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

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Simulation of GIS Epoxy Insulator Surface Discharge Channel Based on Fractal Theory 基于分形理论的GIS环氧绝缘子表面放电通道仿真
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708378
K. Gao, Tengfei Li, Min Lin, Gangjie Zhou, Yong Ma, Lijun Jin
{"title":"Simulation of GIS Epoxy Insulator Surface Discharge Channel Based on Fractal Theory","authors":"K. Gao, Tengfei Li, Min Lin, Gangjie Zhou, Yong Ma, Lijun Jin","doi":"10.1109/AEERO52475.2021.9708378","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708378","url":null,"abstract":"Metal particles in gas insulated switchgear (GIS) can cause partial discharge or even flashover on the surface of basin insulator. Based on the fractal theory and streamer breakdown theory, a simulation model of discharge channel on the surface of epoxy insulator is established. By assuming that the defect is metal particles, the discharge channels with different defect locations and different defect degrees are simulated. The fractal dimension of discharge channel is calculated by box width counting method, and its characteristics are analyzed. The results show that the extending velocity of the discharge channel increases exponentially with the development of discharge. With the metal particles close to the high voltage electrode, the critical voltage of flashover decreases, and the fractal dimension of discharge channel increases. The research results can provide theoretical support for exploring the flashover characteristics of metal particles on GIS insulators.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"101 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":"82255648","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 ultrasonic array positioning of Partial Discharge in GIS based on Incoherent Signal Subspace Method 基于非相干信号子空间法的GIS局部放电超声阵列定位研究
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708338
Long Li, Hua Yin, Wenbin Zhao, Zhimin Wu
{"title":"Research on ultrasonic array positioning of Partial Discharge in GIS based on Incoherent Signal Subspace Method","authors":"Long Li, Hua Yin, Wenbin Zhao, Zhimin Wu","doi":"10.1109/AEERO52475.2021.9708338","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708338","url":null,"abstract":"Partial discharge is the main reason of insulation aging of GIS equipment. It is very important to find and locate the location of partial discharge for safe operation of GIS equipment. In this paper, we use an array of $2 times 3$ approximate planes, and the detected data is denoised by sparse decomposition theory. According to the waveform comparison before and after denoising, the output signal-to-noise ratio of each array element is significantly improved compared with the input signal-to-noise ratio. Then the Incoherent Signal Subspace Method (ISM) algorithm is used for simulation, the analysis results show that the original data is de-noising, and then the Incoherent Signal Subspace Method (ISM) is used for simulation, which shows that the direction finding spectrum peak is concentrated and sharp after de-noising, and the direction finding effect has been improved to a certain extent.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"60 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":"84928776","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
A Novel Method for Extracting Features of Partial Discharge Pulse Current Signal 局部放电脉冲电流信号特征提取的新方法
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708217
Yinan Wu, H. Mu, Yiming Zheng, J. Zhan, Xianjun Shao, Chen Li, Chi Zhang, Guanjun Zhang
{"title":"A Novel Method for Extracting Features of Partial Discharge Pulse Current Signal","authors":"Yinan Wu, H. Mu, Yiming Zheng, J. Zhan, Xianjun Shao, Chen Li, Chi Zhang, Guanjun Zhang","doi":"10.1109/AEERO52475.2021.9708217","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708217","url":null,"abstract":"Partial discharge (PD) not only causes the aging of the internal insulation of the power transformer but also characterizes the deterioration of the insulation system. During the operation of the power transformer, different types of partial discharges (PDs) may occur inside. The opportune PD pattern recognition is of great significance to the maintenance and operation stability of the transformer. The pulse current method is a widely used PD detection method, and the feature extraction of pulse current signal is a key step in PD pattern recognition. The present feature extraction method of pulse current signal usually uses a complex algorithm and takes a long computing time, which is not suitable for field application. This paper proposed a fast and effective method for extracting features of PD pulse current signals. The features extracted by this method can correctly classify the three typical insulation defects in transformers.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"37 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":"82737858","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
