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WOODWARD 5501-372 is a digital microprocessor governor control module, serving as a core speed and load control component matched with the MicroNet control system. Specifically designed for full-process speed regulation and operating condition management of steam/gas turbines, turbine generator sets and turboexpanders, it integrates multi-mode control algorithms, real-time fault diagnosis and staged actuator driving functions. Adapted to the stringent control requirements of industrial turbines, it is widely used in power generation, petrochemical and other fields by virtue of high-precision speed regulation, flexible control logic and reliable diagnostic capability, providing core control support for stable turbine speed, precise load regulation and safe operation.
1. Product Attributes
Positioned as the core turbine speed control unit of the MicroNet system, this module is distinguished from general-purpose controllers. It focuses on the requirements of closed-loop speed regulation, load distribution and safety interlock of industrial turbines, while balancing control precision and system compatibility. The specific basic information is as follows:
Product Model: 5501-372
Product Type: Industrial-grade digital speed control module. Based on a microprocessor architecture, it integrates speed acquisition, control algorithm operation, actuator driving and fault diagnosis functions. Compatible with the MicroNet Simplex/Plus system, it provides an integrated solution for full-process speed and load control during turbine startup, grid connection, steady-state operation and shutdown.
Core Purpose: As the core control unit of the turbine speed regulation system, it collects signals from speed sensors, executes core algorithms such as speed control, load control and synchronization control (isochronous mode), and drives staged actuators to adjust steam/gas inlet valves or extraction valves, achieving precise and stable speed as well as dynamic load balance. With a built-in self-diagnosis function, it monitors system status in real time and triggers fault alarms to ensure safe turbine operation.
Basic Information: Manufactured by the original factory in the United States with industrial-grade hermetic packaging, it is suitable for standardized installation in MicroNet system cabinets. The minimum order quantity is 1 unit, and the warranty period complies with Woodward industrial product standards. It is mainly used for spare part replacement of existing MicroNet speed regulation systems and deployment of speed control units for new generator sets.
2. Technical Specifications
2.1 Electrical and Control Performance Parameters
The electrical design of the module is tailored to the stringent requirements of turbine speed regulation, focusing on control precision, signal adaptability and fault diagnosis reliability. The core indicators are as follows:
| Parameter Category | Core Indicators | Description |
|---|---|---|
| Control Modes | Supports speed control (steady-state accuracy ±0.01% of rated speed), load control (accuracy ±0.1% of rated load), and synchronization control (isochronous mode) | Adapted to the requirements of turbine speed regulation before grid connection, load distribution after grid connection, and parallel operation of multiple generator sets |
| Signal Adaptability | Speed input channels are compatible with Magnetic Pickup (MPU) signals; supports 4-20mA analog input (for load feedback, pressure monitoring, etc.); output channels drive staged actuators (compatible with Woodward Proportional Actuator series) | Matches turbine-specific speed sensors and actuators, ensuring the stability of signal acquisition and control command output |
| Actuator Driving | Staged actuator drive interface, supporting stepwise adjustment of steam/gas inlet valves and extraction valves with a drive response time of<100ms | Realizes smooth valve operation, avoids sudden changes in speed/load, and ensures stable turbine operation |
| Core Algorithms | Built-in safety control logic including critical speed avoidance, valve limiting and overspeed protection, with programmable control parameters | Adapts to the characteristic curves of different types of turbines, meets personalized control requirements, and improves operational safety |
2.2 Physical and Protection Specifications
Adopting an industrial-grade reinforced design, it is suitable for harsh on-site conditions such as vibration and dust in turbine environments. The specific parameters are as follows:
Dimensions and Weight: The size is adapted to MicroNet standard cabinet slots (approx. 220mm × 180mm × 50mm), with a single module weight of about 1.2kg. Its compact structure meets the dense layout requirements of control systems.
Protection and Material: The housing is made of cast aluminum with an IP20 protection rating and vibration-resistant design (compliant with IEC 60068-2-6 standard). It is suitable for industrial environments with pollution degree 2 and can resist slight dust and oil contamination.
Installation Method: Cabinet embedded installation, connected to the MicroNet system motherboard via a dedicated backplane connector. Wiring shall comply with the specifications of Woodward 26166 series manuals to ensure the stability of signal links and power supply.
