Woodward 9907-135 GS3/LQ Driver Module | Dual-Fuel Turbine Control

Woodward 9907-135 GS3/LQ Driver Module for Dual-Fuel Turbine Systems

The Woodward 9907-135 GS3/LQ Driver Module provides precision fuel delivery control for dual-fuel gas turbine applications, seamlessly managing both gas (GS3) and liquid (LQ) fuel systems. This advanced driver module ensures optimal combustion efficiency, emissions compliance, and reliable operation across varying load conditions in power generation and industrial turbine installations.

Technical Specifications

• Part Number: 9907-135
• Manufacturer: Woodward Governor Company
• Application: Dual-fuel turbine control (gas & liquid fuel)
• Compatible Valves: GS3 gas valve, LQ6 liquid fuel valve
• Control Interface: Analog/digital hybrid control signals
• Input Voltage: 24 VDC nominal (18-32 VDC range)
• Output Signals: Proportional current drive for valve actuators
• Operating Temperature: -40°C to +85°C
• Protection Rating: IP54 (with proper enclosure)
• Mounting: Panel or DIN rail compatible
• Certifications: CE, UL, CSA, ATEX Zone 2 compliant
• Dimensions: 180 x 120 x 65 mm
• Weight: 0.9 kg

Core Features & Advantages

• Dual-fuel capability enables automatic fuel switching during operation
• Precision valve positioning with closed-loop feedback control
• Integrated diagnostics with fault detection and alarm outputs
• Smooth fuel transfer logic minimizes combustion disruptions
• Field-configurable parameters for diverse turbine platforms
• Redundant safety circuits ensure fail-safe operation
• Low electromagnetic interference (EMI) design for harsh industrial environments

Application Scenarios

The 9907-135 driver module excels in:

• Combined-Cycle Power Plants: Coordinate gas and liquid fuel delivery during startup, load transitions, and fuel switching events
• Peaking Power Stations: Rapid fuel mode changes to optimize cost and availability during peak demand periods
• Oil & Gas Facilities: Drive compression turbines with flexible fuel options based on process gas availability
• Industrial Cogeneration: Manage dual-fuel turbines in manufacturing plants requiring both power and thermal energy
• Emergency Backup Systems: Automatic switchover to liquid fuel when gas supply is interrupted

System Integration Solutions

The 9907-135 integrates seamlessly with Woodward control ecosystems including 505 digital governors, MicroNet distributed control platforms, and legacy 2301 series controllers. It accepts standard 4-20 mA fuel demand signals and provides real-time valve position feedback for closed-loop turbine control. The module's modular architecture supports hot-swappable replacement without system shutdown, reducing maintenance downtime.

Frequently Asked Questions

Q: Can the 9907-135 control both fuel types simultaneously?
A: No, the module manages sequential fuel delivery—either gas or liquid at any given time—with controlled transition logic to prevent combustion instability.

Q: What is the typical fuel switching time?
A: Fuel transfer typically completes within 2-5 seconds depending on turbine configuration and control system tuning.

Q: Is this module compatible with third-party turbine controls?
A: Yes, the 9907-135 accepts industry-standard analog control signals and can interface with most turbine control systems via appropriate signal conditioning.

Q: Does the module require external power supplies?
A: The module operates from a 24 VDC supply; valve actuator power may require separate circuits depending on valve specifications.

Q: What maintenance is required?
A: Routine inspection of electrical connections and periodic calibration verification; no consumable parts require replacement under normal operation.

Warranty & Technical Support

All Woodward 9907-135 modules are backed by a comprehensive 12-month manufacturer warranty covering defects in materials and workmanship. Our technical support team provides installation assistance, configuration guidance, and troubleshooting support throughout the product lifecycle.

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