2301A Electronic Load Sharing and Speed Controls

The 9907 series of the Woodward 2301A controls load sharing and speed of
generators driven by diesel or gasoline engines, or steam or gas turbines. These
power sources are referred to as “prime movers” throughout this manual.
The control is housed in a sheet-metal chassis and consists of a single printed
circuit board. All potentiometers are accessible from the front of the chassis.
The 2301 A provides control in either isochronous or droop mode.
The isochronous mode is used for constant prime mover speed with:
 Single prime mover operation or
 Two or more prime movers controlled by Woodward load sharing control
systems on an isolated bus
 Base loading against an infinite bus with the load controlled by an Automatic
Power Transfer and Load (APTL) Control, an Import/Export Control, a
Generator Loading Control, a Process Control, or another load-controlling
accessory.
The droop mode is used for speed control as a function of load with:
 Single prime mover operation on an infinite bus or
 Parallel operation of two or more prime movers
The 2301 A system for a single prime mover generator includes:
 A 2301A electronic control,
 An external 18 to 40 Vdc (low voltage range); or 90 to 150 Vdc or 88 to 132
Vac (high voltage range) power source,
 A speed-sensing device,
 A proportional actuator to position the fuel- or steam-metering device, and
 Current and potential transformers for measuring the load carried by the
generator.