Integrated Turbine Control for Double Auto Induction Steam Turbine

Project Overview
The aim of the integrated turbine control system is provide all control and safety functions for the turbine in one fully integrated package.

A new control system was designed for a Double Auto Induction Steam Turbine on a Westinghouse M32 double inlet, controlled back pressure turbine, coupled to a Westinghouse hydrogen cooled synchronous generator, running at 3600rpm and producing 10.3MW.  The original governor control system was a Woodward 43027 custom analog controller, driving two EG10P actuators to control the speed and load on the turbine.

This is a complex set of interdependent elements all trying to control their own process. Each process looks and acts independent, in reality they are not. Using the turbine manufacturers data, a ‘Steam Map’ is created with respect to min and max Inlet flow, min and max kW, min and max HP flow, min and max LP flow.

Control System Components

• Woodward 505E Steam Turbine Controller - controls the speed or load, HP Induction, Exhaust Pressure of the turbine and the position of two valves, V1 and V2.
• Woodward Atlas-SC with Power Sense Board – synchronizing, load sharing, power management with custom software to provide site specific control and monitoring functions
• Woodward ProTech 203 Overspeed Detection System
• HMI (Human machine Interface) – to monitor the Integrated turbine Control parameters and allow operators to make control judgments and adjust the system accordingly.
• Woodward EG10P Actuation

Control/Customer Benefits
The core modules of the new control system are globally supported.  The new control system is flexible with a customizable interface sequencer.  The system is modular in design, offering easier fault finding and maintenance and more economical replacement of obsolete modules instead of replacing the whole system.

GCS Reference: 7310