WOODWARD 505 Steam Turbine Controls

For example, in the process of speed control, the speed sensor installed on the turbine shaft transmits the real-time detected speed signal in frequency form to WOODWARD 505. The internal frequency/voltage converter of 505 converts the frequency signal into the corresponding voltage signal, and then compares it with the preset speed setting value to calculate the speed deviation. The microprocessor calculates the deviation based on the PID control algorithm and generates a control signal. The control signal is output to the electro-hydraulic converter (I/H or CPC) in the form of a 4-20mA current signal. The electro-hydraulic converter converts the current signal into the corresponding secondary oil pressure (usually 0.15-0.45MPa), which acts on the throttle spool valve to control the opening of the regulating valve, change the steam flow entering the turbine, and ultimately achieve the regulation of the turbine speed to stabilize it near the set value.

Key advantages

（1） High user configurability

Flexible parameter settings: Users can flexibly set various control parameters (such as speed setting value, pressure control range, load limit value, etc.) of WOODWARD 505 according to the specific model, operating conditions, and actual application needs of the steam turbine, without the need for special control engineers, greatly improving the adaptability of the product to different application scenarios. For different types of steam turbines, there may be significant differences in their rated parameters and operating characteristics. The flexible parameter setting function of 505 allows users to customize configurations according to actual situations, fully leveraging the performance advantages of steam turbines.

Custom control logic: allows users to customize some control logic based on specific process flow and control requirements, such as startup sequence, protection action logic, etc., to meet personalized control needs. In some special industrial production processes, it may be necessary to design the control logic of the steam turbine specifically to meet the special requirements of the production process. The custom control logic function of WOODWARD 505 provides great convenience for users and enables customized control solutions.

（2） Advanced graphical interface and convenient operation

Intuitive graphical display: Equipped with an 8.4-inch (21 centimeter) graphical display interface, it can display the actual operating values and set values of the steam turbine in both visual and numerical forms, such as speed, load, pressure and other parameters, allowing operators to understand the operating status of the steam turbine at a glance, simplifying the operation process and reducing the probability of operational errors. In practical operation, clear and intuitive graphical displays can help operators quickly obtain key information, make correct decisions in a timely manner, and improve work efficiency.

User friendly operation panel: The front panel design is simple and easy to operate. Through a series of functional buttons and menu driven operation methods, engineers can easily access and program the specific factory requirements of the unit. Factory operators can also easily perform operations such as starting, stopping, and switching control modes of the turbine. At the same time, the password security protection function ensures that only authorized personnel can modify key parameters and program settings of the device, ensuring the security and stability of device operation. Even operators who are not familiar with the control system can quickly get started using WOODWARD 505 through simple training, reducing the technical threshold for operators and improving the usability of the equipment.

（3） Powerful communication and system integration capabilities

Rich communication interfaces: Equipped with two independent Modbus communication links (supporting ASCII or RTU protocols, compatible with RS-232, RS-422, or RS-485 interfaces), it can easily connect with other industrial automation equipment such as DCS systems PLC、 The upper computer and other devices are used for data communication and interaction, enabling remote monitoring, data collection and analysis of the steam turbine, as well as integration with the entire factory automation system. In modern industrial production, interconnection between equipment is crucial. The rich communication interfaces of WOODWARD 505 enable it to seamlessly integrate into the factory's automation network, achieve centralized control and management, and improve production efficiency and management level.

Distributed I/O Expansion: Supports distributed I/O (such as Link Net HT) expansion, which can flexibly increase input/output channels according to actual needs, connect more sensors and actuators, and achieve more comprehensive and refined control of the steam turbine. For example, in some complex steam turbine systems, it is necessary to monitor and control more parameters such as oil temperature, vibration, displacement, etc. Through distributed I/O expansion, WOODWARD 505 can easily meet these requirements and improve the system's control capability and reliability.