Three-Phase Four-Wire AC–DC–AC Multilevel Topologies Obtained From an Interconnection of Three-Leg Converters

Maia, Ayslan C. N.; Jacobina, Cursino B.; Freitas, Nayara B. de; Queiroz, Antonio de Paula Dias; Silva, E.R.C. da

doi:10.1109/tia.2018.2843352

Cited by 21 publications

(4 citation statements)

References 18 publications

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“…These losses are related to maximum reverse current (I rm ), reverse voltage (V dr ), switching frequency (f s ) and reverse recovery time (t rr ). (31) In each cycle of the input voltage, two MOSFETS and two diodes operate at a high frequency, so the total switching losses in this interval for the suggested work and converting topology reported in [38] during the inverting operation, and in [37] during the non-inverting and inverting operation are realized in (32) and (33) respectively. (33) For any value of the duty ratio, the switching losses of the proposed topology are low, as it has low switching voltage and current.…”

Section: ) Switching Lossesmentioning

confidence: 99%

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A New Single-Phase AC Voltage Converter With Voltage Buck Characteristics for Grid Voltage Compensation

et al. 2020

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Voltage sags and swells are the major problems of the power distribution system that arise due to uneven distribution of the single-phase and nonlinear loads. They severely degrade the power quality and may cause the failure of the equipment at the user's side. The voltage sag and swell issues are compensated by operating the AC voltage controllers with bipolar voltage gain characteristics. In these converters, high switching voltage and current, and a large number of switching devices are the main issues that cause unwanted power losses and result in reduced efficiency of the system. High voltage stresses may cause device failure due to the increase in dv/dt rating. The large count of switching devices results in high cost and high conversion losses. So here, we propose a novel AC converter with fewer switching devices that reduces switching voltage and current to have low conversion losses. The amplitude of the output is governed through the direct PWM control (DPWM) of one switch that controls the switching state of the other switch indirectly called indirect PWM control switch (IDPWM). The detailed analysis of the proposed converter is carried out to compare its performance with the existing converters. MATLAB/Simulink environment-based simulation results are proved through the experimental results obtained by developing a hardware prototype. INDEX TERMS Bipolar voltage gain, power distribution system, power quality, PWM control, switching and conduction losses, switching voltage, voltage sag and swell.

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Section: ) Switching Lossesmentioning

confidence: 99%

“…They have the capability of regulating both the voltages and frequencies. They are realized with different topologies for various applications [29]- [32]. The rectification mode normally is realized with a diode converter to reduce the circuit cost and complexity.…”

Section: Introductionmentioning

confidence: 99%

A New Single-Phase AC Voltage Converter With Voltage Buck Characteristics for Grid Voltage Compensation

et al. 2020

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“…They do have the capacity to control voltages as well as frequencies. For a variety of applications, they are achieved with various topologies [15]- [17]. Save the cost and simplify the circuit, the rectification mode is usually implemented with a diode converter.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Single Phase AC-AC Voltage Converter for Compensation of Voltage Issues in Power Distribution System

Saxena¹,

Sharma²

2022

IJSREM

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The power quality of the power distribution system is highly concerned with the use of renewable sources, solid-state electronic devices, and power electronic processors. This results in voltage fluctuations, voltage sag, and swell issues. The voltage source converter (dc-to-ac) can resolve these issues but there is a problem with high rating storage devices. The Dual converter (ac- to-dc) will be useful for energy-storing devices but due to complex circuit arrangement and high conversion losses, this converter is not favorable. The direct AC-AC voltage converter is a matter of research due to simple conversion. This paper presents the performance analysis of a single-phase ac-to-ac voltage converter operating in inverting and non-inverting modes with no current commutation problems. The performance analysis of the proposed converter is been done in MATLAB/Simulink 2019b. Keywords-Voltage sag and swell, voltage control, inverting mode, non-inverting mode, power distribution system

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“…Os conversores fonte de tensão (VSCs -Voltage Source Converters) têm sido amplamente empregados na conexão das fontes sustentáveis, como solar e eólicas, no sistema de distribuição quatro fios Fu et al (2019). Os VSCs quatro fios, conforme apresentado na Figura 1, têm sido preferido por possuírem vantagens como, menor número de chaves semicondutoras Maia et al (2018).…”

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Análise de SRF-PLL e DSOGI-PLL Aplicados em um VSC Quatro Fios Conectado à Rede Elétrica com Desequilíbrio de Tensão

Silva

Nascimento

Filho

et al. 2022

Proceedings IX Simpósio Brasileiro De Sistemas Elétricos

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The three-phase four-wire VSCs voltage source converters are used to connect sustainable sources to the distribution system where the loads are predominantly single-phase. The three-phase distribution system with unbalanced neutral has unwanted negative and zero sequence components. In this condition the synchronism between the VSC and the electrical grid that is done using the PLL (Phase Locked Loop) is affected. SRF-PLL (Synchronous Reference Frame-PLL) is popularly used, however it does not perform well in unbalanced systems. DSOGI-PLL (Dual Second Order Generalized Integrator-PLL) ensures synchronism between the VSC and the unbalanced power grid. Thus, the purpose of this article is to evaluate the effect of imbalance in ac currents of the VSC using the SRF-PLL and DSOGI-PLL Resumo: Os conversores fontes de tensão VSCs trifásicos a quatro fios são utilizados na conexão de fontes sustentáveis ao sistema de distribuição onde as cargas são predominantes monofásicas. O sistema de distribuição trifásico desequilibrado com neutro apresenta componentes indesejados de sequência negativa e zero. Nestas condições, o sincronismo entre o VSC e a rede elétrica que é feito utilizando o PLL (Phase Locked Loop) é afetado. O SRF-PLL (Synchronous Reference Frame-PLL) é popularmente utilizado, entretanto não garante o sincronismo entre o VSC e a rede elétrica desequilibrada. O DSOGI-PLL (Dual Second Order Generalized Integrator-PLL) garante o sincronismo entre o VSC e a rede elétrica desequilibrada. Assim, objetivo deste artigo é avaliar o efeito do desequilíbrio de tensão nas correntes ca do VSC utilizado o SRF-PLL e DSOGI-PLL.

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Three-Phase Four-Wire AC–DC–AC Multilevel Topologies Obtained From an Interconnection of Three-Leg Converters

Cited by 21 publications

References 18 publications

A New Single-Phase AC Voltage Converter With Voltage Buck Characteristics for Grid Voltage Compensation

A New Single-Phase AC Voltage Converter With Voltage Buck Characteristics for Grid Voltage Compensation

Performance Analysis of Single Phase AC-AC Voltage Converter for Compensation of Voltage Issues in Power Distribution System

Análise de SRF-PLL e DSOGI-PLL Aplicados em um VSC Quatro Fios Conectado à Rede Elétrica com Desequilíbrio de Tensão

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