Shunt Reactor Bank calculations

[anteg]

I am trying to calculate the size of inductors for a three phase shunt reactor bank to provide 3MVAR at 33kV.

Calculations
XL=(kV^2)/MVAR = 33^2/3 = 363 ohms

L= XL/(2piF)= 363/376.99 = 0.962 Henries

Is this value correct, if so will the bank require an indcutor of 0.962 henries per phase?
This is where I get a little confused. Will three 0.962 Henry reactors (one per phase) form a 0.962 reactor bank?

I know that with capacitor banks a 600 kVar bank is formed of 3- 200kVar units. 200 kVar per phase.

 

[anteg]

I just realized my last question does not make much sense..
what I meant to ask was if three inductors of 0.9 henries (one per phase) will give me a 3MVAR bank at 33kV? based on shown calculations.

Thanks

 

[rbulsara]

Hint: You need to use per phase voltage and per phase MVAR to calculate per phase XL

Rafiq Bulsara

http://www.srengineersct.com

 

[magoo2]

anteg,

What you've done is correct. You can use either
3-phase MVA and kV ph-ph

or

1-phase MVA and kV ph-n

Both will give you the same result.

 

[rbulsara]

Agreed. Using single phase values will remove his confusion, though.

Rafiq Bulsara

http://www.srengineersct.com

 

[wareagle]

Why do you think you need reactors? I have installed caps on a 34.5 kv line and used fused cutouts.

 

[scottf]

I think it's good for you to understand the calculations.

However, you can simply tell your reactor supplier the voltage and MVAr you need and they'll take it from there.

 

[anteg]

Scottf,

It is true that I can just let someone else handle this, but I would like to understand what needs to be done before we move forward with a project.