Abstract The valve‐side bushing of the UHV converter transformer is key equipment in DC transmission project, and its running state directly affects security stability power system. This paper analyses attributes physical entities, uses digital twins to establish feature set proposes a zero‐sample evaluation algorithm for bushing. First, geometric, materials electrical characteristics are analy...

B. Gajdzik, The Silesian University of Technology, Faculty of Materials Science and Metallurgy, Katowice, Poland J. Sitko, The Silesian University of Technology, Faculty of Organization and Management, Zabrze, Poland The article presents the subject matter of steel mill product analysis using quality tools. The subject of quality control were bolts and a ball bushing. The Pareto chart and fault...

This paper presents bushing condition monitoring frameworks that use multi-layer perceptrons (MLP), radial basis functions (RBF) and support vector machines (SVM) classifiers. The first level of the framework determines if the bushing is faulty or not while the second level determines the type of fault. The diagnostic gases in the bushings are analyzed using the dissolve gas analysis. MLP gives...

Power transformer bushings withstand great electrical and mechanical stress during high voltage current working conditions. Sealing failure poses a threat to the long-term reliable operation of bushing power transformer; however, criterion evaluate sealing status caused by problems is still lacking. In this paper, model established gain theoretical insight into relationship between temperature ...

Abstract The transformer bushing is an important monitoring object of the substation online system. end screen current one parameters to characterize insulation state bushing, by collecting full power frequency and partial discharge pulse high-frequency domain. Based on TMR array sensing principle, this paper studies wide-band domain technology for monitoring, integrates it with ground terminal...

The reliability of the power transformer depends on performance its bushing. Transformer bushings subjected to hot conditions or high temperatures for a long period time can cause bushing failure. Bushing failure result damage such as bursting conservator tank, explosion and fire. purpose this study was determine temperature spot at Unit II Pekalongan Substation (GI) in order avoid transformer....

Abstract As con-rod is a critical component in an engine, its reliability overwhelmingly directly affects the performance of whole diesel engine. The fretting wear bushing mainly occurs on contact surface with small end and cap. In proposed study, process end, cap under maximum combustion pressure condition was analyzed, distribution friction stress analyzed. Then orthogonal simulation test des...

The insulation performance of SF6 insulated high voltage direct current apparatus are often analysed in a pure electric field or electro-thermal coupled while the fluid behaviour gas flow is ignored. However, frequent flashover along support insulators inside wall bushing indicates that characteristics may have considerable influence on interior bushing. This paper has simulated thermo-fluid ba...

Elastomers have wide and ever increasing applications in several industries. For example, elastomeric bushings are used in automotive suspension systems to reduce amplitude of vibrations as well as shocks. In this study, a compressible visco-hyperelastic approach is employed to investigate the behavior of these bushings. Time-discrete form of the material model (Exp–Ln visco-hyperelastic model)...

Abstract In order to reasonably evaluate the effectiveness of UHF sensor arrangement in online monitoring partial discharge bushing, it is necessary study electromagnetic wave propagation characteristics bushing. this paper, a three-dimensional model real transformer bushing established, XFDTD software used simulate raised seat defects and internal capacitive core field strength sensors are arr...