Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566282
F. Espino-cortes, S. Jayaram, E. Cherney
The paper discusses the effectiveness of stress control coatings on the ends of 4 kV motor coils under fast rise time pulses that arise from PWM drives. The analysis of the stress relief is done using a transient finite element method and the results are compared to experimental measurements. Currently adopted stress control coatings do not effectively grade the electric stress arising from fast rise time pulses from PWM inverter drives which easily reaches the partial discharge threshold on the ground wall insulation surface of the form wound coils. Electric field enhancement is shown to be considerably greater under polluted conditions. In this work, changes to the properties of the coatings are suggested as a solution to improve the effectiveness of stress control coatings on form wound coils in motors connected to inverter fed drives
{"title":"Effectiveness of stress control coatings in medium voltage form wound coil ends under fast rise time pulses and contamination","authors":"F. Espino-cortes, S. Jayaram, E. Cherney","doi":"10.1109/EEIC.2005.1566282","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566282","url":null,"abstract":"The paper discusses the effectiveness of stress control coatings on the ends of 4 kV motor coils under fast rise time pulses that arise from PWM drives. The analysis of the stress relief is done using a transient finite element method and the results are compared to experimental measurements. Currently adopted stress control coatings do not effectively grade the electric stress arising from fast rise time pulses from PWM inverter drives which easily reaches the partial discharge threshold on the ground wall insulation surface of the form wound coils. Electric field enhancement is shown to be considerably greater under polluted conditions. In this work, changes to the properties of the coatings are suggested as a solution to improve the effectiveness of stress control coatings on form wound coils in motors connected to inverter fed drives","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116570275","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566293
Xiujuan Chen, Chengrong Li, Xingquan Huang, Linjie Zhao, Wei Song
The hydrophobicity of composite insulators is a very important property for composite insulators used on transmission lines. An off-line test to indicate the hydrophobicity of a composite insulator has been developed by STRI, but it can not be used under on-line conditions. The objective of this paper is focused on an on-line estimation of the hydrophobicity of composite insulators using the digital images taken in the field. In order to identify the hydrophobic class of an insulator based on the digital images taken in the field, four algorithms were studied for imaging analysis, which include the improved ANE (the average of normalized entropies) method, the SPS (the seed point statistic) method, the FMA (the frequent magnitude analysis) method and the improved SF (the shape factor) method. The results from our study indicate that the improved SF method shows the best results for estimating the hydrophobicity of composite insulators in service. The way to measure on-line the hydrophobicity of composite insulators has been developed. It consists of a set of portable devices and the relative measuring rules. The devices include a sprayer with an insulated operating arm, a digital camera, and software. For every composite insulator in service, the upper surfaces of three sheds closest to the tower are chosen for the measurement. The way to spray distilled water on to the surface of the insulator has been investigated and an operating method suitable for on-line testing has been developed. The photo analysis for an indication of hydrophobicity is also carried out in our laboratory. The results from our study show that it is possible to determine the hydrophobicity of the composite insulators from the photos taken in the field based on our hydrophobicity analysis software with the aid of the operator. On site testing for determining the hydrophobicity of composite insulators has carried out on certain 220 kV transmission line in central China on three occasions. The results from on-line measurement show that the method we developed is suitable for on-line measurement and several composite insulators on this line exhibited poor hydrophobicity (HC7). The reasons for the degradation of the hydrophobicity of the insulators are being investigated
{"title":"On-line estimating the level of hydrophobicity of composite insulators using the digital images","authors":"Xiujuan Chen, Chengrong Li, Xingquan Huang, Linjie Zhao, Wei Song","doi":"10.1109/EEIC.2005.1566293","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566293","url":null,"abstract":"The hydrophobicity of composite insulators is a very important property for composite insulators used on transmission lines. An off-line test to indicate the hydrophobicity of a composite insulator has been developed by STRI, but it can not be used under on-line conditions. The objective of this paper is focused on an on-line estimation of the hydrophobicity of composite insulators using the digital images taken in the field. In order to identify the hydrophobic class of an insulator based on the digital images taken in the field, four algorithms were studied for imaging analysis, which include the improved ANE (the average of normalized entropies) method, the SPS (the seed point statistic) method, the FMA (the frequent magnitude analysis) method and the improved SF (the shape factor) method. The results from our study indicate that the improved SF method shows the best results for estimating the hydrophobicity of composite insulators in service. The way to measure on-line the