9904-206 Woodward turbine controller

Price:

Product basic information
Manufacturer: Woodward
Model: 9904-206
Belonging to the famous 505 series
Supports multiple communication protocols and can be smoothly integrated with the existing control system of the factory
Core application: Designed specifically for speed control and protection of steam turbines
9904-206 controller has stable performance and high reliability

Categories: WOODWARD
Tags: - Actuator 9904-206 controller debugger module Motor touch screen WOODWARD

9904-206 Woodward turbine controller

The 9904-206 is a microprocessor-based digital governor controller produced by Woodward, belonging to its classic 505 series.
It is primarily designed for speed control and protection of steam turbines. Below is a detailed introduction to this product:

I. Product Overview

Brand and Model: Woodward 9904-206
Series: 505 Series Digital Governor
Type: Microprocessor-based controller
Purpose: Specifically designed for steam turbines to control their speed and provide overspeed protection.

II. Core Functions

Speed Control:
- 9904-206 Precisely controls the speed of steam turbines by adjusting steam inlet flow.
- Supports single-range or split-range actuators to accommodate turbines of different sizes.
Overspeed Protection:
- Incorporates triple independent overspeed protection logic to ensure rapid shutdown in case of overspeed, preventing equipment damage.
- Provides an overspeed test button for convenient on-site testing of protection functions.
Emergency Shutdown:
- Equipped with an emergency stop button for immediate shutdown in emergency situations.
System Protection:
- - Automatically switches control modes upon sensor failure to ensure uninterrupted system operation.
  - Offers local/remote control priority selection to adapt to different operational scenarios.

Important project testing

4.2.1 External current limit reduction test

When a voltage of -10V is applied to the XX terminal of the tested driver, the overcurrent monitoring function of the speed controller becomes ineffective.

According to the current reduction characteristic curve, it can be seen that the maximum output current is limited to 40% Imax. Set the speed setpoint to -5V,

turn on the drive enable for 3 minutes and then turn it off. Measure the waveform of the detection hole, and the Iist amplitude should be 4+0.4V. The “overcurrent”

indicator light is not on. The current reduction characteristic curve is shown in Figure 6.

Figure 6: Current reduction characteristic curve

4.2.2I2t monitoring test

The I2t function approximates the square of the actual current value and integrates the result. If the actual current value is 1.1 times the rated value, the integrator

integrates negatively, otherwise it integrates positively.

The specific test uses a test power board instead of the power module of the driver, closes the corresponding switch, and applies -1V voltage to the XX terminal.

According to the XX characteristic curve, the maximum output current is 100% Imax. In this testing interface, the speed is set to -5V, the drive is enabled to open,

and the waveform of W-hole Iist is measured. The recorded data is input into the corresponding unit, and the backend software can provide a conclusion on whether it is qualified or not

through calculation (the final trend of Iist amplitude decrease should be 1.1IN, and the maximum amplitude holding time T should be).

5. Conclusion

The drive testing system can test the drive in both offline and online states. The testing system can help debugging personnel quickly determine and understand the

status of the drive during debugging or use, and propose solutions. The operation is simple and fast, with good human-computer interaction. The system follows the

principles of generalization, standardization, and modular design, and has good interactivity, portability, and scalability.

The design of this testing system has been completed, providing great convenience for the maintenance and repair of the drive. At the same time, a portable

drive testing system is also under research and design and will be completed soon.

III. Technical Specifications

Power Supply: 18-32 VDC, supporting 24VDC input.
Display: Two-line x 24-character LED display for clear indication of operating status and parameters.
Enclosure: NEMA 4X or IEC 60529 IP56 rated for protection against harsh industrial environments.
Inputs/Outputs:
- Inputs: 6 programmable current inputs, 16 discrete contact inputs.
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs.
Communication Interfaces: 9904-206 Supports RS-232, RS-422, and RS-485 hardware interfaces for easy integration with host computers or other devices.
Software: Equipped with OpView™ and 505View software for parameter configuration, monitoring, and fault diagnosis.
Operating Temperature: -20 to +60°C (some models support -4 to +140°F).
Storage Temperature: -40 to +85°C (some models support -40 to +185°F).
9904-206 Weight: Approximately 9.11 pounds (4.13 kilograms).

IV. Application Scenarios

Steam Turbine Control: 9904-206Suitable for steam turbines of various sizes, including industrial steam turbines, small grid turbo-generators, and turboexpanders.
Single Extraction and Admission Applications: Designed for operating steam turbines in single extraction and/or admission applications.
On-Site Programming: Allows on-site operators to program and adjust parameters through an integrated operator control panel, adapting to different operating conditions.

V. Product Advantages

High Reliability:
- Microprocessor-based design ensures precise control and stability.
- Triple independent overspeed protection logic provides multiple layers of safety.
Flexibility:
- Supports various actuator and sensor configurations to accommodate different turbine models.
- Offers a rich set of input/output interfaces for easy system expansion and integration.
Ease of Use:
- Two-line x 24-character LED display provides an intuitive operating interface.
- A 30-key multifunctional keyboard simplifies parameter configuration and operation.
Compatibility:
- Supports multiple communication protocols for easy integration with DCS, PLC, and other systems.
- Provides OpView™ and 505View software for remote monitoring and fault diagnosis.