Abstract
Because of using the nonlinear high-power load, the electrified railway has serious harmonic problems. Aiming at the electrified railway power quality problems, this paper has established averaging active power filter model, and designed the H-infinity controller. Through containing all kinds of disturbance, ensure active power filter to approaching track complex current signal, thus improve the robustness of systems. Simulation results show that electrified railway harmonic control effect is good based on H-infinity control. Under parameter perturbation, THD relatively small changes, the system has strong robustness. In comparison with the hysteresis controller, H-infinity controller has a better control effect. Therefore, based on H-infinity control of active power filter in electrified railway harmonic control has wide application prospects. DOI: http://dx.doi.org/10.5755/j01.eee.19.3.3694
Highlights
China’s electrified railway power supply adopts singlephase AC traction system
We introduced some high-speed trains, with AC-DC-AC rectifying mode, which can basically solve the power factor and harmonic current issues of the locomotive side
Electrified railway harmonic, reactive power and negative sequence are the important issue referring to electrified railway power quality problem [1]
Summary
China’s electrified railway power supply adopts singlephase AC traction system. Most tractions using pulse stream DC motor by smoothing reactor to suppress current ripple. Electrified railway harmonic, reactive power and negative sequence are the important issue referring to electrified railway power quality problem [1]. As the train speed in rail transport, the increase of traffic density and load, the load of traction electric network is increasing, the influence of harmonic, reactive power and negative sequence on power system is bigger, research on electrified railway quality on power systems and the influence of power system and electrified railway themselves are significant. Solutions of electrified railway power quality problems include the comprehensive management of harmonic, reactive and negative sequence current. Power quality problems in electrified railways, the use of active power filter to suppress harmonics of the electric railway. Hinfinity controller design based on linear systems, through variety of interference suppression to ensure that the complex active power filter system asymptotically tracks the current signal of the complex instructions to improve the robustness of the system
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