Effect of geomagnetically induced current on the loss of transformer tank

Zhang, Bao; Liu, L.; Liu, Y.; McVey, Mark; Gardner, R. Matthew

doi:10.1049/iet-epa.2009.0192

Cited by 20 publications

(15 citation statements)

References 9 publications

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“…In this paper, the core type transformer reference to [12][13], and with similar capacity the singlephase shell type transformer is introduced.…”

Section: Parameters and Modelling Transformer Parametersmentioning

confidence: 99%

“…The relevant data of two transformers are given in table 1, and figure 1 shows the B-H curves of the materials of the core and tank [12]. As for materials, the core uses M095-27S silicon steel, and the tank material is A3 steel, the winding wire uses copper, and the material for magnetic shunt is the same as the core.…”

Section: Parameters and Modelling Transformer Parametersmentioning

confidence: 99%

“…There are two types of different iron cores: the core type and the shell type. In references [12] and [13], the leakage flux distribution of the 500kV single-phase transformer with core type has been studied, however it was studied with a 2D model. The main transformers widely used are singlephase shell type transformers, typically in both China's EHV power grid (750kV power grid constructed from 2005) and the UHV power grid (1000kV constructed from 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the different core structures between the shell type and the core type transformers, the leakage flux distribution and the temperature rise effect of the two type transformers are different, which lead to difference in the distribution of temperature rise. Based on the work in [12,13], this paper makes further study on the GIC effect, employing the core type transformer with similar capacity as in [12,13], but targeting at the single-phase shell type transformer, to determine the temperature rise position in the supporting members and the corresponding GIC threshold values which can provide references both for the designing of the Chinese EHV and UHV transformers and mitigation the temperature rise due to the DC bias.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Single-phase Shell & Core Type Transformers in GIC Temperature Rise Effect

Zhai¹,

Zhu²,

Gu³

et al. 2018

dteees

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Abstract. Geomagnetically induced currents (GICs) flowing through transformers may cause temperature rise which could result in permanent damage. As the single-phase-set transformers are widely used in the bulk power transmission, this paper investigates the temperature rise effect both in shell type transformers and core type transformers. Based on the designing parameters of the 500kV single-phase shell type and core type transformer, a 3D finite element model including the transformer iron core, tank and supporting parts has been established, so that the temperature rises in the iron cores and supporting parts are all taken into account. Through calculation with different values of GIC excitations, the different temperature rise characteristics between shell transformer and core transformer are investigated. The simulation results of the temperature rise at different positions in the supporting parts can provide references for the designing of Chinese UHV (ultrahigh voltage) transformers to mitigate the temperature rise due to DC bias.

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“…In this paper, the core type transformer reference to [12][13], and with similar capacity the singlephase shell type transformer is introduced.…”

Section: Parameters and Modelling Transformer Parametersmentioning

confidence: 99%

Section: Parameters and Modelling Transformer Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative Study of Single-phase Shell & Core Type Transformers in GIC Temperature Rise Effect

Zhai¹,

Zhu²,

Gu³

et al. 2018

dteees

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“…This kind of transformer is called an asymmetric transformer due to the difference in the length of the centre limb that is shorter than those of the two side limbs. Representation of the hysteresis loop is very important in view of the distribution of the magnetic flux density [16][17][18][19][20][21]. The paper [22] describes simulation model of a single-phase two winding transformer in an electromagnetic transient programme-type programme for GIC studies with hysteresis model based on the Jiles-Atherton (J-A) theory.…”

Section: Introductionmentioning

confidence: 99%

Effect of the GICs on magnetic saturation of asymmetric three‐phase transformer

Aboura

Touhami

2017

IET Electric Power Applications

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The most commonly used models in geomagnetic-induced currents (GICs) studies neglect the hysteresis phenomenon. In relation to this, the authors present an approach to integrate the hysteresis phenomenon to the finiteelement model (2D-FEM) for the effects of the GIC which considers the current, as an input quantity. These currents are obtained by a dynamic electromagnetic model that the authors developed, and are compared with the results obtained by experimentation. This is the first time that this phenomenon has been shown in three-phase transformers with load. They also provide other practical responses in relation to other papers in which their studies concern the imbalance GIC bias on the asymmetric three-phase transformers with no-load while the majority of the transformers operate on load.

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