Reliability analysis for vertical integration of protection, measurement, merge unit, and intelligent terminal device

IF 1.9 Q4 ENERGY & FUELS Global Energy Interconnection Pub Date : 2023-12-01 DOI:10.1016/j.gloei.2023.11.010
Ying Li , Weiquan Wang , Liang Zhang , Zhujian Liang , Zhenli Xu , Yuansheng Liang
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Abstract

The reliability analysis of vertically integrated protection devices is crucial for designing International Electrotechnical Commission (IEC) 61850-based substations. This paper presents the hardware architecture of a four-in- one vertically integrated device and the information transmission path of each function based on the functional information transmission chain of protection devices, measurement and control devices, merging units, and intelligent terminals. Additionally, a reliability analysis model of the protection device and its protection system is constructed using the fault tree analysis method while considering the characteristics of each module of the vertically integrated device. The stability probability of the protection system in each state is analyzed by combining the state-transfer equations of line and busbar protection with a Markov chain. Finally, the failure rate and availability of the protection device and its protection system are calculated under different ambient temperatures using a 110 kV intelligent substation as an example. The sensitivity of each device module is analyzed.

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保护、测量、合并单元和智能终端设备垂直整合的可靠性分析
垂直一体化保护装置的可靠性分析对于设计基于国际电工委员会(IEC)61850 的变电站至关重要。本文基于保护装置、测控装置、合并单元和智能终端的功能信息传输链,介绍了四合一垂直一体化装置的硬件架构和各功能的信息传输路径。此外,考虑到垂直一体化装置各模块的特点,采用故障树分析方法构建了保护装置及其保护系统的可靠性分析模型。通过将线路和母线保护的状态转移方程与马尔可夫链相结合,分析了保护系统在各状态下的稳定概率。最后,以 110 kV 智能变电站为例,计算了不同环境温度下保护装置及其保护系统的故障率和可用性。分析了每个设备模块的灵敏度。
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来源期刊
Global Energy Interconnection
Global Energy Interconnection Engineering-Automotive Engineering
CiteScore
5.70
自引率
0.00%
发文量
985
审稿时长
15 weeks
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