The new power system

characterized by distinct source-grid-load properties compared to traditional power systems

includes harmonics and even ultra-high harmonics.These harmonics can affect the vibration characteristics of the gas-insulated switchgear (GIS).This study begins with an analysis of the types and components of the harmonics generated by the source

grid

and load sides when integrated into the new power system.Then

a test platform for mea-suring the vibration characteristics of GIS under harmonic excitation is built.The study then investigates experimental research on the vibration characteristics of GIS under different harmonic current excitations

considering the specific harmonic characteristics present in power systems.The results indicate that the vibration amplitude of the GIS bus shell displays a linear distribution along the axial direction

with the vibration magnitude being inversely proportional to the end stiffness at the ends.When multiple harmonic currents are present

the interaction of harmonics-through their sum

difference

and doubling frequencies

enriches the vibration frequency spectrum

making it easier for GIS to produce mechanical resonance.