Method and Experiment Research for Moving of Main UHV Substations Equipment in Full Assembly State

In UHV substation, moving main transformer and HV shunt reactor in full assembly can reduce the interruption duration in equipment replacement, which is important for the operation of the grid. The UHV transformer and HV shunt reactor are large in volume and heavy in weight. The moving of them in full assembly is a sophisticated process, considering the vibration in the moving will have negative effect on the stable operation of the equipment. This paper carried out method and experimental research on the moving of transformer and HV shunt reactor in full assembly. The research results indicated that the 1,000kV transformer can be moved in full assembly with specially designed track system and vehicle. The maximum acceleration in the moving test was 0.4g and the maximum pull force was 76.7 kN. Traction machinery with output force larger than 200kN is recommended for practice. The 1,000kV HV shunt reactor could be moved in full assembly by tractor vehicle, and the maximum acceleration in test was 0.32g. The results showed that the system designed in this paper is effective in vibration control of the moving process. To further control the vibration amplitude, it is recommended to improve the jacking process, such as applying elastic cushion in the contacting surface of jack or lifting the equipment synchronously.