Radial Feeder In Power System

Protection of radial feeders.

Radial feeder in power system.

The radial type of distribution system a simple form of which is shown in figure 2 is the most common. In telecommunications a feeder line branches from a main line or trunk line. In this system different feeders radiate from a substation or a generating station and feed the distributors at one end. In a radial system when the number of feeders is connected.

This advantage however is offset by the difficulty of maintaining supply in the event of a fault occurring in the feeder. If the loss of a transformer or feeder can t result in the loss. In a power system a radial feed is one where a source is only present at one end of the transmission line. 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.

Thus the main characteristic of a radial distribution system is that the power flow is in only one direction. Radial feeders are the simplest and least expensive both to construct and for their protection system. The main characteristic of a radial system is that power flow only in one direction i e. In case of transformer failure also the power supply is interrupted.

If a source of power is present at both ends it is said to be a networked line. From the generator or the supply end to the load end. 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. 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.

Many distribution systems operate using a radial feeder system a typical radial feeder system is shown schematically in figure 2. 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. It has the drawback that continuity of supply cannot be controlled at the load end in the occurrence of a fault. 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.

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. 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 electrical engineering a feeder line is a type of transmission line. Single line diagram of a typical radial distribution system is as shown in the figure below.