Abstract:This paper studies the problem of low terminal voltage in a certain distribution line after connecting specific loads. The basic situation of the line is described, including the load connection time, line length, wire diameter, and load type and power. The causes of low voltage are analyzed in detail, and the practical process of solving the problem by adding an automatic voltage regulating transformer at the terminal is focused on. The effect is evaluated and summarized to provide reference for solving similar voltage problems in distribution lines.