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The Design and Research of 2M Channel Switching Device for Pilot Current Differential Protection

Author: HanLiangLiang
Tutor: HouSiZu
School: North China Electric Power University
Course: Communication and Information System
Keywords: Longitudinal differential protection 2M switching device Reliability
CLC: TN929.11
Type: Master's thesis
Year: 2011
Downloads: 22
Quote: 0
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Abstract

Currently, the power communication network, a growing number of longitudinal current differential protection 2M circuit as a transmission channel, 2M channel transmission requirements are also increasing. Longitudinal current differential protection based on the electrical equipment inlet and outlet both ends of the changes in the current difference is used to protect electrical equipment. And rapid excision for the fault has a good selection of properties, while its high sensitivity, and therefore has a pivotal role in power system protection. The use of optical fiber transmission signals in optical fiber communication process can ensure that the signal from electromagnetic interference, and the large capacity of optical fiber transmission, the differential protection signal channel more and more using Fibre Channel. SDH self-healing network function can ensure a rapid conversion to another intact line a transmission line failure occurs, but inconsistent routing of signal transmission and reception, and the longitudinal current differential protection is required to send and receive the routing must be consistent. Therefore a need for a device to be related to the switch so as to ensure the accurate transmission and reception of the differential protection. The main principle of switching means, analyzes the lossy the switching characteristics of the switching and lossless handover based design of the switching device, and provides a reference for the future practical design and application. First, the principle of the longitudinal current differential protection analysis to understand the characteristics of the longitudinal current differential protection analysis of differential protection how to achieve rapid excision of the failure of the electrical equipment. What form the effective transmission signal of the differential protection. Secondly, for the transmission link failure, how to achieve fast and efficient switching theory research. Introduces the basic principles of 2M switching device protection switching mechanism, and undermine the principle and characteristics of the switching and lossless switching compared. Once again, the combination of switching principle of the design of the switching device, the device including a power supply module, control module, switch module, interface module. The power supply unit with dual power mode. The control module for the monitoring and control of the channel. Upon receipt of an alarm signal when the switching module with the channel switching. Interface module that implements the interface communication and network management functions. Finally, an experiment designed switching equipment for verification. Experimental platform to record the detrimental impact of switching and lossless handover process to protect the information and analysis comparing the characteristics of different switching mode.

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