Tohoku Electric Power Company, Inc.

Kyokuto Boeki Kaisha, Ltd.

Other

Masaaki Ozawa

Sakari Ohira

Toshiaki Kojima

Akira Terashima

Masatoshi Yamaki

A surge locating system and a method thereof which can accomplish the surge locating with high accuracy and with relatively simple structure. When the surge occurs, the voltage is generated on the neutral point of Y-connected three-phase alternating current transmission line because of losing a voltage balance on the three-phase alternating current transmission line. The surge locating can be accomplished by detecting the voltage generated in the neutral point. The neutral point is grounded, and the surge locating system according to the present invention is installed between the neutral point and the grounding point. The voltage generated in the neutral point is introduced into the surge locating system and the detecting time thereof is stored. This detecting time is stored in the respective stations, and the surge point can be located based on the detecting time difference between the stations.

Surge locating system of power transmission line and method thereof

There is disclosed a surge discriminating and locating system having at least one master station and at least one slave station. The system comprises surge receiving means for receiving surges which occur on a power transmission line, locating means for locating a point where the surge occurs, digitizing means for digitizing said surge into a digital signal, extraction means for extracting from said digital signal the characterized portions thereof as information representative of the surge waveform, memory means for storing predetermined reference information concerning the nature of surges, and discriminating means for comparing said information representative of the surge wave form with said reference information stored in said memory means to discriminate the kind of surge.

System for discriminating kinds of surges on power transmission lines

System for detecting defective point on power transmission line by

Growing community of inventors

Hoya, Japan

Masaaki Ozawa