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All Journal Indonesian Journal of Electrical Engineering and Computer Science International Journal for Applied Information Management
Fei Li
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Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Social Sciences

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Fault-Tolerant Method for Detecting Coverage Holes of Wireless Sensor Networks Xiang-yi Chen; Fei Li; Liang-min Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 4: August 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Coverage is one of the fundamental problems in Wireless Sensor Networks (WSNs) since it is an important measure of Quality of Service (QoS) for the network’s applications. However, due to random development, power exhausting, intrusion and attacking of other malice nodes, coverage holes often appear and undermine the networks. In order to solve this problem, we present a decentralized, coordinate-free, and fault-tolerant algorithm for detecting coverage holes, which can be run on a single node. It only needs the connectivity information gathered from one-hop neighbors of the running node. During the detection process, maximal simplicial complex of the local area is required to determine whether the node is at the boundary of a hole or not. After the information of sensors around the coverage hole will be processed by the base station, and the size of coverage holes will be obtained. Simulation results show the fault tolerance of the proposed method. Meanwhile the detection accuracy, error-detection and missed-detection are compared with some related methods reported recently. The results also show that our method is effective, robust, and especially suitable for large scale networks. DOI: http://dx.doi.org/10.11591/telkomnika.v10i4.873
A Summary of Relay Protection-based Simulation for Dynamic Performance and Reliability Assessment Li, Fei; Zhuyuan, Luochen
International Journal for Applied Information Management Vol. 3 No. 1 (2023): Regular Issue: April 2023
Publisher : Bright Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/ijaim.v3i1.46

Abstract

As technology advances, electricity has become an essential aspect of both national security and daily life. Ensuring the safety of the power grid is thus of utmost importance. However, in China, research on relay protection models for dynamic simulation of power systems is still in its early stages. Due to this, the control laws of relay protection elements have not been well understood, leading to inadequate handling of system failures. To ensure the safe operation of power systems, it is crucial to first strengthen the grid structure of the power system. This can be achieved through the improvement of elasticity coefficient, reasonable distribution of reserve capacity, and the reinforcement of the adjustment ability of the tie line between major power grids. Additionally, improving the stable reserve of the power grid is essential. To improve the authenticity and reliability of dynamic simulation, it is necessary to establish a set of relay protection models that are consistent with actual relay protection. By doing so, the stability problem in the power system can be accurately analyzed, leading to improved reliability. In this study, a relay protection model was established that reduces the complexity of modeling and can accurately reflect the dynamic characteristics of the power system following interference. This model is significant to the analysis and research of power systems, as it can enhance the understanding of control laws for relay protection elements, leading to improved management of system failures and better overall reliability.
Co-Authors Liang-min Wang Xiang-yi Chen Zhuyuan, Luochen