Optimized wide area backup for distance relay tele-protection with security adjustment

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2024-10-04 DOI:10.1016/j.epsr.2024.111111

Seyed Ali Esmaeilzadeh Mousavi , Reza Mohammadi Chabanloo , Hossein Askarian Abyaneh , Hatem H․ Zeineldin

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引用次数: 0

Abstract

Tele-protection schemes efficiently clear faults at line ends, but failures in the telecommunication link or relay malfunction can cause delayed fault clearance, network instability and significant power loss. Hence, this paper presents a reliable protection method as a backup for tele-protection schemes which is designed based on nearby distance relays zone pickup. The proposed protective method introduces a novel ability to adjust sensitivity to fault events through a security factor index. This method can adapt to network uncertainties or changes in topology, using one-step calculation of optimal values based on the least square error method and provides the fast adaptation to network changes. In addition, it enables the fault detection even if a relay fails at one of the faulted line terminals. Performance evaluation of the proposed method has been done based on the reliability indices through a wide simulation of fault scenarios on the IEEE 9-bus system. Considering the possible uncertainties, the test results have shown that the proposed method is more efficient with 98.5 % dependability compared to the conventional tele-protection schemes. While this index is evaluated at 90 % and 92.5 % in the PUTT and POTT schemes, respectively.

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优化的广域备份，用于远距离中继远程保护，可进行安全调整

远动保护方案能有效清除线路末端的故障，但电信链路故障或继电器故障会导致故障清除延迟、网络不稳定和重大电力损失。因此，本文提出了一种可靠的保护方法，作为远动保护方案的后备方案。所提出的保护方法引入了一种新的能力，即通过安全系数指数来调整对故障事件的敏感性。这种方法可以适应网络的不确定性或拓扑结构的变化，使用基于最小平方误差法的一步计算最佳值，并提供对网络变化的快速适应。此外，即使故障线路终端的继电器发生故障，它也能进行故障检测。通过对 IEEE 9 总线系统故障情况的广泛模拟，根据可靠性指数对所提方法进行了性能评估。考虑到可能存在的不确定性，测试结果表明，与传统的远程保护方案相比，建议的方法更有效，可靠性达到 98.5%。而 PUTT 和 POTT 方案的这一指数分别为 90% 和 92.5%。

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

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.