Abstract
To explore the vibration response of the GIS busbar enclosure in a strong electric field, the electric force on the busbar enclosure was solved by the voltage in the circuit and the principle of virtual work. The vibration mode was obtained by finite element technology. Accordingly, the vibration response of the busbar enclosure was obtained by vibration analysis in the frequency domain, and the vibration acceleration of the busbar was monitored in the substation. The simulation results showed that the busbar enclosure was subjected to the electric force because of the fundamental voltage and harmonic voltages in the conductor. By coupling the radial electric force and the vibration mode, it was found that the vibration responses of the busbar enclosure at 100 Hz and 2900 Hz were greater than those at other frequencies. The experimental result showed that the frequency with the highest vibration amplitude was the same as that of the simulation result, and the vibration acceleration amplitude in the experiment and simulation at 2900 Hz was basically consistent, which verified the accuracy of the simulation result. The study shows that the GIS enclosure shell will produce vibration at the two times power frequency and high frequency, which provides an explanation for the high-frequency vibration of busbar shell structure in the ultra-high-voltage substation and provides an objective basis for the design of the busbar enclosure in the ultra-high-voltage substation.
Highlights
Gas-insulated switchgear (GIS) is widely used in highvoltage power system substations because of its compact size and high reliability [1]
The vibration responses in the simulation and experiment are obtained in Section 2. e conclusions are obtained in Section 3. e results show that the vibration responses in the simulation and experiment are relatively consistent, indicating that the vibration of GIS busbar enclosure was caused by harmonic voltages in the circuit under the condition of no fault, which provides an explanation for the high-frequency vibration of busbar shell structure in the ultra-high-voltage substation
By comparing the numerical results with the experimental results, it can be shown that the GIS enclosure shell will produce vibration at the two times power frequency and high frequency
Summary
Gas-insulated switchgear (GIS) is widely used in highvoltage power system substations because of its compact size and high reliability [1]. The main excitation in the substation is current and voltage, which leads to the vibration of the electric equipment in normal operating condition. Many scholars studied the vibration responses of the busbar under the action of the electromagnetic force generated by the power frequency current [13,14,15,16], and they considered that the electromagnetic force is the main cause of the busbar vibration. E results show that the vibration responses in the simulation and experiment are relatively consistent, indicating that the vibration of GIS busbar enclosure was caused by harmonic voltages in the circuit under the condition of no fault, which provides an explanation for the high-frequency vibration of busbar shell structure in the ultra-high-voltage substation The vibration responses in the simulation and experiment are obtained in Section 2. e conclusions are obtained in Section 3. e results show that the vibration responses in the simulation and experiment are relatively consistent, indicating that the vibration of GIS busbar enclosure was caused by harmonic voltages in the circuit under the condition of no fault, which provides an explanation for the high-frequency vibration of busbar shell structure in the ultra-high-voltage substation
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