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reliability of Substation Protection System Based on IEC61850

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Transactions of Tianjin University 2008年第2期14卷 118-122页

作者：熊小伏于军刘晓放沈智健 State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China

Although the new technology of protection and automation system of substation based on IEC61850 standard has developed rapidly in China,reliability measures depending on this technology need to be further *** taking advantage of convenient information sharing,two kinds of new schemes,shared backup protection unit(SBPU)and signal backup(SB),have been proposed to solve the failure problem of protective devices and current/voltage transducers respectively,and the working principle of these two schemes are also ***,the key technologies of on-line diagnosis of protective devices'failure and on-line status diagnosis of optical or electronic current/voltage transducers to realize the two schemes are proposed.

关键词： IEC61850 reliability measures shared backup protection unit (SBPU) signal backup

Quantile Version of Mathai-Haubold Entropy of Order Statistics

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Computer Modeling in Engineering & Sciences 2021年第9期128卷 907-925页

作者： Ibrahim M.Almanjahie Javid Gani Dar Amer Ibrahim Al-Omari Aijaz Mir Department of Mathematics College of ScienceKing Khalid UniversityAbha62529Saudi Arabia Statistical Research and Studies Support Unit King Khalid UniversityAbha62529Saudi Arabia Department of Mathematical Sciences IUSTKashmir192231India Department of Mathematics Faculty of ScienceAl al-Bayt UniversityMafraq25113Jordan Department of Mathematics Govt.Degree College KilamHigher EducationJ&K192231India

Many researchers measure the uncertainty of a random variable using quantile-based entropy *** techniques are useful in engineering applications and have some exceptional characteristics than their distribution function *** order statistics,the key focus of this article is to propose new quantile-based Mathai-Haubold entropy and investigate its *** divergence measure of theMathai-Haubold is also considered and some of its properties are ***,based on order statistics,we propose the residual entropy of the quantile-based Mathai-Haubold and some of its property results are *** performance of the proposed quantile-based Mathai-Haubold entropy is investigated by simulation ***,a real data application is used to compare our proposed quantile-based entropy to the existing quantile *** results reveal the outperformance of our proposed entropy to the other entropies.

关键词： Shannon entropy Mathai-Haubold entropy quantile function residual entropy order statistics failure time reliability measures

Analysis of a multi-component system with double threshold control policy

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Journal of Control and Decision 2021年第3期8卷 343-352页

作者： Wenqing Wu Gang He Wenxin Yu Mengxin Wang Kang Xu School of Science Southwest University of Science and TechnologyMianyangPeople’s Republic of China Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal UniversityChengduPeople’s Republic of China School of Computer Science and Technology Southwest University of Science and TechnologyMianyangPeople’s Republic of China Zhongtai Securities Institute of Financial Studies Shandong UniversityShandongPeople’s Republic of China

This paper investigates a multi-component repairable system with double threshold control *** system is composed of n identical and independent components which operate simultaneously at the beginning,and it is down when the number of operating components decreases to k−1(k≤n).When the number of failed components is less than the value L,the repairman repairs them with a low repair *** high repair rate is activated as soon as L failed components present,and continues until the number of failed components drops to the value N−*** the matrix analytical method,the Laplace transform technique and the properties of the phase type distribution,various performance measures including the availability,the rate of occurrence of failures,and the reliability are derived in transient and stationary ***,numerical examples are reported to show the behaviour of the system.

关键词： Multi-component system double threshold control policy matrix analytical method reliability measures

Analysis of an k-out-of-n:G system with redundant dependency and repair equipment procurement

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Journal of Control and Decision 2021年第4期8卷 403-414页

作者： Wenqing Wu Kai Zuo Yinghui Tang Yuanyuan Zhang School of Science Southwest University of Science and TechnologyMianyangPeople’s Republic of China School of Mathematical Sciences Sichuan Normal UniversityChengduPeople’s Republic of China Visual Computing and Virtual Reality Key Laboratory of Sichuan Province Sichuan Normal UniversityChengduPeople’s Republic of China School of Mathematics Chengdu Normal UniversityChengdu 611130People’s Republic of China

This paper studies an k-out-of-n:G system with redundant dependency and repair equipment procurement lead time where the operating times and repair times of components follow exponential distributions and phase-type distributions,*** one component breaks down,it is repaired by a repair *** repair equipment may fail during the repair period and the following repair is not‘as good as new’.After a number of repairs,it is replaced by a new *** new spare repair equipment for replacement is only available by an order,and the procurement lead time for delivering follows a phase-type ***,in the multi-component system,the redundant dependency is taken into *** the matrix-analytical method,the system availability,the rate of occurrence of failures of the system,the expected number of broken components,the availability and the rate of occurrence of failures of the repair equipment are ***,numerical examples are given to show these theoretical results.

关键词： k-out-of-n:G system redundant dependency procurement lead time matrix-analytical method reliability measures