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

{"title":"Simulation of Temperature and Humidity Distribution inside Mechanism Case for GIS and Research on Moisture Proof and Waterproof Methods","authors":"Ruodong Huang, Chao Gao, F. Zhou, Guichan Liu, Yunguang Huang, Jianing Peng","doi":"10.1109/AEERO52475.2021.9708268","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708268","url":null,"abstract":"Condensation and moisture inside Gas insulated switchgear (GIS) mechanism case are the main problems that threaten the operation condition of GIS, which may cause the defeat of equipment insulation, thereby short-circuit, grounding fault and other faults. However, there is a lack of definition and standard between condensation distribution and temperature and humidity, and effective measures to eliminate condensation. This paper researches distribution of temperature and humidity inside the mechanism case under typical conditions through simulation, and change regularity of humidity of mechanism case with various structure under the influence of different wind velocity. Based on the research results above, this paper proposes the method of moisture proof and waterproof inside mechanism box, through improving sealing of mechanism case and moisture dispelling.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"45 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":"83771928","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":"Spatial Electric Field Characteristics in Large-scale Oil-pressboard Insulation Structure under Impulse Voltage","authors":"Shuqi Zhang, Ke Zhu, Lin Wang, C. Gao, B. Qi, Chenxing Ding","doi":"10.1109/AEERO52475.2021.9708162","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708162","url":null,"abstract":"The reliable manufacture of the oil-pressboard insulation system of converter transformer largely depends on numerical calculation and electric field measurement under the simple equivalent model. It lacks electric field measurement verification under large-scale complex structure. The electric field characteristics in the large-scale valve-side outlet device model of the ± 800kV converter transformer under impulse voltage with different voltage amplitudes and different wavefront times was obtained in this paper. The actual measurement results show that the value of field intensity in three transformer oil-spacing will increase with the rise of the applied voltage amplitude. The peak value of field intensity in transformer oil-spacing would decrease with the rise of wavefront time. In the same oil-spacing, the closer the measuring point to the electrode of applied voltage, the bigger the peak value of field intensity, but the maximum deviation is about 3.61%, which may be due to the little accumulation of interface charge under lightning impulse voltage.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"185 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":"81061545","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":"Modelling and Stability Analysis for a Variable Speed DC Tidal/Wind Turbines with MPPT in Low Voltage DC Microgrid","authors":"W. Nassar, O. Anaya‐Lara","doi":"10.1109/AEERO52475.2021.9708391","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708391","url":null,"abstract":"DC Microgrid is a new candidate for Multi-Purpose Platforms (MPP) which highly supported by the international community for sustainably exploiting our oceans. Considering DC-systems for the MPP requires all renewable energy sources to be interfaced to a DC-bus. Wind turbines as proven developed energy for offshore use is a crucial energy source for MPP. Normally, a wind turbine in a DC-environment uses a diode rectifier for interfacing to the grid and a DC-DC boost or buck converter for extracting maximum power. Previous studies included wind turbine in a DC-microgrid did not analyze the turbine stability with wind variations. Moreover, tidal turbines, as an immature technology, are rarely considered in such DC-systems. So, this paper provides a modelling and stability analysis for a wind/tidal turbines based Permanent Magnet Synchronous Generator (PMSG). A linearized small-signal model is derived for a wind/tidal turbines based PMSG and boost converter. Two control loops are used for speed and current control. Stability analysis shows that the controller can effectively keep the system stable under wind/tidal speed variations. Simulation analysis is carried out to shows the effectiveness of the controller at various speeds considering tidal and wind turbines.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"11 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":"81188249","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":"Research on Multi-mode Control Strategy of High-Power Three-port Photovoltaic DC Converter","authors":"Ke Li, Yibo Wang, Junlong Lu, Li-dong Guo, Jiewei Wu, Huan Wang","doi":"10.1109/AEERO52475.2021.9708322","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708322","url":null,"abstract":"This paper mainly designs the multi-mode coordinated control strategy of high-power three-port photovoltaic DC converter. In this paper, the operation mode of the converter is divided into independent operation mode and grid-connected operation mode, and the control strategy of different working conditions under the two operation modes is designed respectively, under different working conditions, the photovoltaic port can achieve the maximum power point tracking (MPPT) and the stability control of the intermediate bus voltage. In addition, the topology used in this paper includes LLC converter, and the power transmission efficiency is improved by rationally designing the value of excitation inductor Lm. The simulation and the experimental results both verify the reliability of the multi-mode coordinated control strategy, and the online automatic switching experiment under different operating conditions further verifies the effectiveness of the control strategy.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"11 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":"87449082","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":"Influence Analysis on Defects in Bushing Core at Grid Side of Converter Transformer","authors":"Qingsong Wu, Lilan Liu, Tianxi Xie, X. Ning, Peng Liu, Zongren Peng","doi":"10.1109/AEERO52475.2021.9708235","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708235","url":null,"abstract":"The high voltage bushing on the grid side of UHV converter transformer is located at the connection position between the grid side winding of converter transformer and the AC side system, which is the key equipment of UHVDC transmission system. In actual operation, the bushing will bear high temperature, large load current and additional load for a long time. In addition, due to the limitation of process level. During the rolling process of bushing capacitor core, there are inevitably some defects such as plate wrinkle, plate offset and unreliable grounding of the end plate. Under the long-term action of electricity, heat and stress, small defects are likely to develop into larger defects or even cause faults. Therefore, it is of great significance to study the influence of different defects on the electric field distribution in the bushing core and the partial discharge initial voltage (PDIV) of the bushing. On the basis of 550kV capacitive bushing, this paper designed and manufactured four scaled models. The rated working voltage of scaled models are 31.8kV. And the corresponding finite element simulation models are also established. The simulation results show that the wrinkle defect and offset defect will cause serious electric field distortion, resulting in a sharp increase of electric field at the defect. Ungrounded defects will completely change the distribution of electric field in the bushing, making the electric field concentrated in the insulating oil between the flange and the end plate. The measurement of PDIV shows that the wrinkle defect and offset defect can significantly reduce the PDIV which makes the bushing prone to PD at a lower voltage level and lead to fault. The initial voltage drop of ungrounded partial discharge is less, but the discharge amount is large. Therefore, the research of this paper has guiding significance for timely finding the original defects of bushing, preventing the development of defects, and solving the problem of frequent failure of converter bushing.