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Tuesday, November 18, 2008

POWER RESTRUCTING SYSTEM (ISLANDING SYSTEM FOR POWER PLANTS)

POWER RESTRUCTING SYSTEM (ISLANDING SYSTEM FOR POWER PLANTS)

ABSTRACT

In India internal Grid system is used, which is more useful for the continuation of the electric supply. Grid islanding scheme is a set of protective relays, connected at the incomer bus-these relays will sense a disturbance in the grid and give a trip command to the incomer breaker whenever the grid disturbance exceeds a set limit. By opening the incomer breaker, the plant is isolated from the grid. When the frequency begins to decrease (due to peak loads or heavy faults) the network is split into definite sections at predetermined points by frequency relays. The difference between output and load is reduced in every section by load shedding or load equalization in every island.

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