The invention relates to a
circuit breaker contact temperature-rise detection method based on GIS casing
body temperature measurement. The method comprises the steps that 1) the ambient temperature,
internal pressure and load current of a GIS
circuit breaker under a working condition are acquired; 2) a three-dimensional space multi-
physics coupling model of contact heating in the GIS
circuit breaker is established to acquire the function relationship between the internal
contact temperature rise
delta T of the GIS circuit breaker under the current working condition and the maximum temperaturerise
delta Tw of a temperature rise sensitive area corresponding to the internal contact on the external surface of the casing body, wherein the function relationship is
delta T=f (I0, T0, P0, delta Tw), I0 is the load current, T0 is the ambient temperature and P0 is the
internal pressure; 3) the temperature rise distribution of the external surface of the GIS circuit breaker casing body under theworking condition is acquired, and the
maximum temperature rise of all temperature rise sensitive areas on the outer surface of the GIS casing body is recorded; and 4) the temperature rise of the internal contact of the GIS circuit breaker is calculated under the working condition is calculated based on the function relationship. Compared with the prior art, the method provided by the invention has the advantages of high accuracy,
high security and the like.