Multi-Scale and Multi-Physical Domain Modeling and Simulation Method for Urban Rail Traction Power Supply System
Zhang Gang1, Wang Yunda1, Liu Zhigang2, Yu Hong1, Qiu Ruichang1
1. School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China; 2. Rail Transit Electrical Engineering Technology Research Center Beijing 100044 China
Abstract：The actual operation of the urban rail transit traction power supply system involves the coupling effect of electrical, magnetic, thermal, mechanical and other physical domains, as well as the change process of multiple time and space scales. However, the traditional modeling and simulation method has scale separation and single mechanism, which is difficult to describe and analyze the state of multi-scale and multi-physical domain of the system. Therefore, a multi-scale and multi-physical domain modeling and simulation method for the urban rail traction power supply system was proposed. The system level modeling framework of multi-scale and multi-physical domain was designed by the Simscape platform and the idea of modularization, componentization and visualization modeling. Based on the parallel cooperative interaction strategy, a multi-scale simulation method with adaptive observation mode was proposed to realize the organic and efficient combination of multi-scale models. Based on hierarchical multi-domain feedback, a system level multi-physical domain simulation method was proposed to ensure the coupling interaction simulation of the multi-physical domain model. Finally, the effectiveness of the proposed modeling and simulation method was verified by simulation. It is shown that the multi-scale and multi-physical domain models can describe the macro and micro characteristics of the system in multiple physical domains, and characterize the actual physical process of the system operation.
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2022, Vol. 37 
