WOODWARD 505 Steam Turbine Controls

（2） Pressure control

Multiple pressure control modes: supports controlling or limiting the pressure of multiple parts of the turbine, such as intake, exhaust, and extraction. For example, at the inlet of a steam turbine, the inlet pressure can be precisely controlled according to actual needs to ensure that steam enters the turbine at an appropriate pressure and improve energy conversion efficiency; At the exhaust port, by controlling the exhaust pressure and optimizing the back pressure conditions of the turbine, the overall performance of the unit is improved. In some industrial production processes, precise control of steam pressure is required to meet specific process requirements. The pressure control function of WOODWARD 505 can adjust steam pressure in real time according to process settings, ensuring the stability of the production process and product quality.

Pressure protection mechanism: When the pressure exceeds the preset safety range, it can quickly trigger protective actions, such as closing the intake valve, adjusting the operating conditions of the turbine, etc., to prevent damage to equipment caused by abnormal pressure and ensure the safety of equipment and personnel. In industries such as chemical and refining, the pressure safety of steam systems is crucial. Once the pressure loses control, it may cause serious safety accidents. The pressure protection mechanism of 505 can respond to abnormal situations in a timely manner and avoid accidents.

（3） Load control and limitation

Flexible load regulation: The load of the steam turbine can be precisely controlled according to actual needs, which can achieve constant load operation and meet some application scenarios with high requirements for power output stability; It can also dynamically adjust the load according to external instructions or system requirements to adapt to changes in different working conditions. In the cogeneration system, the steam turbine needs to adjust the load in real time according to changes in thermal and electrical loads. WOODWARD 505 can quickly respond and accurately adjust, achieving efficient and comprehensive utilization of energy.

Load limiting function: In order to prevent overload operation of the steam turbine, a load limiting function is set. Based on the rated parameters and actual operating conditions of the equipment, a load upper limit can be set. When the load approaches or exceeds the upper limit, automatic adjustment measures such as reducing the intake air volume, lowering the speed, etc. are taken to protect the steam turbine from overload damage and extend the service life of the equipment. In industrial production, there may be temporary peaks in electricity or heat consumption, which may cause the load of the steam turbine to rise instantly. The load limiting function of 505 can effectively prevent the steam turbine from shutting down or being damaged due to overload, ensuring the continuity of production.

（4） Start and stop control

Multiple startup modes: Provides various startup programs such as manual, semi-automatic, automatic, and remote control. The manual start mode provides operators with sufficient on-site control and is suitable for scenarios that require fine tuning or specific operational procedures; The semi-automatic start mode achieves automation in some key steps, simplifying the operation process while retaining a certain amount of manual intervention space; The automatic start mode can automatically complete the start-up process of the steam turbine according to the preset program, including a series of complex operations such as warm-up, speed increase, and grid connection, greatly improving the accuracy and efficiency of start-up; The remote control mode allows operators to perform start-up operations through communication networks in control rooms or other locations far from the turbine, facilitating centralized monitoring and management. In some large industrial facilities, the start-up of steam turbines requires strict adherence to specific operating procedures. The multiple start-up modes of WOODWARD 505 can meet the needs of different scenarios, ensuring a safe and reliable start-up process.

Safe shutdown function: When abnormal conditions are detected (such as overspeed, overload, abnormal pressure, etc.) or shutdown instructions are received, the shutdown operation can be quickly executed. By closing the intake valve, triggering the emergency braking device, and other measures, the turbine can stop running quickly and safely, avoiding further expansion of the accident. In emergency situations, a fast and reliable shutdown function is the last line of defense to ensure the safety of equipment and personnel. The 505's safety shutdown mechanism can respond and execute shutdown operations in a very short time, minimizing losses to the greatest extent possible.

Working principle

WOODWARD 505 achieves precise control of steam turbines through its built-in microprocessor and a series of complex control algorithms. Its working process is mainly based on the principle of closed-loop control, which collects various operating parameters of the steam turbine in real time (such as speed, pressure, temperature, etc.), compares these parameters with the preset set values, and calculates the deviation between the two. Then, the microprocessor processes the deviation according to a pre-set control algorithm (such as PID control algorithm), generates corresponding control signals, and after amplification, conversion and other processing, transmits them to the actuator of the steam turbine (such as electro-hydraulic converter, regulating valve, etc.). By adjusting the action of the actuator (such as the opening of the regulating valve), the operating state of the steam turbine is changed, so that the actual operating parameters of the steam turbine gradually approach the set values, achieving stable and accurate control.