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"9 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":"88195423","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":"Analysis of Fire Spread in High Voltage Cable Trench under Different Cable Laying Modes","authors":"Ho-Dong Yang, L. Zou, Xiaolong Wang, Zhiping Song, Y. Duan, Hao Zhang","doi":"10.1109/AEERO52475.2021.9708366","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708366","url":null,"abstract":"With the continuous development of the power system, high voltage cable channel is widely used in urban construction, and becomes an indispensable part of power grid construction. However, in recent years, frequent cable fire accidents have seriously affected the safe operation of power grid, resulting in huge economic losses and even casualties. The proper layered laying of cable trench can play an important role in restraining fire spread and reducing the risk of cable burning. Based on the fire simulation software, this paper establishes the fire simulation model of underground high-voltage cable trench in substation, analyzes the change of temperature field and gas distribution in high-voltage cable trench by simulating the fire spread trend of two common cable laying modes, and draws the following conclusions: four layer cable laying mode is better than five layer cable laying mode, and four layer cable laying mode is better after the fire The method can effectively slow down the spread of fire, lower toxic gas concentration and better temperature field stability. At the same time, the temperature field and the distribution of toxic gas concentration are also found to be stratified. These conclusions are of great significance to reduce the loss of cable fire and to ensure the safety of fire fighters after the disaster.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"1 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":"86667946","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 Energy Wind Power Development Status and Future Trends","authors":"C. Sun, Junkang Chen, Z. Tang","doi":"10.1109/AEERO52475.2021.9708186","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708186","url":null,"abstract":"In order to better understand development status of wind power generation in various countries in the world and provide a reference for future research, first introduced the current development status of wind power, including the newly added offshore wind power, cumulative installed capacity, and onshore wind power newly added and cumulative Installed capacity; then introduced and analyzed the current difficulties in wind power generation; finally analyzed the development prospects of wind power, focusing on the future development trend of wind power. The research results show that wind power has broad development prospects and will develop in the direction of large-scale in the near future.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"211 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":"77299336","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":"Key Technology of Nondestructive Testing of Solid Insulating Materials in Power Equipment","authors":"Wang Liwei, Du Jianhua, Zhang Ning","doi":"10.1109/AEERO52475.2021.9708120","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708120","url":null,"abstract":"Power system is the center of modern society, but there are always various faults in the process of power system operation. Detection technology is very important for the good operation of power system. Nondestructive testing technology, as a special part of detection technology, has broad development prospects. This paper mainly focuses on the four common nondestructive testing methods of X-ray, ultrasound, CT and partial discharge in nondestructive testing technology, analyzes and prospects the current research status from different angles such as the characteristics, innovation and detection system of testing methods, summarizes the current research progress, and looks forward to the frontier problems in the future.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"1 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":"91341936","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":"Research on Mechanical Model of Pipe Laying and Position Computing of 3D Date Set of High-Voltage Power Cable","authors":"J. Cui, W. He, H. He, Cheng Zhang, Zhuojia Li, Junxuan Hong, Juntao Yan","doi":"10.1109/AEERO52475.2021.9708375","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708375","url":null,"abstract":"With the technology maturity of horizontal directional drilling, pipe laying has become widely used for underground power transmission engineering construction. But, a unified mechanical model of pipe laying has not been established so far, deformation remains a frequent complication of sheath and insulation of high-voltage power cable due to traction accuracy that can not be guaranteed. Based on analysis of horizontal directional drilling characteristics, the mechanical model of pipe laying and the calculation formula of traction of cable were proposed and the determination method of model separation and classification was discussed, in which position computing of 3D date set by space vector theory was adopted. The feasibility and necessity of the model were verified by 110kV engineering example. The result indicated that not only the model can precisely predict traction of high-voltage power cable with less dispersion, its application can well avoid deformation of high-voltage power cable during cable lying.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"471 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2021-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75200334","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":"A Deep-Learning-Based Hyperspectral Detection Method of Porcelain Insulator Crack","authors":"Yiming Zhao, Xinyu. Ye, Jielu Yan, Q. Jing","doi":"10.1109/AEERO52475.2021.9708223","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708223","url":null,"abstract":"Porcelain insulator is an important insulating part of power system. It is easy to crack under mechanical action. If the crack is not found in time, the crack will gradually expand, and the insulating performance of the insulator will decline, and discharge accidents will occur easily. Therefore, online porcelain insulator cracks monitoring methods are needed to ensure the safe and reliable operation of power grid. However, most of the existing detection methods require offline detection and the efficiency is low. In this paper, a porcelain insulator crack detection model combining hyperspectral image and deep learning method is proposed. The results show that this method can not only meet the requirements of online non-contact detection, but also achieve high recognition accuracy.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"43 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":"75142554","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}