Studies on aseismic measure for multistage thyristor valves

Author

Nakagaki, S. ; Uchida, T. ; Koyama, M. ; Ikegame, H. ; Kobayashi, A. ; Takeda, H. ; Horiuchi, T. ; Magoroku, H. ; Sampei, M. ; Ohkubo, H.

Author_Institution

Toshiba Corp., Tokyo, Japan

Volume

6

Issue

4

fYear

1991

fDate

10/1/1991 12:00:00 AM

Firstpage

1819

Lastpage

1824

Abstract

The authors propose a method of supporting a thyristor valve using an aseismic isolation system to enhance its seismic performance. In this method, the thyristor valve is supported by laminated rubber bearings with a very small spring constant in the horizontal direction. Its natural frequency is thereby lower than the predominant frequencies of earthquakes and thus decreases conduction of the earthquake motion. Dynamic analysis and structural analysis were conducted for a structure aseismically supported by the method of this study and for a conventional floor-mounted structure. The effects of aseismic support were studied and it was proved that the stress generated was considerably decreased

Keywords

power convertors; thyristor applications; aseismic isolation system; dynamic analysis; floor-mounted structure; laminated rubber bearings; multistage thyristor valves; structural analysis; Costs; Earthquakes; Flexible structures; Frequency; Isolation technology; Rubber; Springs; Testing; Thyristors; Valves;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.97727

Filename

97727