配电系统可靠性评估及合闸和分离器的可能缓解:以Cotobie配电站为例

Seada Hussen, K. Ibrahim
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引用次数: 0

摘要

—配电系统可靠性评估涉及每个客户服务入口供电的可用性和质量。本文重点对亚的斯亚贝巴市由Cotebie配电变电站连接的配电可靠性进行了评估,并探讨了采用智能合闸和断开器来缓解紧急和紧迫的停电问题的可能性。根据评估结果,Cotebie配电所的平均中断频率为133.37次/年,平均中断时间为187.31小时/年。该值表明变电站存在较大的可靠性问题,变电站不符合埃塞俄比亚电力局(EEA)规定的监管机构的要求。本文将可靠性提高到每客户平均中断频率为22.27次/年,平均中断时长为31.274小时/年。根据分段和重合闸数量的不同,它也可以提高到这个值以上。利用windmill软件对设计的系统进行了仿真,分析了整个系统的可靠性。仿真结果表明,采用智能合闸与隔离器配合,可将系统可靠性从50%提高到83.3%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of Distribution System Reliability and Possible Mitigation by Using Reclosers and Disconnectors: The Case of Cotobie Distribution Station
- The distribution system reliability assessment deals with availability and quality of power supply at each customer service entrance. This paper focuses the assessment of power distribution reliability of Addis Ababa city which is connected from Cotebie distribution substation and the possibility of using smart reclosers and disconnectors to mitigate the urgent and pressing power interruption problems. Depending of the assessment result Cotebie distribution substation has reliability indices such as average frequency of interruption is 133.37 interruptions per year per customer and the average interruption duration is 187.31 hours per year per customer. This value shows the substation has greater reliability problems and the substation does not meet the requirements set by the regulatory body that is Ethiopian Electric Authority (EEA). In this paper, the reliability is improved in to 22.27 interruptions per year per customer average frequency of interruption and the average interruption duration is 31.274 hours per year per customer. It can also improve above this value depending of the segment and recloser number. The designed system is simulated using WindMil software that is used to analyze the reliability of the overall system. The simulation of the designed model shows that the application of smart reclosers and disconnector coordination can improve the reliability from 50% up to 83.3%.
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