Voltage Unbalance, Power Factor and Losses Optimization in Electrified Railways Using an Electronic Balancer

Abstract

Unbalanced currents, low power factor and high losses contribute to increasing the bill infrastructure managers must pay to the TSO/DSO operator that supplies electric energy to the railway system. Additionally, if regenerative energy coming from braking regimes is not allowed to be injected into the grid or even is penalized when it occurs, then the optimization of those parameters must be pursued. One of the possible measures that can be taken to counteract those phenomena is the installation of electronic balancers in heavy loaded substations in order to optimize the interface to the three-phase electric grid. This paper shows the benefit of such use taking examples from real conditions and realistic simulations assumed equivalent to field measurements.

Research on an Adaptive Compound Control Strategy of a Hybrid Compensation System

“…The rapid development of power electronics has led to their increasing popularity and usage in distribution grids, resulting in a significant rise in non-linear loads [1][2][3][4]. These loads generate notable harmonic currents and reactive power losses that have adverse impacts on both power quality and economic operation [5][6][7][8][9]. To address this issue, a hybrid compensation system that combines an Active Power Filter (APF) and a Thyristor Switching Capacitor (TSC) has been utilized [10][11][12].…”