Comparison among Two-Phase Three-Wire AC Off-Grid Power Systems

Menezes-Silva, Rafael; Brandão, Danilo I.; Fogli, Gabriel A.; Mendes, Victor F.; Sousa, Clodualdo Venício de

doi:10.1109/cobep/spec44138.2019.9065785

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Moreover, such existing application requires additional specific understanding of such symmetrical components when harmonic analysis need to be performed [17] under balance and unbalance conditions. In [18], it has also been reassured that off-grid power systems based on 2Φ3w topology (i.e., such as the above-mentioned particular case of microgrids) require particular interpretation and control approaches, as well as that instantaneous power oscillations and magnitude of neutral current are inversely related.…”

Section: A Comprehensive Literature Reviewmentioning

confidence: 99%

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Alonso¹,

Oliveira²,

Brandão³

et al. 2022

Eletrônica de Potência

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Multifunctional inverters play an important role in electrical grids due to their capability to provide active power conversion from photovoltaic (PV) systems, as well as by concomitantly offering ancillary services that provide grid support and power quality improvement. Although control strategies for such inverters have been extensively explored for applications in single-and threephase grids, their consideration for the two-phase threewire topology has been superficially discussed in literature. Thus, first, this paper contributes to the literature by presenting a comprehensive review about the control of power electronic inverters in two-phase threewire grids. As second contribution, this paper proposed a flexible control strategy based on the Conservative Power Theory capable of adequately synthesizing control references for a PV-based multifunctional inverter operating in a two-phase three-wire grid. Additionally, power quality services can be selectively offered by the inverter to achieve compensation of reactive, harmonic and unbalance current terms, as well as providing reduction in neutral currents. Hardware-in-the-loop experimental results comprising a multifunctional PV inverter under several scenarios of operation are shown to demonstrate and validate the flexibility of the method.

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Section: A Comprehensive Literature Reviewmentioning

confidence: 99%

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Alonso¹,

Oliveira²,

Brandão³

et al. 2022

Eletrônica de Potência

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“…Since thermal loading directly affects the lifetime of power converters, phase angle displacement plays an important role. The authors in [4] have compared the abn, αβn and xyn systems for active power oscillation and the magnitude of the neutral current.…”

Section: Introductionmentioning

confidence: 99%

Wear-Out Analysis of a Grid-Forming Two-Phase Three-Wire Converter Under Unbalanced Load

de Oliveira,

Cupertino,

Brito

et al. 2024

IEEE Open J. Power Electron.

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The grid-forming converter that supplies voltage magnitude and frequency is a key element for isolated remote communities, and then wear-out analysis is an essential figure of merit. Therefore, this paper proposes the two-phase three-wire (2Φ3W) grid forming converter applied in a case study of isolated riverside communities in the Brazilian Amazon region. The proposed xyn-converter displaces the voltage line angle in 180 • , differing from αβn-converter and abn-converter that displace voltage line angle in 90 • and 120 • respectively. First, the authors have also proposed a semiconductor current stress evaluation for 2Φ3W converters comparing the RMS current. Then, the lifetime evaluation of the three evaluated grid-forming converters is conducted. The results show that the converter operating in the xynconverter presents the highest reliability among the three converters. Finally, the thermal stress analysis is validated by means of a 2Φ3W converter prototype with an open semiconductor module. For the evaluated converters, the xyn-converter has the least thermal stress for balanced and unbalanced load conditions and therefore the longest lifespan. The experimental validation shows that the average temperature of the xynconverter is 19.4% and 23.3% lower than both the abn-converter and the αβn-converter under balanced load conditions.INDEX TERMS Grid-forming converter, isolated ac power grids, lifetime consumption, wear-out.

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Analysis of component current stresses of grid-forming converters for two-phase three-wire isolated AC power grids

de Oliveira,

de Barros,

Cupertino

et al. 2023

Microelectronics Reliability

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Comparison among Two-Phase Three-Wire AC Off-Grid Power Systems

Cited by 4 publications

References 17 publications

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

CPT-Based Control Strategy for a Two-Phase Three-Wire Pv Inverter: a Multifunctional Perspective and a Comprehensive Review

Wear-Out Analysis of a Grid-Forming Two-Phase Three-Wire Converter Under Unbalanced Load

Analysis of component current stresses of grid-forming converters for two-phase three-wire isolated AC power grids

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