Influence of particle size on Lichtenberg Figure technique for surface charge characterization 颗粒尺寸对表面电荷表征的李希滕贝格图技术的影响
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708157
Zhijie Shi, W. Wang, K. Han, Yuanyuan Li, Jiancheng Song, Z. Lei
{"title":"Influence of particle size on Lichtenberg Figure technique for surface charge characterization","authors":"Zhijie Shi, W. Wang, K. Han, Yuanyuan Li, Jiancheng Song, Z. Lei","doi":"10.1109/AEERO52475.2021.9708157","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708157","url":null,"abstract":"The Lichtenberg Figure technique is a method that can directly observe the surface charge distribution of the insulating material. It is widely used in the observation of the charge at the gas-solid interface and the study of the discharge mechanism. A needle-plate electrode was used to corona charge the polyimide film. The influence of the particle size on the spatial resolution of the surface charge measurement presented by the Lichtenberg Figure was studied by selecting dust of different particle sizes. A surface potential measurement system was constructed for verifying whether the dust affects the original charge distribution on the insulating surface. The results show that as the particle size of the dust becomes smaller, the accuracy of the Lichtenberg Figure is improved, and the influence of the dust on the original charge distribution can be reduced through the improvement of the test method.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"34 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":"84309565","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
Heat and Moisture Coupling for HVAC Tunnel Cable 暖通空调隧道电缆的热湿耦合
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708248
Ziqi Lin, Hua Bao, Qiuqin Sun, Tangsheng Yang, Rui Wu, Jie Chen
{"title":"Heat and Moisture Coupling for HVAC Tunnel Cable","authors":"Ziqi Lin, Hua Bao, Qiuqin Sun, Tangsheng Yang, Rui Wu, Jie Chen","doi":"10.1109/AEERO52475.2021.9708248","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708248","url":null,"abstract":"The ampacity of tunnel cable is heavily dependent on the capacity to diffuse heat into surrounding air. This ability is significantly influenced by wet conditions. Based on the finite element method (FEM), a 3D model of high voltage alternating current (HVAC) tunnel cable is developed, coupling heat and moisture transfer. The thermal properties of air are changing with relative humidity and temperature. Latent heat of evaporation is included. Thermal analysis is conducted by recording the cable maximum temperature as a function of time and relative humidity. Temperature gradient exists not only radially, but also circumferentially and longitudinally.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"32 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":"81913733","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
Distributed Cooperative Secondary Control With Vitual Impedance for Islanded Microgrid 孤岛微电网虚阻抗分布式协同二次控制
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708117
Xiaotang Jin, Hui Wang, Wenzheng Zhou, Meng Zhang
{"title":"Distributed Cooperative Secondary Control With Vitual Impedance for Islanded Microgrid","authors":"Xiaotang Jin, Hui Wang, Wenzheng Zhou, Meng Zhang","doi":"10.1109/AEERO52475.2021.9708117","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708117","url":null,"abstract":"This paper presents a two-level layer control for microgrid (MG)in islanded mode. In the first level, a virtual impedance is designed based on the transfer function of the parallel inverter to correct the equivalent impedance of the inverter, with which active and reactive power can be decouped. The second level take part in power distribution and point of common coupling (PCC) voltage regulation. A PCC voltage regulation method is proposed to provides a proportionality coefficient to the reference voltage. The global positioning system (GPS) is utilized to provide the secondary compensation at the same time. The rationality of the proposed control strategy was tested by MATLAB/Simulink.","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":"79226759","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 the extraction method of high-voltage circuit breaker vibration signal based on IVMD 基于IVMD的高压断路器振动信号提取方法研究
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708267
Lei Mu, Zhe Sun, Yi Zhao, Ning Wei, Yang Wang, Chenlei Liu
