In this paper a prediction model is proposed for estimation of furan content in transformer oil using quality parameters and dissolved gases as inputs. Multi-layer perceptron feed forward neural networks were used to the relationships between various content. Seven parameters, which are breakdown voltage, water content, acidity, total combustible hydrocarbon hydrogen, gases, carbon monoxide dioxide concentrations, be predictors oil. The chosen based on physical nature oil/paper insulation...

This paper describes the suppression of dry-band arcing erosion silicone rubber by alumina tri-hydrate and silica fillers in DC inclined plane test, employing wavelet based multiresolution analysis leakage current. The third detail component current as decomposed wavelet-based is shown to be an indicator effectiveness filler type suppressing arcing. addition or increases thermal conductivity composites, retarding development eroding temperature, thus evolution detail. Additional effect also...

In this paper, the performance of silicone rubber composites containing 0, 10 and 30 wt % loading silica filler is investigated in initial-tracking voltage test method inclined plane under AC DC showing most inferior erosion class +DC followed by -DC then AC. as compared to dry-band arcing characteristics are analyzed conducting leakage current measurements prior after inception arcing. At high voltages, instability contaminant rivulet found be an important factor development dry band and,...

The paper reviews previous work on the DC inclined plane test and suggests equivalent voltage levels in parallel to AC ASTM tracking erosion test. aim of this is provide a basis for standardizing voltage. Round robin tests done five laboratories specimens silicone rubber material were with purpose establishing appropriate ratios by which voltages can be determined respect corresponding voltages. These as 67% 87%, +DC -DC respectively, initial voltage, practical purposes, these are rounded 70 90%.

This paper describes an investigation into the dry-band arcing mechanism leading to erosion of filled silicone rubber in DC inclined plane test. Good correlation is obtained between formation surface residue, hotspots and eroding arcing. The detected by infrared camera correlates well with temperature degradation determined thermogravimetric analysis differential scanning calorimetry. To characterize physical arcing, wavelet-based multiresolution up seven levels resolution applied leakage...

Evaluating the electrical tracking and erosion resistance of polymeric housing materials is an essential task performed in development outdoor insulators. “Tracking” means formation a surface carbonaceous path, “erosion” weight loss material. An absolute measurement not possible; only relative ranking composites can be achieved using standard tests. During early use organic insulating materials, failure due to was major concern, therefore screening methods were proposed evaluate rather than...

In this paper, a stochastic framework is proposed for optimizing replacement strategies of aged XLPE cables in the electric power distribution network. The facilitates realizing an economic value risk unplanned outages, thereby shifting paradigm replacing cable from technical decision that solely based on diagnostic measurements to techno-economic strategy. constitutes three main phases: (1) obtaining aging process due water-trees, (2) modeling as Markov process, and (3) applying linear...

In this letter a deep learning-based model is proposed for online inspection of silicone rubber outdoor insulators. The inclined plane tracking and erosion test used as per ASTM D2303 in order to simulate standard on insulation composites. Photos taken the tested composites are training testing inputs convolutional neural network topology learning model, thereby classifying degree damage into light, moderate severe. remarkable classification accuracy obtained shows potential utilizing...

The first polymer insulator for AC transmission lines was developed in the late 1950s. This consisted of a flexibilized epoxy resin weathershed cast onto fiberglass rod, and field trials on 138-kV line took place 1959. Insulators failed almost immediately energization due to severe tracking erosion bisphenol-A material, which later, through inclined-plane tests, shown be inherently unsuitable use outdoor insulation [1]. article describes study DC dry-band arcing mechanism as foundation...

This paper investigates the residue formed on silicone rubber filled with natural silica in inclined plane tracking and erosion test under AC DC voltages. Simultaneous thermogravimetric differential thermal analyses reveal formation dependent volatilization crosslinking rubber. Thermo-oxidation of volatiles yields silica-based protecting surface during dry-band arcing; whereas, leaves carbonaceous leading to more severe arcing. Volume fraction replacing is shown be a main source suppressing...

This paper discusses the state of art in application self-healing silicone-based materials for outdoor high-voltage insulation. Both dynamic behavior dimethyl side groups silicone rubber and diffusion a bulk siloxane to maintain low surface energy are respectively reported as intrinsic mechanisms responsible rubber. Localization, temporality, mobility, type synthesis aspects defining efficiency ability In addition, deterioration with filler loaded into insulation housing composites is...

In this paper, a novel selection algorithm of wavelet- based transformer differential current features is proposed. The minimum description length with entropy criteria are employed for an initial the mother wavelet and resolution level, respectively; whereas stepwise regression applied obtaining most statistically significant features. Dimensionality reduction accordingly achieved, acceptable accuracy maintained classification. validity proposed tested through neuro-wavelet- classifier...

