Abstract
Based on the actual damage data of high-voltage electrical equipment in electric substations in the Wenchuan earthquake, this paper uses the cumulative Gaussian distribution function to describe the relationship between the damage rate of high-voltage electrical equipment and the instrumental seismic intensity. The instrumental seismic intensity at strong motion observation stations in the Wenchuan earthquake is calculated, and the Kriging interpolation method is used to estimate the instrumental seismic intensity at 110 kV and above voltage level substations in Mianyang, Deyang, Guangyuan, and Chengdu of Sichuan Province. A cumulative Gaussian distribution function is then used to fit the damage rate-instrumental seismic intensity relationship curve for six types of high-voltage electrical equipment such as the transformer, circuit breaker, voltage mutual inductor, current mutual inductor, isolating switch, and lightning arrester. The results show that transformers have the highest vulnerability during earthquakes, and they suffered a certain level of damage even under low instrumental intensity. The second most vulnerable equipment is the circuit breaker, followed by the lightning arrester, transformer, and isolating switch, which share a similar vulnerability curve.
Highlights
Numerous earthquakes at home and abroad have caused serious damage to high-voltage electrical equipment in the transformer substations which resulted in the failure of power grid function in the affected areas and caused great difficulties for postevent emergency rescue efforts, the lives of the affected people, and the resettlement efforts after the disaster
Advances in Civil Engineering widely used in postdisaster assessment for electrical power system [5]. e Applied Technology Council (ATC) in the US provided seismic vulnerability curves for various lifelines, which were used in the seismic risk analysis system by Federal Emergency Management Agency (FEMA) [6, 7]
A few scholars in China have studied the seismic vulnerability of substation electrical equipment with oil-immersed high-voltage transformer connected to the pipe busbar [8, 9]; He et al provided seismic vulnerability curves of transformers, busbars, and power transmission towers based on seismic damage data [10]; Liu et al used the Weibull distribution function to fit the seismic vulnerability curves of electric porcelain electrical equipment [11]; Yang studied the relationships between the damage probability of various high-voltage electrical equipment with the peak ground acceleration and acceleration response spectrum and analyzed the functional failure modes of transformer substations under different peak ground accelerations [12]
Summary
Numerous earthquakes at home and abroad have caused serious damage to high-voltage electrical equipment in the transformer substations which resulted in the failure of power grid function in the affected areas and caused great difficulties for postevent emergency rescue efforts, the lives of the affected people, and the resettlement efforts after the disaster. Research on the vulnerability of high-voltage electrical equipment in the transformer substations is of great significance for improving the seismic performance of electrical equipment, assessing the damage and functional failure of power facilities and speeding up emergency repair efforts after an earthquake. Rapid assessment of seismic disaster based on instrumental seismic intensity meets the urgent need for postearthquake emergency response and rescue as well as engineering repair efforts. E research on the vulnerability of high-voltage electrical equipment based on instrumental seismic intensity is the basis of rapid seismic disaster assessment of power facilities Rapid assessment of seismic disaster based on instrumental seismic intensity meets the urgent need for postearthquake emergency response and rescue as well as engineering repair efforts. e research on the vulnerability of high-voltage electrical equipment based on instrumental seismic intensity is the basis of rapid seismic disaster assessment of power facilities
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
