Woodward 9903-470 AGLC Automatic Generator Loading Control Module

The Woodward 9903-470 is an AGLC automatic generator loading control unit, designed for generator sets parallel to the utility grid. It realizes smooth load transfer, soft loading and unloading to avoid power impact when generators connect or disconnect from the grid, ensuring stable operation of distributed power systems.

This controller supports adjustable loading ramp rate and bumpless power exchange, compatible with Woodward 2301A and other speed governors. It adopts robust metal panel mounting housing with complete internal logic interlock, widely used for generator station upgrade, commissioning and spare parts replacement.

Main Specifications

• Brand: Woodward
• Model: 9903-470 AGLC Automatic Generator Loading Control
• Function: Generator soft load in & soft load out parallel control
• Power Supply: 18 VDC ~ 40 VDC operating voltage
• Ramp Control: Adjustable loading / unloading ramp time parameter
• Compatibility: Matches 2301A series speed and load sharing governors
• Control Mode: Bumpless power transfer between genset and mains
• Maximum Quantity: Supports up to 15 generator sets on the grid bus
• Operating Temperature: -40°C ~ +70°C
• Installation: Standard industrial panel mounting structure

Core Functions

• Implement soft loading when generator synchronizes and closes onto utility grid
• Execute gradual load shedding before generator breaker opening for grid separation
• Realize bumpless power transfer without voltage and frequency fluctuation impact
• Provide adjustable ramp speed to match different generator prime mover characteristics
• Base load control function to maintain fixed power output for grid-connected units
• Seamless coordination with load sharing governor for multi-generator parallel operation
• Built-in logic interlock to prevent improper loading sequence operation
• External contact signal interface for remote enable and function activation
• Continuous monitoring of operating status and abnormal condition protection logic
• Long-term stable continuous operation for industrial and power station generators

Application Scenarios

• Cogeneration power plant gas/diesel generator grid connection control systems
• Industrial park multi-generator sets parallel grid-connected power supply projects
• Oil & gas field distributed power generation equipment control cabinets
• Waste heat generator set soft load switching control devices
• Mine remote power station generator grid parallel supervision systems
• Commercial complex backup generator grid connection control equipment
• Marine vessel auxiliary generator shore power switching control
• Microgrid generator and mains power smooth switching solutions
• Woodward governor matching control system renovation and maintenance
• Legacy generator parallel control cabinet spare parts replacement projects