This paper presents a new methodology for fault diagnosis, based on the natural hierarchy of components and sub-components in electrical and/or mechanical systems. In the first section, the advantages of hierarchically decomposing learning tasks are discussed. In the second section, the author’s fault diagnosis system, DE/ IFT, is introduced. The underlying algorithm, the training cycle and the...

Generation, transmission and distribution of electric energy are to be characterized by a very high degree of reliability. Reliability level is directly related to the quality of the equipment used and the periodic maintenance carried out on the system. In our country, the distribution system is the most neglected part, which is being given some importance only in the recent years. Distribution...

Modeling and fault diagnosis of a photovoltaic system Kuei-Hsiang Chao a,∗, Sheng-Han Ho b, Meng-Hui Wang a a Department of Electrical Engineering, National Chin-Yi University of Technology, 35, Lane 215, Section 1, Chung-Shan Road, Taiping City 411, Taichung County, Taiwan, ROC b Institute of Information and Electrical Energy, National Chin-Yi University of Technology, 35, Lane 215, Section 1,...

Nowadays, according to the liberalization and development of Romanian energy market, asset management in energy industry require a new approach, because the assets of electrical companies need a specific maintenance strategy for all electrical equipment and also involve the decision-making process about the company assets. This paper present the time evolution of the maintenance strategies, the...

Transformer is the main important equipment in electrical power system. Early stage detection of the transformer faults has great economic significance because it considered expensive equipment and it helps to maintain the continuous operation of the electrical power system. Transformer oil is used for two main purposes, one for insulating liquid and the other for cooling. Some physicalchemical...

ion links and index linksThe classes may form a structured hierarchy, in which the different levelscorrespond to the level of detail of the case descriptions. Riesbeck and Schank[5] distinguish two types of link between classes and their specializations:abstraction links and index links. A subclass connected by an abstraction linkprovides additional detail to its superclass,...

Physarum polycephalum is a macroscopic single celled plasmodial slime mould. We employ plasmodial phototactic responses to construct laboratory prototypes of NOT and NAND logical gates with electrical inputs/outputs and optical coupling; the slime mould plays dual roles of computing device and electrical conductor. Slime mould logical gates are fault tolerant and resettable. The results present...

A reliable and accurate diagnosis of inter-turn short circuit faults is a challenging problem in the area of fault diagnosis of electrical machines. The purpose of this challenge is to be more efficient in fault detection and to provide a reliable method with low-cost sensors and simple numerical algorithms which not only detect the occurrence of the fault, but also locate its position in the w...

Electro-hydraulic systems with regards to the their specific features and applications among other industrial systems including mechanical, electrical and pneumatic systems, have been widely taken into consideration by the scientists and researchers. Due to the fact that the electro-hydraulic system is inherently a nonlinear system, has some problems such as signals saturation, nonlinear effici...