Experimental Study on the Acceleration Amplification Ratio of Cable Terminations for Electric Power Facilities

Bub-Gyu Jeon, Sung-Jin Chang, Sung-Wan Kim, Dong-Uk Park () and Nakhyun Chun
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Bub-Gyu Jeon: Seismic Research and Test Center, Pusan National University, 49, Busandaehak-ro, Yangsan 50612, Republic of Korea
Sung-Jin Chang: Seismic Research and Test Center, Pusan National University, 49, Busandaehak-ro, Yangsan 50612, Republic of Korea
Sung-Wan Kim: Seismic Research and Test Center, Pusan National University, 49, Busandaehak-ro, Yangsan 50612, Republic of Korea
Dong-Uk Park: Seismic Research and Test Center, Pusan National University, 49, Busandaehak-ro, Yangsan 50612, Republic of Korea
Nakhyun Chun: Structural & Constructional Technology, Group, KEPCO Research Institute, 105, Munji-ro, Yuseong-gu, Daejeon 34056, Republic of Korea

Energies, 2024, vol. 17, issue 22, 1-17

Abstract: Among national infrastructure facilities, electric power facilities are very important sites that must maintain their functions properly even during a natural disaster or during social crises. Therefore, seismic design is required when necessary for major electric power facilities that have a significant impact when damaged in the event of an earthquake. In electric power facilities, bushings are generally installed in devices or structures. Therefore, ground acceleration can be amplified through devices, such as transformers, or sub-structures. Among various electric power facilities, cable terminations are representative cantilever-type substation facilities consisting of a bushing, a sub-structure, and support insulators. The bushings of cable terminations are generally made of porcelain or fiber-reinforced plastic (FRP) materials, and they may have different dynamic characteristics. This study attempted to estimate the acceleration amplification ratio in the main positions of cable terminations considering the materials of bushings. For two cable terminations with different specifications and bushing materials, three-axis shake table tests were conducted in accordance with IEEE 693, which includes a seismic performance evaluation method for a power substation facility. The acceleration amplification ratios at the top of the bushing, mass center, and top of the support structure were estimated using the acceleration responses of each cable termination. They were then compared with the acceleration amplification factors presented in design standards. Consequently, the acceleration amplification ratio of cable termination with an FRP bushing was lower than that of the cable termination with a porcelain bushing.

Keywords: seismic performance; electric power facility; bushing; amplification ratio; shaking table test; cable terminations (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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