Experimental research of vibration characteristics of shunt reactor

The widely developed and used HVDC transmission systems will cause DC bias phenomenon occurred in some electromagnetic facilities of power grids with the results of several negative effects on the secure and reliable operation, including vibrations and noises. However, there has been few studies regarding the influence DC bias has on shunt reactors. To fully explore the vibration characteristic of a shunt reactor and then reduce its vibration, this paper discusses the experimental results of a shunt reactor under different voltages, currents and additional DC currents. Through the experiment and following analysis, we found that the vibration intensity rises with the increase of voltage, current and additional DC current and the frequency spectrum of vibration changes as well. Then a characteristic quantity of the vibration frequency is introduced to reflect the working condition of a shunt reactor. This experimental analysis is helpful for developing on-line monitoring system for shunt reactors.