Induction Generators

Dear all,

I have a couple of questions on MV Induction Generator performance and operations

1. When the induction generator is introduced into the grid, will this result in a drop in PF of the generator due to the reactive excitation current drawn from the grid?
I think it should but how long will this last for?

2. Will varying of the loading (i.e Variance in P.F) from the GRID affect the PF of the generator?

3. Will Power Factor Correction (Without Switching) affect the Power Factor of the generator?
Also, must the capacitor banks be switched off after start up or is it meant to be kept ON at all times?

4. What will be the most common problem if the recorded PF of the generator from site differs from tested results?

5. Is there a vast difference in Power Factor if an induction generator is mechanically driven (i.e generating) and when tested base on loading Electrically? Should be the Same???

6. Any good books or papers to recommend on for 3 Phase Induction Generator usage or troubleshooting guide?

Currently, our issue is that the Power Factor reading of generator on Site differs by about 8-9% compared to testing done in the factory. There is no problem in the efficiency figures. Only problem is with the PF figures.
The loading and equipments both on site and factory has been checked and driven loading is correct.

Generator was tested to JEC standards with result figures base on circle diagram.

Has anyone encountered something similar?

Cheers
SCIM

Eddy Current Wrim Starter

Hi All,

Wonder if anyone has used such a method call a Eddy Current Starter to start a Wound Rotor Induction Motor and if it was a good or bad experience.

And also does anyone know when did this method come into the market?? I have only just got to hear of it and after briefly looking into it, there don't seems like alot of technology in it.
So it might have been out for decades which isn't popular??

MAGNASTART Brand or similar is what I am refering to and just like to hear some feedback on it.

Thanks
ScIM