Method and device for acquiring voltage reference signal of lightning arrester live-line test

The invention relates to a method and a device for acquiring a voltage reference signal of a lightning arrester live test. The method for acquiring the voltage reference signal of the lightning arrester live test comprises the following steps: acquiring any power supply signal in a transformer substation; adjusting the power supply signal to obtain a first voltage signal with the same phase as thesecondary voltage signal of the voltage transformer; and taking the first voltage signal as a voltage reference signal. According to the voltage reference signal acquisition method for lightning arrester live test, the power supply signal in the transformer substation is selected as the source of the voltage reference signal, and the voltage signal does not need to be extracted from the secondaryvoltage of the voltage transformer as the voltage reference signal, i.e., the secondary terminal does not need to be contacted, so that the wrong secondary terminal cannot be touched by mistake, anda primary equipment power f