power system of urban rail transit

 

 

ZHENG Daqian, WANG Huifang, HE Bengteng

 

(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

 

 

Abstract: Aiming at lacking of effective verifications for value setting of relaying protection component in DC traction system of railway transportation, development of simulation verification software was proposed. Based on the study of demand of the software, the function architecture was put forward. Based on technology of software development, DC flow calculation and setting value verification, a designing method for such software was introduced by focusing on aspects of designing of graphical interface, selection of short circuit calculation model and verification of protection setting value of DC feeder line breaker. At last, simulation of this software was verified with the case of the real DC traction system in Shanghai. The results indicate that proposed software is able to realize several functions including fault simulation and computeraid verification. It can also guide the selection and adjustment of value setting of relaying protection system to decrease frequency of rejection and malfunction.

 

Key words: urban rail transit; DC traction power system; short circuit calculation mode; relay protection setting values verification