Turbine Supervisory Instrument (TSI)

TSI aims at monitor safe and reasonable steam turbine operation. TSI shows and records the starting and status processes of various parts in the turbine generator with real time during operation and also transfers signals to computers and data loggers. TSI generates signals for alarms and trips if the signal exceeds the limit value.

Measurement object:

TSI is used to measure measurement objects in the turbine generator as listed below:

  • Speed: speed of the turbine shaft (rotor)
  • Control valve position: the cam shaft rotation angle is combined with a steam control valve that regulates steam flow.
  • Eccentricity: deflection to the center of the shaft due to pressure from the turbine shaft
  • Shell expansion: Length of turbine expansion between the turbine shell in the axial direction
  • Differential expansion: the relative length of expansion between the turbine shell and shaft (rotor)
  • Vibration: vibration amplitude (vibration) of the shaft or bearing on the turbine generator.
  • Acceleration: acceleration of rotation of the turbine shaft

Operation:

In general systems, relay boards (A) are used for alarm display operation signals and other alarm equipment combined with vibration channel and differential channel when the signal exceeds the limit.

Alarm:

In general systems, relay boards (A) are used for alarm display operation signals and other alarm equipment combined with vibration channel and differential channel when the signal exceeds the limit.

Cabinet, power supply and Unit chassis:

Electronic circuits are installed entirely in the cabinet. In this cabinet there are DC power supply, failure display, test panel, chassis unit which includes circuit failure board and relay board, AC power supply and automatic voltage regulator.

Circuit boards and relay boards are inserted into the printed circuit board connector in the chassis unit. The chassis unit is selected according to the specific channel

Recording system:

Speed, control valve position, and eccentricity are recorded by 2-pen recorders depending on the operational conditions of the turbine generator as follows;

  • During turning: eccentricity
  • At the start: speed
  • During operation: valve control position

For shell expansion records and expansion differentials, recorders are commonly used and always record alternately without being connected with the operation of a turbine generator. The 7-pen recorder is used to record vibrations and always records independently of the operation of the turbine generator.

News Reporter
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