Further Research On Self-healing Reorganization Of Traction Power Supply System

With the continuous development of traction power supply technology,the existing relay protection schemes expose more and more deficiencies.For example,in case of permanent failure of the system,the relay protection equipment will make the whole power supply lose power,which greatly restricts the power supply capacity.With the in-depth study of digital traction substation,the construction of a highly automatic traction power supply system is of great significance to improve the reliability of the system and reduce the economic losses caused by long-term power failure.In this paper,aiming at the power supply system from Huang Tudian substation of Beijing Zhangjiakou intelligent high-speed railway to Siying Village section post,a mathematical model based on the idea of fault self-healing and reorganization is proposed through combing the equipment and contact line faults.In order to cut off the fault zone and restore the maximum power supply load,the priority searching algorithm theory is used to restructure the system after the fault.According to the characteristics of traction power supply system,the scheme of fault self-healing and reorganization in non cross district power supply mode,cross district power supply mode are discussed in detail as the basis of practical application and simulation verification of the project.How to realize self-healing reorganization when the fault information is known is the focus of this article.The IEC61850 standard is used to model the equipment of the whole power supply system in a unified way.The Access 2010 software is used to build the database.The automatic generation of self-healing process function is realized through the research of relevant algorithms and the establishment of the corresponding rule base for switch operation.DSP of ADI is used to develop embedded program to realize the functions of self-healing.Using real-time digital simulator,a complete model of traction power supply system is built.Based on IEC61850 communication protocol,RTDS and self-healing recombination equipment are correctly configured.After simulating the fault,the fault information will be analyzed by the self-healing and reorganization equipment.The equipment will generate the self-healing process automatically and execute it to verify the correctness of the self-healing and reorganization scheme.This will provide engineering application experience for the selfhealing function design of digital traction power supply system.