2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)最新文献_第5页

Study on Space Charge Characteristics of XLPE at Different Temperature Gradients 不同温度梯度下交联聚乙烯空间电荷特性的研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708083

G. Wang, Yiyi Zhang, Jiefeng Liu, Shiyou Wu, Senshen Pang, Xinyang Mao

{"title":"Study on Space Charge Characteristics of XLPE at Different Temperature Gradients","authors":"G. Wang, Yiyi Zhang, Jiefeng Liu, Shiyou Wu, Senshen Pang, Xinyang Mao","doi":"10.1109/AEERO52475.2021.9708083","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708083","url":null,"abstract":"As the main insulation material of DC cable, the insulation performance of crosslinked polyethylene(XLPE) directly affects the safety of cable operation, and the existence of space charge will lead to the distortion of field strength. Due to the temperature difference between the inner and outer layers of XLPE cables during operation, few studies have reported the effect of temperature gradient on the space charge distribution. Therefore, this paper establishes a two-dimensional model of the DC XLPE cable by means of numerical simulation, couples the temperature-electrostatic-charge multi-physical fields, simulating the space charge distribution based on the bipolar carrier transport (BCT) model, and considering the influence of temperature gradient on the results. In this paper, the charge distribution at the temperature gradient of 0 K and 15 K in the inner and outer layers of XLPE is studied. The results show that under different temperature gradients, the significant changes of charge mobility and charge rate injected from the electrodes result in a great difference in the charge distribution characteristics. The charge migration velocity on the side with higher temperature is faster than the charge injection depth on the side with lower temperature. The higher the temperature gradient, the greater the distortion rate of the field strength, so the more likely the insulation failure of the cable will occur.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"1 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":"89805807","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 Leakage Flux Control and Stray Loss Calculation on Metal Structure of Ultra High Voltage Autotransformer with Large Capacity 大容量特高压自耦金属结构漏磁控制及杂散损耗计算研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708238

Xiangdong Yu, Yang Yu, Jian-wen Xu, Yong Liu, Renlei Liu, Xiaoyang Zhang

引用次数: 1

Simulation of Charge Transport Characteristics of Polypropylene 聚丙烯电荷输运特性的模拟

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708084

Yang Li, Z. Tang

引用次数: 0

Research on Design and Application of Portable UHV Zero Value Insulator Detection Device 便携式特高压零值绝缘子检测装置的设计与应用研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708194

Xueming Zhou, Danhui Hu, Zijian Li, Zhiqiang Feng, Yaodong Zhang, Tianru Shi

{"title":"Research on Design and Application of Portable UHV Zero Value Insulator Detection Device","authors":"Xueming Zhou, Danhui Hu, Zijian Li, Zhiqiang Feng, Yaodong Zhang, Tianru Shi","doi":"10.1109/AEERO52475.2021.9708194","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708194","url":null,"abstract":"The regulations require that when installing UHV porcelain insulators, the insulation resistance should be measured with an insulation resistance meter no less than 5000V, and the resistance value of the insulator should be no less than 500M $Omega$ under dry conditions. Traditional insulator zero detection methods include insulation resistance meter, simple pulse device, spark fork method and voltage distribution method. Due to the above methods, the test voltage is too low, the device is bulky, the operation is complicated, or the accuracy is greatly affected by the external environment, resulting in unsatisfactory application effects. For this reason, this article mainly studies a portable insulator zero value test device, and meets the following technical requirements: output voltage above 60kV, deviation less than 5% test range 0 $sim$ 5000M $Omega$, resolution: 1M $Omega$, error no more than 10 % weight no more than 3kg; The number of continuous use of a single charge of the power supply is not less than 5000 times. The device is small and portable, with high accuracy, which is able to detect the insulators one by one without dismantling the wooden crates.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"40 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":"76477169","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

Temperature Field Simulation and Ampacity Optimization of 500kV HVDC Submarine Transmission Cable 500kV高压直流海底输电电缆温度场仿真及容量优化

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708347

Umer Farooq, Fan Yang, J. Shaikh, M. S. Bhutta, Farooq Aslam, Wu Tao, Liao Jinxian, I. Haq

