Determination of a capacitance model for inductive medium voltage transformers

Buchhagen, Christoph; Reese, C.; Hofmann, Lutz; Daumling, H.

doi:10.1109/tdc.2012.6281501

Cited by 6 publications

(9 citation statements)

References 2 publications

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“…There are several approaches to explain the altered frequency response. First, the front-part-and ground-capacitances [8] are modified because the relative permittivity of the surrounding material is different. Furthermore, the cast resin is a little bit pressed into the winding and therefore, it changes the layer capacitance.…”

Section: Design Parameters Of Voltage Transformersmentioning

confidence: 99%

Metrological determination of the frequency response of inductive voltage transformers up to 20 kHz

Buchhagen

Fischer

Hofmann

et al. 2013

2013 IEEE Power &Amp; Energy Society General Meeting

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The use of power electronics and other assets with a nonlinear impedance characteristic causes harmonics in the electrical grid which should be monitored to keep the power quality at a high level. System operators connect their secondary equipment mainly to inductive voltage transformers that may have resonances in the frequency range of interest. Therefore, the influence of a voltage transformer itself on the PQ measurement has to be assessed, especially since they have some advantages compared to other technologies. Thereby, it is important to be able to measure the frequency response with a low measurement error. As shown in this work, several external factors can influence the measurement results to a great extent. Therefore, it should be known which variables affect the frequency behavior. Several influences are analyzed in this work and their impact on the frequency response is displayed.

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Section: Design Parameters Of Voltage Transformersmentioning

confidence: 99%

Metrological determination of the frequency response of inductive voltage transformers up to 20 kHz

Buchhagen

Fischer

Hofmann

et al. 2013

2013 IEEE Power &Amp; Energy Society General Meeting

View full text Add to dashboard Cite

show abstract

“…Furthermore, the capacitances in Fig. 3 are described in detail in [6]. The layer capacitances, most importantly, can be calculated by using a modified equation for cylindrical capacitors:…”

Section: Equivalent Circuit Elementsmentioning

confidence: 99%

“…Factor is used to correct the calculation error caused by the pressure of the outside layers on the inner ones [4], [6]. Front part capacitances cannot be measured directly, being considerably smaller than the layer capacitances [6].…”

Section: Equivalent Circuit Elementsmentioning

confidence: 99%