The invention belongs to the technical field of
sulfur hexafluoride leakage detection, and relates to a biological detection method for
sulfur hexafluoride leakage based on odorous dogs and GIS space positioning. Comprising the following steps: step 1, selecting dogs and performing special training; selecting dogs with high olfactory sensitivity, taking SF6 gas or equipment operation gas as a target smell source, establishing
conditioned reflex through smell-reward training, and inhibiting interference on oil smell and dust; step 2, preparation before
field detection; a ventilation
system is closed to stabilize the smell, an anti-puncture sheath is arranged for the dog, and a
tractor wears high-
voltage protective clothing to ensure that the equipment is grounded; step 3, grading detection and accurate positioning; a dog census GIS equipment in a zigzag path, marks a suspicious area through warning, then sniffs key points such as a
flange and an insulator in a
close range, and remeasures and confirms a leakage point in combination with a portable
leak detector. According to the invention, by using the advantages of sensitive smell and strong maneuverability of the odorous dog, the SF6 gas leakage of the GIS / GIL equipment can be quickly, efficiently and accurately positioned.