97. Modeling for Interference Coupling Path of Data Acquisition System of Microprocessor Protection Device

The electromagnetic compatibility of the data acquisition system for microprocessor-based protection device was studied and the main work was modeling and simulation for interference coupling path under the electrical fast transient pulse interference signal. Firstly, the input and output data of the interference transmission channel was obtained through the standard electromagnetic compatibility test experiment. Secondly, the data was processed mainly by the identification and the vector matching, and then got the state-space model. Lastly, the simulation model was established by the equivalent circuit in Pspice, which was verified correct through the comparison between simulation and experimental results. The method to establish interference channel model and obtain conclusions have important practical significance to improve the electromagnetic compatibility of microprocessor-based protection.