A Study Of Capacity Calculation Of Regenerative
Inverter For 1500V DC Traction System
Author(s)
C. H. Bae, M. S. Han, Y. K. Kim, S. Y. Kwon & H. J. Park
Abstract
The paper presents methods of determining the capacity and installation
positions of regenerative inverters installed in 1500V DC electric railway
system. We suggested a method that calculates using regenerative power
obtained from Train Performance Simulation (TPS) and Power Flow Simulation
(PFS). We carried out TPS and PFS for Seoul Subway line 5 and 6, calculating
regenerative power and determining substations where regenerative inverters
would be installed and the optimal capacity and number of inverters to be
installed.
Keywords: regenerative inverter, electric railway system, train performance
simulation, power flow simulation.
1 Introduction
In DC electric railway system, 22.9kV system voltage is converted to DC 1500V
voltage through a 3-phase silicon diode rectifier and supplied to motor cars.
Because, in case of diode rectifiers, regenerative power generated at the
regenerative braking of motor cars cannot be absorbed into the supply grid, the
power is used at nearby powering trains or consumed as heat at resistances
mounted on the cars. However, if a regenerative inverter is installed in inverseparallel
with the diode rectifier, it absorbs dump regenerative power consumed at
the resistance and transmits it to a high-voltage switchboard for reuse. In this
way, energy can be saved by reusing dump regenerative power wasted away as
heat and the braking and ATO performance of motor cars can be improved
through enhancing the regenerative power absorption rate of catenary lines.
Despite these advantages, regenerative inverters cannot be installed in all
substations for electric railways because the cost of manufacturing and installing
regenerative inverters is higher than the benefit from the use of regenerative
Keywords
regenerative inverter, electric railway system, train performance
simulation, power flow simulation.
Related Book
Other papers in this volume
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