{"title":"Research on the extraction method of high-voltage circuit breaker vibration signal based on IVMD","authors":"Lei Mu, Zhe Sun, Yi Zhao, Ning Wei, Yang Wang, Chenlei Liu","doi":"10.1109/AEERO52475.2021.9708267","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708267","url":null,"abstract":"The vibration of the high-voltage circuit breaker operating mechanism can indirectly reflect its mechanical motion state. In order to effectively extract the vibration signal characteristic quantity, the vibration signal of the circuit breaker is firstly analyzed theoretically as a series of simple harmonic superposition formation. For the characteristics of randomness and non-smoothness of the vibration signal, VMD (Variational Mode Decomposition) is recommended for calculation and analysis. The concept of quality factor is introduced to optimize the VMD. Finally, via the comparison of example simulation, IVMD can separate each component mode of the vibration signal effectively, which can solve the decomposition modal overlap problem of EMD.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"10 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":"79479523","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
Comparative Research on Discharge Gas Characteristics of Typical Defects in Pure Oil Gap 纯油间隙典型缺陷放电气体特性比较研究
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708337
Qin Liu, Tai-Hung Liu, Xiongjie Xie, Xiaoqing Luo, Wei Hu, Qiming Ye
{"title":"Comparative Research on Discharge Gas Characteristics of Typical Defects in Pure Oil Gap","authors":"Qin Liu, Tai-Hung Liu, Xiongjie Xie, Xiaoqing Luo, Wei Hu, Qiming Ye","doi":"10.1109/AEERO52475.2021.9708337","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708337","url":null,"abstract":"The oil-less equipment is internally insulated by filling with insulating oil. When a discharge or overheating failure occurs, there is a phenomenon that a large amount of H2, hydrocarbon gas, CO and CO2 and other dissolved gases can be produced because of the small internal space. These can cause a explode in severe cases, resulting a huge economical loss. Therefore, a discharge test system for oil-less equipment is designed in the paper. Firstly, the gas diffusion characteristics in the oil after discharge is obtained. Secondly, the gas production test is studied under three typical electrodes, including the plate-plate electrode, ball-ball electrode and needle-plate electrode. Finally, the data of the test is obtained ats at different gap distances and charge time. The research results show that under plate-to-plate electrode discharge, the gas produced by direct pressurization to breakdown is small. The gas production increases with the increase of the gap distance during continuous discharge. The H2 content under 6mm pitch is 9.2 times, 5.9 times and 7.6 times larger than 3mm under discharge of 5s, 10s and 15s, respectively. The C2 H2 content and H2 content of the ball electrode under 6mm pitch gradually increase with the increase of discharge time. After the gas concentration increases, the C2 H2 and H2 generated by the discharge of the ball electrode and the needle plate electrode show a saturation trend. The three electrode discharges all show the law that the gas production increases with the increase of the discharge interval and discharge time. At the same discharge time, the needle plate electrode has the largest gas production volume, followed by the ball electrode, and the plate electrode has the smallest gas production volume. The change law of the discharge gas content in three typical electrode oils is obtained in the paper. There is a great significance for the failure analysis of oil-less equipment under gas production.","PeriodicalId":6828,"journal":{"name":"2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO)","volume":"19 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":"77806002","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
Influence of the Defects in RIP bushings on Electric Field Distortion RIP套管缺陷对电场畸变的影响
2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO) Pub Date : 2021-10-15 DOI: 10.1109/AEERO52475.2021.9708178
Y. Qiao, T. Hu, T. Luo, C. Zhu, F. Zhou, D. Wang, R. Zhuo, Z. Huang, Y. Jing
{"title":"Influence of the Defects in RIP bushings on Electric Field Distortion","authors":"Y. Qiao, T. Hu, T. Luo, C. Zhu, F. Zhou, D. Wang, R. Zhuo, Z. Huang, Y. Jing","doi":"10.1109/AEERO52475.2021.9708178","DOIUrl":"https://doi.org/10.1109/AEERO52475.2021.9708178","url":null,"abstract":"Epoxy resin impregnated paper (RIP) dry bushings are an important part of transformers. The defects in the core insulation will seriously threaten the safe operation of the substation. This paper studies the influence of different types of defects on the electric field distortion of the RIP bushings. Constructed a model of dry casing, and set up bubble, crack and water drop defects in the model to study the influence of defect development on electric field distortion. It is indicated that the bubble defects, crack defects, and damp defects have an important impact on the electric field. Among them, the larger ones have a more serious effect on the electric field distortion. In addition, if the defect is inside the epoxy insulation, and located relatively close to the current conduit, the degree of electric field distortion is much greater than in other locations.","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":"85430521","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
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