Abstract
The finite element model of suspended converter valve in an UHVDC transmission project with characteristics of flexible is constructed, and its vibration characteristics are simulated and analyzed firstly. The results show that this kind of suspended converter valve has obvious long-period character. Secondly, the long period phase of standard response spectrum in Code for Seismic Design of Buildings (GB50011-2010) is modified, and then the artificial seismic wave is synthesized employing the triangular series method. The result shows that this artificial seismic wave has long-period character. Finally, the time-history seismic dynamic simulation of the converter valve is done, and the seismic responses of the converter valve excited by three kinds of seismic wave with different period characters are compared and analyzed. The results show that the swing and stress of the suspended converter valve are larger under the long-period seismic wave synthesized in this paper. The quasi-resonance damage caused by long-period seismic wave should be concerned specially in the actual UHVDC transmission project.
Highlights
UHVDC transmission project in China has been developing rapidly in recent years
Most of them in China choose real seismic records, such as El-centro wave and Taft wave, or artificial seismic waves obtained through the standard response spectrum in Code for seismic design of buildings (GB500112010)[6] as seismic wave data commonly
There is a clear note in Code for seismic design of buildings(GB50011-2010) that the seismic impact coefficient for buildings should be specially studied when its natural period is greater than 6.0s
Summary
The converter valve is one of the core equipment of the converter station or even the whole DC transmission project, it has complex structure and high operational reliability requirements. Many experts and scholars have done relevant research on the analysis of seismic characteristics of the suspended converter valve[1,2,3,4,5,6]. Most of them in China choose real seismic records, such as El-centro wave and Taft wave, or artificial seismic waves obtained through the standard response spectrum in Code for seismic design of buildings (GB500112010)[6] as seismic wave data commonly. It is worth further to discuss whether the standard response spectrum is suitable for the seismic research of the converter valve with flexible characteristics
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