Device for automatically measuring leakage current of lightning arrester and test method thereof

A device for automatically measuring the leakage current of a lightning arrester and a test method thereof are characterized in that a power frequency rectification unit and an LC filtering unit are used for converting constant direct current into adjustable direct current, then a control unit is used for controlling the output voltage of a direct current chopping unit, and then the output voltage is converted by an inversion unit and boosted by a transformer unit; and then the voltage is connected to the lightning arrester after passing through the voltage doubling rectifying unit. The output of the voltage doubling rectifying unit is connected with the current sampling unit and the voltage sampling unit, and the control unit controls an output PWM signal according to a collected current or voltage signal so as to control the output voltage of the direct current chopping unit. According to the invention, the existing manual adjustment is improved into automatic adjustment of the controller, and automatic mea