An Approach to Performing Stability Analysis for Power Transformer Differential Protection: A Case Study

Differential protection normally detects short circuits and ground faults in the windings of a power transformer its terminals. Inter-turn refer to flashovers among electrodes that arise only similar type physical winding. can be examined when adequate sum turns is served as short-circuited. In electrical protection, it difficult detect inter-turn faults. An fault small magnitude based on limited number resultantly provide large quantity current. Due this reason, comes from differential scenario possesses higher degree sensitivity without causing unwanted operations during external paper, protection-based stability method proposed whereby voltages are applied at low-voltage (LV) side while keeping high-voltage (HV) This was conducted using three-phase (rating: 100 MVA, 380 kV/13.8 kV) SWCC Shoaiba Power Plant, Saudi Arabia. work, (87T) high-impedance for HV-restricted earth (REFs) were verified by creating In-Zone Out-Zone conditions ensure current (CT) tripping logic. All IEDs, control schemes involved designed ABB. verifies transformers implementing restricted (64HV) through conditions.