关键词: 地线扰动, 地线电流, 干扰抑制, 自动补偿

Abstract: This study analyzes the main causes and ways of ground wire interference and points out several measures to suppress ground wire interference.At the same time,in order to solve the problem that diffence mode voltage formed by the ground wire current through the ground wire impedance has an influence on the high-precision measurement performance,a solution based on the ground wire current automatic compensation technology is proposed.With this technical solution,the direct current and the clutter noise current flowing through the ground wire can be automatically compensated to zero,even if the ground wire has DC resistance and AC impedance.And thereby the accuracy of system signal can be improved.

Key words: Ground wire disturbance, Ground wire current, Interference suppression, Automatic compensation