2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)最新文献_第2页

Design and Application of a Wireless Intelligent Detection System for Leakage Current of MOA MOA泄漏电流无线智能检测系统的设计与应用

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708149

Yufei Sha, Yangchun Cheng, Gang Du

{"title":"Design and Application of a Wireless Intelligent Detection System for Leakage Current of MOA","authors":"Yufei Sha, Yangchun Cheng, Gang Du","doi":"10.1109/AEERO52475.2021.9708149","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708149","url":null,"abstract":"Metal oxide arrester (MOA) online monitoring systems are increasingly used in smart substations, but there are also some problems in project operation, such as difficulty in measuring reference voltage, inaccurate monitoring data, poor integration. In order to solve the above problems, this paper developed a high-precision wireless intelligent detection system for reference voltage and leakage current of MOA. It directly measures the bus voltage on the secondary side of the CVT, and transmit wireless signals for a long time as a phase reference for the whole station to use. The leakage current measurement is started at the voltage zero-crossing, and the dielectric loss angle is calculated through Hanning windowed interpolation fast Fourier transform (FFT) algorithm. The voltage and current measurement circuit contains automatic gain adjustment functions and self-calibration functions and the changes caused by the sensor and filter can be corrected by itself. Through comparative experiments in the laboratory, we have proved the effectiveness of the wireless intelligent detection system.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"8 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82362049","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: 0

Study on the Charge Dissipation Characteristics of the Gas-Solid Interface of the Nano-Coating of DC GIL Insulators 直流GIL绝缘子纳米涂层气固界面电荷耗散特性研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708085

Xiaoru Ni, Shuai Chang, Xin Ge, Tao Huang, Chenyu Hao, Lei Zhang

{"title":"Study on the Charge Dissipation Characteristics of the Gas-Solid Interface of the Nano-Coating of DC GIL Insulators","authors":"Xiaoru Ni, Shuai Chang, Xin Ge, Tao Huang, Chenyu Hao, Lei Zhang","doi":"10.1109/AEERO52475.2021.9708085","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708085","url":null,"abstract":"The gas-solid interface of the insulator is the weak link of the DC GIL insulation system, and the surface of the insulator is prone to charge accumulation. In this paper, SiC/Epoxy composite coatings with different nano-doping content were prepared and applied to the surface of the insulator. The results showed that when the content of nanofillers is low, the dispersion in epoxy resin is more uniform; the thermal stability of composite coating materials is significantly improved. As the content of nanoparticles increases, the surface charge dissipation of the insulator increases; but after a certain value, the surface charge dissipation rate will decrease, even lower than the dissipation rate of pure epoxy resin. When the content of nano-SiC is 6%, the surface charge dissipation speed of the sample is the highest, the charge dissipation rate is the highest, and the final dissipation is about 30% ~ 35%. Analysis suggests that when the content of nanoparticles is low, some shallow traps are introduced into the composite material, which reduces the energy level of the shallow traps, thereby increasing the dissipation rate of the charge. But when the content of nanoparticles is too high, due to factors such as agglomeration of nanoparticles, the distribution of shallow traps is changed.But the charge dissipation is inhibited.Based on the test results of the physical and chemical properties and electrical properties of the nanocomposite coating, a suitable nano-coating can be selected, which is of great significance for ensuring the safe and reliable operation of DC GIL.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"29 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78972745","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: 0

Comparison for Mechanical Properties of Transmission Towers in Uniform and Non-uniform Icing Condition under Micro-Topography 微地形条件下均匀结冰与非均匀结冰输电塔力学性能比较

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708374

Yi Wen, Zhihao Hu, X. Mao, Jianrong Wu, Huarong Zeng, Tao Yang, Chao Zhao

{"title":"Comparison for Mechanical Properties of Transmission Towers in Uniform and Non-uniform Icing Condition under Micro-Topography","authors":"Yi Wen, Zhihao Hu, X. Mao, Jianrong Wu, Huarong Zeng, Tao Yang, Chao Zhao","doi":"10.1109/AEERO52475.2021.9708374","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708374","url":null,"abstract":"Transmission towers may collapse because of ice accretion on transmission lines, which seriously threatens the safe and stable operation of power system. Digital twin can reflect the operation state of the device. The combination of finite element simulation, digital twin and online monitoring is helpful to realize the intelligent operation and maintenance of device. A 110 kV transmission lines under the micro-topography was taken as the research object in this paper. In the context of digital twin, a transmission tower-line system model with three-tower-two-line was established by finite element simulation. The mechanical properties of tangent tower and tension tower in uniform icing condition were compared and analyzed. It was found that the tangent tower was seriously stressed. The mechanical characteristics of the tangent tower under the conditions of uniform icing and non-uniform icing (including heavy iced on the short span and heavy iced on the long span) were simulated under a total of 27 operation conditions. The distribution of axial stress and nodal displacement were obtained. The mechanical characteristics of the transmission tower under the condition of uniform and non-uniform icing were compared and analyzed. The results showed that the axial stress may decrease first and then increase in the case of heavy iced on the short span of the tower. Compared with the heavy iced on the short span, the axial stress change rate of the tower with the long span is greater. Compared with uniform icing, non-uniform icing would increase the axial stress and nodal displacement of the towers, and increase the damage risk of the towers.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"152 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76011743","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: 0

State Evaluation System of Switchgear Based on Data Time-domain Processing and Feature Fusion 基于数据时域处理和特征融合的开关柜状态评估系统

