Transformer Design Principles

Vecchio, Robert M. Del; Poulin, Bertrand; Feghali, Pierre T.; Shah, Dilipkumar M.; Ahuja, Rajendra

doi:10.1201/ebk1439805824

Cited by 84 publications

(43 citation statements)

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“…The transformer winding capacitance may have an effect on changes in voltage phase angle and may also contribute to surge phenomena during system switching [3].…”

Section: Transformer Winding Capacitancementioning

confidence: 99%

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Optimization of Power Transformer Design: Losses, Voltage Regulation and Tests

Mgunda¹

2017

JPEE

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This paper presents the design approach used in designing transformers mostly used in power supplies and power systems. The paper will cover theoretical principles applied in analyzing magnetic circuits to better understand the operation of the transformer. Since well-designed transformer is supposed to meet the specifications of the environment that it is going to be used, there is a need to confirm after the transformer is built to make sure that it is going to operate efficiently and without a failure. Therefore, this paper will also present the traditional methods used to test transformers in the industries to make sure that it will operate within the prescribed loading limits and voltages. This paper will cover the transformer losses in detail including the test methods used to calculate nameplate parameters for power transformers used in power systems.

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“…The transformer winding capacitance may have an effect on changes in voltage phase angle and may also contribute to surge phenomena during system switching [3].…”

Section: Transformer Winding Capacitancementioning

confidence: 99%

“…The out-of-phase component of voltage drop across these series elements is usually caused by in-phase load current flowing through the leakage inductance or out-of-phase load current flowing through the winding resistance or a combination [3] ( )…”

Section: Phase Shiftmentioning

confidence: 99%

Optimization of Power Transformer Design: Losses, Voltage Regulation and Tests

Mgunda¹

2017

JPEE

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“…Seu estudo foi complementando por Rogoswki em 1909 [8], quem introduziu um fator de correção para levar em consideração o efeito da componente radial do fluxo magnético de dispersão. Este enfoque, conhecido como a fórmula de Kapp,é utilizado com razoável nível de precisão no cálculo de reatâncias de curto-circuito em transformadores, sempre que a geometria das bobinas seja tal que não surjam componentes radias importantes de campos de dispersão [9], [10], [11].…”

Section: Métodos Analíticos Vs Métodos Numéricosunclassified

“…As regiões indicadas com os retângulos vermelhos representam a seção transversal do enrolamento. Para transformadores, a temperatura de hot spot (Θ hs ) depende da temperatura do ambiente (Θ amb ), da temperatura do topo doóleo (Θ to ), do gradiente de temperatura entre enrolamento eóleo médio (∆Θ em−om ) e do fator de hot spot H s [2], Θ hs = θ amb + Θ to + H s ∆Θ em−om (11) No entanto, esta equação considera que o fator de hot spot se encontra na região superior do enrolamento. Porém, percebese através das Figuras 3 e 5 que o fator de hot spot pode não estar localizado na parte superior, demonstrando a necessidade da análise da localização do maior fator, cuja temperatura deve ser avaliada através de uma equação na forma de: (12) e que considere a real posição do hot spot.…”

Section: Modelagem Através Do Mefunclassified

Modelagem eletromagnética e cálculo do hot-spot em reatores do tipo shunt através do Método de Elementos Finitos em 2-D

Nunes

Portillo²,

Portillo³

2018

2018 IEEE 9th Power, Instrumentation and Measurement Meeting (EPIM)

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“…However, as transformer structures of today are getting more and more complex, a need has arisen to come up with a more systematic treatment of coupled inductors so that their dynamics could be modeled effectively in situations, which are considered to be challenging. The methodologies presented in transformer literature [4] [5] are for power transformer analysis under symmetrical core. For asymmetric three-phase magnetic cores, the reluctances of individual limbs vary.…”

Section: Introductionmentioning

confidence: 99%

Reluctance Network Analysis for Complex Coupled Inductors

Penttonen¹,

Shafiq²,

Lehtonen³

2017

JPEE

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The use of reluctance networks has been a conventional practice to analyze transformer structures. Basic transformer structures can be well analyzed by using the magnetic-electric analogues discovered by Heaviside in the 19 th century. However, as power transformer structures are getting more complex today, it has been recognized that changing transformer structures cannot be accurately analyzed using the current reluctance network methods. This paper presents a novel method in which the magnetic reluctance network or arbitrary complexity and the surrounding electrical networks can be analyzed as a single network. The method presented provides a straightforward mapping table for systematically linking the electric lumped elements to magnetic circuit elements. The methodology is validated by analyzing several practical transformer structures. The proposed method allows the analysis of coupled inductor of any complexity, linear or non-linear.

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Transformer Design Principles

Cited by 84 publications

References 0 publications

Optimization of Power Transformer Design: Losses, Voltage Regulation and Tests

Optimization of Power Transformer Design: Losses, Voltage Regulation and Tests

Modelagem eletromagnética e cálculo do hot-spot em reatores do tipo shunt através do Método de Elementos Finitos em 2-D

Reluctance Network Analysis for Complex Coupled Inductors

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