2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)最新文献

{"title":"Vacuum DC flashover performance improvement by CF4 radio frequency capacitively coupled plasma","authors":"Chenxu Wang, Xingyu Chen, Bo Zhang, Yuhao Sun, Ya-Chi Peng, Guanjun Zhang","doi":"10.1109/ICPADM49635.2021.9493985","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493985","url":null,"abstract":"The vacuum flashover performance of insulating materials plays an important role in the development of high-voltage insulation systems. Radio frequency capacitively coupled plasma (RF-CCP) is often used for surface modification due to its stability and uniformity. In this paper, silicone rubber is modified by CF4 RF-CCP for the improvement of surface flashover withstanding strength. The surface properties of samples were evaluated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and surface charge accumulation and charge dissipation measurement. The results show that the withstanding strength of SIR samples treated by RF-CCP can be promoted up to 24% in vacuum. It is considered that increased surface roughness and introduction of fluorine-containing functional groups both suppress SEEA process and improve the flashover voltage of materials.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123110034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of Power Transformer Remaining Life Model Using Multi-Parameters","authors":"R. A. Prasojo, A. Setiawan, Suwarno, N. Maulidevi, Bambang Anggoro Soedjarno","doi":"10.1109/ICPADM49635.2021.9493928","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493928","url":null,"abstract":"Power transformer is considered to be important and costly equipment in electrical power delivery. The years of operation may decrease the condition faster than the design life. For that reason, predicting the remaining life of the asset is essential. Power transformer oil-paper insulation is the main concern for remaining life assessment. Extended studies have been done to predict the remaining life through its paper condition as the ageing is known to be irreversible. However, only a few have proposed the evaluation of remaining life through multi-parameter assessment. Therefore, this paper aims to benefit the previously developed Health Index (HI) to evaluate power transformer expected remaining life. A population of 150 kV transformers was employed to develop the model, and forty-nine out-of-service transformers data were used to be formulated as the replacement criterion. The model development as well as case studies is presented in this paper.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123589138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced Polymeric Cable Degradation Diagnostics using Time Domain Reflectometry Technique","authors":"T. M. Kuan, A. M. Ariffin, S. Sulaiman, H. Illias, W. Raymond","doi":"10.1109/ICPADM49635.2021.9493948","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493948","url":null,"abstract":"Power cable is an important medium to transmit electricity from generation to transmission and distributing to end users. Despite taking various preventive measures, there are still numerous reports on power outages due to power cable failure. Power utility companies have been using time domain reflectometry (TDR) technique to locate fault in cable. However, the cable diagnosis often consumes long period of time due to uncertainty of cable fault signatures from the TDR result. Therefore, this study aims to investigate the cable fault signature from the TDR result so that fault in the cable can be identified quickly for replacement work to take place. This study consists of TDR simulation work using MATLAB Simulink and validation of simulation results with TDR experiments. Power cable is first modelled without any joint followed by a cable with two joints. Conditions of every cable section is varied for each cable model to replicate all possibilities of cable degradation along the cable. Simulation results from all cable configurations are then validated with TDR experiments. Both TDR simulation and experimental results have shown consistencies in the TDR reflections with distinct signatures where it can be detected by observing the delay and change in magnitude of cable joint reflections. Greater delay shows higher level of degradation in the cable. Degraded cable with joint can be identified from the cable joint reflection that has a higher magnitude. With these TDR reflection signatures, degraded cable can be identified and sectionalized for cable replacement to take place immediately and thus, minimizes the electricity disruption time.