For solving effectively the problem of low voltage at the end of rural power network

a kind of new design proposal of automatic voltage stabilizing device with auto transformer for voltage change and AC contactor for voltage regulation is proposed through comparison present common management measures with purpose of achieving to stabilize end voltage of the user by way of monitoring variation of line voltage andbytheuseofACcontactortoadjustcorrespondinglytheprimaryandsecondarysidetransformationratio of the auto transformer. The prototype of automatic voltage stabilization device of the line is established and the voltage stabilization performance test on the prototype is performed. It is shown by the test result that the prototypecanrealizethepresettargetofvoltagestabilizationwithlessinfluenceonthepowersupplystability of the user. The proposal

compared to the design proposal of automatic voltage stabilization device of other line

has simpler circuit structure

high reliability and

on the premise of assuring voltage stabilizing result

reduces the function achievement cost and hasdefinitereference significance for innovating the technology proposalofsimilardevice.