STEAM TURBINE GOVERNOR CONTROL & VALVE ACTUATION

The main functions of a modern steam turbine control system including of speed control of the turbine and load control of generator by regulating and control the steam valve with the feedback of speed, generator KW output, also process parameter.

The intent of this Steam Turbine Governor Control is to maintain desired speed and load of the turbine shaft. Under normal operating conditions, the unit will be loaded while in this mode and maintain speed control from zero load to maximum load. The Speed control PID loop compares the actual speed signal with the speed reference and calculates an appropriate output response.

There are few modes of the speed control selection as follow:

    • Simple load droop operation provides safe operation in parallel bus applications in the event of a circuit breaker aux contact failure.
    • Isochronous operation when the bus is isolated
    • VAR/Power Factor Control (against utility) – Excitation system work.

In generator application, where the steam turbine parallel with a bigger system or grid, a droop governor characteristic is used, and the speed control shall perform the control function as illustrated in the following figure.

In the isochronous mode, the turbine unit shall be operated isolated, and the machine speed is equal to the speed reference.

 

Steam Turbine Control

TECG Control focuses on the control requirements on each application and providing the complete, cost effective system to improve the current asset the customer have.

With using the renowned PLC, it can provides all Turbomachinery Control & Turbine Protection functions in one platform.

With the field proven software, our control system provide the protection for your systems without sacrificing any of your production requirements. It comes with an easy-to-use configuration with IEC-61131 programming language.

At the sametime, field instruments and governing actuation upgrade are parts of our solution to improve the turbine system to better reliability, flexibility and efficiency to operate.

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