This paper investigates the erosion suppression effects of water hydration in alumina tri-hydrate and magnesium hydroxide fillers silicone rubber during AC DC dry-bad arcing. Simultaneous thermogravimetric differential thermal analyses show hydrated filler type, level size affecting erosion. Water is shown to be released before depolymerization rubber; whereas, depolymerization. As such, could promote a stronger shield residue against dry-band arcing as compared hydroxide, which further...

This study investigates the role of filler interface on suppressing erosion room temperature vulcanized silicone rubber composites filled with fumed silica, nano alumina trihydrate and sub-micron hexagonal boron nitride fillers during DC dry-band arcing. Simultaneous thermogravimetric-differential thermal analyses indicate a superior effect for silica in depolymerization promoting radical based crosslinking. can be attributed to favorable interactions at silica-silicone tethering siloxane...

The main objective of this study is to investigate the feasibility using an RF antenna detect and classify partial discharges on polymer insulation surfaces. detected are identified based their originating sources, employing a cascade feature extraction, selection standard artificial neural network classifier. Both statistical spectral analyses have been used for extraction. Feature extraction followed by stage with novel implementation stepwise regression method in order derive...

The main objective of this study is to investigate the feasibility using an RF antenna detect partial discharges in outdoor insulators. Moreover, focuses on identifying sources discharge artificial neural networks. In insulators, could be initiated either from surface due pollution and/or corona energized ends. Both statistical and spectral features have been used as input vector a feed forward network with back propagation training algorithm. proposed method found successful classifying...

This paper investigates the effect of ground and fumed silica fillers on suppressing DC erosion in silicone rubber. Fumed are incorporated rubber at different loading levels comparatively analyzed this study. Outcomes +DC inclined plane tracking test indicate a better performance for filled composite despite having lower thermal conductivity compared to composite. Results simultaneous thermogravimetric differential analyses correlated with outcomes suggesting that suppresses depolymerization...

The concentration of furanic compounds in transformer's oil can be an effective measurement towards assessing the aging state impregnated paper transformer. rate change furan content is vital for deterioration cellulose insulation and its severity. This promotes as parameter transformer condition assessment accordingly asset management. In this correlation between parameters studied using artificial neural networks (ANN). A network used predicting based on different combinations input that...

In this paper erosion of silicone rubber loaded with 30 wt% ATH and silica is investigated in the DC inclined plane tracking/erosion test as per ASTM D 2303. Reduced equivalent voltages have been applied order to compare under AC. Hot spot temperatures are used for comparative analysis dry-band arcing severity on tested materials. Also, depending type filler, initiation stable intense discussed. Based results it proposed that existing material formulation AC insulators not suitable more...

The paper presents comparative inclined plane test results of high temperature vulcanized silicone rubber and EPDM elastomers filled with alumina trihydrate to 25 wt% under DC. Both the initial tracking voltage constant methods are employed evaluate relative tracking/erosion resistance both elastomers. While insignificant differences between two is observed, earlier failure occurs -DC. A recognizable distinction also found pattern corresponding dry-band arcing current. Shorter non-conduction...

This paper analyzes silicone rubber housing materials that have been aged in service 200 kV and 400 transmission line systems the Gulf region. Non-uniform discoloration with traces of white residue are more evident across upper lower sides as compared to sheds located near both energized ground ends insulators. Scanning electron microscopy (SEM) showed an increase roughness for all surfaces analyzed bulk. Surface oxidation was indicated by Oxygen/Carbon (O/C) ratio determined using energy...

The viability of fillers for inhibiting the dry-band arcing damage on high temperature vulcanized silicone rubber under critical AC and equivalent DC voltages inclined plane test is investigated. Alumina tri-hydrate ground silica are employed in study as common formulation outdoor voltage insulation, thermal analysis applied order to understand protective mechanisms fillers. Filler volume effect plays a role improving erosion performance, dilution water hydration shown advantageous...

This paper investigates the erosion of silicone rubber composites filled with various fillers. The fillers under study are alumina tri-hydrate, magnesium hydroxide and silica. inclined plane tracking test was used to compare composite materials at 50 wt% filler level 4.5 kV. Simultaneous thermogravimetric differential thermal analyses reported which shows mechanisms by suppress dry-band arcing erosion. effect water hydration in tri-hydrate is investigated its on suppression for hydroxide.

Insulator leakage current is the primary root cause of pole fires; therefore, it critical to recognize outdoor insulators as potential wildfires.