hydrophobicity of composite insulators has been developed. It consists of a set of portable devices and the relative measuring rules. The devices include a sprayer with an insulated operating arm, a digital camera, and software. For every composite insulator in service, the upper surfaces of three sheds closest to the tower are chosen for the measurement. The way to spray distilled water on to the surface of the insulator has been investigated and an operating method suitable for on-line testing has been developed. The photo analysis for an indication of hydrophobicity is also carried out in our laboratory. The results from our study show that it is possible to determine the hydrophobicity of the composite insulators from the photos taken in the field based on our hydrophobicity analysis software with the aid of the operator. On site testing for determining the hydrophobicity of composite insulators has carried out on certain 220 kV transmission line in central China on three occasions. The results from on-line measurement show that the method we developed is suitable for on-line measurement and several composite insulators on this line exhibited poor hydrophobicity (HC7). The reasons for the degradation of the hydrophobicity of the insulators are being investigated","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126924882","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566329
D. Murthy, M. Kazimierczuk
Steady-state (DC) analysis of the flyback PWM DC-to-DC converter is performed for continuous conduction mode (CCM). The equations for the device stresses and the component values are derived. The circuit is designed and simulated with the aid of P-SPICE. The effect of transformer leakage inductance and the MOSFET output capacitance on switching losses is investigated. The ringing in the output voltage waveform of the power MOSFET switch is observed. The resonant behavior is analyzed and presented in this work
{"title":"Performance evaluation of flyback converter","authors":"D. Murthy, M. Kazimierczuk","doi":"10.1109/EEIC.2005.1566329","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566329","url":null,"abstract":"Steady-state (DC) analysis of the flyback PWM DC-to-DC converter is performed for continuous conduction mode (CCM). The equations for the device stresses and the component values are derived. The circuit is designed and simulated with the aid of P-SPICE. The effect of transformer leakage inductance and the MOSFET output capacitance on switching losses is investigated. The ringing in the output voltage waveform of the power MOSFET switch is observed. The resonant behavior is analyzed and presented in this work","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133823723","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566273
W. McDermid, J. Bromley
Since the late 1960s Manitoba hydro has been making high direct-voltage ramp tests to detect defects in the groundwall insulation of the stator windings of generators and motors. At first an electrostatic generator was used to obtain the necessary voltage regulation and an operational amplifier was added to the control circuitry to produce the desired ramp function in the output voltage. In the 1980s a much smaller solid state supply was introduced in which the high voltage transformer operates >40 kHz. This high voltage supply has superior voltage regulation and it was modified to provide the desired ramp function output voltage. Until recently the measured current was plotted on the vertical axis of an X-Y recorder while the horizontal axis indicated either time (for the initial polarization index step) or voltage (for the ramp test). However there has been increasing difficulty in maintaining the X-Y recorder in reliable condition. New recorders of this type are no longer available from most suppliers. To overcome these problems a data acquisition system was introduced which allows the current and voltage data to be logged on a laptop PC. Identification and temperature data are keyboard entered. Once stored securely the data can be displayed in different formats. This greatly increases the flexibility of the record system
{"title":"Ramp test development and data acquisition","authors":"W. McDermid, J. Bromley","doi":"10.1109/EEIC.2005.1566273","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566273","url":null,"abstract":"Since the late 1960s Manitoba hydro has been making high direct-voltage ramp tests to detect defects in the groundwall insulation of the stator windings of generators and motors. At first an electrostatic generator was used to obtain the necessary voltage regulation and an operational amplifier was added to the control circuitry to produce the desired ramp function in the output voltage. In the 1980s a much smaller solid state supply was introduced in which the high voltage transformer operates >40 kHz. This high voltage supply has superior voltage regulation and it was modified to provide the desired ramp function output voltage. Until recently the measured current was plotted on the vertical axis of an X-Y recorder while the horizontal axis indicated either time (for the initial polarization index step) or voltage (for the ramp test). However there has been increasing difficulty in maintaining the X-Y recorder in reliable condition. New recorders of this type are no longer available from most suppliers. To overcome these problems a data acquisition system was introduced which allows the current and voltage data to be logged on a laptop PC. Identification and temperature data are keyboard entered. Once stored securely the data can be displayed in different formats. This greatly increases the flexibility of the record system","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131346502","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566312
J. Anzicek, M. Thompson
