2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)最新文献_第8页

Study on Characteristics of Partial Discharge Caused by Micro-bubble in Insulating Oil 绝缘油中微气泡局部放电特性的研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708212

M. Gao, Lin Ke, M. Fu, Hongbin Zhou, Lu Cai, Neng Wang, Jianxin Wang, Baojun Zhao

{"title":"Study on Characteristics of Partial Discharge Caused by Micro-bubble in Insulating Oil","authors":"M. Gao, Lin Ke, M. Fu, Hongbin Zhou, Lu Cai, Neng Wang, Jianxin Wang, Baojun Zhao","doi":"10.1109/AEERO52475.2021.9708212","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708212","url":null,"abstract":"In the last few decades, Bubbling phenomenon grows to be a major concern for its insulation threats in oil-immersed facilities during dynamic rating or overloading. Formed bubbles with radius from tens to hundreds um could lead to partial discharge or even serious insulation failure. However, previous studies on bubble-induced discharge in insulating oil usually focused on millimeter size bubbles. The research to date has not been able to determine the real threat of micro-bubbles of tens to hundreds um of in oil. In this paper, the characteristics of partial discharge induced by micro-bubbles were investigated. The finding is unexpected and suggests that partial discharge inception electric field strength is significantly higher than the theoretical value, which shows tiny change with variation of bubbles radius. Besides, bubble radius is a significant factor on the number of partial discharge current pulses and the apparent charge. The number of current pulses induced by a single bubble could help to reveal the interaction mechanism between bubbles and discharges. Finally, the equation associating the apparent charge and bubble radius was fitted.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"17 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":"80181841","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 Temperature Distribution and Insulation Performance of Epoxy Resin Impregnated Paper Bushing Model 环氧树脂浸渍纸衬套模型温度分布及绝缘性能研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708237

Han Zhang, Zuoming Xu, B. Wan, Wei Hu, Xiongjie Xie, P. Yin

{"title":"Study on Temperature Distribution and Insulation Performance of Epoxy Resin Impregnated Paper Bushing Model","authors":"Han Zhang, Zuoming Xu, B. Wan, Wei Hu, Xiongjie Xie, P. Yin","doi":"10.1109/AEERO52475.2021.9708237","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708237","url":null,"abstract":"In order to study the relationship between current carrying heat and insulation performance of epoxy resin impregnated paper (RIP) bushing, the RIP bushing model is researched in this paper, the internal temperature and insulation characteristics of the bushing model are measured under the same conditions. The internal heating and heat transfer laws under different current are studied. The change rule of dielectric loss factor (tan$delta$), capacitance and frequency domain spectroscopy are analyzed at the same time. In order to obtain the insulation information carried by the frequency domain spectroscopy in the limited measurement frequency band, the frequency domain dielectric characteristic $S_{tandelta}$ which can quantify the maximum operating temperature of the RIP bushing is extracted in this paper, and gives the fitting relationship between the characteristic parameters and the maximum temperature. The results show that greater current causes more heat release from the resistance and greater temperature gradient inside and outside the bushing; When the current is 1000A, Tmax = 55°C for 4 hours, and when the current is 1200A, Tmax = 58°C for 2 hours, reaching the “critical point” temperature of the tan$delta$ value of the bushing model, the tan$delta$ value will decrease first and then increase with the increase of the current loading time; The tan$delta$ frequency spectroscopy curve shifts to high frequency region with the increase of current; The extracted characteristic parameters are sensitive to temperature in 5mHz~50Hz, $S_{tandelta}$(50) has the high goodness of fitting function relationship with the maximum operating temperature, which can be applied to evaluate the maximum operating temperature of RIP bushing. The test results can provide reference for the non-destructive monitoring of the RIP bushing.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"48 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":"91023269","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

The Defective Causes Analysis for a Batch of Current Transformers Based on Simulation Tests 基于仿真试验的一批电流互感器缺陷原因分析

