Steam turbines

Steam turbines may be used as power turbine for compressors or, combined with a generator, for power generation. The steam may also be used as a constant-pressure source for diverse steam networks at different pressures, for chemical processes or for heating.

Steam turbine control has to meet multiple requirements, depending on the field of application. Next to automatic start/stop with optimized warm-up they may need stable pressure control for multiple extraction pressures, power control or speed control for generator operation.

Requirements

  • Automatic start-up with optimized warm-up of the turbine
  • Switching between generator power control in grid mode and frequency control in island mode
  • Stable extraction pressure control with multiple extraction pressures, even at sudden load changes
  • Stable control at load shedding
  • Safe overspeed protection, often with an independent safety system

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