SF6 gas density relay failure monitoring method and device and storage medium

The invention discloses an SF6 gas density relay failure monitoring method and device and a storage medium, belongs to the technical field of electrical equipment insulating gas detection, solves the problem of how to efficiently monitor faults and drifting of an SF6 gas density relay, and adopts a Beattie-Bridgman state empirical equation to derive linear increase of pressure along with temperature increase under the condition of equal density; a temperature-pressure curve is drawn, a correlation coefficient is calculated, and whether a fault occurs or not is judged according to the correlation coefficient; calculating a theoretical value of the saturated vapor pressure by adopting a calculation formula of the saturated vapor pressure, measuring the actual saturated vapor pressure in the gas cavity at the temperature, and judging whether drift occurs or not according to the deviation between the theoretical value and the actual value; fault diagnosis once a week and drift diagnosis once a month can be carrie