Radial Feeder In Power System

In this system different feeders radiate from a substation or a generating station and feed the distributors at one end.

Radial feeder in power system. Single line diagram of a typical radial distribution system is as shown in the figure below. The radial type of distribution system a simple form of which is shown in figure 2 is the most common. The main characteristic of a radial system is that power flow only in one direction i e. If a source of power is present at both ends it is said to be a networked line.

Protection of radial feeders. This requirement makes the protection of parallel feeders little bit more complex than simple non direction over current protection of line as in the case of radial feeders. In case of transformer failure also the power supply is interrupted. The conventional simple radial system receives power at the utility supply voltage at a single substation and steps the voltage down to the utilization level.

As a protection engineer analyze the protection system and suggest the appropriate type of relays that can be used along with circuit breakers in case of close in fault of a long feeder. It is used extensively to serve the light and medium density load areas where the primary and secondary circuits are usually carried overhead on poles. A feeder line is a peripheral route or branch in a network which connects smaller or more remote nodes with a route or branch carrying heavier traffic the term is applicable to any system based on a hierarchical network. But radial electrical power distribution system has one major drawback that in case of any feeder failure the associated consumers would not get any power as there was no alternative path to feed the transformer.

Radial feeders are the simplest and least expensive both to construct and for their protection system. If fault occurs in any of the feeders only that faulty feeder should be isolated from the system in order to maintain continuity of supply from source to load. In electrical engineering a feeder line is a type of transmission line. The loss of the utility source transformer or the service or distribution equipment will result in a loss of service.

Thus the main characteristic of a radial distribution system is that the power flow is in only one direction. From the generator or the supply end to the load end. In a radial system when the number of feeders is connected. In telecommunications a feeder line branches from a main line or trunk line.

In other words the consumer in the radial electrical distribution system would be in darkness until the feeder. Q 1 there is a radial feeder available in the system as shown in the below figure which are used to supply power continuously to a load. In a power system a radial feed is one where a source is only present at one end of the transmission line. It has the drawback that continuity of supply cannot be controlled at the load end in the occurrence of a fault.