Vibration Analysis For Reducing Excessive Vibration Level on Gas Turbine Generator (GTG) 100 MW in Cogeneration Power Plant

Abstract

The goal of this research was to gather knowledge and to analyze the problem of excessive vibration level of Gas Turbine Generator (GTG) 100 MW system installed in cogeneration power plant in Sumatra Island, Indonesia which supports one of biggest oil and gas industries in Indonesia. The case research related to vibration problem were presented to diagnosis the main causes of excessive vibration that occur in the gas turbine generator during operation. Vibration analysis is one of the most important activities in predictive maintenance. Vibration monitoring system and machinery diagnostic technical specification are presented. The vibration data of this research were collected using online vibration monitoring system Bently Nevada 3500 series and system 1® display software at different bearing locations during transient (shutdown & start-up and steady state (on-line) condition. Assessment on overall vibration levels shall refer to Original Equipment Manufacturer (OEM) alert & danger set points, as well as relevant ISO 20816-2 standard. Finally, recommendation of reducing excessive vibration level is provided to ensure safe and reliable operation of the GTG unit.

Predictive Maintenance Neural Control Algorithm for Defect Detection of the Power Plants Rotating Machines Using Augmented Reality Goggles

“…The authors of [25] described a vibration analysis method designed for the gas turbine generator (GTG) used in cogeneration power plants. It allows for the technical condition of the engine that drives GTG since abnormal vibration levels can occur in the case of unbalanced rotating elements, misalignment and looseness of mechanical parts, and other malfunctions, such as fatigue cracking of the machine's rotor.…”