This paper presents the design and performance of a low cost, fully integrated DC-DC power conversion and control system for a modified global electric motors (GEM) fuel cell hybrid vehicle. The system incorporates a custom designed DC-DC boost converter which steps up the nominal 26 V DC fuel cell stack voltage to interface with the 72 V DC vehicle battery bus at an input power level of 1.2 kW. Additionally, several embedded control functions are implemented to integrate a Ballard Nexa" fuel cell power module into the GEM vehicle. The converter and control system features a microchip PIC micro-controller programmed using embedded C code. The power converter section is designed around a custom wound toroidal inductor. Several low loss considerations were incorporated into the design to attain high efficiency conversion. Design equations supported by performance data indicates that the DC-DC power converter achieves a conversion efficiency approaching 98% for a single fuel cell power module operating at full output power (1.2 kW). Design enhancements are discussed that facilitate the operation of the converter with two parallel connected fuel cell modules (2.4 kW) at high efficiencies. The control system incorporates algorithms to perform battery charging and power ramp rate, as well as fuel cell voltage and current limiting. The control system exhibits stable performance characteristics throughout the entire vehicle load range and battery state of charge range, while tracking vehicle transient conditions
{"title":"DC-DC boost converter design for Kettering Universitys GEM fuel cell vehicle","authors":"J. Anzicek, M. Thompson","doi":"10.1109/EEIC.2005.1566312","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566312","url":null,"abstract":"This paper presents the design and performance of a low cost, fully integrated DC-DC power conversion and control system for a modified global electric motors (GEM) fuel cell hybrid vehicle. The system incorporates a custom designed DC-DC boost converter which steps up the nominal 26 V DC fuel cell stack voltage to interface with the 72 V DC vehicle battery bus at an input power level of 1.2 kW. Additionally, several embedded control functions are implemented to integrate a Ballard Nexa\" fuel cell power module into the GEM vehicle. The converter and control system features a microchip PIC micro-controller programmed using embedded C code. The power converter section is designed around a custom wound toroidal inductor. Several low loss considerations were incorporated into the design to attain high efficiency conversion. Design equations supported by performance data indicates that the DC-DC power converter achieves a conversion efficiency approaching 98% for a single fuel cell power module operating at full output power (1.2 kW). Design enhancements are discussed that facilitate the operation of the converter with two parallel connected fuel cell modules (2.4 kW) at high efficiencies. The control system incorporates algorithms to perform battery charging and power ramp rate, as well as fuel cell voltage and current limiting. The control system exhibits stable performance characteristics throughout the entire vehicle load range and battery state of charge range, while tracking vehicle transient conditions","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115385973","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566276
Liu Hualing, W. Jun
With rapid development of modern industry, especially high-tech industry, the need for heat endurance insulation materials is getting stronger. This paper discusses synthetic mica used for various heat endurance insulation products due to its outstanding properties of high heat endurance, excellent acid and alkali stability, good electric insulation. Also presents solutions for more technical problems in production and utilization
{"title":"Application of synthetic mica and some technical problems in production","authors":"Liu Hualing, W. Jun","doi":"10.1109/EEIC.2005.1566276","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566276","url":null,"abstract":"With rapid development of modern industry, especially high-tech industry, the need for heat endurance insulation materials is getting stronger. This paper discusses synthetic mica used for various heat endurance insulation products due to its outstanding properties of high heat endurance, excellent acid and alkali stability, good electric insulation. Also presents solutions for more technical problems in production and utilization","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124291775","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566315
C. Mclyman
The purpose of this paper is to design a continuous current, buck-boost converter using the core geometry approach. The design will show engineers another method of designing transformers and inductors using this step-by-step approach. There are many advantages of using the core geometry method for designing inductors and transformers over the area product method. The core geometry will give the engineer another tool to better understand transformer and inductor design and therefore, cut the design time way down
{"title":"Designing a continuous current buck-boost converter using the core geometry","authors":"C. Mclyman","doi":"10.1109/EEIC.2005.1566315","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566315","url":null,"abstract":"The purpose of this paper is to design a continuous current, buck-boost converter using the core geometry approach. The design will show engineers another method of designing transformers and inductors using this step-by-step approach. There are many advantages of using the core geometry method for designing inductors and transformers over the area product method. The core geometry will give the engineer another tool to better understand transformer and inductor design and therefore, cut the design time way down","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116511658","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566271
