Feasibility of Electronic Tap-Changing Stabilizers for Medium Voltage Lines&amp;#x2014;Precedents and New Configurations

García, Salvador Martínez; Rodríguez, Juan; Jardini, J.A.; Vaquero, Joaquín; Segura, A.I.; Cid, P. Martinez

doi:10.1109/tpwrd.2009.2021032

Cited by 22 publications

(9 citation statements)

References 24 publications

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“…A utilização de comutadores de taps foi inicialmente encorajada pela generalização da tensão alternada nos sistemas de potência [3]. Estes dispositivos permitem a regulação da tensão através da mudança da relação de transformação dos transformadores.…”

Section: Comutador Eletrônico De Tapsunclassified

“…Os comutadores de tap sob carga (OLTC -On-Load Tap Changer) são os dispositivos de regulação de tensão mais populares, sendo empregados em transformadores de média e elevada potências. A comutação dos taps em OLTCs é realizada através de chaves eletromecânicas, resultando em arco-elétrico e consequente carbonização dos contatos, além da degradação do óleo utilizado na isolação e arrefecimento do transformador [3]. O alto custo destes dispositivos impede que os mesmos sejam usados em sistemas de distribuição.…”

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Transformador de Distribuição Inteligente

Quevedo¹,

Giacomini²,

Beltrame³

et al. 2014

Eletrônica de Potência

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Resumo-A crescente demanda por eletricidade, os requisitos de melhoria da qualidade de energia por parte dos agentes reguladores e a inclusão da geração distribuída estão aumentando a complexidade dos sistemas de distribuição. Neste cenário, a regulação da tensão torna-se mais complexa, especialmente em longas linhas de distribuição. Neste trabalho, um transformador de distribuição inteligente é proposto, o qual emprega um comutador eletrônico de taps sob carga, associado a um sistema de comunicação bidirecional. Este conjunto permite a regulação automática da tensão, telemetria e o controle remoto pela companhia concessionária, possibilitando sua aplicação nas redes de distribuição atuais e nas redes inteligentes, sendo caracterizado por sua fácil expansão.

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Section: Comutador Eletrônico De Tapsunclassified

unclassified

Transformador de Distribuição Inteligente

Quevedo¹,

Giacomini²,

Beltrame³

et al. 2014

Eletrônica de Potência

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“…The use of tap changers was initially encouraged by the generalization of ac voltage in the power systems [3]. These devices enable the voltage regulation through the changing of the turn ratio of the transformers.…”

Section: Electronic On Load Tap Changermentioning

confidence: 99%

“…The commutation of taps in OLTCs is done by electromechanical switches, resulting in arcing in contacts, and consequently, their carbonization of the contacts and degradation of the insulation oil [3]. The high cost of these devices prevents them from being used in distribution systems.…”

Section: Introductionmentioning

confidence: 99%

Smart distribution transformer applied to Smart Grids

Quevedo

Giacomini

Beltrame

et al. 2013

2013 Brazilian Power Electronics Conference

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Growing demand, requirements for power quality enhancement and distribution generation are increasing the complexity of distribution systems. In this scenario, voltage regulation of distribution networks also becomes more complex, especially in long distribution lines. In this paper, a smart distribution transformer is proposed, which employs an electronic on load tap changer with a bidirectional communication system. This system enables automatic voltage regulation, telemetry and remote control for power utilities, allowing its application in Smart Grids. Keywords -Electronic on load tap changer (OLTC), smart grids (SG), smart transformer (ST).

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“…Both of the means should be developed simultaneously and independently. For the latter, the ac voltage stabilizers based on mechanical or solid-state onload tap-changers (OLTC) is of such kind of equipment [12][13]. The OLTC realizes the voltage regulation of the power grid through mechanical or solid-state tap in static conditions.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase Flexible Transformer Based on Bipolar Direct AC/AC Chopper and its Control Strategy

et al. 2020

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Dynamic states (e.g., voltage sags and swells) in the power grid can cause faults and defects in sensitive loads and in consequence financial losses. This paper deals with a flexible transformer based on bipolar direct AC/AC chopper (BD-AC). It is a combination of BD-AC and traditional power frequency transformer, and it can realize the flexible regulation of voltage amplitude and phase angle respectively according to voltage requirements. Firstly, the topology and modulation strategy of the selected BD-AC are analyzed. On this basis, the flexible transformer system topology based on BD-AC and transformer is proposed. Then, based on the structure of flexible transformer system, its working principle is analyzed in detail, and the regulation range of voltage amplitude and phase angle are quantitatively studied. Furthermore, considering the principle of voltage regulation, a triangle angle theory based control strategy is proposed. Finally, the correctness and effectiveness of the theoretical analysis of the proposed flexible transformer system are carried out by detailed computer simulation.

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Feasibility of Electronic Tap-Changing Stabilizers for Medium Voltage Lines—Precedents and New Configurations

Cited by 22 publications

References 24 publications

Transformador de Distribuição Inteligente

Transformador de Distribuição Inteligente

Smart distribution transformer applied to Smart Grids

Three-Phase Flexible Transformer Based on Bipolar Direct AC/AC Chopper and its Control Strategy

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