WOODWARD 9907-164 505 Digital Turbine Governor Controller

WOODWARD 9907-164 belongs to the famous 505 series digital governor, a microprocessor-based controller specially designed for single or split-range actuator steam turbines. It realizes precise speed and load regulation to maintain stable operation of steam turbine generator sets.

This unit integrates built-in operator panel, LCD display and key set, with rich analog and digital I/O terminals. It supports critical speed avoidance, cascade control and load sharing functions, and has overspeed protection logic. As aftermarket spare parts, it is widely used for maintenance, replacement and retrofit of power plant steam turbine control systems.

Main Specifications

1. Brand: WOODWARD; Model: 9907-164; Type: 505 Digital Turbine Governor Controller
2. Compatible System: Steam turbine with single / split-range actuator, turbine generator set, power plant control system
3. Core Functions: Turbine speed control, load control, critical speed avoidance, overspeed protection, cascade and load sharing control, fault diagnosis
4. Port Resource: Magnetic pickup speed input, analog 4-20mA I/O, relay output terminals, front LCD and keypad, communication interface
5. Supported Feature: Panel mounting, IP56 front panel, 2-line 24-character LCD, configurable I/O, wide operating temperature, industrial EMC protection
6. Hardware Feature: Panel-mounted turbine governor unit, integrated display & keypad, passive cooling
7. Supply Status: Aftermarket spare part for steam turbine governor control system maintenance and component replacement

Core Functions

1. Collect shaft speed signal from magnetic pickup sensor, automatically adjust actuator output to stabilize turbine rotating speed under variable load conditions.
2. Realize load control and load sharing between multiple turbine units, meet the power grid load dispatch requirements of generator sets.
3. Critical speed avoidance function prevents the turbine from staying at dangerous resonance speed, protecting turbine rotor and mechanical equipment.
4. Built-in overspeed monitoring and protection logic, will trigger relay trip output once exceeding preset speed threshold to shut down the turbine safely.
5. Front panel LCD and keypad support local parameter configuration, real-time data viewing and fault code query for convenient on-site commissioning.
6. Rich analog and digital I/O can connect field transmitters, actuators and DCS system to realize cascade control and remote operation.

Application Scenarios

1. Turbine speed & load control unit for steam turbine generator sets used in thermal power, cogeneration and industrial power plant industries.
2. Fault governor replacement and routine maintenance of existing 505 series steam turbine control cabinets.
3. Turbine control hardware upgrading and technical transformation for aging legacy steam turbine governing systems.
4. Emergency swap for controller failure of steam turbine units requiring stable speed regulation and overspeed safety protection.
5. Spare-parts stocking for power plant control and instrument maintenance teams supporting Woodward 505 governor series products.
6. Aftermarket spare supply for steam turbine control cabinet overhaul and technical-service projects of power generation facilities.

FAQ

1. Q: Can WOODWARD 9907-164 work independently without magnetic speed pickup and turbine actuator?
   A: It needs to match magnetic pickup sensor and turbine actuator, cannot run as standalone hardware.
2. Q: What are typical controller failure symptoms?
   A: No speed reading, unstable speed fluctuation, actuator no response, overspeed alarm fault code displayed on screen.
3. Q: How to complete commissioning and diagnosis?
   A: Check power supply, magnetic pickup wiring and actuator connection; set governor parameters via front keypad and test overspeed protection function.