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Fault indicator

About: Fault indicator is a research topic. Over the lifetime, 10057 publications have been published within this topic receiving 143482 citations. The topic is also known as: FCI & power line fault indicator.


Papers
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Journal ArticleDOI
TL;DR: This paper applies the particle swarm optimization-based variational mode decomposition to decompose the raw vibration signals into a series of intrinsic modes, and selects ten time-domain indicators and five frequency-domain statistical characteristics for feature extraction.
Abstract: The data-driven fault indicator for rotating machinery is designed to reveal the possible fault scenarios from the observed statistical vibration signals. This study develops a novel ensemble extreme learning machine (EELM) network to replace the conventional layout by combining binary classifiers (e.g., binary relevance) for compound-fault diagnosis of rotating machinery. The proposed EELMs consist of two sub-networks, namely, the first extreme learning machine (ELM) for clustering, and the second for multi-label classification. The first network generates the Euclidean distance representations from each point to every centroid with unsupervised clustering, and the second identifies potential output tags through multiple-output-node multi-label learning. Compared to the existing multi-label classifiers (e.g., multi-label radial basis function, rank support vector machine, back-propagation multi-label learning, and binary classifiers with binary relevance), the theoretical verification reveals EELMs perform the best in hamming loss, one-error, training time, and achieves the best overall evaluation for the two real-world databases (e.g., Yeast and Image). Regarding the real test for the compound-fault diagnosis of rotating machinery, this paper applies the particle swarm optimization-based variational mode decomposition to decompose the raw vibration signals into a series of intrinsic modes, and selects ten time-domain indicators and five frequency-domain statistical characteristics for feature extraction. The experimental results illustrate that the EELM-based fault diagnosis method achieves the best overall performance.

53 citations

Patent
11 Sep 2006
TL;DR: In this paper, the authors proposed a method for locating a fault in a two-terminal power transmission or distribution line comprises the steps of receiving measurements of the three phase currents from both terminals, receiving measurements from one line terminal, receiving parameters of the line and receiving the fault type, based on this information the distance to fault from the one terminal where the phase voltages were measured and output.
Abstract: A method for locating a fault in a two-terminal power transmission or distribution line comprises the steps of receiving measurements of the three phase currents from both terminals, receiving measurements of the three phase voltages from one line terminal, receiving parameters of the line and receiving the fault type. Based on this information the distance to fault from the one terminal where the phase voltages were measured is determined and output. Since only the phase voltages of one line terminal are needed, the functionality of a device, in particular a current 15 differential relay, can be expanded to determine the distance to fault in an off-line mode.

53 citations

Proceedings ArticleDOI
16 Jun 2010
TL;DR: In this article, an adaptive fault current protection algorithm for inverter-based micro-grids is proposed, based on the fault characteristic of inverter interfaced DG, which uses fault component current which only presents in fault condition.
Abstract: The fault characteristic of inverter interfaced DG is very different from that of synchronous rotating generators. Traditional protection methods based on large fault current are no longer applicable to inverter-only supplied microgrid. This paper analyzes the fault behaviour of inverter based microgrid, and proposes an adaptive fault current protection algorithm for this type of microgrid. According to the fault characteristic of inverter interfaced DG, it uses fault component current which only presents in fault condition. The result is simulated and proved by DigSilent.

53 citations

Journal ArticleDOI
TL;DR: In this paper, the authors proposed a method for detecting and locating a multicycle incipient fault in a cable, which is modeled as a self-clearing arcing fault and the degree of match between the measured and calculated waveforms is used to guide the fault distance.
Abstract: Early and accurate detection of incipient cable faults is of a great interest to the utility industry. Such faults can be classified into subcycle and multicycle types. Although a lot of research has been conducted on subcycle types of faults, little work has been done for multicycle types of faults. This paper proposes a novel method for detecting and locating a multicycle incipient fault in a cable. The incipient fault is modeled as a self-clearing arcing fault. The distortion degree of calculated voltage is used to detect the occurrence of an incipient fault. The degree of match between the measured and calculated waveforms is used to guide the search for the fault distance. The accuracy is further improved by taking into account the incipient fault angle as seen in the voltage waveform and the power loss characteristics. The proposed method has been verified by PSCAD/EMTDC simulations. Lab experiments are also conducted to further validate the proposed detection method.

52 citations

Proceedings ArticleDOI
Zhuo Li1, Xiang Lu1, Wangqi Qiu1, Weiping Shi1, Duncan M. Walker1 
27 Apr 2003
TL;DR: A circuit level model for resistive open and bridge faults and a general resistive bridge delay calculation method are proposed, which are practical and easy to use.
Abstract: Delay faults are an increasingly important test challenge. Traditional open and bridge fault models are incomplete because only the functional fault or a subset of delay fault are modeled. In this paper, we propose a circuit level model for resistive open and bridge faults. All possible fault behaviors are illustrated and a general resistive bridge delay calculation method is proposed. The new models are practical and easy to use. Fault simulation results show that the new models help the delay test to catch more bridge faults.

52 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202381
2022215
202127
202061
2019116
2018160