BN-based seismic risk analysis and mitigation strategy for UHV converter station

IF 4.3 2区 工程技术 Q1 ENGINEERING, CIVIL
Siyuan Wu, Xiao Liu, Junhan Chen, Qiang Xie
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引用次数: 0

Abstract

Ultra-high voltage (UHV) converter stations are critical nodes in power grids. This paper proposes a probabilistic framework for assessing and mitigating the seismic risk of UHV converter station systems to enhance the seismic performance of the grid. First, a Bayesian network model for the system functionality of UHV converter stations was established based on the enumeration of equipment failure scenarios. Conditional probability tables (CPTs) were used to represent the causal relationship among subsystems and system functionality. Inference calculations were conducted using Bayes’ theorem. Then, the definition of system seismic loss risk distribution was proposed to assess the seismic risk of the system over its entire lifespan. The feasibility of this framework was validated using a specific UHV converter station, yielding analytical solutions for the probability distribution of system functionality and seismic vulnerability curves. Additionally, the cost-effectiveness of several risk mitigation strategies was assessed. A cost-benefit analysis was performed from the perspectives of both the expected loss of a single earthquake and the life-cycle cost. The framework comprehensively considered the constraints imposed by series, parallel, and bypass control devices on the system's functionality. It was revealed that the seismic loss risk for UHV converter stations exhibits a characteristic of low probability but high loss.

基于 BN 的特高压换流站地震风险分析与缓解策略
特高压(UHV)换流站是电网的关键节点。本文提出了一种概率框架,用于评估和减轻特高压换流站系统的地震风险,以提高电网的抗震性能。首先,在列举设备故障情况的基础上,建立了特高压换流站系统功能的贝叶斯网络模型。使用条件概率表(CPT)来表示子系统和系统功能之间的因果关系。使用贝叶斯定理进行推理计算。然后,提出了系统地震损失风险分布的定义,以评估系统在整个生命周期内的地震风险。利用一个特定的超高压换流站验证了这一框架的可行性,得出了系统功能概率分布和地震脆弱性曲线的分析解决方案。此外,还对几种风险缓解策略的成本效益进行了评估。从单次地震的预期损失和生命周期成本两个角度进行了成本效益分析。该框架全面考虑了串联、并联和旁路控制装置对系统功能的限制。结果表明,特高压换流站的地震损失风险呈现出低概率、高损失的特点。
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来源期刊
Earthquake Engineering & Structural Dynamics
Earthquake Engineering & Structural Dynamics 工程技术-工程:地质
CiteScore
7.20
自引率
13.30%
发文量
180
审稿时长
4.8 months
期刊介绍: Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.
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