PREDICTION OF GAS TURBINE TRIP DUE TO ELECTRO HYDRAULIC CONTROL VALVE SYSTEM FAILURES

摘要

Gas turbines are the main power producing components in combined cycle and simple cycle power plants. A gas turbine trip is a rapid uncontrolled shutdown of the turbine that is initiated by the turbine controller to protect it from failures. The turbine loses significant amount of life due to strong thermal transients during a trip and the utility company loses revenue because of lost power generation. Therefore, prediction of trips has significant financial impact. This paper presents a method to predict gas turbine trips due to electro hydraulic control valve system failures. This paper also provides methods to detect gas control valve system failures in their incipient phase and methods to identify various failure signatures for diagnostics. The methodology presented here could be extended beyond the current application to other causes of trips in the gas turbine, thereby impacting availability and reliability of the turbine.