Description

Live steam temperature measurement

Требования к данной позиции измерения

  • dynamic calculations
  • fast response
  • vibration resistant

Description

Reheat steam flow measurement

Требования к данной позиции измерения

  • Process control and performance testing
  • ASME PTC, IEC 60953
  • redundancy, e.g. materials P91/P92

Description

Pressure measurement of HP steam

Требования к данной позиции измерения

  • High pressure
  • High temperature

Description

Pressure measurement of reheat steam

Требования к данной позиции измерения

  • High pressure
  • High temperature

Description

Process pressure measurement after steam bypass

Требования к данной позиции измерения

  • High pressure
  • High temperature

Description

Process pressure measurement after steam bypass

Требования к данной позиции измерения

  • High pressure
  • High temperature

Description

Live steam temperature measurement

Требования к данной позиции измерения

  • dynamic calculations
  • fast response
  • vibration resistant

Description

Live steam pressure measurement

Требования к данной позиции измерения

  • High pressure
  • Low maintanance requirements

Description

Temperature measurement lubrication system

Требования к данной позиции измерения

  • Process control

Description

Reheat steam flow measurement

Требования к данной позиции измерения

  • Process control and performance testing
  • ASME PTC, IEC 60953
  • redundancy, e.g. materials P91/P92

Description

Turbine pressure measurement

Требования к данной позиции измерения

  • Redundancy
  • fast response
  • Overload protection

Description

Level measurement of condenser

Требования к данной позиции измерения

  • Redundancy
  • Low pressure
  • Diaphram seals

Description

Temperature measurement bypass steam

Требования к данной позиции измерения

  • dynamic calculations
  • fast response
  • vibration resistant

Description

Temperature measurement lubrication system

Требования к данной позиции измерения

  • Process control

Description

Temperature measurement lubrication system

Требования к данной позиции измерения

  • Process control

Description

Pressure measurement lubrication system

Требования к данной позиции измерения

  • Process control

Description

Strainer resistance measurement

Требования к данной позиции измерения

  • Process control

Description

Temperature measurement of lube oil

Требования к данной позиции измерения

  • Process control

Description

Level measurement of lube oil

Требования к данной позиции измерения

  • Process control

Description

Level measurement of lube oil system

Требования к данной позиции измерения

  • Process control

Overview

Steam Turbine Generator (STG) in combined cycle power plant

Safe and reliable ST operation

Turbine Generator

In general, the design of a steam turbine is classified by the condition of the turbine exhaust i.e. backpressure, condensing, extraction and reheat. Steam turbines in combined cycle applications are specifically developed as multi-pressure condensing types, using water cooling provided from a cooling tower or air cooler, and direct coupled to a generator and optimized for reheat. A steam turbine generator is defined by the various system components, such as: HP-IP-LP turbine, generator, lubrication and hydraulic oil system, gland steam supply, vacuum breaking and drain systems, and turbine measurement, protection and control system.

High-Pressure Steam Bypass

In a triple pressure with reheat HRSG, the high-pressure steam bypass is located downstream of the HP superheater. During plant start-up the high-pressure steam bypass will release the HP steam to the cold reheat system according to the requirements of the steam turbine. If, in this system, the pressure of the HP steam exceeds the setpoint of the steam bypass controller, the HP steam bypass opens and releases the HP steam to the cold reheat system. Then, via the reheater section through the intermediate-pressure bypass station to the steam is released to the steam turbine condenser. Many of these industrial boiler co-generation applications are also able to run in Island Operation in case of a national power grid failure, to provide the required process steam to the adjacent production plant, and facilitate a safe shut down.

Pressure and temperature measurements are pivotal for a safe and efficient turbine operation. KROHNE offers a full range of state of the art OPTIBAR absolute-, gauge- and differential-pressure transmitters. The OPTITEMP temperature measurement series offers a complete capability, including thermowells, sensors and transmitters suited for power generation applications, all supplied with static and dynamic stress calculations and the required documentation.

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