Calculation of The Dynamic Characteristics of 145 kV Vacuum Switch Transmission System

Abstract Key components such as connecting rods will deform and break under impact. To solve this problem, a 145 kV vacuum switch transmission system model is established. A flexible body dynamics simulation model considering factors such as contact and collision is constructed based on ANSYS. The stress distribution law of the transmission connecting rod during the closing process of the mechanism is analyzed. The calculation results show that the maximum stress of the turning arm always appears at the front corner, and the maximum value is 260.82 Mpa. The hole at the connecting rod and the combined position are the main areas of stress concentration, and the maximum value is 379.83 Mpa. The sharp decrease of the force area is the main factor leading to the phenomenon of high concentration of stress. Therefore, it is necessary to further optimize the structure of the key components of the transmission system. In this paper, the reliability of the vacuum switch is studied to ensure that the vacuum switch can quickly cut off the fault circuit in the complex grid environment, which can provide technical support for the construction of a new green energy grid.