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Reliability and failure analysis of porcelain high-voltage surge arresters 陶瓷高压避雷器的可靠性与失效分析
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640776
J. Rossman, Mark A. Droke, J. H. Nelson
{"title":"Reliability and failure analysis of porcelain high-voltage surge arresters","authors":"J. Rossman, Mark A. Droke, J. H. Nelson","doi":"10.1109/ICHVE.2010.5640776","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640776","url":null,"abstract":"TVA identified an increasing failure rate of 132-kV (106-kV Maximum Continuous Operating Voltage) porcelain arresters on the 161-kV system. A cross-organizational team was formed to determine the root cause of the 19 arrester failures and provide solutions. The team researched arrester failure modes and solicited input from arrester experts. A root cause diagram is discussed and multiple failure modes were ruled out. Multiple failed arrester units were dissected indicating moisture ingress as the root cause leading to the recent failures. Computer simulations contrasted faults through the Metal Oxide Varistor (MOV) block stack versus faults flowing through the air cavity surrounding the MOV stack. All 19 failures were recorded by digital fault recorders (DFR). The DFR waveforms were compared to the computer simulations showing that the arresters flashed over the internal air cavity. Based on the available physical evidence, moisture ingress is the likely root cause issue for the failures from 2002 to date.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"23 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124296728","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}
引用次数: 6
Finite element modeling of the Grounding System in consideration of soil nonlinear characteristic 考虑土壤非线性特性的接地系统有限元建模
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640840
Jingli Li, T. Yuan, Qing Yang, W. Sima, Caixin Sun
{"title":"Finite element modeling of the Grounding System in consideration of soil nonlinear characteristic","authors":"Jingli Li, T. Yuan, Qing Yang, W. Sima, Caixin Sun","doi":"10.1109/ICHVE.2010.5640840","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640840","url":null,"abstract":"The aim of this paper is to calculate the response of grounding system under high-magnitude fault current accurately. In this work, A FEM model is presented to solve the problem in frequency domain. The ionized phenomenon in the soil around the grounding electrode is taken into account by setting the resistivity of every soil element varying with the electric field intensity. Open boundaries of earth are processed by introducing a spatial transformation which translates the semi-infinite space into the finite space. The suggested modeling is validated by comparison of the calculated results, which are laid out for grounding rod and grounding grid, with experimental and simulation results found in literatures.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124489887","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}
引用次数: 4
Long distance underground HVDC transmission via elpipes 长距离地下高压直流输电管道
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640717
R. Faulkner, R. Todd
{"title":"Long distance underground HVDC transmission via elpipes","authors":"R. Faulkner, R. Todd","doi":"10.1109/ICHVE.2010.5640717","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640717","url":null,"abstract":"Elpipes are polymer-insulated underground HVDC power lines that use relatively rigid extruded conductors designed for higher capacity and efficiency than is practical for overhead power lines. Elpipes can use far more conductor than cables, but also have more splices that an HVDC cable. The US Department of Energy showed early interest in massive underground transmission [1], but that faded until recently. The high efficiency of elpipes is motivated by the need to minimize heat dissipation while maintaining passive cooling. Minimizing waste heat production is critical since heat dissipation limits capacity. For a 325-800kV DC elpipe, we have selected a design basis of 1% loss per 1000 km, about three times better than an overhead 800kVDC line, and similar to “high temperature” superconducting (HTS) lines after accounting for the energy HTS lines consume for cryogenic cooling. This high efficiency enables continental scale power transfers with acceptable loss, and fully buried elpipes carrying up to 12 GW. Elpipes may one day enable continental scale HVDC grids, though there remain technological hurdles such as the need for HVDC breakers that must first be solved before that can occur.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133513806","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}
引用次数: 7
The study on the arrangement of UWB RF sensor-array for the PD location in transformers 变压器局部放电定位的超宽带射频传感器阵列布置研究
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640868
Shusheng Zheng, Chengrong Li, Z. Tang, W. Chang, R. Lu, Weiguo He, Yiming Jiang
