Unbalanced DC Links

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

A simplified PWM strategy for NPC three-level converter with unbalanced dc-links is proposed in this paper to achieve high quality line-to-line output voltages and to maximize the linear modulation range. The simplified strategy takes the direct output voltage modulation by calculating the special solutions of the voltage-second balance equations without detecting the position of the reference vector in the asymmetrical and complicated space voltage vector diagrams to reduce the calculation time. A novel solution based on the state transition is proposed to extend the maximum linear modulation index to 1.15. Furthermore, the asymmetric control of the split dc-link by the proposed PWM is implemented by adjusting the special solutions. Difference between the conventional SVPWM and the proposed strategy is conducted to illustrate the advantages of the simplified strategy. The effectiveness of the proposed modulation strategy is verified by simulation and experiment results.Index Terms-linear modulation range, NPC inverter, PWM, unbalanced dc-link.

show abstract

Section: Modulation Index Limitation Analysis and The Solutionmentioning

confidence: 85%

A Simplified PWM Strategy for a Neutral-Point-Clamped (NPC) Three-Level Converter With Unbalanced DC Links

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…In [30], a pulse width modulation strategy was proposed for the CHB operating under unbalanced dc sources. The strategy uses the injection of the offset voltages in the reference signals to compensate the output voltage imbalance caused by unbalanced dc source.…”

Section: Introductionmentioning

confidence: 99%

Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

Bressan¹,

Heldwein²,

Batschauer³

2017

Eletrônica de Potência

View full text Add to dashboard Cite

-This work proposes and analyzes modulation strategies for a hybrid three-phase multilevel inverter, which employs two different topologies in a cascade connection, a three-phase Neutral Point Clamped (NPC) converter and single-phase half-bridge converters. Two different modulation schemes are proposed: the hybrid modulation and the space vector modulation. The both modulation schemes can synthesize five voltage levels in the output phase voltage at the hybrid three-phase multilevel inverter with symmetrical dc sources. The modulation schemes operate the three-phase NPC in low-switching frequency and the half-bridge converters in high-switching frequency. Thus, semiconductors with low conduction losses can be used for three-phase NPC, decreasing the semiconductor losses. The hybrid three-phase multilevel inverter structure and modulation schemes are explained in detail and verified by simulation and experimental results.

show abstract

“…Various modulation techniques have been introduced to improve the performance of the MLIs [2] [11] [22]- [27]. The commonly used modulation techniques are selective harmonic elimination (SHE) [22]- [24] carrier-based PWM (CBPWM) [25] and space vector PWM (SVPWM) [26] [27]. In [28], the MLI performances of a SVPWM and a carrier based PWM are compared, and a carrier based PWM method is proposed to obtain an optimal output voltage in the MLI.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Control Strategy for BCD Topology Based Modular Multilevel Inverter

Karthikeyan¹,

Jamuna²

2016

View full text Add to dashboard Cite

In this paper, a Binary Coded Decimal (BCD) topology of modular multilevel inverter with reduced component count is proposed. For the control of this inverter, hybrid control strategy is used. The proposed modular multilevel inverter uses asymmetrical dc sources and reduced number of switches topology. This hybrid modulation technique uses the multicarrier based Pulse Width Modulation (PWM) and the fundamental frequency modulation strategy. The hybrid modulation algorithm is implemented with "NUC140" micro-controller. In comparison with the conventional and some of the recently reported inverter topologies, the proposed inverter topology is able to generate high number of voltage levels in the output by using minimum number of components such as dc sources, power switches and driver circuits. This inverter offers significant performance with less number of components. The feasibility of the proposed topology is confirmed by simulation and experimental results.

show abstract

A Carrier-Based Neutral Voltage Modulation Strategy for Multilevel Cascaded Inverters Under Unbalanced DC Sources

Cited by 73 publications

References 46 publications

A Simplified PWM Strategy for a Neutral-Point-Clamped (NPC) Three-Level Converter With Unbalanced DC Links

A Simplified PWM Strategy for a Neutral-Point-Clamped (NPC) Three-Level Converter With Unbalanced DC Links

Study of the Modulation Schemes in the Hybrid Three-Phase Multilevel Inverter

Hybrid Control Strategy for BCD Topology Based Modular Multilevel Inverter

Contact Info

Product

Resources

About