A Minimally Switched Control Algorithm forThree-Phase Four-Leg VSI Topology toCompensate Unbalanced and Nonlinear Load

Lohia, P.; Mishra, Mahesh K.; Karthikeyan, K.; Vasudevan, Krishna

doi:10.1109/tpel.2008.925414

Cited by 76 publications

(47 citation statements)

References 25 publications

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“…Nowadays, a growing interest in using the three-phase four-leg inverters is observed from the researchers' due to their ability to handle the unbalanced loads efficaciously in four-wire systems [45,46]. In this topology, the neutral point is proposed by connecting the neutral path to the mid-point of the additional fourth leg, as shown in Figure 8.…”

Section: Three Phase Four-leg Vsi With An Output Filtermentioning

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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Section: Three Phase Four-leg Vsi With An Output Filtermentioning

confidence: 99%

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

et al. 2018

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“…In principle, the decentralized voltage compensation scheme can be realized by modifying the sequence virtual impedances in (12), where RVf k is the fixed resistance for achieving common load current sharing, and RV k is the adjustable resistance for restoring voltage quality (k = − or 0).…”

Section: Selective Bus Voltage Enhancementmentioning

confidence: 99%

“…Typically, the unbalanced load currents flow through the line and converter impedances, giving rise to unbalanced terminal voltages which can trip off sensitive loads. This problem is solved by employing active power filters (APFs) [12]- [14], static synchronous compensators (STATCOMs), dynamic voltage restorers (DVRs) [15], [16] or the unified power quality conditioners (UPQCs) [17]. However, these additions are costly.…”

mentioning

confidence: 99%

Four-Leg Converters With Improved Common Current Sharing and Selective Voltage-Quality Enhancement for Islanded Microgrids

Zhang

Tang

Loh

et al. 2016

IEEE Trans. Power Delivery

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Abstract-Four-leg DC-AC power converters are widely used for the power grids to manage grid voltage unbalance caused by the interconnection of single-phase or three-phase unbalanced loads. These converters can further be connected in parallel to increase the overall power rating. The control of these converters poses a particular challenge if they are placed far apart with no links between them (e.g. in islanded microgrids). This challenge is studied in this paper with each four-leg converter designed to have improved common current sharing and selective voltage quality enhancement. The common current sharing, including zero sequence component, is necessary since loads are spread over the microgrid and they are hence the common responsibility of all converters. The voltage quality enhancement consideration should however be more selective since different loads have different sensitivity levels towards voltage disturbances. Converters connected to the more sensitive load buses should therefore be selectively triggered for compensation when voltage unbalances at their protected buses exceed the predefined thresholds. The proposed scheme is therefore different from conventional centralized schemes protecting only a common bus. Simulation and experimental results obtained have verified the effectiveness of the proposed scheme when applied to a four-wire islanded microgrid.

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“…Such as power generation, distributed energy systems [1][2][3][4], active power filtering [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], uninterruptible power supplies, special control motors configurations [21][22][23][24][25], military utilities, medical equipment [26][27] and rural electrification based on renewable energy sources [28][29][30][31][32]. This kind of inverter has a special topology because of the existence of the fourth leg; therefore it needs special control algorithm to fulfil the subject of the neutral current circulation which was designed for.…”

Section: Introductionmentioning

confidence: 99%

The Space Vector Modulation PWM Control Methods Applied on Four Leg Inverters

Kouzou¹,

M.O²,

M.S³

2011

Electric Machines and Drives

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A Minimally Switched Control Algorithm forThree-Phase Four-Leg VSI Topology toCompensate Unbalanced and Nonlinear Load

Cited by 76 publications

References 25 publications

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

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

Four-Leg Converters With Improved Common Current Sharing and Selective Voltage-Quality Enhancement for Islanded Microgrids

The Space Vector Modulation PWM Control Methods Applied on Four Leg Inverters

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