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नेशनल हाई स्पीड रेल कॉर्पोरेशन लिमिटेड

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Reliability Planning for 2x25 kV Traction Power Supply System: Fault Severity and Contingency Analysis

By Kritika Barman, Archita Vijayvargia and Abhijit R. Abhyankar  
Department of Electrical Engineering, 
Indian Institute of Technology, Delhi, India  

Abstract - The involvement of autotransformers in a 2x25 kV traction system increases the severity of faults. Unattended faults lead to component failure, making reliability planning essential for the system. This paper proposes a method of estimating the fault current variation with fault location using a node-admittance matrix-based approach. The system is further analyzed during various contingencies to ensure a robust design, and its performance is enhanced using Static Var Compensators (SVCs). An optimal voltage compensation algorithm is proposed to trigger in the event of any outage. A comparative analysis is presented on a 30 km sample feeding section, with SVCs placed at the substation and then at the sectioning post.

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