Patent ID: 6259255
Filing Date: 2001-07-10
Classification: G01R

Abstract:
A surge locating system of a power transmission line for locating a point where a surge occurs by receiving in at least two stations independently the surge which occurs on a power transmission line, said surge locating system of a power transmission line comprising:surge detecting means in each station for detecting a surge which occurs on the power transmission line, said surge detecting means being connected to a neutral point of a secondary side of a wire wound grounding potential transformer (GPT) connected to said power transmission line;said surge detecting means including surge judging means which determines a surge arrival time when a surge is detected having a voltage higher than a predetermined level;time difference calculating means in communication with said surge judging means in said at least two stations for calculating a time difference between said surge arrival times determined by said surge judging means in respective stations; andlocating means for locating a point where the surge occurs based on said time difference.