Probability-based seismic resilience assessment method for substation systems

Li, Jichao; Wang, Tao; Shang, Qingxue

doi:10.1080/15732479.2020.1835998

Cited by 27 publications

(7 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another unique assessment method proposed by Shang et al 79 adopted a circuit‐like definition of hospital functionality from an engineering perspective as the ratio of the number of successful paths N ( t ) to provide medical services to patients to the number of total possible paths N total of emergency functionality in hospitals (Equations and ). The number of treatment paths was determined according to the state tree model (ST) 90,91 developed from FTs.

Q(t)=N(t)/{N}_{\mathrm{total}},

N(t)=\sum _{i=0}^{{N}_{\mathrm{total}}}i\cdot P[N=i|\mathrm{PGA}=\mathrm{pga}].

…”

Section: Resilience Assessment Methodsmentioning

confidence: 99%

Resilience assessment methods for hospitals subjected to earthquakes: State of the art

Peng

Zhai

Liu

et al. 2022

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

Hospitals play essential roles in modern communities in the lives of people. During and after earthquakes, they are supposed to be resilient and provide continued medical and social services. Resilience assessment methods are essential for determining hospitals' resilience levels, and the results will provide a direct basis and foundation for the design of new hospitals and retrofit optimization of existing hospitals. This paper reviews the resilience assessment methods and performance measures for hospitals subjected to earthquakes. Current assessment methods are divided into indicator‐ and functionality‐based categories, and the performance measures for quantifying the functionality of hospitals are classified into availability, productivity, quality, and hybrid. This study will assist stakeholders and managers in understanding available assessment methods.

show abstract

Q(t)=N(t)/{N}_{\mathrm{total}},

N(t)=\sum _{i=0}^{{N}_{\mathrm{total}}}i\cdot P[N=i|\mathrm{PGA}=\mathrm{pga}].

…”

Section: Resilience Assessment Methodsmentioning

confidence: 99%

Resilience assessment methods for hospitals subjected to earthquakes: State of the art

Peng

Zhai

Liu

et al. 2022

Earthquake Engineering and Resilience

View full text Add to dashboard Cite

show abstract

“…The seismic reliability of individual electrical equipment has received extensive attention and is often characterized by seismic fragility curves that represent the probability of exceeding a certain performance level under a given seismic intensity. 9,18,30,31 In this study, it was assumed that the fragility curve of each equipment component follows a lognormally distributed function of the peak ground acceleration (PGA) with a median value of θ and a logarithmic standard deviation of β. Corresponding parameter values were drawn from the literature 9,18,30 and listed in Table 2.…”

Section: Information Required To Assess the Resilience Of A Substationmentioning

confidence: 99%

“…17 However, the overall substation repair time was obtained by adding all the random component repair times without considering the specific layout and redundancy variations of the substations due to the computational complexity. Li et al 18 proposed a probabilistic recovery simulation model based on the state tree method, in which the uncertainty of equipment's repair time and the impact of repair resource constraints were neglected. Moreover, the redundancy level and power balance of the substation were modeled in an oversimplified way.…”

Section: Introductionmentioning

confidence: 99%

Seismic resilience assessment and improvement framework for electrical substations

Liang

Blagojević

Xie

et al. 2022

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

Experience from previous earthquakes shows that electrical substations are the most vulnerable components within the power transmission system. Thus, their disaster resilience is essential for providing electric power to communities in earthquake‐prone regions. In this study, a quantitative framework was proposed to assess the seismic resilience of electrical substations. The functionality of a substation was quantified using its maximum allowable transmission capacity that integrates the substation topology, redundancy level, line capacity, and power balance. The network model of the substation was developed to investigate how component damage affects substation's functionality. Substation's recovery was simulated as a time‐stepping process, in which at each time step the substation's ability to provide transmission capacity was conditioned on the functionality state of its components, whose recovery depends on the availability of repair crews and spare parts. The uncertainty of the resilience assessment was quantified by considering the uncertainty in the component‐level vulnerability and recoverability. The impacts of components’ robustness, repair resource constraints, and post‐earthquake recovery scheduling on substation resilience were investigated by modifying components’ seismic fragility curves, available recovery resources, and repair priorities. A case study was conducted on a real‐world 220/110 kV step‐down substation, and a parametric analysis was carried out to investigate the effect of various seismic resilience improvement strategies to demonstrate the applicability of the proposed framework in seismic disaster risk reduction and management.

show abstract

“…Compared with the current seismic isolation system, the initial seismic isolation frequency of the quasi-zero rigidity system is much lower than that of the linear system [31]. In 2018, Li Jichao carried out research on the seismic performance evaluation method of substation system based on probability, and calculated the vulnerability curves of the system under different functional requirements by using the Monte Carlo simulation method [32]. In 2020, Zhu Zhubing studied the seismic response rules of UHV converter transformer equipment, analyzed the seismic dynamic amplification effect of the equipment body on the converter transformer bushing, put forward the seismic dynamic amplification coefficient of the body, put forward the seismic isolation design principle of UHV converter transformer equipment, and established the seismic vulnerability curve of converter transformer equipment [3].…”

Section: Current Research Status In Chinamentioning

confidence: 99%

Current Status and Prospect of Seismic Research on Transformer Electrical Equipment

Zhu

Cheng

et al. 2022

Advances in Transdisciplinary Engineering

View full text Add to dashboard Cite

Earthquakes occur frequently in China. Earthquake damage data show that transformer equipment, as the core of substations (converter stations), has a high vulnerability under the seismic effect. Based on the structural features of transformer equipment, this paper discusses the current status of earthquake damage investigation and research in China and other countries, summarizes the earthquake damage modes and reasons for transformer equipment, introduces the progress of seismic research for transformer equipment in China and other countries, analyzes the role of existing technology in promoting the development of seismic technology for transformer equipment, and provides an outlook for the further research.

show abstract

Probability-based seismic resilience assessment method for substation systems

Cited by 27 publications

References 30 publications

Resilience assessment methods for hospitals subjected to earthquakes: State of the art

Resilience assessment methods for hospitals subjected to earthquakes: State of the art

Seismic resilience assessment and improvement framework for electrical substations

Current Status and Prospect of Seismic Research on Transformer Electrical Equipment

Contact Info

Product

Resources

About