A Performance Comparison of Stationary Frame Control of Three-Leg and Four-Leg Voltage Source Inverters in Power System Applications

Frutos, Paul; Christopher, Edward; Sánchez, Antonio F. Rial; Aguirre, Omar

doi:10.1109/iecon.2018.8591698

Cited by 4 publications

(4 citation statements)

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“…The control over zero-sequence currents in four-leg PV VSIs is discussed in [201], while a VU mitigation technique using three-phase damping control is suggested in [202]. A hierarchical control strategy proposed in [203], a combination of three-and four-leg VSIs in [204], switching of single-phase inverters between the three phases with the lowest phase voltage [205], and model adaptive reference control for an adaptive PI derivative controller [206] are some of the other approaches that have been proposed for VU mitigation in the network. Zhu et al [207] proposed a coordination control strategy for a hybrid energy storage system consisting of a battery and ultra-capacitor, for good performance under unbalanced and non-linear load conditions in which the battery provides the fundamental powers, while the ultra-capacitor provides the compensating power.…”

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

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Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…In this study, the QAB converter is always transferring an equal amount of power through the two ports connected to the MMC cells while the others ports are free for power transfer whilst maintaining the power constraint equations ( 6) and (7). So, the voltage phase-shift angles from port 1 and port 2 must be the same and they are set to zero for reference (e.g.…”

Section: B Quad Active Bridge -Mmc Based Sst: Power Transfer Analysismentioning

confidence: 99%

“…The maximum power that these ports handle is 1 [p.u], that is the case when D 3 = D 4 = ±0.5. On the other hand, port 3 and port 4 can inject or drain a maximum power of 1.5 [p.u], again, all the cases are under the energy balance constraint given by equations ( 6) and (7). Fig.…”

Section: B Quad Active Bridge -Mmc Based Sst: Power Transfer Analysismentioning

confidence: 99%

“…1, where each QAB converters is connected to two MMC cells while the third port of each QAB could be used to connect either a DER or DESS, the fourth port of each DC/DC converter must be connected to the LVDC bus that could interacts with a low voltage AC (LVAC) grid by means of a power inverter (e.g. four-leg voltage source converter [7]). This figure exemplifies a SST with four MMC cells per leg (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Quad-Active-Bridge as the basic cell of a MMC Based SST for DER and DESS Integration

Frutos

Briz

Sánchez

et al. 2019

2019 IEEE 28th International Symposium on Industrial Electronics (ISIE)

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In a solid state transformer (SST), one of the most important roles is played by the dc-dc converter interfacing the high voltage port and the low voltage port while providing galvanic isolation. This paper proposes a quad-active-bridge (QAB) converter as the basic cell of a Modular Multilevel Converter (MMC) based solid state transformer for the integration of distributed energy resources (DER) and distributed energy storage systems (DESS) into the grid. This study comprises power transfer analysis, modeling and control of the QAB for this application. Furthermore, this paper shows an alternative method based on the star-mesh transformation to built the multiwinding tranformer equivalent circuit, that relates any two ports of the multiple-active-bridge (MAB) converter through a link inductance, which allows to describe power flow. Results are obtained by simulations in PLECS.

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