Short-circuit protection analysis method and short-circuit test method for urban rail transit traction system

• Main Authors: WANG TINGTING, CHEN JINHENG, SUN GUOBIN, ZHANG ZHEXU, HAN BING, CAO HU, ZHANG RUNZE
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a short-circuit protection analysis method and a short-circuit test method for an urban rail transit traction system. The analysis method comprises the following steps: building an equivalent circuit model in a simulation environment according to a main circuit of a system during a short-circuit fault; setting different short-circuit working conditions according to the parameters influencing the short-circuit current during the short-circuit fault; determining the selection of electrical measurement quantity and the position of a measurement point according to the operating characteristics of each level of protection device; after parameters of an equivalent circuit model are set according to the short-circuit working condition, performing simulation through the equivalent circuit model according to the electrical parameters of the traction power supply system and the short-circuit working condition parameters, and obtaining a short-circuit current waveform; and according to the short-c