Int J Performability Eng ›› 2018, Vol. 14 ›› Issue (3): 425-433.doi: 10.23940/ijpe.18.03.p3.425433

• Original articles • Previous Articles     Next Articles

Analyzing Short Circuit Forces in Transformer for Double Layer Helical LV Winding using FEM

Deepika Bhallaa, Raj Kumar Bansalb, and Hari Om Guptac   

  1. aIK Gujral Punjab Technical University, Kapurthala, Punjab,144 603, India
    bGuru Kashi University, Talwandi sabo, Punjab, 151 302, India
    cJ. P. Institute of Information Technology, Sector 128, 201 314, India


In medium and high capacity transformers where current rating is high and the number of turns is low, the low voltage (LV) winding is generally of the helical type. These helical windings have very large magnitudes of electromagnetic forces during a short circuit. This is due to the inherent asymmetry of helical structure. The objective of this work is to use the finite element method to compute the radial and axial components of short circuit forces and identify areas of high stresses in the windings. This can be used to find the likely reason of transformer failure during a short circuit. For this work, a 3-phase power distribution transformer of 11kV/433V, 630kVA rating is considered. The effect on short circuit forces of the tapping in the center of HV winding is also studied.

Submitted on May 9, 2017; First revised on July 30, 2017; Second revised on January 11, 2018; Accepted on January 14, 2018
References: 14