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708093

Jiaqi Huang, Jianming He, Yongji Ma, Lijun Jin

{"title":"State Evaluation System of Switchgear Based on Data Time-domain Processing and Feature Fusion","authors":"Jiaqi Huang, Jianming He, Yongji Ma, Lijun Jin","doi":"10.1109/AEERO52475.2021.9708093","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708093","url":null,"abstract":"As an important equipment in the power system, it is necessary to detect the running state of high voltage switchgear to ensure its normal operation. But most of current state detection methods for switchgear take a single feature as the basis of fault diagnosis. Failure to make full use of defect information will easily lead to misjudgment and missed detection. In this paper, infrared (IR) and ultraviolet (UV) sensors are used to detect the temperature and partial discharge (PD) information of the insulated equipment in switchgear, which are collected by data acquisition card and transmitted to PC, then, wavelet denoising and sliding window median filtering are carried out on the temperature data to eliminate clutter and spikes on waveform. In order to avoid distortion of pulse width, amplitude and position caused by data processing, a peak-valley extraction and location algorithm is proposed to realize the time domain analysis and feature extraction of PD. And adaptive neuro fuzzy inference strategy (ANFIS) based on Takagi-Sugeno model is used to realize data fusion and state evaluation. Through testing, the accuracy of data processing and feature fusion method in fault warning and diagnosis of test data reaches more than 94%, and the judgment of the running state of electrical equipment is more accurate.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"6 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87641644","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

Research on Steady and Polarity Reversal Electric Field of Converter Transformer Considering Nonlinear Temperature Coefficient of Oil-paper Insulation 考虑油纸绝缘非线性温度系数的换流变压器稳态及极性反转电场研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708077

Yijia Li, Xinru Yu, Chengyu Zhang, Junping Zhao

引用次数: 0

Effects of Mechanical Stress on Cohesive Energy and Energy Level Distribution of Bisphenol-A Epoxy Resin 机械应力对双酚a环氧树脂黏结能和能级分布的影响

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708284

Pengxiang Guo, Jin Li, Chi Zhang, Ying Zhang, Jin He, Q. Tang, R. Zhao, X. Kong, Boxue Du

引用次数: 0

Transient Overvoltage Simulation on Wind Farm in Mongolia Under Lightning Strokes 雷击下蒙古风电场瞬态过电压模拟

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9707912

Chinges Tserensambuu, Qingmin Li, Jiyao Zhao

{"title":"Transient Overvoltage Simulation on Wind Farm in Mongolia Under Lightning Strokes","authors":"Chinges Tserensambuu, Qingmin Li, Jiyao Zhao","doi":"10.1109/AEERO52475.2021.9707912","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9707912","url":null,"abstract":"Direct lightning strokes on wind turbine blade is one of the reason that results in transient overvoltage of the electrical equipment. The previous researches have shown that transient overvoltage development which is effected by lightning current parameters could cause breakdowns in low voltage circuit and equipment. In recent years, Mongolia has built several wind farms in areas with high capacity of wind energy resources. However, there is still uncertainty in the behavior of lightning protection system, specifically on wind turbines located in high elevated areas with unavailable lightning parameters. Based on the literatures, the studies using PSCAD/EMTDC software are presented to model existing wind farm as a test set under the influence of peak current and waveforms. Existing WT’s was well protected from lightning, however the simulation showed that probable of lightning current with high amplitudes could produce transient overvoltage to the electrical components at the stricken tower and grounding system plays an important role for lightning protection.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"55 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82747970","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

Space Charge Characteristics under Harmonics of Oil-paper Insulation 油纸绝缘谐波下的空间电荷特性

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708123

Q. Zang, Wenjie Gong, Junyu Wei, Pan Geng, D. He, Qingquan Li

{"title":"Space Charge Characteristics under Harmonics of Oil-paper Insulation","authors":"Q. Zang, Wenjie Gong, Junyu Wei, Pan Geng, D. He, Qingquan Li","doi":"10.1109/AEERO52475.2021.9708123","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708123","url":null,"abstract":"This paper studies the charge behavior of the converter transformer under the DC superimposed harmonic electric field, analyzes the voltage waveform of the converter transformer’s valve side bushing, and uses the frequency domain analysis method to analyze the voltage waveform and harmonics of the converter transformer’s valve side bushing at different positions. Wave type and content. Using the electroacoustic pulse method charge measurement platform, the charge characteristics of oil-paper insulation under DC superimposed harmonic environment were studied. For the position of the bushing on the valve side of the high-pressure valve hall, the AC and DC ratios are 1:7 and 1:5 respectively, which are greatly affected by DC voltage. For the low-pressure valve hall, the AC and DC ratios are 1:3 and 1:1 respectively, which are greatly affected by the AC and harmonic electric fields. Based on the analysis of the voltage waveform, the study of the charge characteristics under AC and DC electric fields has been carried out. It is found that the surface charge has a large relationship with the field strength. Under the same polarization time, the surface charge increases significantly with the increase of the field strength, while the internal charge accumulation does not change. obvious. For the same phase moment, the change of charge density at different polarization times is similar to that under DC, but the change is relatively large.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"2016 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82788292","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: 0

Molecular Simulation-based Hardness Calculation of Graphene-reinforced Copper-tungsten Alloy Contacts 基于分子模拟的石墨烯增强铜钨合金触点硬度计算

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708168

Hanwen Ren, Zhiyun Han, Qingmin Li, Mengxi Wang, Haoxi Cong

引用次数: 0

Progress in Weak Discharge Detection Based on PMTs 基于pmt的弱放电检测研究进展

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708130

Y. Jiang, Weilan Wang, Xuan Li, Changzhu Wang

引用次数: 0