Research output: Contribution to journal › Article › Scientific › peer-review

**Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers.** / Ghasemi, Sajjad ; Allahbakhshi, Mehdi ; Behdani, Behzad; Tajdinian, Mohsen ; Popov, Marjan.

Research output: Contribution to journal › Article › Scientific › peer-review

Ghasemi, S, Allahbakhshi, M, Behdani, B, Tajdinian, M & Popov, M 2020, 'Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers', *Electric Power Systems Research*, vol. 182, 106204, pp. 1-9. https://doi.org/10.1016/j.epsr.2020.106204

Ghasemi, S., Allahbakhshi, M., Behdani, B., Tajdinian, M., & Popov, M. (2020). Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers. *Electric Power Systems Research*, *182*, 1-9. [106204]. https://doi.org/10.1016/j.epsr.2020.106204

Ghasemi S, Allahbakhshi M, Behdani B, Tajdinian M, Popov M. Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers. Electric Power Systems Research. 2020;182:1-9. 106204. https://doi.org/10.1016/j.epsr.2020.106204

@article{89a1806741f64e8d868ac55989a2fa3d,

title = "Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers",

abstract = "Vacuum circuit breaker operation causes transient overvoltages that may lead to severe damages to transformer insulation. Since the parameters affecting these overvoltages have stochastic nature, a statistical analysis may provide detailed insight into the overvoltages from the point of view of insulation coordination applications. In this paper, a statistical analysis of the overvoltage variations of the step-up transformer during vacuum circuit breaker operation is conducted. Some variables, including switching angle, current chopping, high-frequency current quenching capability, and wind turbine power, are assumed as random variables. Besides, some indicators representing the switching overvoltage characteristics such as the amplitude, the number of restrikes, and the rate of rise are extracted. By performing a probabilistic analysis, the destructiveness due to switching overvoltages on typical transformer insulation can be investigated. The sensitivity of different surge protective devices and their effectivities are also analyzed and statistically evaluated. The applied methodology is very useful because of the stochastic nature of the switching overvoltages. In this work, the impact of protective equipment on each of the overvoltage indicators is analyzed. It is also found that considering only the amplitudes of transient overvoltages is not enough to draw conclusions about the safety of the transformer when exposed to frequent switching surges.",

keywords = "Switching transients, Vacuum circuit breaker, Statistical transient, Restrikes",

author = "Sajjad Ghasemi and Mehdi Allahbakhshi and Behzad Behdani and Mohsen Tajdinian and Marjan Popov",

year = "2020",

doi = "10.1016/j.epsr.2020.106204",

language = "English",

volume = "182",

pages = "1--9",

journal = "Electric Power Systems Research",

issn = "0378-7796",

publisher = "Elsevier",

}

TY - JOUR

T1 - Probabilistic analysis of switching transients due to vacuum circuit breaker operation on wind turbine step-up transformers

AU - Ghasemi, Sajjad

AU - Allahbakhshi, Mehdi

AU - Behdani, Behzad

AU - Tajdinian, Mohsen

AU - Popov, Marjan

PY - 2020

Y1 - 2020

N2 - Vacuum circuit breaker operation causes transient overvoltages that may lead to severe damages to transformer insulation. Since the parameters affecting these overvoltages have stochastic nature, a statistical analysis may provide detailed insight into the overvoltages from the point of view of insulation coordination applications. In this paper, a statistical analysis of the overvoltage variations of the step-up transformer during vacuum circuit breaker operation is conducted. Some variables, including switching angle, current chopping, high-frequency current quenching capability, and wind turbine power, are assumed as random variables. Besides, some indicators representing the switching overvoltage characteristics such as the amplitude, the number of restrikes, and the rate of rise are extracted. By performing a probabilistic analysis, the destructiveness due to switching overvoltages on typical transformer insulation can be investigated. The sensitivity of different surge protective devices and their effectivities are also analyzed and statistically evaluated. The applied methodology is very useful because of the stochastic nature of the switching overvoltages. In this work, the impact of protective equipment on each of the overvoltage indicators is analyzed. It is also found that considering only the amplitudes of transient overvoltages is not enough to draw conclusions about the safety of the transformer when exposed to frequent switching surges.

AB - Vacuum circuit breaker operation causes transient overvoltages that may lead to severe damages to transformer insulation. Since the parameters affecting these overvoltages have stochastic nature, a statistical analysis may provide detailed insight into the overvoltages from the point of view of insulation coordination applications. In this paper, a statistical analysis of the overvoltage variations of the step-up transformer during vacuum circuit breaker operation is conducted. Some variables, including switching angle, current chopping, high-frequency current quenching capability, and wind turbine power, are assumed as random variables. Besides, some indicators representing the switching overvoltage characteristics such as the amplitude, the number of restrikes, and the rate of rise are extracted. By performing a probabilistic analysis, the destructiveness due to switching overvoltages on typical transformer insulation can be investigated. The sensitivity of different surge protective devices and their effectivities are also analyzed and statistically evaluated. The applied methodology is very useful because of the stochastic nature of the switching overvoltages. In this work, the impact of protective equipment on each of the overvoltage indicators is analyzed. It is also found that considering only the amplitudes of transient overvoltages is not enough to draw conclusions about the safety of the transformer when exposed to frequent switching surges.

KW - Switching transients

KW - Vacuum circuit breaker

KW - Statistical transient

KW - Restrikes

UR - http://www.scopus.com/inward/record.url?scp=85077933408&partnerID=8YFLogxK

U2 - 10.1016/j.epsr.2020.106204

DO - 10.1016/j.epsr.2020.106204

M3 - Article

VL - 182

SP - 1

EP - 9

JO - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

M1 - 106204

ER -

ID: 68858938