2.3 Environmental Adaptability
Compliant with the stringent environmental standards for industrial turbine control modules, it can cope with temperature and humidity fluctuations and complex electromagnetic environments. The core indicators are as follows:
Temperature Range: Operating temperature ranges from 0℃ to 55℃, and storage temperature ranges from -40℃ to 105℃, suitable for medium and high-temperature working environments such as thermal power plants and petrochemical workshops.
Anti-interference Performance: Certified by CE for electromagnetic compatibility, it has 1500V AC channel isolation capability, which suppresses common-mode interference and surge voltage, ensuring the accuracy of speed signal acquisition and control command output.
3. Compatible Systems and Hardware Combinations
The module's compatibility focuses on Woodward MicroNet series control systems, adapting to specific sensors, actuators and system configurations. The specific combinations are as follows:
Compatible Control Systems: Core compatibility with MicroNet Simplex (single redundancy) and MicroNet Plus (enhanced) speed regulation systems, which can be connected as the main speed regulation module. It is compatible with the control logic of the 5009 series steam turbines and supports linkage with MicroNet I/O modules (e.g., 5466 series) and FTM modules (e.g., 5437 series).
Supporting Equipment and Links: Connectable to magnetic speed pickups (MPU), 4-20mA load feedback sensors and staged proportional actuators; realizes signal interaction with I/O modules via the MicroNet system motherboard. Shielded cables are recommended for connecting speed sensors to reduce electromagnetic interference.
Expansion and Linkage: Can work collaboratively with the MicroNet main control unit and Emergency Shutdown System (ESD) to implement safety control functions such as overspeed protection and emergency shutdown; supports parameter configuration and fault diagnosis via Woodward Toolkit software to improve operation and maintenance efficiency.
4. Product Features
High-precision Speed Regulation for Stable OperationThe steady-state accuracy of speed control reaches ±0.01% of rated speed, and the load control accuracy is ±0.1% of rated load. It meets the stringent precision requirements of turbine grid connection and parallel operation, reducing the impact of power grid fluctuations on the unit.
Multi-mode Control Logic for Full Operating Condition RequirementsIntegrating three core control modes (speed, load and synchronization), it can automatically switch according to turbine operation stages (startup, grid connection, steady state), meeting the full-process control needs of industrial turbines.
Staged Actuator Driving for Optimized Regulation ProcessSupporting stepwise adjustment of actuators, it realizes smooth valve operation, avoids equipment impact caused by sudden changes in speed/load, and extends the service life of turbines and actuators.
Built-in Self-diagnosis for Improved Operation and Maintenance EfficiencyIt monitors module status, signal links and actuator feedback in real time, triggers fault alarms and records fault codes, shortening on-site fault troubleshooting time and reducing operation and maintenance costs.
Deep Adaptation to MicroNet for Strong System CompatibilitySpecially designed for the MicroNet system, it can seamlessly connect with I/O and FTM modules in the system. As a dedicated core component for turbine speed control under the MicroNet architecture, it is suitable for multi-scenario applications of steam/gas turbines.
5. Application Scenarios and Safe Operation Precautions
5.1 Application Scenarios
With the advantages of high-precision speed regulation and multi-mode control, it is widely used in turbine speed regulation systems in the industrial power field:
Power Generation Industry: Used for speed regulation control of steam turbine generator sets and gas turbine generator sets in thermal power plants, ensuring stable speed before unit grid connection and precise load regulation after grid connection.
Petrochemical Industry: Adapted to speed regulation systems of oilfield-driven turbines and pipeline compressor turbines, realizing stable speed control, responding to load fluctuations and ensuring continuous and stable oil and gas production.
Industrial Power Field: Applicable to industrial turbines in steel, papermaking and other industries, providing stable power output to meet the power demand of continuous production.
5.2 Safe Operation and Maintenance Specifications
Installation and wiring must be performed by professional technical personnel. Before operation, disconnect the system power supply and confirm no voltage to avoid electric shock or module damage; shielded cables shall be used for wiring speed sensors, and the shielding layer must be reliably grounded to prevent signal interference.
Module parameter configuration shall be carried out via Woodward authorized software (Woodward Toolkit). Unauthorized modification of control parameters (such as critical speed and overspeed protection threshold) is strictly prohibited to avoid equipment damage or safety accidents.
Regularly check the module operation status, actuator action response and fault records. If abnormalities are found, stop the machine for troubleshooting in a timely manner; store the module in a sealed manner when idle to prevent dust and moisture from eroding the internal circuit.
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