{"title":"The study on the arrangement of UWB RF sensor-array for the PD location in transformers","authors":"Shusheng Zheng, Chengrong Li, Z. Tang, W. Chang, R. Lu, Weiguo He, Yiming Jiang","doi":"10.1109/ICHVE.2010.5640868","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640868","url":null,"abstract":"Ultra-Wideband (UWB) Radio Frequency (RF) PD location technique is a new method, which is based on diamond shape sensor array PD detection and time-delay function. In this paper, an UWB RF PD location system is designed, which works in the bandwidth of 2GHz–8GHz. The time-delay error has been brought down to 0.3ns. but the locating error of some PDs is larger than 30cm. To make clear this problem and solve it, the location errors of PD sources lying in transformer are calculated using diamond shape sensor array. The results indicated that the PD sources lying to the side of the sensor array cannot be located exactly. To solve this problem, we designed another sensor array and installed it on the side of transformer. PD locating experiments are carried on a 220kV transformer. The results confirmed the location accuracy of the new sensor array.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132661576","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}
引用次数: 4
High voltage series-compensated transmission line - evaluation of new distance protection 高压串联补偿输电线路——新型距离保护的评价
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640715
E. Rosolowski, J. Izykowski, P. Pierz, M. Fulczyk, P. Balcerek, M. Saha
{"title":"High voltage series-compensated transmission line - evaluation of new distance protection","authors":"E. Rosolowski, J. Izykowski, P. Pierz, M. Fulczyk, P. Balcerek, M. Saha","doi":"10.1109/ICHVE.2010.5640715","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640715","url":null,"abstract":"This paper investigates a new distance protection principle for a transmission line compensated with 3-phase capacitor banks installed in the middle of the line. Series Capacitors (SCs) equipped with Metal-Oxide Varistors (MOVs), when set on a transmission line, create certain problems for its protective devices. Direct application of the classic distance protection (designed for traditional lines) to series-compensated lines results in considerable shortening of the first zone reach and also in poor transient behaviour. In order to overcome these difficulties the new distance protection principle for the first zone has been developed. The detailed model of considered transmission lines including the SCs&MOVs banks as well as the measurement channels has been developed. Using this model, the reliable fault data has been generated for evaluation of the new distance protection principle under variety of fault conditions. The study has shown considerable improvement of series-compensated line protection as a result of applying the developed new principle.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133208862","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}
引用次数: 7
Identification of corona parameters on overhead power lines in case of direct lightning strikes 直击雷击时架空电晕参数的识别
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640864
J. Bajorek, G. Masłowski, R. Ziemba
{"title":"Identification of corona parameters on overhead power lines in case of direct lightning strikes","authors":"J. Bajorek, G. Masłowski, R. Ziemba","doi":"10.1109/ICHVE.2010.5640864","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640864","url":null,"abstract":"Some problems of lightning overvoltage simulations for transmission lines with nonlinear corona model were presented in our previous papers [1, 2]. Obtained transients for relatively large peak values of subsequent lightning returnstroke currents, carried out by application of EMTP-RV, showed that nonlinear models of back-flashover and ZnO arresters work properly, while the corona model implemented in EMTP-RV gives some instabilities during simulations. A new approach using transfer functions for the linear part of the corona model is tested in the paper. The high efficiency System Identification Toolbox built in Matlab package is used during analysis of transfer functions. Obtained results show some possibilities of modeling of nonlinear elements using control devices in EMTP-RV simulator.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131422795","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}
引用次数: 3
Electrical stress distribution in cable accessories when testing at different frequencies 在不同频率下测试时电缆附件的电应力分布
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640841
J.J. Walker, A. Wolmarans
{"title":"Electrical stress distribution in cable accessories when testing at different frequencies","authors":"J.J. Walker, A. Wolmarans","doi":"10.1109/ICHVE.2010.5640841","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640841","url":null,"abstract":"This paper report on an theoretical investigation using FEA simulations on the stress distribution in medium voltage cable joints. Three different supplies namely 50 Hz sinusoidal, VLF 0.1 Hz sinusoidal and VLF 0.1 Hz cosine square were evaluated. The simulation results show that phase shifts occur in the stresses under 0.1 Hz sinusoidal voltages and that only above 10 Hz sinusoidal no phase shifts occur. With the application VLF 0.1 Hz cosine square the stresses are totally different to normal operating stresses. The reason for these differences is the influence of the volume resistivity and the interfacial polarization during low frequencies. The mechanisms involved to determine the stress distribution in the joint which as a multi layer insulation system is totally different to a cable which is a single layer insulation system. This should be taken into account when the most appropriate test voltage and frequency are selected for commissioning tests.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114312442","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}
