ANALISE DA PERFORMANCE DE INVERSORES SOLARES SUBMETIDOS A SURTOS ELÉTRICOS DESCARGAS ATMOSFÉRICAS-ENG. DOUGLAS LARA(CLAMPER)-Workshop ILSD BRAZIL 2025 – Dia Internacional da Segurança Contra os Efeitos Nocivos das Descargas Atmosféricas

 

ANALISE DA PERFORMANCE DE INVERSORES SOLARES SUBMETIDOS A SURTOS ELÉTRICOS DESCARGAS ATMOSFÉRICAS-ENG. DOUGLAS LARA(CLAMPER)-Workshop ILSD BRAZIL 2025 

 IEE – Instituto de Energia e Ambiente é um Instituto Especializado da Universidade de São Paulo e tem suas atividades baseadas na pesquisa, ensino e extensão universitária nos âmbitos da Energia e Ciências Ambientais.

A Study on the Application of a 3-Phase 4-Wire Zig-Zag Filter in a 100kW Electric Vehicle Fast Charger 100kW급 전기자동차 급속충전장치에서 3상 4선식 지그재그 필터의 적용에 관한 연구 Jin-Yong Bae

 A Study on the Application of a 3-Phase 4-Wire Zig-Zag Filter in a 100kW Electric Vehicle Fast Charger 100kW급 전기자동차 급속충전장치에서 3상 4선식 지그재그 필터의 적용에 관한 연구 Jin-Yong Bae 

 Abstract This study proposes a 3-phase 4-wire zigzag filter that is applicable to a 100 kW electric vehicle (EV) fast charger. The 30 kW class four power converter linked in parallel results in a current imbalance at the input terminal, leading to a sharp, unbalanced current at the neutral point of a 100 kW high-capacity rapid charging apparatus. Moreover, owing to increased harmonic noise, decreased power factor, increased reactive power, decreased active power, decreased efficiency, and electromagnetic wave generation, the unbalanced current at the neutral point is a primary cause of EV charger failures. This study proposes an ideal 3-phase 4-wire zigzag filter for a 100 kW EV fast charger and experimentally verifies that it lowers the neutral point unbalanced current, eliminating harmonics and reaching a peak efficiency of 95.632%.

VIEW FULL PAPER: http://journal.auric.kr/AURIC_OPEN_temp/RDOC/kiee01/kieet_202506_012.pdf

Integration of SiC Devices and High-Frequency Transformer for High-Power Renewable Energy Applications

 Integration of SiC Devices and High-Frequency Transformer for High-Power Renewable Energy Applications Weichong Yao 1 , Junwei Lu 1,*, Foad Taghizadeh 2 , Feifei Bai 1 and Andrew Seagar 1 1 School of Engineering and Built Environment, Griffith University, Brisbane, QLD 4111, Australia 2 School of Engineering, Macquarie University, Sydney, NSW 2109, Australia * Correspondence: j.lu@griffith.edu.au 

 Abstract: This paper presents a novel structure of Integrated SiC MOSFETs with a high-frequency transformer (I-SiC-HFT) for various high-power isolated DC–DC converters. Several resonant converters are considered for integration in this paper, including the phase-shift full-bridge (PSFB) converter, inductor–inductor–capacitor (LLC) resonant converter, bidirectional PSFB converter, and capacitor–inductor–inductor–capacitor (CLLC) resonant converter. The applications of I-SiC-HFT are focused on V2G EV battery charging systems, energy storage in DC and AC microgrids, and renewable energy systems. SiC devices, including MOSFETs, Schottky diodes, and MOSFET modules, are used in this novel structure of I-SiC-HFT. The high-frequency magnetic structure uses distributed ferrite cores to form a large central space to accommodate SiC devices. The optimized architecture of I-SiC-HFT and heatsink structure is proposed for thermal management of SiC devices. To prove the concept, a small-scale 1.5 kW prototype I-SiC-HFT is used to demonstrate the basic structure and various performance indicators through the FEM based electromagnetic simulation and DC–DC converter experiments.

VIEW FULL PAPER: https://www.mdpi.com/1996-1073/16/3/1538

Grid-Forming Controller for Multi DC/AC Converter Topology Supplying 25 kVAC Single-Phase Railway Catenary From 3 kVDC-ROBERTO MARTÍN LÓPEZ 1, SERGIO DE LÓPEZ DIZ 1, ALESSANDRO FARO 2 (Member, IEEE), EMILIO JOSÉ BUENO PEÑA 1 (Member, IEEE), AND ALESSANDRO LIDOZZI

 ABSTRACT 

One of the primary challenges associated with single-phase AC railway electrification is the unbalance created within the three-phase supply grid. This problem does not arise in DC electrification systems. The aim of this article is to introduce a novel Grid-Forming control strategy, which applied to a power electronics based topology allows the generation of an AC catenary from the DC catenary. Focusing on the capabilities of the control algorithm, the system is presented as a fully scalable solution employing multiple grid-forming DC/AC converters. These converters use power control loops based on the Virtual Synchronous Machine concept, adapted to single-phase operation. A key advantage of this approach is that all converters within the system contribute to supporting both voltage and frequency stability. In addition, the implementation does not require a higher-level controller or communication system. Through an appropriate power control design, the power supplied by each converter, relative to the total load demand, can be determined.

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https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10914004

Regenerative energy management-reuse algorithm in UPS- supplied systems. Fatmir Basholli 1, and Bexhet Kamo-

 

Regenerative energy management-reuse algorithm in UPS- supplied systems. Fatmir Basholli 1, and Bexhet Kamo 

Abstract 

Loads/equipment especially in industrial applications and other different applications that use electric motors, draw current from the network while rotating, but in case of a sudden force (braking effect) they start to produce electricity themselves. This energy is sent back to the source they are fed and in such a case the regenerative energy should be managed. If this type of load is fed by a UPS (uninterruptible power supply), in the braking mode, the UPS applies the extra energy to its DC BUS through the reverse diodes of the output power transistors (IGBT), which causes the DC BUS voltage to rise. This extra energy, regenerative energy, may be used by other equipment in the network when is possible and if not (technically), to prevent the DC BUS rise, a resistor group driven/ controlled by the respective controller is placed on the DC BUS to “re-route” the energy usage and prevent the UPS damage. In this paper we provide an algorithm that may be used to control this process of using regenerative energy by network or by re-routing it in the group of resistors.

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 https://www.researchgate.net/publication/378300082_Regenerative_energy_management-reuse_algorithm_in_UPS-_supplied_systems