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Date:2022-08-29

Indexed by:Journal Article

Date of Publication:2022-07-03

Journal:振动工程学报

Institution:建设工程学部

Issue:2

Page Number:226-231

ISSN:1004-4523

Abstract:Aseismic problem of the ultra-high voltage (UHV) DC transmission projects is one of the most serious problems for the transmission system. A great difference lies in the dimension, static and dynamic characteristics between UHV reactor and middle high voltage one, so the aseismic performance is most important to the safety of electric network. In order to study the seismic behavior of UHV reactor, a shake table test on a big scale model was carried out. According to similarity relationship between physical parameters deduced by elasticity-gravity similarity law, an experimental model of UHV reactor was designed. After comparing the seismic behavior of UHV reactor under different earthquake excitations, the dynamic responses of system, such as accelerations, displacements and strains at key positions, and vulnerable parts were acquired. Results show that the acceleration responses at different layers are enlarged in some extent. The bottom and top of post insulator are the seismic vulnerable parts of the equipment due to its complex stress state. Vertical seismic excitations have less influence on the acceleration and displacement responses, but great influence on the dynamic strains. So vertical earthquake should be considered in the seismic design of UHV reactor.

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