Analytical Calculation Method for Power Supply Reliability of Distribution Systems With Multiple Tie Lines

IF 5.7 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Transactions on Reliability Pub Date : 2025-02-03 DOI:10.1109/TR.2025.3530983

Fengzhang Luo;Nan Ge;Jing Xu

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引用次数: 0

Abstract

The existing methods for distribution system reliability assessment mainly adopt the multiple iteration calculation modes of traversal search of failure scenarios one by one to get the failure effect area and degree. However, these methods are time-consuming and low-efficiency, due to the repeated searches and the complexity of failure effect analysis. Meanwhile, the reliability assessment results only representing the system's average level always cannot provide weak link information for the operators. In this article, an analytical calculation method for distribution system reliability index based on the improved failure effect incidence matrix (FEIM) is proposed. First, an incidence matrix-based modeling of the complete topological association of source-network-load of the distribution system is conducted, including node-branch relationships, segment switch's locations, and fuse locations, which are closely related to reliability analysis. And the rules for calculating the source-load power supply association matrix are also provided. Next, an improved FEIM model is established to analytically express the correlation between failure components and affected loads. Finally, the distribution system reliability index analytical calculation method based on the improved FEIM is presented. The proposed method is validated using the IEEE RBTS bus-6 case and a modified 96-node case. The results demonstrate that the method can significantly improve the computation efficiency while ensuring the accuracy of the results. Additionally, it can conveniently provide more efficient information on system bottlenecks and weak points for the reliability improvement of distribution systems.

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多支路配电系统供电可靠性的解析计算方法

现有的配电系统可靠性评估方法主要采用逐个遍历搜索故障场景的多重迭代计算模式，得到故障影响范围和程度。然而，这些方法由于需要重复搜索和失效效应分析的复杂性，耗时长，效率低。同时，仅代表系统平均水平的可靠性评估结果往往不能为操作者提供薄弱环节信息。本文提出了一种基于改进故障效应关联矩阵（FEIM）的配电系统可靠性指标解析计算方法。首先，建立了基于关联矩阵的配电系统源网负荷完整拓扑关联模型，包括与可靠性分析密切相关的节点-分支关系、分段开关位置和熔断器位置。并给出了源-负载电源关联矩阵的计算规则。其次，建立了改进的有限元模型，解析表达了失效构件与受影响载荷之间的相关性。最后，提出了基于改进有限元法的配电系统可靠性指标分析计算方法。采用IEEE RBTS总线-6和改进的96节点情况对该方法进行了验证。结果表明，该方法在保证计算结果准确性的前提下，显著提高了计算效率。此外，它还可以方便地为配电系统的可靠性改进提供更有效的系统瓶颈和弱点信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Reliability 工程技术-工程：电子与电气

CiteScore

12.20

自引率

8.50%

发文量

153

审稿时长

7.5 months

期刊介绍： IEEE Transactions on Reliability is a refereed journal for the reliability and allied disciplines including, but not limited to, maintainability, physics of failure, life testing, prognostics, design and manufacture for reliability, reliability for systems of systems, network availability, mission success, warranty, safety, and various measures of effectiveness. Topics eligible for publication range from hardware to software, from materials to systems, from consumer and industrial devices to manufacturing plants, from individual items to networks, from techniques for making things better to ways of predicting and measuring behavior in the field. As an engineering subject that supports new and existing technologies, we constantly expand into new areas of the assurance sciences.