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708394

Qiong Wang, Bo Yang, Jin Guan, Bingjie Dou, W. Yang, Chuanqiang Che

{"title":"The Defective Causes Analysis for a Batch of Current Transformers Based on Simulation Tests","authors":"Qiong Wang, Bo Yang, Jin Guan, Bingjie Dou, W. Yang, Chuanqiang Che","doi":"10.1109/AEERO52475.2021.9708394","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708394","url":null,"abstract":"Recently, quality problems were found successively in more than ten current transformers (CTs), which were produced in a same batch, in Guangming switch station of Inner Mongolia province. Both the capacitance and dielectric loss did not meet the requirement of criteria. And the contents of dissolved gas in oil in those CTs exceeded the warming value. In order to explore the formative reasons of defects, the characteristics of defects in this batch of the transformers were sorted firstly. A typical CT which was used to be installed at an A-phase outgoing of the No.159 interval was selected for disassembly analysis. However, no abnormality was found in all parts of the transformer during the disassembling process. In view of this, two defective models were prepared by using the LB6-IIOW type of transformers separately. One of them was improper dried whereas the other was simply oil-immersed without using vacuum. The development process of defects in current transformer was studied. The simulation test showed that under the external applied voltage and current stresses, the capacitance and dielectric loss of models increased rapidly. And the dissolved gases were produced very fast in oil. H2 is the dominating dissolved gas followed by CH4. A small amount of C2H2 could be also found in oil. It was believed that the unsatisfactory vacuum immersion oil is the main cause for the failure of this batch of CTs. Based on this research, corresponding technical suggestions were put forward.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"129 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":"85748656","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

Experimental Study on Corona Characteristics of Ball-Plate Electrode under High Humidity 高湿条件下球板电极电晕特性的实验研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708262

Liang Xie, Yunxiang Cui, Hongjian Luo, G. Hua, Yunpeng Liu, Song Gao

{"title":"Experimental Study on Corona Characteristics of Ball-Plate Electrode under High Humidity","authors":"Liang Xie, Yunxiang Cui, Hongjian Luo, G. Hua, Yunpeng Liu, Song Gao","doi":"10.1109/AEERO52475.2021.9708262","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708262","url":null,"abstract":"In order to deeply study the corona problem of power fittings in high-humidity areas, an artificial humidity climate chamber was designed to conduct corona experiments on the ball-plate electrode under high humidity. During the experiments, the photon number of the ball electrode with different humidity and voltage was recorded by the ultraviolet imager. The corona initiation voltage experiments at relative humidity of 50%, 60%, 70%, 80%, 90% and 97% are conducted respectively. Under the high humidity condition of 97% with the condensing state, the corona initiation voltage experiment also was taken to compare with non-condensing state. Finally, the influence of each stage of the dewdrop development process on the electric field is analyzed through electric field simulation. The experimental results show that as the humidity gradually increases from 50% to 97%, the ball electrode’s corona initiation voltage drops from 97.5kV to 48kV decreasing of 50.7%. When the humidity is 97%, the corona initiation voltage of the ball electrode with condensation is 29.6% lower than that without condensation. Under the same voltage, the number of photons at the moment of the dew drop is the largest. In the electric field simulation analysis, as the accumulation degree of the dew drop increases, the distortion of the electric field increases, the electric field distortion is the most serious when the dew drops is consistent with the maximum number of photons in the experiment.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"468 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":"85790134","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

Analysis and Development of Short Circuit Capability of 400MVA/500kV Single Phase Autotransformer 400MVA/500kV单相自耦变压器短路能力分析与开发

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708325

Zho Li, Yong Li, Yanghong Tan, Shubo Sun, Qiang Ou, Shaoyang Wang

{"title":"Analysis and Development of Short Circuit Capability of 400MVA/500kV Single Phase Autotransformer","authors":"Zho Li, Yong Li, Yanghong Tan, Shubo Sun, Qiang Ou, Shaoyang Wang","doi":"10.1109/AEERO52475.2021.9708325","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708325","url":null,"abstract":"At present, 400MVA is the largest capacity transformer with 500kV voltage level in the world for sudden short circuit test. This paper introduces the basic parameters and development structure of the short-circuit prototype with 400MVA/500kV single-phase autotransformer. Based on the electromagnetic force characteristics, the ability to withstand short circuit of high voltage-medium voltage (HV-MV) and medium voltage-low voltage (MV-LV) is analyzed and checked. Compared with the short circuit force of 110kV and 220kV transformers prototype, the short circuit characteristics of 500kV autotransformer are analyzed, and the control strategy is put forward from the material, design and manufacturing technology. Finally, the prototype is verified by the sudden short circuit test of HV-MV and MV-LV modes. The test results show that: the prototype successfully passed the strong current impact, and the test results and various indicators are qualified, which further demonstrates the accuracy of the anti-short-circuit check and the prototype’s strong short-circuit resistance.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"1 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":"90268619","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

Analysis of Electrical Tree Growth and Partial Discharge Stagnation in Epoxy Resin 环氧树脂中电树生长和局部放电停滞的分析

