HarmonicPowerFlowCalculation方案.PDFVIP

Chapter 2 Harmonic Power Flow Calculation for High-Speed Railway Traction Power Supply System Bin Wang, Xu dong Han, Shi bin Gao, Wen Huang and Xiao feng Jiang Abstract This paper describes a harmonic analysis model for CRH2 EMU (Electric Multiple Unit) and provides a harmonic power flow algorithm for its traction power supply system. This algorithm gives full consideration to coupling influence between the traction networks (harmonic voltage), and the fundamental wave results are used as the final convergence condition, aiming to determine modulation characteristics and harmonic current characteristics of SPWM converter for EMU based on results of harmonic power flow, and to calculate harmonic power flow and to update funda- mental power of harmonic source for fundamental power flow calculation. Analysis of harmonic power flow with single harmonic source and multi-harmonic sources shows that the algorithm is applicable to traction power supply system of high-speed rail with single harmonic source, multi-harmonic sources, and background harmonic. Keywords Locomotive and network coupling system Harmonic power flow EMU harmonic model Harmonic coupling admittance matrix 2.1 Introduction Electrified railway is always one of the main harmonic sources of electric power system; and high-speed railway directly accesses HV electric power system of 220 kV or higher voltage. For the purpose of effectively calculating and analyzing distribution characteristics of harmonic in traction network and its permeability characteristics toward electric power system, harmonic power flow of traction power supply system needs to be analyzed and calculated [ 1, 2]. Firstly, harmonic characteristics of locomotive as well as the coupling link between its harmonic voltage and harmonic current need to be established, so as to B. Wang () X. d. Han S. b. Gao W. Huang X. f. Jiang School of Electrical Engin