Shaking Table Test on 145 kV HV Reactor Composite Bushing

Sun, Yongjun; Liu, Wen Ying; Su, Zhi Gang; Liu, Zhen Lin

doi:10.4028/www.scientific.net/amr.1065-1069.1480

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…Electrical substations are critical components in the electrical network that supplies power for industrial, business, and residential uses. Electrical substation equipment have exhibited vulnerable seismic behaviors during past earthquakes, such as the 1994 Northridge earthquake in California, the 1999 Chichi earthquake in Taiwan, and the 2008 Wenchuan earthquake in Sichuan. Anagnos compiled the equipment performance data from past earthquakes and organized the data into a database.…”

Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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Summary It is of great significance to conduct seismic qualification and mitigation for composite bushing, whose damage may cause massive power outage and huge cost of repair. In this paper, the annular tuned liquid damper (ATLD), utilizing the sloshing characteristics of transformer oil in the dome, is proposed to reduce the seismic responses of the composite bushing. As to the annular feature of the metallic dome, the simplified formulas for calculating the liquid sloshing frequencies in the dome are derived based on the linear wave theory, which provides a direct and fast way for the predesign of ATLD. Comparing with the experimental results reported in literature, the accuracy and applicability of the proposed formulas are verified. In addition, parametric studies of the first 3 sloshing frequencies including liquid height and the outer and the inner radii are carried out. The optimal tuning analysis of vibration reduction in frequency domain is performed on the structure base excitation. The vibration reduction analyses in time domain of the ATLD for the composite bushing subjected to real earthquake records are carried out and discussed simultaneously. It is shown that the simplified formulas presented in this paper provide a convenience for the predesign of ATLD and the optimal ATLD is effective in reducing the vibration of the composite bushing.

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Section: Introductionmentioning

confidence: 99%

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Yue

Chen

2018

Struct Control Health Monit

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“…Earthquake is the most destructive natural disaster on the earth 's land, which brings serious damage to lifeline engineering including power grid. In recent years, with the increasing activity of crustal movement, earthquakes have occurred frequently at home and abroad, causing serious damage to power facilities and electrical equipment, seriously affecting people 's daily life and national economic construction [1][2][3]. In 1999, the Chi-Chi earthquake in Taiwan caused a power outage in the north of Zhanghua.…”

Section: Introductionmentioning

confidence: 99%

Seismic analysis of 110kV capacitor bank in high altitude area

sun,

lu,

meng

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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In recent years, China 's frequent earthquakes have caused serious damage to power facilities, seriously endangering people 's property safety and social stability. As the core component of the ultra-high voltage transmission project, the ultra-high voltage substation will cause huge losses to the society and the national economy once it is destroyed in the earthquake. The increase in equipment structure size caused by high altitude further enhances the seismic vulnerability of electrical equipment in the ultra-high voltage substation. To ensure the safety of the 110kV capacitor equipment used in a highaltitude ultra-high voltage substation project during earthquakes, the seismic response of the 110kV capacitor in the ultrahigh voltage substation located in a high seismic intensity area with a horizontal acceleration of 9 degrees was calculated based on a 0.4g acceleration level, and the structural strength was reasonably determined. The analysis of 110kV capacitors mainly includes two parts: (1) capacitor modal analysis; (2) The seismic performance analysis of the capacitor structure adopts the seismic acceleration response spectrum to analyze the seismic response of the capacitor, and provides performance judgment.

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“…As one of the most important components in the electrical substation, bushings that connect the high‐voltage line and the transformer body exhibited vulnerable seismic behavior during past earthquakes . The damages or malfunctions of bushings may bring severe grid failures in large areas, and the cost of repair is significant.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of multiple annular tuned liquid dampers for seismic reduction of 1,100-kV composite bushing

Yue

Chen

2019

Struct Control Health Monit

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Summary It is of great significance to perform seismic mitigation for the 1,100‐kV composite bushings because they are vulnerable to damage during earthquakes. In this paper, a new design process of multiple tuned liquid dampers (MTLDs), utilizing the displacement transfer function curves and the equivalent mechanical model of annular tuned liquid damper (ATLD), is proposed for seismic reduction of the 1,100‐kV composite bushing. At first, the equivalent mechanical model of ATLD is derived based on the linear wave theory. The effects of the radius ratio and the liquid‐filled depth ratio on the equivalent sloshing mass are discussed. The accuracy of the equivalent mechanical model is also verified by comparing the results with those from the Housner's model and the finite element model. And then, the transfer functions of the structure with MATLD attached are formulated in the frequency domain. The parameters, including the frequency ratio, the mass ratio, and the damping ratio, that influence the transfer function curves are also investigated. Based on these transfer function curves, the new design process of MATLD is presented. Combining with the equivalent mechanical model of ATLD, a dynamic analysis of the bushing equipped with MATLD in the dome is performed under the real earthquake records. It is concluded that the MATLD performs better than the ATLD and the bushing equipped with 5ATLD in the dome is the optimal design for seismic reduction.

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Shaking Table Test on 145 kV HV Reactor Composite Bushing

Cited by 4 publications

References 5 publications

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Sloshing characteristics of annular tuned liquid damper (ATLD) for applications in composite bushings

Seismic analysis of 110kV capacitor bank in high altitude area

Optimal design of multiple annular tuned liquid dampers for seismic reduction of 1,100-kV composite bushing

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