Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Generator kVAR Sharing

Status
Not open for further replies.

davehawks

Electrical
Joined
Nov 26, 2002
Messages
4
Location
US
I have an application that involves paralleling two sections of diesel generators. Here are the details:

"A" Section - 5 x 750 kW, 2.4kV, 60Hz

"B" Section - 5 x 500 kW, 480V, 60Hz

Each separate section utilizes the following load sharing:

Real Power - isochronous governor control with analog load sharing lines connected to Woodward 2301A controllers.

Reactive Power - reactive differential (cross-current) analog load sharing lines connected to Basler voltage regulators.

My specific question centers on reactive load sharing with paralleled units from both sections. Since the alternator voltage levels are different, I realize that the cross-current lines between the sections cannot be directly connected. I am assuming that some form of a VAR controller needs to be implemented that would control the signal on each separate cross-current loop.

Any recommendations and guidance would be greatly appreciated.
 
If the CT ratios are selected such that the secondary currents are all the same at full load, you shouldn't have a problem. All burden resistor should approximately match.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top