Four-wire current-regulated PWM voltage converter

Verdelho, P.; Marques, G.D.

doi:10.1109/41.720333

Cited by 126 publications

(47 citation statements)

References 7 publications

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“…Among different topologies of four-wire systems, the three-leg inverter with split dc-link capacitors is the popular one where the midpoint of the dc-link is connected to a neutral point (see Fig. 1) [13]. Compared to three-phase four-leg topology, it has lower power switch and control complexity [14].…”

Section: A Three-phase Four-wire Control Systemmentioning

confidence: 99%

A secondary-control based fault current limiter for four-wire three phase inverter-interfaced DGs

Beheshtaein

Savaghebi

Guerrero

et al. 2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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Abstract-Fault current limiters (FCLs) are one class of solutions to cope with the upcoming challenges in microgrid protection. Considering high penetration of distributed generations (DGs) in microgrids, the necessity of designing cheap and effective FCL is getting higher. This paper attempts to fill this gap by proposing an embedded FCL operating based on modifying the secondary control of DGs. As this method is designed for fourwire system, besides cost-effectiveness, it has independency and flexibility to only limit the fault current of DG. In order to validate the proposed method, different types of faults are examined through an extensive simulation study.

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Section: A Three-phase Four-wire Control Systemmentioning

confidence: 99%

A secondary-control based fault current limiter for four-wire three phase inverter-interfaced DGs

Beheshtaein

Savaghebi

Guerrero

et al. 2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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“…Hysteresis control is considered as a nonlinear method [86][87][88][89][90][91][92][93]. The hysteresis controllers are used to track the error between the referred and measured currents.…”

Section: Hysteresis Control Techniquementioning

confidence: 99%

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

et al. 2018

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Abstract:In the modern era, distributed generation is considered as an alternative source for power generation. Especially, need of the time is to provide the three-phase loads with smooth sinusoidal voltages having fixed frequency and amplitude. A common solution is the integration of power electronics converters in the systems for connecting distributed generation systems to the stand-alone loads. Thus, the presence of suitable control techniques, in the power electronic converters, for robust stability, abrupt response, optimal tracking ability and error eradication are inevitable. A comprehensive review based on design, analysis, validation of the most suitable digital control techniques and the options available for the researchers for improving the power quality is presented in this paper with their pros and cons. Comparisons based on the cost, schemes, performance, modulation techniques and coordinates system are also presented. Finally, the paper describes the performance evaluation of the control schemes on a voltage source inverter (VSI) and proposes the different aspects to be considered for selecting a power electronics inverter topology, reference frames, filters, as well as control strategy.

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“…It is considered that this topology is not suitable for dc-ac converters which supply power to a network containing single-phase loads. A split dc-link of this form is used in four-wire active power filters, where rebalancing of the imbalance is not attempted and the system is free of dc components [11]- [12]. Some special pulsewidth modulation (PWM) schemes have been developed for three-level converters to balance the charging of the split link capacitors [3]- [14], but these apply to multilevel converters which do not make external connection to the neutral point (i.e., three-wire systems).…”

mentioning

confidence: 99%

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

Zhong

Liang

Feng

et al. 2006

IEEE Trans. Ind. Electron.

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Abstract-Inverters used as the interface for a distributed generator in a three-phase four-wire system sometimes operate with a large neutral current because of unbalanced loads and singlephase (possibly nonlinear) loads. Voltage balance within the dc-link of the inverter is important for proper operation of the inverter, and the neutral current is a significant disturbance to this. It is preferable to use fast acting control rather than dissipative balancing or large-valued capacitors. This paper develops a linear model of an actively balanced split dc-link and applies H ∞ control design to provide high-bandwidth robust control. The approach is developed for a conventional two-level inverter, but it remains valid (without change) for a three-level neutral-point clamped inverter. The controller achieves very small deviations of the neutral point (better than 0.5 in 800 V) from the midpoint of the dc source despite the large neutral current (32 A RMS ). The controller design is described and verified first in a PSCAD simulation and second in experimental testing of a 30-kW 415-V (line) inverter.Index Terms-DC-AC power converter, dc-link balancing, fourwire three-phase power system, H ∞ control, multilevel inverter, neutral line.

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Four-wire current-regulated PWM voltage converter

Cited by 126 publications

References 7 publications

A secondary-control based fault current limiter for four-wire three phase inverter-interfaced DGs

A secondary-control based fault current limiter for four-wire three phase inverter-interfaced DGs

Digital Control Techniques Based on Voltage Source Inverters in Renewable Energy Applications: A Review

$H^infty$Control of the Neutral Point in Four-Wire Three-Phase DC–AC Converters

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