Online monitoring is an important means to guarantee the safe operation and implement risk control and intelligent operation inspection in large power grid. Unlike substation equipment

the outstanding function of transmission equipment lies in these plateau areas with remote traffic

complex geographic conditions

difficult operation and maintenance management. The adaptability problems of insufficient power supply and long endurance time of monitoring devices are prominent and its operation status highly depends on the environmental and meteorological conditions through which transmission lines pass

so the selection of environmental meteorological judgment is particularly important. The key environmental meteorological factors affecting power supply selection for online monitoring of transmission equipment in plateau area are proposed

and clustering algorithm is used to realize environmental meteorological classification in plateau area. Four typical meteorological regions affecting power supply selection of online monitoring devices for transmission lines in plateau area are obtained. Furthermore

some suggestions on the universality of power supply mode selection of online monitoring devices for transmission lines in each typical meteorological region are proposed

which can provide a reference for power supply selection for online monitoring construction and transformation of transmission lines in those areas.