引用次数: 7
PD pattern recognition in oil-paper insulation based on discharge time interval 基于放电时间间隔的油纸绝缘放电模式识别
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640802
Quan Zhou, Yun Zhang, Wen-dou An, Fan Liu, R. Liao, Xin Zhang
{"title":"PD pattern recognition in oil-paper insulation based on discharge time interval","authors":"Quan Zhou, Yun Zhang, Wen-dou An, Fan Liu, R. Liao, Xin Zhang","doi":"10.1109/ICHVE.2010.5640802","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640802","url":null,"abstract":"Partial discharge (PD) inside insulation is considered as one major cause of insulation degradation in electrical equipment and attached importance to the safety and reliability of running electrical equipment. Time intervals between consecutive discharges ( Δt ) may even be more efficient to characterize a defect or to differentiate between different defects. Oil-paper insulation is the most important part in transformer. In this paper, five kinds of typical artificial defect models of oil-paper insulation were designed. The time interval distributions of PD pulse were introduced in PD pattern recognition, the 3-D pattern Hn (Δt, ϕ) of discharge phase, time interval and discharge number ϕ-Δt-n distribution was constructed, and the box dimension and information dimension of gray intensity images which are transferred by 3-D pattern were analyzed and extracted. In this scheme, PD fractal dimensions were used as inputs, radial basis function neural network (RBFNN) was used as classifier, five kinds of artificial oil-paper insulation defects were distinguished, recognition rates are all over 90%, and it shows well in noise interference suppression.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114481176","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}
引用次数: 1
Performance of cables and machines insulation at various parameters of impulse stimulus 电缆和机器在各种脉冲刺激参数下的绝缘性能
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640843
B. Florkowska, P. Zydroń, J. Roehrich, M. Florkowski
{"title":"Performance of cables and machines insulation at various parameters of impulse stimulus","authors":"B. Florkowska, P. Zydroń, J. Roehrich, M. Florkowski","doi":"10.1109/ICHVE.2010.5640843","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640843","url":null,"abstract":"The impulse stimulus like PWM (Pulse Width Modulation) creates special challenges on the requirements of the insulation systems of both electrical machines and cables. Voltage waveforms characterized by repetitive slopes of fast rise- and fall times are influencing the aging phenomena in the insulation system of cables and motors, especially creating the danger of partial discharge (PD) development. The repetitive character of the pulses (usually in kHz range) combined with rapid voltage changes results in dedicated aging processes. This problem has been investigated in the laboratory setup, on samples of polymer cable and machine insulation. The dedicated measuring system allowed for setup of various parameters of IGBT based inverter like rise time, frequency, voltage, du/dt, polarity. The PD patterns have been acquired both at the slope and on the pulse constant part. The comparative assessment shows influence of the du/dt steepness and switching frequency on the PD activity on the waveform slopes but also on the plateau part. The qualitative illustration of these parameters on PD inception and magnitude has been presented.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129773791","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}
引用次数: 6
Application of sleeve monopole antenna for partial discharge detection in transformer 套筒单极天线在变压器局部放电检测中的应用
2010 International Conference on High Voltage Engineering and Application Pub Date : 2010-11-18 DOI: 10.1109/ICHVE.2010.5640805
Xincai Zheng, Haijun Cao, Ju Tang, Xiaoxing Zhang
{"title":"Application of sleeve monopole antenna for partial discharge detection in transformer","authors":"Xincai Zheng, Haijun Cao, Ju Tang, Xiaoxing Zhang","doi":"10.1109/ICHVE.2010.5640805","DOIUrl":"https://doi.org/10.1109/ICHVE.2010.5640805","url":null,"abstract":"Based on the structure of power transformer, a sleeve monopole antenna for partial discharge detection in transformer was designed. In this paper, the structure of the antenna is described, the calculation principle and method of the antenna parameters are presented. Through optimizing the structure parameters, which change the input impedance of the antenna, good VSWR characteristic, high gain and steady pattern are obtained. According to simulation analysis and actual measurement, the bandwidth of the antenna is 350∼500 MHz, and the center∼equency is 425 MHz, the average gain reaches 2.16 dBi and varies little in the whole bandwidth. The laboratory measurement result shows that the sleeve monopole antenna can satisfy the requirement of partial discharge detection, and detect the partial discharge signals in effective band with high sensitivity and good directivity.","PeriodicalId":287425,"journal":{"name":"2010 International Conference on High Voltage Engineering and Application","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127148794","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}
引用次数: 5
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