Electrical energy is generated at power stations and transmitted through a network with two parts: transmission and distribution. The transmission system uses high voltage power lines supported by steel transmission towers ranging from 15-55 meters tall. There are different types of poles that can support power lines for the distribution system, including wooden poles, concrete poles, steel tubular poles, and steel towers, with factors like cost, strength, and maintenance considered for the appropriate selection. Safety protocols must be followed when working with transmission towers.