W. McDermid, D. Grant
Oil filled power transformers in Manitoba Hydro have free breathing conservators. Some of the insulating oil purchased since the late 1970s has had a shorter service life than oils that were purchased earlier. Corrective and preventive measures are discussed. Evaluation of and service applications with a new isoparaffin oil are reported
{"title":"Experience with oil in power transformers with free breathing conservators","authors":"W. McDermid, D. Grant","doi":"10.1109/EEIC.2005.1566271","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566271","url":null,"abstract":"Oil filled power transformers in Manitoba Hydro have free breathing conservators. Some of the insulating oil purchased since the late 1970s has had a shorter service life than oils that were purchased earlier. Corrective and preventive measures are discussed. Evaluation of and service applications with a new isoparaffin oil are reported","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123676137","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566285
B. Du, Yong Liu, H.J. Liu
The process of leading to breakdown of low-density polyethylene (LDPE) film and high-density polyethylene (HDPE) film was investigated, with particular attention on the breakdown phenomenon identification. From the pictures of breakdown point obtained by a monocular video zoom microscope, it can be observed that the shape of breakdown area was almost identical to the type of electrodes. Meanwhile, the mathematical statistics were used to analyze the obtained results. The study revealed that the DC breakdown voltage of HDPE was higher than that of LDPE. The breakdown diameter and area of HDPE was bigger than that of LDPE. To the needle-plane electrode, the diameter and area of breakdown point with the polymer film at the plane electrode was bigger than that at the needle electrode, and that at the middle of gap distance was between them. To the sphere-plane electrode, the diameter and area of breakdown point with the polymer film at the sphere electrode was bigger than that at the plane electrode, and that at the middle of gap distance was between them
{"title":"A study on breakdown phenomenon identification of polymer films","authors":"B. Du, Yong Liu, H.J. Liu","doi":"10.1109/EEIC.2005.1566285","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566285","url":null,"abstract":"The process of leading to breakdown of low-density polyethylene (LDPE) film and high-density polyethylene (HDPE) film was investigated, with particular attention on the breakdown phenomenon identification. From the pictures of breakdown point obtained by a monocular video zoom microscope, it can be observed that the shape of breakdown area was almost identical to the type of electrodes. Meanwhile, the mathematical statistics were used to analyze the obtained results. The study revealed that the DC breakdown voltage of HDPE was higher than that of LDPE. The breakdown diameter and area of HDPE was bigger than that of LDPE. To the needle-plane electrode, the diameter and area of breakdown point with the polymer film at the plane electrode was bigger than that at the needle electrode, and that at the middle of gap distance was between them. To the sphere-plane electrode, the diameter and area of breakdown point with the polymer film at the sphere electrode was bigger than that at the plane electrode, and that at the middle of gap distance was between them","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125182181","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}
Pub Date : 1900-01-01DOI: 10.1109/EEIC.2005.1566290
Chen Yu, Xiaojun Xie, Liu Tong, Xuesheng Hu, Zhelei Zhu, Yonghong Cheng, Cui Wei, Sushan Jiao
Different defects in gas insulation substation (GIS) cause several types of partial discharge (PD). A novel on-line PD monitoring technique for GIS is described in this paper. An external sensor is adopted to detect the PD signal and has a wide frequency band. Two kinds of measurement method are used for PD signal acquisition, and high performance hardware units are also employed in order to reflect the true PD characteristics. Based on the idea of combining statistical analysis and high frequency analysis, the analysis level is improved. The developed PD on-line monitoring system has been operating at one 110 kV GIS substation. The results show that the system is effective
{"title":"Development and application of a novel partial discharge on-line monitoring system for GIS","authors":"Chen Yu, Xiaojun Xie, Liu Tong, Xuesheng Hu, Zhelei Zhu, Yonghong Cheng, Cui Wei, Sushan Jiao","doi":"10.1109/EEIC.2005.1566290","DOIUrl":"https://doi.org/10.1109/EEIC.2005.1566290","url":null,"abstract":"Different defects in gas insulation substation (GIS) cause several types of partial discharge (PD). A novel on-line PD monitoring technique for GIS is described in this paper. An external sensor is adopted to detect the PD signal and has a wide frequency band. Two kinds of measurement method are used for PD signal acquisition, and high performance hardware units are also employed in order to reflect the true PD characteristics. Based on the idea of combining statistical analysis and high frequency analysis, the analysis level is improved. The developed PD on-line monitoring system has been operating at one 110 kV GIS substation. The results show that the system is effective","PeriodicalId":267510,"journal":{"name":"Proceedings Electrical Insulation Conference and Electrical Manufacturing Expo, 2005.","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114174159","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：