Matrix containing the binary charging decisions of all charging poles for the remaining time steps. j ω Vector containing the binary charging decisions of all charging poles at the current time step. top s Vector containing the non-zero elements.

A method calculating the precipitation at the site of every transmission tower based on the precipitation estimation data is proposed. An inverse-distance weighting (IDW) method is modified for spatial interpolation of the precipitation data received from Central Weather Bureau. Accuracy and computational speed are both put into consideration in the design of the proposed approach because vast amount of transmission towers is required to process at a time.

Torrential rainfall or continuous rainfall for a certain period of time may wash out the foundation of transmission towers and cause tilt or collapse of towers. Special attentions are required for the towers locating at the feature regions such as high risk landslides, mediocre risk landslides, mudslides, dip slopes, and fault zones. The towers locating inside or in the neighborhood of these features regions in Geographic Information System are identified and given different alert limits of precipitation. Accuracy and computational speed are both put into consideration in the design of the proposed approach because vast amount of transmission towers is required to process at a time.