WOODWARD 505XT 8200-1312 Industrial Control

WOODWARD 8200-1312 is a digital steam turbine controller within Woodward’s Peak 150 series. Specifically designed to control condensing or back-pressure steam turbines with single valves or single actuators, it stands as a classic and highly reliable regulating device in industrial power control.

1. Product Overview

The Peak 150 (8200-1312) is a cost-effective, fully-featured microprocessor-based control unit. Its core function is to precisely regulate steam turbine speed or load by controlling the opening of the steam regulating valve according to preset parameters. It is typically mounted on a control cabinet panel and operates as a standalone unit.

2. Key Functions and Technical Features

Precise Speed Control: Supports dual dynamic settings (Dynamic Parameters A and B) for seamless transition based on turbine characteristics during different operating conditions (e.g., ramp-up and grid synchronization).

Multiple Operating Modes:

* Speed Control: Maintains constant rotational speed.

Cascade Control: Receives external signals (e.g., exhaust steam pressure or extraction steam pressure) for closed-loop regulation.

Auxiliary Control: Provides limit control functionality.

Critical Speed Avoidance: Supports configurable critical speed bands to ensure rapid bypass of resonance zones during turbine acceleration.

Remote Control: Supports 4-20mA remote speed setpoint input.

Safety Protection: Features built-in overspeed protection logic, MPU (magnetoelectric sensor) fault detection, and actuator failure alarms.

Field Programming: All PID parameters and limit settings configurable directly via front-panel buttons and display without external computer.

Usage and Commissioning Method

Installation Location: Typically flush-mounted on the front of the generator control panel with rear wiring.

Configuration Process: Enter “Configuration Mode” to define basic generator parameters (e.g., tooth count, maximum speed), then adjust PID gains in “Run Mode” to optimize response curves.

Monitoring: During operation, operators monitor real-time RPM, setpoint values, and actuator output percentage via the LCD display.

Fault Reset: Upon detecting an alarm or shutdown signal, clear the locked state by pressing the “Reset” button on the panel after troubleshooting the fault.