With the advent of modern microprocessor relaying, much of the communication between relays has been shifting from power-line-carrier apparatus or microwave to fiber. Since power utilities own the easements for the high voltage transmission lines, it is only logical to install fiber up there. One ingenious location is the lightning shield wire. It is the …
Power substations contain transformers, breakers, switches, and plenty other critical pieces. This category explains the equipment design in detail.
delta-star or star-delta transformers : Useful at generation and load centers.
star-star-delta transformers : Useful at transmission substations (765kV, 500kV, 345kV, 115kV).
Grounding the neutral provides higher ground fault currents however the cost savings realized by lower insulation requirements makes grounding viable.