FAULT POINT LOCATING APPARATUS AND FAULT POINT LOCATING METHOD

• Main Authors: NISHIDA CHIEKO, IKURA NOBUKI
• Format: Patent
• Language: English
• Published: 01.12.2011
• Subjects: BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLYOR DISTRIBUTION OF ELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a fault point locating apparatus and fault point locating method capable of determining whether an incident is a trouble in a gas zone or a trouble in a system based only on a pressure signal from a gas pressure sensor.SOLUTION: A fault point locating apparatus locates the fault point of a flashover accident occurring in a gas insulated switchgear 10 which has an energized conductor 4 disposed in a metal container 1 thereof and is filled with an insulating gas 5. The fault point locating apparatus comprises gas pressure sensors 11 installed one in each of plural gas zones delimited within the metal container 1 and a signal processing unit 15 which includes a gas pressure measuring unit 13 which measures the pressure within each gas zone based on gas pressure signals 16 from the gas pressure sensors 11 and a determination processing unit 14 which, when a pressure rise value of the pressure measured by the gas pressure measuring unit 13 is larger than a designated set value, determines that a flashover accident has occurred in the gas zone in which the pressure signal was detected.