The Research Of Electromagnetic Compatibility Of Microcomputer Relay Protection Device Interfaced With Electronic Transducer

In the past several years, electronic transducers based on electronic and optical technology, show vast application foreground and developing potential. Microcomputer relay protection device run in subsation where electromagnetic environment is very bad.The electromagnetic compatibility level and relability of the device are vital to the safe and stable running of power system.The microcomputer relay protection device interfaced with electronic transducer adjust to the trend of decentralized installation.But it would suffer from worse electromagenitic interference experiments as other device and whether it can pass the pattern experiments would be a key factor to its large-scale promotion and application.The main content of the paper include:(1)It first simply introduces the background,principle and classification of the electronic transducers, then elaborates the mixed electronic transducers with the forms of modes,electric circuit or diagram .(2)It establishes the transmission path of electromagnetic interference of substation's typical interferences with the analytic method of three main factors, proposes the necessity of electromagnetic compatibility system design and concrete solutions after it analyses the basic principle of electromagnetic interference.(3)In view of the electromagnetic compatibility requirement of micro-computer relay protection device ,it carries on in turn electromagnetic interference influence analysis and path analysis of power port,switch value port,data acquisition port and communication port, at last effective actions are given separately to every port.(4)As the 110 kV microcomputer line relay protection device for example, it confirms the achievement of the paper, through the detailed analysis to experiment phenomenon, effective solution are proposed and at last the device pass successfully the electromagnetic compatibility pattern experiments.