Limited by the time intervals of passing territory of polar orbit satellites

it is impossible to monitor wildfire occurrences in power transmission line corridors uninterruptedly by using polar orbit satellites. In this paper

an alarming technique based on Himawari-8 geostationary meteorological satellite is proposed to monitor wildfire occurrences in power transmission lines corridors. In order to ensure the accuracy and universality of the recognition algorithm

an adaptive dynamic method

which considers the influences of the solar elevation angle

the non-vegetation pixel

and the cloud pixel

is proposed to determine the bright temperature thresholds of different regions. In addition

the information of power transmission lines as well as their fire-risk levels are pre-stored in grids to improve the efficiency of fire-point alarming system. Once a monitored wildfire locates in these girds

the information of the power tower and its fire-risk level are then output to the local maintenance staffs. This wildfire alarming technique has been applied in a provincial power grid in the southern of China. It realizes 24 h uninterrupted monitoring and alarm of wildfire occurrences in power transmission line corridors. And all the wildfires occurrences have been disposed to avoid wildfire induced transmission-line trip failures during the Tomb-Sweeping Days in 2017—2019.