Interconnected System: Advantages of 2 or more Generating Station

Upper Trishiuli 3A Hydroelectric Project

What do you understand by the term “Interconnected System” ? Discuss the Advantages of interconnection of two  or more Generating Station.
Parallel Connection of several generating station is know as interconnected system.

Here are the Advantages of Interconnected System
  1. Exchange of Peak Loads:

If the curve of a power station shows a peak demand that is greater than the rated capacity of the plant, then the excess load can be shared by other stations interconnected with it.

2. Use of Older plants:

The interconnected system makes it possible to use the older and less efficient plants to carry peak loads of short duration.

3. Ensures economical operations:
The interconnected system makes the operation of concerned power station quite economical . It is because sharing of load among the station is arranged in such a way that more efficient stations work continue through out the years at a high load factor and the less efficient plants work for peak load hours only.

4. Increase diversity factors:

The load curves of different interconnected stations are generally different. The result is that the maximum demand on the system is much reduced as compared to the sum of individual maximum demand on different station. that is the diversity factor of the system is improved there by increasing the effective capacity of system.

5. Reduced Plant Reserve Capacity:

Every power station is required to have a stand by unit for emergency. However, when several power station are connected in parallel the reserve capacity of the system is much reduced. This increase the efficiency of the system.
6. Increase reliability of supply:

The interconnected system increases the reliability of supply. If a major break down occurs in one station continuity of supply can be maintained by other healthy station.

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