在不同土壤电阻率条件下利用屏蔽和接地设计优化配电系统可靠性

IF 0.6 Q3 MULTIDISCIPLINARY SCIENCES
Jia-Wen Tang, C. Wooi, Wen-Shan Tan, Hadi Nabipour Afrouzi, Hana Abdull Halim, Syahrun Nizam Md Arshad
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引用次数: 0

摘要

雷击可造成设备损坏和停电,因此配电系统抵御雷击的可靠性至关重要。本研究论文提出了一个模型,旨在优化配电系统中防雷系统(LPS)的配置,最大限度地降低系统平均中断频率指数(SAIFI)(衡量可靠性的指标)和相关的成本投资。所提出的雷电电磁暂态模型考虑了馈线屏蔽、接地设计和土壤类型等影响临界电流、闪络率、SAIFI 和成本的 LPS 因素。本文采用元启发式算法 PSOGSA 来获得最优解。本文的主要贡献在于探讨了接地方案和土壤电阻率对 SAIFI 的影响。在电阻率为 10 Ωm 的土壤下直线布置 4 根接地棒可降低接地电阻,并将 SAIFI 从 3.783 int./yr(无 LPS)降至 0.146 int./yr。非屏蔽 LPS 对土壤电阻率的临界电流没有显著影响。考虑了四种不同投资成本的测试案例,并进行了数值模拟。屏蔽式 LPS 对接地拓扑和土壤电阻率更为敏感,其中投资较高的 10 Ωm 土壤电阻率的 SAIFI 降低幅度最大,为 73.34%。相比之下,1 kΩm 和 10 kΩm 土壤电阻率的 SAIFI 与无 LPS 的 SAIFI 相比,下降幅度较小。该研究强调了在为配电系统选择最佳 LPS 配置时考虑土壤电阻率和投资成本的重要性,以及选择 LPS 对减少客户中断的重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimisation of the Distribution System Reliability with Shielding and Grounding Design Under Various Soil Resistivities
Lightning strikes can cause equipment damage and power outages, so the distribution system's reliability in withstanding lightning strikes is crucial. This research paper presents a model that aims to optimise the configuration of a lightning protection system (LPS) in the power distribution system and minimise the System Average Interruption Frequency Index (SAIFI), a measure of reliability, and the associated cost investment. The proposed lightning electromagnetic transient model considers LPS factors such as feeder shielding, grounding design, and soil types, which affect critical current, flashover rates, SAIFI, and cost. A metaheuristic algorithm, PSOGSA, is used to obtain the optimal solution. The paper's main contribution is exploring grounding schemes and soil resistivity's impact on SAIFI. Using 4 grounding rods arranged in a straight line under the soil with 10 Ωm resistivity reduces grounding resistance and decreases SAIFI from 3.783 int./yr (no LPS) to 0.146 int./yr. Unshielded LPS has no significant effect on critical current for soil resistivity. Four test cases with different cost investments are considered, and numerical simulations are conducted. Shielded LPSs are more sensitive to grounding topologies and soil resistivities, wherein higher investment, with 10 Ωm soil resistivity, SAIFI decreases the most by 73.34%. In contrast, SAIFIs for 1 kΩm and 10 kΩm soil resistivities show minor decreases compared to SAIFIs with no LPS. The study emphasises the importance of considering soil resistivity and investment cost when selecting the optimal LPS configuration for distribution systems, as well as the significance of LPS selection in reducing interruptions to customers.
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来源期刊
Pertanika Journal of Science and Technology
Pertanika Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
1.50
自引率
16.70%
发文量
178
期刊介绍: Pertanika Journal of Science and Technology aims to provide a forum for high quality research related to science and engineering research. Areas relevant to the scope of the journal include: bioinformatics, bioscience, biotechnology and bio-molecular sciences, chemistry, computer science, ecology, engineering, engineering design, environmental control and management, mathematics and statistics, medicine and health sciences, nanotechnology, physics, safety and emergency management, and related fields of study.
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