Woodward 9907-018 Load Sharing and Speed Control

Woodward 9907-018 Load Sharing and Speed Control

Description

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
• 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. 

Applications

The 2301A 9905/9907 series electronic controls have switch-selectable speed ranges. Any of these control models can be set to operate within one of the following rated speed ranges:

• 500 to 1500 Hz
• 1000 to 3000 Hz
• 2000 to 6000 Hz
• 4000 to 12 000 Hz

Technical Specifications