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123702197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, Structural and Dielectric Characteristics of Liquid Crystalline Azo-Based Compounds with Different Terminal Length","authors":"Z. Jamain, Samerah Habil, M. Makmud, M. Khairuddean","doi":"10.1109/ICPADM49635.2021.9493959","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493959","url":null,"abstract":"The research was conducted to study the chemical structure and their relationship between mesomorphic and dielectric properties. The understanding of the relationship between structure, liquid crystal and dielectric behaviour is very important in designing new liquid crystal materials with desirable properties for future applications. Thus, this study focused on the preparation of azo-based compounds with different terminal length. Diazotization reaction of p-nitroaniline with phenol formed 4-(4-nitrophenylazo)phenol, 1 which was alkylated with heptyl and tetradecylbromide to give a series of nitro compounds, 2a-b. Structure elucidation of these compounds were confirmed using Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectroscopy (NMR). Liquid crystal properties of these intermediates and compounds were determined using polarized optical microscope (POM). It was found that compounds 2a-b with nitro and alkoxy terminal chains attached to azo linking units showed a smectic A (SmA) phase in the heating and cooling cycles. The presence of mesophase(s) and transitional properties of each phase of these compounds were further confirmed using differential scanning calorimetry (DSC). Based on the DSC thermograms of compounds 2a-b, two endotherms were observed in both cycles for the transition of Crystal-SmA-Isotropic phases. The dielectric characteristics showed that the relative permittivity decreased as the number of alkyl group increased. Meanwhile, the loss tangent of both compounds decreases with increasing frequency spectra.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116164753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Charge Trapping Processes of Epoxy Resin Nanocomposites","authors":"Xiaona Pang, Peng Liu, Zongren Peng, B. Cui, Xi Yang, Yaqin Wen","doi":"10.1109/ICPADM49635.2021.9493947","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493947","url":null,"abstract":"Space charge transport characteristics of epoxy resin composites under UHVDC play an important role in reliable performance of UHVDC dry casing and long term safe and stable operation of UHVDC transmission projects. In this paper, one-dimensional bipolar carrier transport model is established to numerically calculate the space charge distribution in epoxy resin composites. The effect of carrier mobility, trap depth and trap density on the internal space charge transport characteristics is investigated. Results show that with the increase of shallow trap distance, the carrier mobility increase which result in charge accumulation inside the samples and more serious electric field distortion. As deep trap depth and density increase, the charge accumulation area gradually moves from the center to both electrodes, effectively inhibiting the space charge injection and reducing electric field distortion. These results provide theoretical basis for reducing space charge accumulation in epoxy resin composites and optimizing structure of UHVDC dry casing.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122829520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New thermoplastic insulation for track-resistant overhead cables with improved properties","authors":"D. Wald, Pasi Raikisto","doi":"10.1109/ICPADM49635.2021.9493981","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493981","url":null,"abstract":"Non-shielded overhead cables have been installed for a long time in different variations. This paper describes the development of a fully thermoplastic insulation system that is suitable for a 90 °C conductor temperature. This has all of the advantages of a cross-linked system, better track resistance than an XLPE insulated cable yet none of the disadvantages like a longer production process.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122037626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aging of oil-impregnated paper at different frequencies","authors":"M. Niasar, W. Zhao","doi":"10.1109/ICPADM49635.2021.9493911","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493911","url":null,"abstract":"In this work, breakdown strength and lifetime curve of oil-impregnated paper (OIP) are compared at 50Hz and 1500 Hz. For the ramp breakdown tests, sinusoidal voltage ramp of 1 kVp/s is used. The ramp breakdown experiments is conducted on OIP samples made of single and double sheets of OIP. Weibull plots and interpretation of the results are presented. In order to obtain lifetime curves, a step sinusoidal voltage waveform whose peak value is close to the minimum OIP ramp breakdown voltage is applied on single sheet of OIP samples. Time to breakdown is measured, and each experiment is repeated between 20-30 times to obtain good statistical results. The experiments were focused on four different voltage levels and the lifetime curves are plotted for those two target frequencies. Parameters of the lifetime curves are extracted and the interpretation is given.