Ground potential rise detection system and power transmission line lightning stroke condition determination method

The invention relates to a ground potential rise detection system and a power transmission line lightning stroke condition determination method. The ground potential rise detection system is characterized in that a sharing device individual grounding device of a sharing device is connected through a sharing device ground lead wire; the sharing device individual grounding device is independent froma sharing electric power tower grounding device, and is used as the zero potential of the ground potential rise detection system; the sharing electric power tower grounding device and the sharing device individual grounding device are connected, and a ground potential rise detection device is used for measuring the potential difference between the sharing electric power tower grounding device andthe sharing device individual grounding device; and a data processing unit of the ground potential rise detection device is connected, and is used for receiving the measurement data output from the ground potential rise detec