High Pressure Turbine Casing Expansion Measurements in Thermal Power Stations Using Smart Sensor

Authors

  • G. Sudha
  • G. Karthick Thyagesh
  • V. A. Prabhakaran
  • G. Pradeep Kumar
  • J. Dhilip Kumar

Abstract

The high pressure steam generated in thermal plant is forced to the high pressure turbine with high temperature which results in the expansion of its casing. Currently this measured by using Linear Variable Differential Transformer (LVDT), which is a contact type device. Due to the high temperature in HP turbine the heat is transferred to the LVDT which cannot sustain and causes it to fail. Instead Ultrasonic sensor which is a non-contact type controlled by microprocessor can be employed. The main advantage of this sensor is that it can sustain very high temperature and has accuracy in any kind of operating condition. It also reduces the conduction losses. This sensor is cost efficient when compared to LVDT. Thus, by using microprocessor module we can pre-set a value for alert system. Thus, when the determined value is in excess of the pre-set value the buzzer initiates an alarm and when the determined value exceeds the critical preset value this module provides a trip signal which stops the further ongoing process. 

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Published

2020-02-04

Issue

Section

Articles