{"title":"Temperature Field Simulation and Ampacity Optimization of 500kV HVDC Submarine Transmission Cable","authors":"Umer Farooq, Fan Yang, J. Shaikh, M. S. Bhutta, Farooq Aslam, Wu Tao, Liao Jinxian, I. Haq","doi":"10.1109/AEERO52475.2021.9708347","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708347","url":null,"abstract":"The HVDC submarine power cables have complex structure and needs extraordinary manufacture process requirements. The HVDC submarine cable in an offshore wind farm usually goes through multiple laying sections with different laying environment. And in some of the sections, the heat dissipation condition may be unfavorable. To improve the safety of the transmission line, it is obligatory to study the cable temperature field and ampacity of power cable under different laying conditions and find the bottleneck sections, together with the methods to improve the ampacity of these weak sections. A 500kV XLPE submarine power cable is taken as the study object, the finite element modeling (FEM) is used to study the electromagnetic thermal coupling model of the submarine cables laying in the soil without trench, in the tube with water flowing for the purpose of forced cooling at beach section is established respectively to study the temperature field and ampacities by using COMSOL Multiphysics software. The results indicate that, water circulating in the tube would affect the cable heat dissipation and significantly ampacity is increased. Moreover, it has been noted that when the water flow rate is 2.78 L/s in the tube, the ampacity of cable is optimum and by the implementation of this proposed model the ampacity can be increased up to 650A.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"23 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":"83534424","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

Power Entity Information Recognition Method Based on Bi-LSTM+CRF 基于Bi-LSTM+CRF的电力实体信息识别方法

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708243

Junhua Hu, Chen Jiang, Guo-ming Ma, Jing Ding, Yawen Wang, Jiquan Xu, Yuan Wang

{"title":"Power Entity Information Recognition Method Based on Bi-LSTM+CRF","authors":"Junhua Hu, Chen Jiang, Guo-ming Ma, Jing Ding, Yawen Wang, Jiquan Xu, Yuan Wang","doi":"10.1109/AEERO52475.2021.9708243","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708243","url":null,"abstract":"During the long-term operation, power companies have accumulated a large amount of text-based data in the form of natural language. In these text-based data, entities are key semantic units, including faulty equipment, locations, phenomena, etc. The extraction of these entities is the basic work for the construction of electrical knowledge graph and faults diagnosis. However, due to the unstructured form of text-based data, it is difficult to extract entities automatically. This paper introduced a deep learning model for power entity information entity extraction, using each Chinese character as the basic unit, and employing the Word2vec model to convert each character into a vector containing contextual semantic information. Then the vector is introduced into the Bi-LSTM (Bidirectional-Long Short Term Memory) network model. In addition, the transition probability between them are comprehensively considered in the Conditional Random Field (CRF) layer. So the best tag sequence of the sentence are obtained. In the case analysis, the entities of 550 onsite text-based data was extracted. The F1 value of the extraction results was higher than that based on the power dictionary and matching scheme.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"51 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":"84827488","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: 2

Statistical Analysis and Discharge Type Identification of Partial Discharge Pulse Parameters of Oil-Paper Insulation Based on Ultra-wideband 基于超宽带的油纸绝缘局部放电脉冲参数统计分析及放电类型识别

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708361

Xinbo Lu, Kaining Hou, Qingquan Li, W. Si, C. Fu

{"title":"Statistical Analysis and Discharge Type Identification of Partial Discharge Pulse Parameters of Oil-Paper Insulation Based on Ultra-wideband","authors":"Xinbo Lu, Kaining Hou, Qingquan Li, W. Si, C. Fu","doi":"10.1109/AEERO52475.2021.9708361","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708361","url":null,"abstract":"The effective measurement frequency band of the traditional pulse current method is up to 1MHz, which causes the loss of the main energy frequency band information of the partial discharge pulse signal. In view of this, an ultra-wideband partial discharge pulse measurement system with an effective measurement frequency band of 30kHz-50MHz is designed. The system is used to measure the discharge signals of three types of oil-paper insulation defect models built under laboratory conditions, in order to obtain statistical characteristics that can characterize different types of partial discharge pulse parameters of oil-paper insulation. The results show that: the ultra-wideband partial discharge pulse measurement system can restore the original characteristics of the partial discharge waveform to a greater extent, which is conducive to the accurate analysis of the characteristics of the partial discharge pulse; the measured parameters of different types of partial discharge pulses have different statistical characteristics. Using discharge pulse rise time, fall time, 50% pulse width and 10% pulse width as input characteristic parameters to identify partial discharge types can achieve better results.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"60 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":"87637365","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 the Solution to Metrology Testing and Traceability System Solution for Digital Electrical Metering System 数字电计量系统计量检测溯源系统解决方案的研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708261

Xiao-xing Mu, Zhengqi Tian, Meimei Duan, Zengkai Ouyang, Guofang Xia, Zigang Lu, Chao Zhou

