Power Research

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Failure Analysis of OLTC during Transition Resistor Test


Affiliations
1 CPRI, Bhopal - 462023, Madhya Pradesh, India
     

   Subscribe/Renew Journal


Emerging modern technologies and ever-changing demands compete with each other to bring new changes to the sociotechnical life of human beings. OLTC is one such equipment connected as an integral part of the transformer to change the turns ratio while the transformer is in energized condition, to adjust the output voltage. Changing times and technology brought many changes in the OLTC techniques, design and operation. Traditionally OLTC is a complex mechanical device, which has some deficiencies. OLTC design elements are checked during the transition resistor test. Thus, OLTC testing for transition resistors is a method to enhance the reliability of OLTC design. This paper discusses a typical failure case of OLTC during the transition resistor test conducted in CPRI.

Keywords

On Load Tap Changer (OLTC), Transition Resistor and Mechanical Device.
User
Subscription Login to verify subscription
Notifications
Font Size

  • IEC standard 60214- 1: Tap changers Part 1: Performance requirements and test methods; 2014.

  • Redfern MA, Handley WRC. Duty based maintenance for on-load transformer tap changers. IEEE; 2001. p. 1824-29. https://doi.org/10.1109/PESS.2001.970355 DOI: https://doi.org/10.1109/PESS.2001.970355

  • Gao D. A new scheme for on-load tap changer of transformer. IEEE; 2002. p. 1016-20.

  • Martins HJA, et al. Failures/Solutions in on load tap changer, 145kV. IEEE. 1998. p. 43-48.

  • Govindappa BV. Recent trends in on-load tap changer technology- A study. Tutorial on- On load tap changer as per IS & IEC standards; 2011. p. 97-118.

  • Pathak S. Switching test On-Load Tap Changer (OLTC). Tutorial on- On load tap changer as per IS & IEC standards; 2011. p. 69-96.

  • Rogers DJ, Green TC. A hybrid diverter design for distribution level on-load tap changers. IEEE; 2010. p. 1493-1500. https://doi.org/10.1109/ECCE.2010.5618245 DOI: https://doi.org/10.1109/ECCE.2010.5618245


Abstract Views: 121

PDF Views: 0




  • Failure Analysis of OLTC during Transition Resistor Test

Abstract Views: 121  |  PDF Views: 0

Authors

T. Prabakaran
CPRI, Bhopal - 462023, Madhya Pradesh, India
M. K. Wadhwani
CPRI, Bhopal - 462023, Madhya Pradesh, India
Sumbul Munshi
CPRI, Bhopal - 462023, Madhya Pradesh, India
Himangshu Roy
CPRI, Bhopal - 462023, Madhya Pradesh, India
Saumitra Pathak
CPRI, Bhopal - 462023, Madhya Pradesh, India

Abstract


Emerging modern technologies and ever-changing demands compete with each other to bring new changes to the sociotechnical life of human beings. OLTC is one such equipment connected as an integral part of the transformer to change the turns ratio while the transformer is in energized condition, to adjust the output voltage. Changing times and technology brought many changes in the OLTC techniques, design and operation. Traditionally OLTC is a complex mechanical device, which has some deficiencies. OLTC design elements are checked during the transition resistor test. Thus, OLTC testing for transition resistors is a method to enhance the reliability of OLTC design. This paper discusses a typical failure case of OLTC during the transition resistor test conducted in CPRI.

Keywords


On Load Tap Changer (OLTC), Transition Resistor and Mechanical Device.

References





DOI: https://doi.org/10.33686/prj.v18i2.222174