Recent content by 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.

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

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...

I am attempting to understand the power flow in a shunt capacitor. I understand that basic concept in regards to a capacitor but I would like to understand its behavior with an AC, 60hz source. Does the capacitor charge and discharge 60 times per second as the AC oscillates from positive to...

Scottf, Thank you. I will follow your advice and give them a call.

Scottf, I looked into the AREVA website and it gave me the impression that they were mainly into large reactors for substation applications. Do they have smaller reactors (2000kVar-4000kVar) for Overhead and/or Padmount application on distribution circuits at 33kV? Thank you

dpc, Thank you for the link. I will contact the company on Monday and find out if they have experience in the type of application we are looking for.

redfurry, I am no expert on voltage regulators but my understanding is that the units that we use are unreliable and have not performed as desired plus these are believed to be small thermally to address some issues and may not fix voltage profile as effective as a reactor would. Regulators...

Does anyone know of a Distribution Switched Shunt Reactor application at 33kV? I did search the forum and found a thread from two years ago with this question but no answer was determined. The problem comes from new 33kV generator projects requesting interconnection. These would cause...

jghrist, Capacitance constant? but what if this capacitance is shunted to a line where the voltage drops by 1/2? I don't believe the available KVar would be constant if its line voltage is dropped by 1/2?... Also, I had seen this formula you mention. Is this one more accurate than MVAR/MVA...

Can you refer to any link where the process or calculations to obtain a closer estimate is discussed. I have tried looking everywhere but have not found anything useful.

When you put it this way it makes sense. So my MVAsc goes down by a factor of 4 if my voltage goes down by 1/2. Same applies to the capacitors, they go down by 1/4 when the voltage goes down by 1/2. Therefore my ratio for my voltage rise = MVAR/MVA does not change with voltage, correct...

I was told that the kvars on a capacitor bank decay by a square of the line voltage. ex. if the voltage feeding the capacitors drops by 1/2, then the capacitors are only capable of delivering 1/4 of their rated capacitance, is this true? is there a formula for this? I am trying to determine...