Woodward DSLC-2 - Var Control Operation; Var Sharing Functionality

Manual 37443A DSLC-2 - Digital Synchronizer and Load Control
Page 170/226 © Woodward
Var control
The var control is active in
• Base load control
• Process control
• With an active MSLC-2 control
Adjustments when in var control
• PID var control
o VAR control proportional gain (parameter 5613)
o VAR control integral gain (parameter 5614)
o VAR control derivative ratio (parameter 5615)
The var reference can be changed
• Using ToolKit
• Voltage raise and lower discrete inputs
• Modbus address
Var sharing
The var sharing is active when
• PF or var control is selected
• Load sharing mode is active
Adjustments for var sharing mode
• Var loadshare
o VAR load share gain (parameter 4543)
o VAR load share factor (parameter 4547)
Voltage trim
The voltage trim is active
• Isochronous / load sharing mode
• Controls at Voltage control setpoint (parameter 5600)
Adjustments for the voltage trim feature
• PID voltage trimmer
o Voltage trim proportional gain (parameter 5610)
o Voltage trim integral gain (parameter 5611)
o Voltage trim derivative ratio (parameter 5612)
MSLC-2 is providing PF reference or controlling var or PF across the utility breaker
Adjustments when in PF or var control mode
• PID var control
o VAR control proportional gain (parameter 5613)
o VAR control integral gain (parameter 5614)
o VAR control derivative ratio (parameter 5615)
NOTE
If cross-current compensation is installed on the voltage regulator, it must be removed prior to using
the var/PF mode of control or instabilities may result. The droop CTs must remain connected to their
voltage regulator.