A high-speed railway traction network-multi-car coupling system half-physical simulation experiment system

Abstract

The invention discloses a high-speed railway traction network-multi-vehicle coupling system semi-physical simulation experiment system, comprising a dSPACE real-time simulator, a physical controller and a PC upper computer; the dSPACE real-time simulator transmits the simulated electrical quantity through a physical data transmission line through an IO interface to the physical controller; the physical controller transmits the PWM wave output by the control algorithm to the dSPACE real-time simulator through the digital IO port to control the on and off of the IGBT; the PC host computer communicates with the dSPACE real-time simulator for simulation System main circuit modeling, model compilation, model download, real-time monitoring of model data, and compilation and download of locomotive control codes; physical controllers include switching power supply modules, system management controllers, analog public input modules, centralized line control modules and pulse Conversion module. The invention can reproduce the operating conditions of 8 high-speed railway motor cars, and comprehensively study the stability problems of the high-speed railway traction network-multi-car coupling system such as low-frequency oscillation, harmonic resonance and harmonic instability.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicle network electrical relations, in particular to a semi-physical simulation experiment system for a high-speed railway traction network-multi-vehicle coupling system. Background technique [0002] In recent years, with the increase in the operating mileage of electrified railways in my country and the demand for transport capacity, "AC-DC-AC" electric locomotives and EMUs (Electric Multiple Units, collectively referred to as locomotives) have been put into use at high density. A large number of power electronic converters are connected to the traction network, making the railway multi-car parallel system (vehicle-network system for short) a typical single-phase power electronic system. The locomotive is a typical source of harmonics and interference in the vehicle-network system, and its high-density input will reduce the voltage and power quality of the traction network, further deteri...

AI Technical Summary

Problems solved by technology

From 2008 to 2014, in Beijing, Shenyang, Shanghai, Xuzhou, Datong and other ground train stations and locomotive depots, there were traction blockades caused by low-frequency fluctuations in the traction network voltage, causing locomotives to fail to start on time

It is difficult to verify the authenticity of the mechanism of various instability phenomena proposed and the application effect of various suppression measures in the actual vehicle network system

Images