Wide-Band Harmonic Interaction and Characteristic Analysis of FCTPSS

Connecting renewable energy system (RES) and hybrid energy storage system (HESS) to railway traction power supply system is the future development trend, which will cause new harmonic resonance problems.In order to analyze the harmonic resonance problems, a flexible cooperative traction power supply system (FCTPSS) connected with RES and HESS is studied in this paper. Based on the harmonic transmission theory, a mathematical models of harmonic transmission of traction power supply system (TPSS) and FCTPSS are established. The simulation models of the TPSS and the FCTPSS are built in MATLAB/Simulink, and the harmonic transmission characteristics of TPSS and FCTPSS are compared and analyzed. The results show that the location of the locomotive has an influence on the harmonic transmission characteristics, and the access of RES and HESS can make the resonant frequency to shift to the right.