Detection method for rapidly positioning local discharge of GIS (geographic information system) by using ultrasonic testing technology

Abstract

The invention relates to a detection method for rapidly positioning local discharge of a GIS (geographic information system) by using an ultrasonic testing technology. The detection method comprises the following steps: (1) respectively providing an ultrasonic probe in each air chamber in an interval of a power GIS; (2) carrying out synchronous data collection on each ultrasonic probe; (3) analyzing and comparing the data collected by each ultrasonic probe; (4) gradually detecting each air chamber in other intervals of the power GIS according to the order from the step (1) to the step (3). By adopting the detection method, local discharge of the GIS is subjected to ultrasonic local discharge detection by a multi-channel GIS using a zigBee wireless sensor network transmission technology and a GPS (global position system) synchronous collecting technology; the ultrasonic probes are respectively arranged inside each independent air chamber; a collecting command is transmitted by a host computer of a control display part; each probe synchronously collects the data through the GPS, so that the test efficiency of ultrasonic detection on local discharge inside the GIS is improved; the functions of rapidly detecting and positioning local discharge inside the GIS are achieved; the detection time is shortened; the problem that a plurality of interval equipments are detected within limited time in a commissioning test of the GIS is overcome.

Description

technical field [0001] The invention belongs to the field of electromechanical equipment detection, in particular to a detection method for quickly locating GIS partial discharge by using ultrasonic detection technology. Background technique [0002] Each interval of the power GIS is divided into several independent SF 6 The air chamber, that is, the air separation unit and the independent air chambers communicate with each other on the circuit, but are isolated from each other on the air circuit. The air separation can separate different SF 6 The electrical components of the gas pressure are separated, and a separate air barrier can be set up for the electrical components with special requirements, which can not only reduce the scope of power failure and reduce the SF during inspection. 6 The workload of gas recovery and inflation and deflation is reduced, and it is also convenient for future installation and expansion of equipment. But this brings inconvenience to GIS pa...

AI Technical Summary

Problems solved by technology

But this brings inconvenience to GIS partial discharge detection. At present, ultrasound is a very effective means to detect GIS partial discharge. It can detect moving particles in GIS and acoustic signals emitted by partial discharge. Identify and locate by finding the location of the highest signal level

Due to the large number of GIS intervals in the station, there are multiple air chambers in each interval, and the higher the voltage level, the larger the GIS volume, which brings many difficulties to the test. Especially in the handover test, there is a certain limit on the pressurization time of the equipment. Need to improve test speed

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