Power & Distributing Systems

The part of the power system that distributes electric power for local use is called as distribution system. Generally, a distribution system is the electrical system between the substation fed by transmission system and the consumer’s meters. A typical distribution system is shown in the figure.

Electrical power is dominant as it is relatively much easier to transmit and distribute than other forms of energy such as mechanical. Imagine transmitting mechanical energy to just 20 feet of distance. Isn't it much easier to use wires instead of belts, chains or shafts? We have seen how electrical energy is generated in generating stations and how it is transmitted over long distances through transmission networks. Now, let's see how electrical power is distributed to the consumers.

Power Distribution System

A distribution substation is located near or inside city/town/village/industrial area. It receives power from a transmission network. The high voltage from the transmission line is then stepped down by a step-down transformer to the primary distribution level voltage. Primary distribution voltage is usually 11 kV, but can range between 2.4 kV to 33 kV depending upon region or consumer.

Classification Of Power Distribution Systems