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-…

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

Abstract - The paper presents a simple approach to determine optimal substation spacing in a 2x25kV traction power supply system (TPSS). Economy, being one of the significant design parameters of TPSS, is affected by the number of traction substations (TSS) or distance between them. Hence, this paper highlights the…

By Uppuluri Suryavalli, Vaibhav Vivek Deshmukh and V. S. S. Pavan Kumar Hari  
Department of Energy Science and Engineering, 
Indian Institute of Technology Bombay, Mumbai, India  

Abstract - Analytical evaluation of the harmonic spectra pertaining to pulse width modulated (PWM) voltage waveforms, using double Fourier series, is a computationally intensive exercise. This paper presents simple closed-form expressions for the Fourier coefficients of output voltage in a…

By Himanshu Mishra, R. Gnanavignesh and G. Narayanan  
Department of Electrical Engineering, 
Indian Institute of Science, Bangalore, India  

Abstract - Electrification of railway systems, increasing operating speeds of trains, and introduction of high-speed trains have renewed the need for detailed study on traction power supply systems. This paper reviews two technical standards on traction supply systems, namely, EN50163 and EN50388. These standards are related to…