Simulation Analysis of Strength of Double Layer Structure of Prefabricated Substation

Abstract

The construction of the substation in the urban center has become a common phenomenon. There is a need to consider the cost of land, and make the substation covering a small area, safe and economical. This paper presents a new model of substation built with assembled upper and lower double layer structure of module blocks in the urban center, and proposes to install 110kV of prefabricated cabin on the top of 10kV and 35kV of prefabricated cabin, with a small area and easy construction, but the strength of double layer structure becomes the key to design. Based on the finite element theory, this paper establishes a finite element model of double layer structure of prefabricated substation in the finite element software ABAQUS, and carries out strength simulation analysis of the most unfavorable conditions, of which the inclined degree of the entire structure is 5°, and the seismic intensity is 8°. The research results show that: when the inclined degree of the entire structure is 5°, the maximum stress of the structure is 92.49MPa, and the safety factor of strength is 2.5; when the seismic intensity is 8°, the horizontal load excitation has a greater impact on the double layer structure, the maximum stress is 160.5MPa, and the safety factor is 1.5; the vertical load excitation has a less impact, and the maximum stress is only 30.3MPa. In the early period of design of the strength simulation analysis method, this paper can obtain the safety factor of strength of structure under the most unfavorable conditions, which has reference significance on the design and optimization of the structure of substation.