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708171

Z. Zhang, Shusheng Zheng, Shiyou Wu, Dongchen Liu, Anxu Guan, Aixu Zhong

{"title":"Analysis of Electrical Tree Growth and Partial Discharge Stagnation in Epoxy Resin","authors":"Z. Zhang, Shusheng Zheng, Shiyou Wu, Dongchen Liu, Anxu Guan, Aixu Zhong","doi":"10.1109/AEERO52475.2021.9708171","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708171","url":null,"abstract":"The aging of electrical branch tree is an important cause for the degradation of the insulation performance of cable accessories. There are many studies on the electrical tree of epoxy modified materials, but there are few reports on the phenomenon of partial discharge (PD) stagnation of epoxy resin electrical tree. In this paper, an “integrated” epoxy resin needle-board model is made to produce electric tree. The effect of radius of curvature of the needle tips on electric tree is studied, include tree initial voltage, tree growth morphology, tree growth rate and partial discharge intermittent phenomena of electric tree. A set of experimental platform was built, and the detection sensitivity of partial discharge can reach 0.1pC. The test results show that: the larger the radius of curvature of the needle tip of the steel needle, the higher the tree initial voltage, and the higher the probability that it will develop into a vine-shaped electrical tree. The smaller the radius of curvature of the needle tip of the steel needle, the lower the tree initial voltage, and the greater the probability that it will develop into a branch-like electrical tree. The vine-shaped electrical tree has a partial discharge “stay period”, about ten minutes, while the branch-shaped electrical tree does not have a more obvious discharge stagnation phenomenon.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"22 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":"90660903","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

Comparison of Water Adsorption Effect Between Zeolite 3A and 4A in Transformer Oil 3A和4A沸石在变压器油中的吸附效果比较

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708395

Yong Sun, J. Yang, Jianping Li, Yukun Ma, F. Jia, Zhe Hou, Xiao Yang, B. Qi

引用次数: 0

Power system security assessment based on real-time electromagnetic-electromechanical transient hybrid simulation 基于实时电磁-机电暂态混合仿真的电力系统安全评估

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708365

X. Xiong, Yuyao Feng, Le Zhao

引用次数: 0

Carbon Emission Peak and Carbon Neutrality under the New Target and Vision 新目标与新愿景下的碳排放峰值与碳中和

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708209

A. Runa, Zhiyong Zhang, Han Zhang

{"title":"Carbon Emission Peak and Carbon Neutrality under the New Target and Vision","authors":"A. Runa, Zhiyong Zhang, Han Zhang","doi":"10.1109/AEERO52475.2021.9708209","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708209","url":null,"abstract":"At the General Debate of the 75th Session of The United Nations General Assembly in Beijing, on September 22, 2020, Xi Jinping, the President of the People’s Republic of China, has announced the target of peaking the carbon emission and the vision of carbon neutrality to the world. The establishment of Carbon Emission Peak and carbon neutral target puts forward new requirements for science and technology innovation, especially the overall layout and development direction of technology. Firstly, the carbon-neutral vision indicates that the intensity of emission reduction will change profoundly in the future. Secondly, the proposed carbon-neutral vision will have a huge impact on the energy supply side and the consumption side. It needs not only the positive response of the consumption side sector, but also the active adjustment of the energy supply side sector. Carbon was at peak, carbon neutral, commitment and decision deployment, demonstrates the strong determination to actively respond to climate change in China, reflects the push our country building bear the responsibility of the community of human destiny, shows that our country actively advocating outbreak after boosting economic “green shoots” of attitude, to play an important role in coping with global climate change.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"93 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":"83841061","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

Research on Modular and Intelligent Design of High Voltage Circuit Breaker Mechanism 高压断路器机构模块化与智能化设计研究

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708271

Yi Su, Shuai Zhang, Linjie Zhao, Zhibiao Xie, Zaixing Peng, Song Wang

{"title":"Research on Modular and Intelligent Design of High Voltage Circuit Breaker Mechanism","authors":"Yi Su, Shuai Zhang, Linjie Zhao, Zhibiao Xie, Zaixing Peng, Song Wang","doi":"10.1109/AEERO52475.2021.9708271","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708271","url":null,"abstract":"For the power system, in addition to the need for a circuit breaker to start protection to cut off the circuit when the equipment or line fails, other power outages are hoped to be avoided. At this stage, the mechanism replacement of the circuit breaker and the isolating switch still needs to be performed in the case of power failure, and the degree of modularity of the product is not high. Therefore, the modular design of the high-voltage switch not only has the value of technical research, but also has very important practical application value. In this article, we have studied a modular and intelligent scheme of circuit breaker mechanism. The integrated transformation plan of the secondary system of the circuit breaker mechanism is proposed according to the function. A scheme to ensure the output consistency of the circuit breaker mechanism is proposed to ensure the interchangeability between different mechanisms. And the monitoring IED for the breaker mechanism is designed. It has a good promotion for the digital development of circuit breaker equipment.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"38 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":"86395879","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