Vibration analysis and control of Pipeline Vibration of Large-capacity Synchronous Condenser in UHV Converter Station

Abstract

Aiming at evaluating and treating the pipeline vibration of large-capacity synchronous condenser, a speed sensor was used to test the vibration of the large-capacity synchronous condenser piping system, and the evaluation was conducted with reference to the DL/T292 standard. It was found that the vibration of the lubricating oil pipe far exceeded the value in the standard. The finite element model of the pipeline was established with the given constraint processing method and the modal analysis of the pipeline was carried out with WORKBENCH software. The calculation results show that the lubricating oil inlet pipe resonates because the 15rd-order natural frequency 50.036 Hz is close to the rotor frequency of the Synchronous Condenser 50 Hz, and the vibration amplitude far exceeds the value in the standard. The influence of support’s stiffness on the low order vibration characteristics of the pipeline was analyzed. The method of adding damper and adjusting bracket is proposed to reduce the vibration of pipeline. Practice shows that it is feasible to use the method of finite element vibration analysis combined with on-site vibration testing to evaluate and control the vibration of the pipeline of the Synchronous Condenser.