Woodward 505 Digital Controller For steam turbineses

To set parameters or combinations, refer to one or more typical application configurations that are displayed and similar to the desired control configuration, and then

Replace the displayed control parameters with the desired ones.

To apply a desired but not displayed control parameter or combination, refer to one or more displayed ones that are similar to what you want

The typical application configuration of the control configuration, and then replace the displayed control parameters with the desired control parameters.

Example - To configure 505 to perform a steam turbine exhaust pressure limiting function, use Example 1. "with steam turbine

The application of "pump or compressor outlet pressure control with machine inlet steam pressure limit" is used as a reference. Refer to this example and use exhaust steam

Replace the intake pressure and ignore any specified program Settings to control the outlet pressure of the pump or compressor.

The examples shown in this chapter are summarized as follows:

Example 1: Outlet pressure control of pumps or compressors with inlet steam pressure limits

Example 2: Intake steam pressure control with automatic synchronization and generator power limit

Example 3: Exhaust pressure control with input/output power limits

Example 4: Input/output power control of power plants with DRFD servo mechanism interface

Example 5: Intake steam pressure control with synchronous load distribution in island mode

Example 6: Input/Output power control of power plants with synchronous load distribution in island mode

Example 7: Induction generator control

This is a typical example of a pump or compressor application. With this application, the 505 is configured to normally control the pump/compressor

The outlet pressure is controlled, and the speed control valve position is limited based on the low steam inlet pressure of the steam turbine. Both the auxiliary mode and the cascade mode are used

This sample application. Other applications may or may not use the functions shown in Figure 3-1 and all of the following.

With this application, the pump/compressor outlet pressure is controlled within 505 through a cascade controller. Due to export pressure

To obtain control, which usually affects many other power plant processes, a power plant distributed control system (DCS) can be used

Monitor the process conditions of the power plant and set the positions of cascade setting values. This can be achieved through Modbus communication, discrete elevation and

Lower the instruction or execute it with an analog set value signal.

This application requires a control function restriction type to help maintain the steam intake main pipe when there is a problem with the system main pipe

Pressure. Because the auxiliary PID is the only controller with this capability, it is used according to the low steam turbine intake

The pressure setting is used to detect the steam inlet pressure of the steam turbine and limit the position of the speed control valve.

If a distributed control system of a power plant is used to detect by locating the loads (load distribution) of multiple pumps or compressors

To measure and control a process, this DCS can simulate an input with 505 through a configured remote speed setting value

Connect directly. This enables DCS to control power plants and systems by directly and simultaneously changing the rotational speeds of multiple pumps or compressors

Monitor and compensate under the unified conditions.

All 505 PID controller set values (speed, assist, cascade) can be increased or decreased through configuration

The contacts, configured 4-20mA input, Modbus instructions, or 505 service panel can be changed.