• Corpus ID: 39325047

Switching Surges in Transformer Provoked by Sequential Tripping of Circuit Breakers

  title={Switching Surges in Transformer Provoked by Sequential Tripping of Circuit Breakers},
  author={Ivo Ugle{\vs}i and I. Ivankovi and V. Milardi},
A study of switching surges in a 400/110 kV substation was carried out in order to detect the causes of severe damage to the power transformer, which happened after a busbar fault. The busbar protection generated tripping signals for several circuit breakers and after their sequential tripping, the surge arresters installed on the 10.5 kV stabilizing windings inside the transformer were destroyed. The computer simulations were carried out on an appropriate model, which was developed for the… 



Transients Caused by Sequential Circuit Breaker Tripping Issued by Busbar Protection

The conclusion can be drawn that such a substation fault should have no influence on excessive overvoltages that can threaten the insulation of components in the substation.

Voltage stresses in a distribution transformer under nonideal switching conditions

  • O. Soysal
  • Physics, Engineering
    IEEE Power Engineering Society. 1999 Winter Meeting (Cat. No.99CH36233)
  • 1999
Failure of a 1600 kVA molded type distribution transformer due to switching surges is investigated through computer simulations. The transformer was supplying a motor bank in an industrial plant from

Numerical calculations of three-phase transformer transients

A three-phase, two-winding transformer model is presented in this paper. Nonlinear magnetizing curves are piecewise linearized, while the input winding capacitances are lumped onto the transformer

Reliable busbar protection with advanced zone selection

Modern digital relays use innovative algorithms to fulfill busbar protection requirements of fast operating times for all busbar faults, security for external faults with heavy current-transformer

Fuzzy neuro approach to busbar protection

  • H. K. Zadeh
  • Engineering
    IEEE Power Engineering Society General Meeting, 2005
  • 2005
This paper presents a new approach for busbar protection with stability current transformer saturation using Fuzzy neuro and symmetrical component. This technique uses symmetrical components of

Labuschagne : " Reliable busbar protection with advanced zone selection " , IEEE Trans

  • 2005

Morooka: "Lightning Protection of Pole-Mounted Transformer of Japanes MV Lines

  • CIGRE Session 2004,
  • 2004

Soysal : " Voltage Stresses in a Distribution Transformer Under Non - Ideal Switching Conditions "

  • IEEE Transactions on Power Delivery
  • 2005