Zero‐sequence voltage injected fault tolerant scheme for multiple open circuit faults in reduced switch count‐based MLDCL inverter

Vemuganti, Hari Priya; Sreenivasarao, Dharmavarapu; Ganjikunta, Siva Kumar

doi:10.1049/iet-pel.2017.0472

Cited by 9 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, their inability to synthesize output voltage for subtractive combination dc-sources limits their ability for trinary voltage ratios. The modular and redundant structure of MLDCL allows to tolerate multiple open-circuit (OC) faults on certain devices in level generator [141]. In [142], a modified MLDCL configuration is reported for grid integrated PV system by replacing by-pass switches in the level generator of MLDCL with diodes.…”

Section: Topologies With Separate Level and Polarity Generatormentioning

confidence: 99%

A Survey on Reduced Switch Count Multilevel Inverters

Vemuganti¹,

Sreenivasarao

Ganjikunta

et al. 2021

IEEE Open J. Ind. Electron. Soc.

Self Cite

102

View full text Add to dashboard Cite

An efficient and cost-effective power converter is a pre-requisite for the modern power applications. With the evolvement of matured medium power self-commutated switching devices, multilevel inverters (MLIs) are emerged as a promising solution for high-power medium-voltage applications. Though, MLIs are performing a promising role in industrial applications, their high device count, size, cost and control complexity have restricted their market penetration. To address the disadvantages of MLIs, researchers are continuously contributing to new generation topologies under the name of reduced switch count (RSC) MLIs. From the past decade, numerous RSC-MLIs topologies have been reported for various applications. Therefore, this paper presents a comprehensive review and classification of RSC-MLI topologies, in terms of their structure, features, limitations, suitability and selection for specific applications..

show abstract

Section: Topologies With Separate Level and Polarity Generatormentioning

confidence: 99%

A Survey on Reduced Switch Count Multilevel Inverters

Vemuganti¹,

Sreenivasarao

Ganjikunta

et al. 2021

IEEE Open J. Ind. Electron. Soc.

Self Cite

102

View full text Add to dashboard Cite

show abstract

“…Interphase DC voltage balancing of cascaded H-bridge with star configuration is regulated by zero-sequence voltage injection or negative-sequence voltage/current injection [16,17]. STATCOM function of SST, negativesequence reactive power compensation, should be considered in the whole control.…”

Section: Interphase Power Characteristicsmentioning

confidence: 99%

“…Lu et al [15] proposed a zero-sequence voltage-based interphase voltage balancing method for STATCOM. However, this method has not taken into account the unbalanced factors in the grid side and its regulation ability is relatively weak [15][16][17], so it is limited in the cascaded SST.…”

Section: Introductionmentioning

confidence: 99%

A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

Ji¹,

Sun²,

Jin³

et al. 2019

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

Cascaded solid-state transformer (SST) can be directly connected to the high-voltage distribution grid, and it has broad applications in the future smart grid, traction locomotive, and renewable energy integration. However, the reliability of the cascaded SST is seriously influenced by the DC voltage and power imbalance issues with this configuration. This paper presents a coordinated DC voltage control strategy for cascaded SST with star configuration, in which the average DC voltage and the balancing DC voltage are controlled separately without current sensors in dual active bridge (DAB) modules. This strategy not only reduces the cost and the complexity of the control system but also realizes the unbalanced reactive compensation to some extent. Simulation and experimental results verify the feasibility and validity of the proposed method.

show abstract

“…Recently many researchers have been focusing on developing different MLI topologies including FT capability with the incorporation of minimum components [9–12]. The conventional cascaded H‐bridge MLI achieves FT operation by connecting relays at appropriate locations [13], but this topology needs more number of DC voltage sources, switching devices, and relays.…”

Section: Introductionmentioning

confidence: 99%

Loss study and reliability analysis of a new reconfigurable fault‐tolerant multilevel inverter topology

Saketi

Chaturvedi

Yadeo

et al. 2020

IET power electron.

View full text Add to dashboard Cite

A high reliable inverter with photovoltaic systems improves the efficiency and longevity of the entire system. Recent research emphasises on developing new fault‐tolerant multilevel inverter (FTMLI) topologies. However, these topologies are not able to maintain rated voltage and power with a minimum switch count under switch fault conditions. This study proposes a new multilevel inverter with a reduced device count, which can handle both single switch fault and multi‐switch fault by preserving its rated voltage and power. Sine‐carrier‐based level‐shifted pulse‐width modulation is used to generate control signals. The carriers are reconfigured based on the type and location of the fault. The loss contribution of each switch is calculated in all modes of operation by considering variations in junction temperature using a Powersim (PSIM) thermal model tool. This study helps to choose an appropriate heat sink for the switches. The reliability density function is calculated using a Markov chain model. A comparative study is presented to assess the notable benefits of the proposed topology over other existing similar topologies. The experimental results from the laboratory prototype are provided to verify the efficacy and practicality of the proposed FTMLI configuration.

show abstract

Zero‐sequence voltage injected fault tolerant scheme for multiple open circuit faults in reduced switch count‐based MLDCL inverter

Cited by 9 publications

References 27 publications

A Survey on Reduced Switch Count Multilevel Inverters

A Survey on Reduced Switch Count Multilevel Inverters

A coordinated DC voltage control strategy for cascaded solid state transformer with star configuration

Loss study and reliability analysis of a new reconfigurable fault‐tolerant multilevel inverter topology

Contact Info

Product

Resources

About