Which of the following statements is true about selection of the size of units in electrical energy generation?

Question

Question

This question was previously asked in

SSC JE Electrical 9 Oct 2023 Shift 3 Official Paper-I

The size should be selected such that the unit operates close to the load curve of the station.
The size must be selected such that the unit operates close to the maximum demand curve of the station.
The size should be selected independent of both the maximum demand curve and the load curve.
The size of units must match both the maximum demand curve and the load curve.

Answer 1

The correct answer is option 1.

Criteria for selection of the size of units in electrical energy generation

The number and sizes of the units should be selected to meet the annual load curve of the station.
The size should be selected such that the unit operates close to the load curve of the station.
The units should be preferably of different capacities to meet the load requirements.
The capacity of the plant should be made 15% to 20% more than the maximum demand to meet the future load requirements and fault currents.
There should be a spare generating when the repairs units are carried out.
The selection of multi-units of smaller capacity to fit the load curve very accurately should be avoided. (because the investment cost per kW of capacity increases as the size of the units decreases).