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The EMC Analysis and Design about Supervisory System of Catenary Switches

Author: GuoGe
Tutor: LiuHuiDe；JinFuQun
School: Southwest Jiaotong University
Course: Electrical Engineering
Keywords: Traction power supply system The Catenary switch monitoring system Electromagnetic interference Electromagnetic compatibility
CLC: U225
Type: Master's thesis
Year: 2010
Downloads: 145
Quote: 3
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Abstract


With the large-scale construction of high - speed electrified railway in China , supply reliability and more attention. Catenary switch monitoring system is an important technique for traction power supply system fault isolation , run directly related to the stability and reliability of electrified railway transportation and production . Catenary switch monitoring system environment in which electromagnetic interference , failure to make it run . Therefore, the catenary switch monitoring system electromagnetic compatibility research and design has a certain practical significance . First, a more detailed introduction of domestic and outdoor types of catenary switch monitoring system application status on the basis of comparative analysis of the advantages and disadvantages of centralized and distributed two catenary switch monitoring system , discusses the basic theory of the electromagnetic compatibility and catenary switch monitoring system electromagnetic interference sources and hazards , laid the foundation for later study . Second , focusing on centralized control cable catenary switch monitoring system electromagnetic compatibility problem . Are given the AT equivalent circuit diagram of the power supply , and AT power supply control cable signal simulation model , and on this basis, a series of simulation analysis to verify the traction power supply system of the cable signal electromagnetic interference , it is prone catenary switch malfunction the remote signaling signal of false positives . Cable length, harmonics and voltage fluctuation the signal effects between the cable core simulation analysis found that the cable length , harmonics or ripple and voltage fluctuations can cause the the core current signal crosstalk , the current signal distortion control cable transmission . Finally , focusing on design the hierarchical distributed fiber transmission medium catenary switch monitoring system . Discusses the detailed configuration of the system . Due to the electromagnetic interference potential hazards , the system , the overall design of electromagnetic compatibility . The circuit components selected from the perspective of electromagnetic compatibility , electromagnetic compatibility design from circuit design , PCB design and chassis design aspects of the remote I / O unit . A number of experimental results show that , using optical fiber as the transmission medium distributed catenary switch monitoring system EMC design has made the success of the system in the stable and reliable operation of the site to further verify the effectiveness of the design of electromagnetic compatibility .

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CLC: > Transportation > Rail transport > Electrified railway > Catenary
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