Power Upgradation Facility

We are going to upgrade the Power facility. Your Valuable suggestions are to be required

System Description:

1. Grid -A (Main Grid): Supply 132 KV to Grid -B through Over head Power Line

2. Grid-B: Step Down 132 KV to 11 KV. This Step down Station has a 26/20 MVA, 132/11 KV Transformer

3. Factory: Takes 11 KV from Grid-B

4. Power Plant: A Power plant having a Capacity of 25 MW is going to be installed to feed Power to the Factory & to add remaining Power to the Main Grid (In order to sell the Power) Grid-A.

This Power Plant will be Connected with Grid-B, so that the Factory utilizes the Power (as required) of the Power Plant and remaining Power would be added to the Grid-A .

Note: Power Plant, Factory and Grid-B are Co-located with each other while Grid -A is 32 km away from them.

Factory has Power consumption of 17 MW for 16 Hours and then Power demand decreases to 6 MW for the remaining 8 Hours.

Which Configuration would be the most Suitable/flexible/Cost effective to Connect Power plant to Grid-B?

1. Connect the Power Plant with the Grid-B through 11 KV Line (Power Plant should generate 11 KV)?

2. Connect the Power Plant with the Grid-B through 132 KV independent Line (Step up the Power generated to 132 KV)?

If we use 132 KV Line configuration then is there any need of Separate overhead Line (From Grid -B to Grid -A)to send the power (8 MW for 16 Hours and 19MW for 8 Hours) from Power Plant to main Grid-A through Grid-B? What would be the additional equipments required Like Transformer etc

Thanks & Kind Regards

Aghvel Niazi