Substations are designed to accomplish the following functions, although not all substations have all these functions: Change voltage from one level to another. Regulate voltage to compensate for system voltage changes. Switch transmission and distribution circuits into and out of the grid system.
Most substations have very well manicured landscaping around them and a great place to grab a smiley.
Bring your own pen and put back where you found it.
CONGRATULATIONS to u2qt, me2 & rodwellerduo for FTF!