Product Introduction
The Woodward 9907-167 is a digital speed control controller (Digital Governor / Digital Control Unit), mainly used in industrial steam turbine control systems, providing precise speed and load regulation functions. It serves as the core control module in steam turbines, generator sets, small turbine generators, and other industrial power machinery, ensuring the safe, reliable and efficient operation of the equipment.
Technical Specifications
|
Brand |
WOODWARD |
|
Model |
9907-167 |
|
Description |
Digital Governor |
|
Origin |
USA |
|
Dimension |
45*45*25cm |
|
Weight |
3.45kg |
| Power supply voltage | 18–32 V DC |
| Power consumption | Approximately 15 W |
| Isolation | Input - output isolation up to 1000 V DC |
Main Functions & Application
Steam turbine speed regulation and load control
9907-167 The control unit is equipped with advanced digital PID speed regulation algorithm. It collects the rotational speed signal in real time through speed sensors (such as pulse/proximity probes), and performs control output on the main steam valve or bypass air valve to achieve precise dynamic regulation of speed and load.
Comprehensive control and protection logic
This controller integrates various control strategies such as key control logic, overspeed protection, priority control, and limit control internally. It can maintain the stability of the system during normal operation and changes in working conditions, and trigger protection actions in abnormal conditions such as overspeed and stall.
Status display and on-site operation interface
With front panel display and operation buttons, it can show real-time operating parameters (such as speed, load setting, feedback value, etc.), facilitating on-site debugging, monitoring and parameter configuration.
Multi-purpose industrial application
Suitable for various medium and large-sized steam turbines and their accompanying power generation units, compressor drives, water pumps, and other industrial equipment control scenarios.
Technical Features
1️⃣ Precise digital speed control
9907-167 505 Digital Governor employs advanced digital PID control algorithm, which can promptly collect the engine speed and load signals, precisely adjust the opening degree of the steam valve or bypass valve, and achieve high-speed dynamic response and stable speed control. This feature enables it to maintain the smooth operation of the system even when the load changes rapidly in industrial power generation units or steam turbine systems, significantly reducing mechanical vibration and stress.
2️⃣ Multi-channel input and output interfaces
As the 9907-167 505 Digital Governor, this controller features a wide range of input and output channels, including analog input (4–20 mA), digital input, relay output, and actuator output, which can directly control external devices such as valves, pumps, and alarms. The modular interface design enables flexible integration in various industrial systems, allowing for comprehensive monitoring and control of turbine parameters, system status, and safety alarms.
3️⃣ Human-computer interaction and on-site visualization
9907-167 505 Digital Governor is equipped with a front-panel LCD display and a keypad operation interface. Engineers can view key operating parameters such as speed, load, set value, and alarm status in real time on-site. It also supports on-site parameter adjustment. The intuitive display and operation make maintenance and debugging more efficient, reducing the error rate in the engineering site.
4️⃣ Industrial-grade robust design
The 9907-167 505 Digital Governor controller features a robust casing and is designed to operate in industrial environments. It has a wide temperature range (-40°C to +65°C) and is resistant to vibration and shock, ensuring stable operation for long periods in harsh conditions such as power plants, chemical plants, or ships. The protection level can be selected as NEMA 4X, suitable for humid, dusty, or slightly corrosive environments.
5️⃣ Standard Communication and System Integration
As the 9907-167 505 Digital Governor, it supports standard industrial protocols such as Modbus RTU and can be integrated with distributed control systems (DCS), PLCs or monitoring software (such as Woodward RemoteView) to achieve remote monitoring, data acquisition and system diagnosis functions, thereby enhancing the intelligent management capabilities of the overall system.
Keys Benefits
Modular design and convenient maintenance
This controller adopts a modular structure. The 9907-167 505 Digital Governor can be quickly replaced or upgraded, reducing downtime and facilitating spare part management and long-term operation. This significantly enhances the maintainability of the system.
Flexible system integration capability
9907-167 505 Digital Governor supports multiple input/output configurations and communication protocols, enabling it to be flexibly deployed in various industrial environments and existing control systems, thereby reducing engineering renovation costs.
Enhance safety and protection
Built-in speed limit, overspeed protection, priority control and alarm logic. The 9907-167 505 Digital Governor can promptly trigger protection actions in abnormal conditions, ensuring equipment safety and enhancing the overall safety of industrial production.
Longevity and environmental adaptability
Thanks to its industrial-grade design and resistance to vibration and high temperatures, the 9907-167 505 Digital Governor can operate reliably in high-temperature, humid or highly-vibratory environments, extending equipment lifespan and reducing maintenance frequency.
Key Questions & Answers
Q:1.For which type of prime movers is the 9907-167 505 Digital Governor mainly applicable?
A:The 9907-167 505 Digital Governor is specifically designed for speed regulation and load control of steam turbines. It is applicable to condensing, back-pressure, and extraction steam turbine systems, and is commonly found in industrial self-owned power stations, cogeneration plants, and process-driven marine engines.
Q:2.Does this model support the switching between grid-connected and isolated-grid operation modes?
A:Yes, the 9907-167 505 Digital Governor supports the isolated-grid operation, grid-connected operation, and smooth switching between the two modes. It can meet the operation requirements of the generator set under different grid conditions and avoid speed or load fluctuations during the switching process.
Q:3.9907-167 505 Digital Governor is usually how it cooperates with the upper-level system in the project?
A:This controller can operate as an independent speed control unit for the engine, or it can be connected to the DCS or PLC system via standard industrial communication protocols for centralized monitoring, parameter reading, and operation status management. It is suitable for new projects and system upgrades.
Q:4.Does this model have high requirements for on-site conditions during the engineering debugging stage?
A:The 9907-167 505 Digital Governor supports on-site local debugging. The parameter setting logic is clear, and it is suitable for completing initial tuning and optimization directly at power plants or industrial sites. Usually, the basic configuration can be completed without the need for additional dedicated debugging equipment.
Q:5. Is 9907-167 505 Digital Governor suitable for long-term continuous operation conditions?
A:This model is designed for continuous industrial operation scenarios and is suitable for steam turbine systems that operate throughout the year or under high load conditions. It can meet the requirements for long-term stability in power generation and process control.
Q:6.When upgrading the system or replacing the old speed governor, does this model have compatibility advantages?
A:The 9907-167 505 Digital Governor is often used to replace traditional mechanical or early electronic speed governors. Its standardized interface and flexible configuration method make it possible to complete the upgrade without significantly altering the original control system.