METHOD AND APPARATUS FOR TROUBLE-LOCATION ON TRANSMISSION LINE OF CONCURRENT DOUBLE LINE

摘要

PURPOSE: A method and an apparatus for a trouble-location on a transmission line of a concurrent double line are provided to display correctly a trouble location without zero phase current of a neighboring line by using current data and voltage data. CONSTITUTION: An auxiliary voltage transformer(100) receives and converts a three-phase voltage from a main voltage transformer and transmits the converted voltage signal to the data collection portion(200). An auxiliary current transformer(120) receives and converts three-phase current from a main current transformer and transmits the converted current signal to the data collection portion(200). A signal handling portion(220) of the data collection portion(200) handles the voltage and current signals and transmits them to a low pass filter(240) of the data collection portion(200). The low pass filter(240) removes a radio frequency from the received signals. An A/D converter(260) of the data collection portion(200) converts the voltage and the current signals to digital signals. A data storage portion(280) stores the current and the voltage signals received from the A/D converter(260). A main control portion(300) checks a trouble of a transmission line by using digital voltage and current data. An input/output portion(400) receives trouble information and transmits it to the main control portion(300). A memory portion(600) stores trouble information data and trouble distance data. A correction/display portion(500) corrects trouble information and displays the trouble information data and the trouble distance data.