{"title":"Research on the Solution to Metrology Testing and Traceability System Solution for Digital Electrical Metering System","authors":"Xiao-xing Mu, Zhengqi Tian, Meimei Duan, Zengkai Ouyang, Guofang Xia, Zigang Lu, Chao Zhou","doi":"10.1109/AEERO52475.2021.9708261","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708261","url":null,"abstract":"In order to solve both the testing and the “tracing” problems of digital electricity meter, the concepts and equipment of “Analog Merging Unit”, “Computational Analog Reference Meter”, “Digital Synthetic Analog Power Source” was introduced, and three kinds of thorough testing methods, i.e., “Standard Source Comparison Method”, “Reference Meter Comparison Method”, and “Comprehensive Comparison Method”, as well as the corresponding complete standard transfer & “tracing” systems was provided. By doing so, the testing and the “tracing” of digital electricity meter can be reasonably included into the standard transfer & “tracing” system of the traditional watt-hour meter, so that digital electrical energy metering can adopt the analog metering system completely. Then, technical problems of the testing and the “tracing” of digital electricity meter can be solved concisely, scientifically, and economically. The unity of digital and analog electrical energy metering systems, inherits the uninterrupted continuity, stability, and seriousness of the standard transfer & “tracing” system of electrical energy metering, and has certain logic, rationality and conscientiousness, and also reduces the risk of digital power energy metering system. Getting rid of the “digital” part during digital electrical energy metering process is an innovation and development for electrical energy metering technology.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"111 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":"91004309","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

Numerical Simulation on the Distribution of Ion Flow near Wind Turbine Under Thundercloud 雷云下风力机附近离子流分布的数值模拟

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708278

Jiyao Zhao, Wanshui Yu, Qingmin Li

{"title":"Numerical Simulation on the Distribution of Ion Flow near Wind Turbine Under Thundercloud","authors":"Jiyao Zhao, Wanshui Yu, Qingmin Li","doi":"10.1109/AEERO52475.2021.9708278","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708278","url":null,"abstract":"Lightning damage is a huge threat to wind turbine, which influences the safe operation of wind turbine. There are some applications of lightning protection system (LPS) on wind turbine, especially on wind turbine blades. However, the rotation of wind turbine will influence the distribution of charged ions near blade tip, increasing the difficulty of full lightning protection on wind turbine. In this paper, 2-D drift and convection model coupled with Poisson equation of charged particles near wind turbine blade under thundercloud was established, based on which the distribution of glow corona ions near blade tip was calculated. The influence of blade rotation and polarity effect were further studied. As a result of the rotation, the high density of charged ions accumulates like arc shape at the side in the negative rotating direction. And the positive ions have an effect on the electric potential making it invert to positive mainly at the same direction. Under positive thundercloud, positively charged particles distort the field and have a shielding effect on the electric field, so that the upward leaders under negative thundercloud are easier to initiate.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"34 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":"73444555","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

Research on Control Strategy of Servo Motor Used to Drive High Voltage Circuit Breaker 高压断路器伺服电机驱动控制策略研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708101

Fei Yan, Baoying He, Yu Liu, Jianying Zhong, Shengwu Tan, Dawei He, Jiayuan Xu, Rui Yang

{"title":"Research on Control Strategy of Servo Motor Used to Drive High Voltage Circuit Breaker","authors":"Fei Yan, Baoying He, Yu Liu, Jianying Zhong, Shengwu Tan, Dawei He, Jiayuan Xu, Rui Yang","doi":"10.1109/AEERO52475.2021.9708101","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708101","url":null,"abstract":"Motor-drive high voltage circuit breaker (HVCB) is becoming a research hotspot because of the high mechanical reliability, the controllability of the whole process of movement, and the potential to realize intelligence. However, the application in high voltage level is constrained due to the requirement of large energy output within a short period. To increase motor torque, improve torque utilization and reduce consumption of hardware resource, the simplified algorithm of maximum torque per ampere (MTPA) is proposed in this paper. For this reason, the mathematical model of permanent magnet synchronous motor (PMSM) is introduced, and the exact algorithm of MTPA and the simplified one are derived respectively. The adams/simulink co-simulation model of HVCB driven by servo motor is established and the experiment platform is built in order to verify the effectiveness of the simplified MTPA(S-MTPA),. The conclusion that the control accuracy of S-MTPA can meet the requirements of HVCB is proved by the results of simulation and experiment.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"58 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":"85160355","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