The Research On Differential Selective Leakage Protector

This paper proposes the new method which based on the zero sequence current byartificial neutral compensation differential selective leakage protection, throughanalyzing the power system leakage model and multidrop power supply system of eachbranch zero sequence current logical relationship. aiming at the existed questions of thepower system elective leakage protection at present, combining the distributionrelationship of the each branch zero sequence current, Structuring artificial neutral andcomparing the artificial neutral point and zero sequence current RMS size in differentcompensation mode.Using Matlab/Simulink software,I make the Simulation Verification which verifiesfeasibility of the method to the differential route selection principle. Based on thedifferential route selection, I make the Differential selective leakage protector whichbuilds on TMS320F2812controller, the protector make the detail introduction to thesystem Software and hardware. Building the experiment model in the laboratory, whichrealize the selective protection for leakage fault protection of the power supply system.This paper also analyses the routes of interference of system and propose the effectivesolutions.