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124109998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on the Effect of the Cross-Section of Insulators on the Radial Discharge Distribution of Creeping Discharges","authors":"S. Ediriweera, P. Jayarathna, R. Samarasinghe, R. Lucas","doi":"10.1109/ICPADM49635.2021.9493995","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493995","url":null,"abstract":"Divergent electric fields on the solid/liquid interfaces of oil-filled assets can lead to the propagation of the creeping discharges over the interface. Therefore, it has become an interest of the researchers to analyze creeping discharges in a laboratory environment for the design optimization of high voltage assets. Over the past decade, studies have been carried out to analyze creeping discharges using both experimental and simulation models. It has been observed that the shape of the interface effects on the propagating pattern according to simulation and experimental studies. This work is aimed at the study of the effect of the shape of the cross-section of the insulators on the radial discharge distribution of creeping discharges using a test apparatus and a simulating model. The test setup is based on a point plane electrode system and required solid/liquid interfaces are created by immersing the prepared insulating samples with two different cross-sections in the dielectric liquid. A model is formulated in a Laplacian field and the pattern propagates in a stepwise manner depending on the electric field distribution of the area enclosed by the boundaries of different shapes. It can be seen that the maximum value of the radial discharge distribution of the pattern can be observed in-between the center of the pattern and the edge of the interface and that point moves toward the boundary of the insulator as the applied voltage increases. It can be seen that the distribution corresponding to the square cross-section is higher than that of the circular cross-section around the center of the propagating patterns while simulation studies show that radial discharge distribution is independent of the shape of the cross-section. The study shows that experimental studies regarding the effect of the shape of the material cannot be replaced with simulations even if it may provide a theoretical foundation to analyze creeping discharges. However, the work reveals that it is better to consider the total area of the pattern instead of the distribution of the pattern to evaluate the damage done by the discharge for different kinds of insulator shapes.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114616998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of the Interphase and Agglomeration on the Tensile Properties of Epoxy/Alumina Nanocomposites","authors":"Neelmani Neelmani, H. Suematsu, R. Sarathi, Toshikatsu Tanaka","doi":"10.1109/ICPADM49635.2021.9493897","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493897","url":null,"abstract":"Tensile properties of the epoxy nanocomposites is very much dependent on the interphase properties and agglomeration of nanoparticles. To analyze the interphase and agglomeration effect, epoxy/alumina nanocomposites were prepared with different content of alumina nanoparticles and its Young’s modulus were analyzed using proposed theoretical model and adopting lognormal distribution characteristics. Agglomeration was more dominant at higher content of nanofiller. Agglomeration and effective Young’s modulus decreased with the increment in the agglomerate size and their lognormal distribution curve’s peak shifted to higher value for higher wt% of alumina nanofiller.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116359357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of Duval Pentagon to the Multi-Method Interpretation to Improve the Accuracy of Dissolved Gas Analysis Technique","authors":"Heri Sutikno, R. A. Prasojo, Suwarno","doi":"10.1109/ICPADM49635.2021.9493929","DOIUrl":"https://doi.org/10.1109/ICPADM49635.2021.9493929","url":null,"abstract":"Dissolved Gas Analysis (DGA) is the most effective method for detecting the gas abnormality in transformer insulating oil due to the thermal and electrical stresses received when the transformer operates. Various DGA interpretation techniques have developed rapidly. Each has its advantages and disadvantages. However, it is possible to misinterpret one oil sample. Besides that, the engineer's experiences and knowledge still have the most significant role in predicting the DGA sample subjectively. The multi-method interpretation technique is a method that is quite relevant to cover various techniques in increasing consistency and accuracy rate. This paper proposes Duval Pentagon Method (DPM) integration as the recent interpretation of the multi-method techniques. The method was developed based on IEC 10 TC database, then validated with 52 samples from previous researches. The results showed that there was a significant increase in accuracy and consistency rate with the multi-method using DPM integration. This method produces the highest level of accuracy, 96.15%, and consistency of 90.48% compared to others DGA interpretation techniques.","PeriodicalId":191189,"journal":{"name":"2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134161847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}