Woodward 8200-1302 Digital Governor

Woodward 8200-1302 Working Principle

It receives signals from sensors, such as speed and load information, compares them with preset target values, generates corresponding control signals through internal control algorithms based on deviation values, and drives the actuator to adjust the steam inlet volume or other relevant parameters of the steam turbine. This achieves precise control over the speed and load of the steam turbine, ensuring stable operation under different working conditions.

Product Features

• Advanced Interface: Equipped with an HMI screen featuring a high-level integrated multilingual interface for convenient operation.

• Reliable Platform: Based on the globally trusted 505 platform, ensuring reliable performance.

• Excellent Anti-Interference: Complies with EMC immunity standard EN 61000-6-2, enabling stable operation in electromagnetic interference environments.

• Multiple Protection Characteristics: Features an IACS UR E10-type housing (commercial marine), with ATEX, IP-54, and pollution degree 3 protection characteristics.

• Wide Temperature Range: Operating temperature range: -30 to 70 °C; storage temperature range: -30 to 70 °C, suitable for various environments.

• Clear Display: Equipped with an 8.4-inch LCD monitor for intuitive display.

• Convenient Operation: Includes a navigation crosskey, softkey commands, and four LEDs for easy association with control and hardware status.

Technical Parameters

• Power Supply: Typically DC power, with specific voltage requirements varying by model.

• Input Signals: Supports analog input 4-20 mA channels (with loop power) to receive sensor signals.

• Output Signals: Provides control signals to drive actuators, such as 4-20 mA signals or relay outputs.

• Communication Interfaces: May include communication interfaces like Modbus for data transmission and remote control with other devices.

Common Faults and Solutions

Communication Faults

• Phenomenon: Communication with the host computer or other devices is interrupted, unable to transmit data or receive commands.

• Causes: Damaged communication interface, poor communication cable connection, incorrect communication protocol settings, electromagnetic interference, etc.

• Solutions:

• Check the communication interface and cables to ensure they are firmly connected and undamaged.

• Verify the communication protocol parameter settings to ensure consistency with other devices.

• Take anti-interference measures, such as using shielded cables and reasonable wiring.

Reduced Control Accuracy

• Phenomenon: Unstable control of steam turbine speed or load, with large deviations or fluctuations.

• Causes: Sensor failure, unreasonable PID parameter settings, actuator jamming or failure, oil quality issues, etc.

• Solutions:

• Check the working status of sensors and replace them promptly if damaged.

• Readjust PID parameters to optimize control performance.

• Inspect the actuator, clean or repair jammed components, and replace them if faulty.

• Check the oil quality and filter or replace the oil if necessary.

Abnormal Display

• Phenomenon: The HMI screen shows blackout, garbled display, incomplete display, or error messages.

• Causes: Damaged screen, faulty display drive circuit, controller software issues, etc.

• Solutions:

• Check if the screen connection is normal and reconnect it if loose.

• Replace the screen if it is damaged.

• Inspect the display drive circuit and repair or replace it if faulty.

• Update the controller software to fix possible software issues.

False Activation of Protection Devices

• Phenomenon: Under normal operating conditions, the protection device is accidentally triggered, causing the steam turbine to stop or restrict operation.

• Causes: Improper protection parameter settings, false sensor alarms, external interference, etc.

• Solutions:

• Check the protection parameter settings to ensure they meet actual operating requirements.

• Verify the reliability of sensors to eliminate the possibility of false alarms.

• Strengthen anti-interference measures to prevent external interference from affecting the normal operation of protection devices.