Induction Generator Reduced Voltage Starting

[3winding]

The local utility will not accept the voltage sag produced by a small (750kW) induction generator being connected to their system. The generator breaker is closed after the unit is rotated to synchronous speed by the prime mover. The current inrush is therefore primarily composed of VARS to establish the magnetic field. One option as a method of mitigating this problem is using reduced voltage starting to limit the inrush and resulting voltage sag. The question is how to size the transformer and what configuration/transition of a bypass contactor should be used. Of course economics is an issue, so the smallest possible size transformer is the goal. Does anyone have any good references on this subject?

 

[jraef]

If you are looking for a solid state system, try

http://www.enerpro.com

That is their specialty niche.

"Venditori de oleum-vipera non vigere excordis populi"

 

[jbartos]

Suggestion: Visit

http://www.thomasregister.com

and type Starters: Reduced Voltage under Product or Service, which will return 13 companies to approach to
or
type Controls: Motor, Soft Start under Product of Service, which will return 71 companies to approach to

 

[jraef]

Oops, sorry, incomplete link info.

http://www.enerpro-inc.com/

And by the way, any solid state starter will work to accelerate the induction enerator to speed as a motor, but the reverse power flow at over-synchronous becomes problematic. Enerpro has been doing it from the get-go.

"Venditori de oleum-vipera non vigere excordis populi"