Synchronous Motor as Reactive Power Source 1

[eaaf]

Hello.
I have a 3000 KW Synchronous Motor. Made by KATO. I replace this motor with a wound rotor motor. I'm thinking to install the synchronous motor as a Reactive Power Source, in order to improve the PF. The plant is a big consumer, almost a 42 MW, The incoming has two transformers and its feeders, seven in each one, one for each section. I'm thinking to install the motor after one of these feeders. We have the biggest induction motors downstream of one of the principal transformer.
Do you have any thoughts about it? I'll appreciate if any of you could give some ideas about to implement it or if you have some experience about the topic.
Regards.

 

[waross]

cunin;
Yes it works, but it is very expensive. In many plants, especially plants with a high diversity factor, the cost of individual correction versus bulk correction is several times. The greater the diversity factor, the greater the difference. For power factor correction there is no "One size fits all" solution. Utility penalties kick in at any where from 85% or 90% lagging to 99% leading or lagging in different countries. Calculation of power factor may be a dynamic summation in real time or a monthly reconciliation of KWHs and KVARHs. The monthly method allows a small corrrection to be online 24 hrs a day.
Your rule of thumb may be valid but be aware that it is the most expensive solution to power factor correction.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[cunin]

waross
You are absolutly right. I just put it out there to see what responce I would get. Reading the posts about near compacity tranf and starting generators. Didn't give me a warm comfortable feeling. I would have to know more about the plant system. I have a feeling that this is and old plant and have over sized motors. This is a very interesting field with PF, VFD, harmonics, solid state relays, gen controls.

 

[burnt2x]

Scotty,
Sorry, must be sleepy! You are correct!