Train-rail Circuit Currents and Overvoltage Suppression Based on Particle Swarm Algorithm
The train body rail circuit current and train body over-voltage problems in the grounding system of high-speed EMUs will cause train body voltage rise,and worsen the electromagnetic environment of the train body,leading to problems such as vehicle borne weak current and communication system damage,which will seriously affect the safe operation of Multiple unit.Focusing on the problems of train body rail circuit current and train body potential,the equivalent model of high-speed train dynamic operation of Multiple unit is established.Based on the model,the measured and simulation results are compared and analyzed.The distribution of train body transverse and longitudinal over-voltage and the propagation law of over-voltage in the train body when the Multiple unit is in over-voltage phase separation section are studied.Based on the actual measurement and simulation results,the distribution of the current in the train body rail circuit was analyzed.Finally,a comprehensive consideration of the train body rail circuit current and the harm value of the train body overvoltage was given combined with particle swarm optimization algorithm to provide an optimal solution for the reference constant grounding parameters,so that the optimized overvoltage amplitude of each train body and the current amplitude of each grounding axis are in a more balanced range.
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