A Risk-Based Framework to Improve a Distribution System’s Resilience against Earthquakes
Publication: Journal of Energy Engineering
Volume 149, Issue 1
Abstract
Earthquakes and other natural disasters have caused significant damages to power systems, indicating the necessity to enhance power system resilience. This paper proposes a risk-based resilience enhancement framework against earthquakes that considers their stochastic nature. The proposed framework supports the decision-making of distribution system operators (DSOs) for retrofitting substation components and underground cables to enhance distribution system resilience. The framework consists of four phases, namely earthquake modeling, vulnerability assessment, risk assessment, and resilience enhancement. An attenuation relationship is used to model the earthquake characteristics. Vulnerability assessment includes the failure probability calculation of substation components and a fault-tree method application to examine the seismic vulnerability of the substation. Conditional value at risk (CVaR) is used to assess the seismic risk, and includes the estimation of repair cost and customer interruption cost due to the damage caused by the earthquake, as well as the power generation cost of the distributed energy resources (DERs) used to meet the demand locally. A modified risk reduction worth (RRW) metric is adopted to determine the optimal retrofitting strategy to enhance resilience. The proposed framework was applied to a real distribution substation to examine the effectiveness of substation component retrofitting for resilience enhancement.
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Data Availability Statement
Some data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request, including historic earthquake data of Fars Province, fragility curve data of substation components and retrofitted substation components, and MATLAB code for generating earthquake scenarios.
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Information & Authors
Information
Published In
Journal of Energy Engineering
Volume 149 • Issue 1 • February 2023
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 5, 2022
Accepted: Aug 31, 2022
Published online: Nov 1, 2022
Published in print: Feb 1, 2023
Discussion open until: Apr 1, 2023
ASCE Technical Topics:
- Benefit cost ratios
- Business management
- Cables
- Construction engineering
- Construction methods
- Disaster risk management
- Earthquake engineering
- Earthquakes
- Electric power
- Energy engineering
- Energy infrastructure
- Engineering fundamentals
- Equipment and machinery
- Financial management
- Geohazards
- Geotechnical engineering
- Infrastructure
- Lifeline systems
- Power transmission
- Power transmission substations
- Practice and Profession
- Rehabilitation
- Risk management
- Seismic effects
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