Physical simulation of heat exchange between 6(10) kV voltage instrument transformer and its environment with natural convection and insolation

Litvinov, Sergey; Lebedev, Vladimir; Smirnov, Nikolay; Tyutikov, V. V.; Makhsumov, Ilkhom B.

doi:10.1051/matecconf/201819401035

Cited by 10 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, low levels of power quality (PQ), temperature, and electric fields are among the most common causes of IT malfunctioning and accuracy degradation. The effects of such influencing factors are studied in [ 17 , 18 , 19 , 20 ], [ 21 , 22 , 23 ], and [ 24 , 25 , 26 ], respectively.…”

Section: Introductionmentioning

confidence: 99%

Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Mingotti

Costa

Pasini

et al. 2021

Sensors

View full text Add to dashboard Cite

The use of capacitive dividers (CDs) in medium-voltage (MV) networks started as simple voltage detectors and as rough voltage measurement instruments for protective purposes. Now, with the spread of intelligent electronic devices and renewable energy sources at the distribution level, capacitive dividers are designed and installed to perform accurate voltage measurements. Such a requirement is mandatory when the power quality has to be assessed. Therefore, CDs are currently being used either for power frequency or for high-frequency (supraharmonic- or partial-discharge-level) measurements. In this paper, typical off-the-shelf CDs are studied and modeled to understand how they behave in a wide range of frequencies and when the temperature varies. To this purpose, specific setups and tests have been developed and performed. From the results, it is clear that with proper modeling of CDs, it is possible to exploit them for measuring phenomena in a wide range of frequencies, including the effects due to temperature variations and self-resonances.

show abstract

Section: Introductionmentioning

confidence: 99%

Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Mingotti

Costa

Pasini

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…In addition to the standards for ITs, there is also extensive related literature with available documents that try to address most of the issues that may affect their correct operation. For example, in [9][10][11][12][13], the effects of temperature on ITs are described; in [14][15][16][17][18][19][20], several modeling methods and procedures are presented, for both CTs and VTs (in both time and frequency domain); finally, [21][22][23][24][25][26] discuss specifically the ITs uncertainty under rated or off-nominal conditions of the grid.…”

Section: Introductionmentioning

confidence: 99%

Modeling Stray Capacitances of High-Voltage Capacitive Dividers for Conventional Measurement Setups

et al. 2021

View full text Add to dashboard Cite

Stray capacitances (SCs) are a serious issue in high-voltage (HV) applications. Their presence can alter the circuit or the operation of a device, resulting in wrong or even disastrous consequences. To this purpose, in this work, we describe the modeling of SCs in HV capacitive dividers. Such modeling does not rely on finite element analysis or complicated geometries; instead, it starts from an equivalent circuit of a conventional measurement setup described by the standard IEC 61869-11. Once the equivalent model including the SCs is found, closed expressions of the SCs are derived starting from the ratio error definition. Afterwards, they are validated in a simulation environment by implementing various circuit configurations. The results demonstrate the expressions applicability and effectiveness; hence, thanks to their simplicity, they can be implemented by system operators, researchers, and manufacturers avoiding the use of complicated methods and technologies.

show abstract

Studying the Impact of Weather Conditions and Operating Modes on the Thermal State of the Primary Voltage Converter of a 110 kV Digital Transformer

Yablokov

Gotovkina

Smirnov

et al. 2019

Proceedings of 14th International Conference on Electromechanics and Robotics “Zavalishin's Readings”

View full text Add to dashboard Cite

Physical simulation of heat exchange between 6(10) kV voltage instrument transformer and its environment with natural convection and insolation

Cited by 10 publications

References 3 publications

Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Modeling Capacitive Low-Power Voltage Transformer Behavior over Temperature and Frequency

Modeling Stray Capacitances of High-Voltage Capacitive Dividers for Conventional Measurement Setups

Studying the Impact of Weather Conditions and Operating Modes on the Thermal State of the Primary Voltage Converter of a 110 kV Digital Transformer

Contact Info

Product

Resources

About