Description
Woodward 9907-167
Technical Specifications
- Controller Type: 505E Digital Turbine Controller.
- Application: Single extraction and/or admission steam turbines.
- Processing: High-speed microprocessor with real-time control loops.
- I/O Capacity: 16 discrete inputs, 6 analog inputs, multiple analog outputs.
- Communication: Modbus RTU, optional Ethernet.
- Power Supply: 24 VDC nominal.
- Operating Temperature: -40°C to +85°C.
- Protection Rating: IP67 (when properly installed).
Functional Features
- Extraction Control: Precise extraction pressure control with cross-limiting to inlet valve.
- Speed/Load Control: Isochronous or droop speed control with load limiting.
- Start-Up Sequencing: Programmable warm-up, roll, and acceleration sequences.
- Comprehensive Protection: Overspeed, low lube oil, vibration, and loss-of-signal protection.
- DCS Integration: Full bidirectional communication with plant DCS/PLC systems.
- Data Logging: Event and trend recording for operational analysis.
Application Scenarios
- Extraction Steam Turbines: Single-extraction turbines for process steam and power generation.
- Back-Pressure Turbines: Back-pressure turbines for cogeneration applications.
- Industrial Generators: Turbine-driven generators in industrial facilities.
- Mechanical Drive: Turbine-driven compressors and pumps with extraction.
Performance Parameters
- Speed Regulation: Isochronous ±0.1% or droop adjustable.
- Extraction Pressure Control: ±0.5% of span.
- Response Time: <50ms control loop execution.
- MTBF: >100,000 hours.
Material Composition
- Enclosure: Die-cast aluminum with powder coat finish.
- PCB: Multi-layer industrial-grade with conformal coating.
- Connectors: Gold-plated contacts for reliability.
Structural Characteristics
- Form Factor: Standard 505E panel-mount enclosure.
- Display: 2 x 24 character LCD with backlight.
- Keypad: Sealed membrane keypad with tactile feedback.
- Dimensions: 14″ W x 11″ H x 4″ D.
Working Principle
The 9907-167 continuously monitors turbine speed, load, and extraction pressure. It executes PID control algorithms to adjust inlet and extraction valve positions via electro-hydraulic converters. The controller manages start-up sequences, maintains operating setpoints, and continuously monitors for fault conditions, initiating protective trips when limits are exceeded.
Installation Requirements
- Panel Mounting: Install in clean, dry control panel with adequate ventilation.
- Wiring: Use shielded cables for all analog and speed sensor connections.
- Grounding: Establish dedicated equipment ground per NEC/IEC standards.
- Hydraulic Connections: Ensure clean, leak-free hydraulic connections to CPC converters.
Usage Precautions
- Parameter Backup: Always maintain backup of configuration parameters.
- Protection Testing: Test all protection functions before commissioning.
- Sensor Verification: Verify MPU gap and signal strength before operation.
- Maintenance Schedule: Follow recommended maintenance intervals for hydraulic system.
