Journal ArticleDOI
A comprehensive protection scheme for micro-grid using fuzzy rule base approach
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In this paper, a comprehensive primary and backup protection scheme for micro-grid using fuzzy rule base approach is presented, which starts with preprocessing of the retrieved current and voltage signals at both ends of the faulted feeder and adjacent feeder to compute the differential features.Abstract:
The paper presents a comprehensive primary and backup protection scheme for micro-grid using fuzzy rule base approach. The proposed scheme starts with pre-processing of the retrieved current and voltage signals at both ends of the faulted feeder and adjacent feeder to compute the differential features. The differential features are used to build two separate decision trees (DTs) for the primary and backup protection. The differential features between immediate buses of faulted feeder are considered for primary protection and differential features between far end buses of faulted and adjacent feeders are used to build decision tree for secondary protection. From the developed decision tree classification boundaries, the fuzzy membership functions are generated and the corresponding fuzzy rule base is formulated for final relaying decision. The proposed scheme is tested for numbers of fault and no fault events simulated in the studied micro-grid with wide variations in system parameters and fault parameters in different operating mode. The extensive test results show the efficacy of the proposed protection scheme to provide a reliable protection measure to both primary and backup protection of micro-grid.read more
Citations
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Journal ArticleDOI
Detection and classification of micro-grid faults based on HHT and machine learning techniques
Manohar Mishra,Pravat Kumar Rout +1 more
TL;DR: This study presents a novel micro-grid protection scheme based on Hilbert-Huang transform (HHT) and machine learning techniques, which proves the effectiveness and reliability of the proposed micro- grid protection scheme.
Journal ArticleDOI
A novel constraint and non‐standard characteristics for optimal over‐current relays coordination to enhance microgrid protection scheme
TL;DR: This study investigates the influence of excessive fault current due to DG penetration on conventional IEC characteristics and the genetic algorithm is employed to investigate the effectiveness of the two proposed approaches to the conventional optimisation techniques in different operational modes.
Journal ArticleDOI
Adaptive protection scheme for microgrids based on SOM clustering technique
TL;DR: A new adaptive protection coordination scheme based on Self-Organizing Map (SOM) clustering algorithm is proposed for digital overcurrent relays equipped with several setting groups that can significantly improve the mis-coordination of overcurrent relay pairs, but it can also ameliorate the operating time of relay.
Journal ArticleDOI
A combined mathematical morphology and extreme learning machine techniques based approach to micro-grid protection
TL;DR: A smart differential protection scheme for a microgrid system using a nonlinear signal transformation named as ‘mathematical morphology (MM)’ is introduced and the experimental outcomes confirm the efficiency and reliability of the offered microgrid protection scheme (MPS) in diverse operating condition.
Journal ArticleDOI
Fast discrete s-transform and extreme learning machine based approach to islanding detection in grid-connected distributed generation
Manohar Mishra,Pravat Kumar Rout +1 more
TL;DR: An approach for islanding detection in distributed generation systems (DGs) using fast discrete s-transform algorithm and bidirectional extreme learning machine (BELM) classifier to discriminate islanding and non-islanding events, under various operating conditions of distribution system is presented.
References
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Induction of fuzzy decision trees
Yufei Yuan,Michael J. Shaw +1 more
TL;DR: A fuzzy decision tree induction method, which is based on the reduction of classification ambiguity with fuzzy evidence, is developed, which represents classification knowledge more naturally to the way of human thinking and are more robust in tolerating imprecise, conflict, and missing information.
Journal ArticleDOI
Development of adaptive protection scheme for distribution systems with high penetration of distributed generation
Sukumar Brahma,A.A. Girgis +1 more
TL;DR: In this paper, the effect of high DG penetration on protective device coordination is explored and an adaptive protection scheme is proposed as a solution to the problems identified, which is implemented on a simulated actual distribution feeder.
Journal ArticleDOI
Microgrid Protection Using Communication-Assisted Digital Relays
TL;DR: In this article, a protection scheme using digital relays with a communication network is proposed for the protection of the microgrid system and the increased reliability of adding an additional line to form a loop structure is explored.
Proceedings ArticleDOI
Effect of distributed generation on protective device coordination in distribution system
A.A. Girgis,Sukumar Brahma +1 more
TL;DR: The effect of DG on protective device coordination such as fuse-fuse, fuse-recloser and relay-relay is explored, finding some margins in which the coordination may hold and certain cases, where no margin is available.
Journal ArticleDOI
A Simple Adaptive Overcurrent Protection of Distribution Systems With Distributed Generation
TL;DR: The use of adaptive protection, using local information, is proposed to overcome the challenges of the overcurrent protection in distribution systems with distributed generation.