Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509007
Huicun Zhao, Yu Gao, Wenqu Wang, X. Yuan, Huan Wang
Surface charge accumulation on alumina/epoxy insulator affects the safe and reliable operation of the highvoltage direct-current (HVDC) gas insulated transmission line (GIL) and gas insulated switchgear (GIS). In this paper, a flexible coating strategy was proposed to suppress the charge accumulation on the insulator, so as to optimize the electric field distribution. The insulator with multi-arc surface profile and a coaxial electrode system were designed, then surface coatings with various conductivities were deposited on the designated areas of the epoxy insulator by brushing method. The effects of flexible coating on the charge accumulation behavior of the insulator under −15, −20 and −25 kV DC voltages were studied by a kelvin type probe. The results showed that when the metallic wire was adhered on high voltage electrode, the positive charges were accumulated on the nonplanar region in the form of speckles, and the flexible coating could significantly inhibit the charge accumulation on the insulator.
{"title":"Regulation of Surface Charge Accumulation on Epoxy Insulator by Flexible Coating under DC Voltage","authors":"Huicun Zhao, Yu Gao, Wenqu Wang, X. Yuan, Huan Wang","doi":"10.1109/ICEMPE51623.2021.9509007","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509007","url":null,"abstract":"Surface charge accumulation on alumina/epoxy insulator affects the safe and reliable operation of the highvoltage direct-current (HVDC) gas insulated transmission line (GIL) and gas insulated switchgear (GIS). In this paper, a flexible coating strategy was proposed to suppress the charge accumulation on the insulator, so as to optimize the electric field distribution. The insulator with multi-arc surface profile and a coaxial electrode system were designed, then surface coatings with various conductivities were deposited on the designated areas of the epoxy insulator by brushing method. The effects of flexible coating on the charge accumulation behavior of the insulator under −15, −20 and −25 kV DC voltages were studied by a kelvin type probe. The results showed that when the metallic wire was adhered on high voltage electrode, the positive charges were accumulated on the nonplanar region in the form of speckles, and the flexible coating could significantly inhibit the charge accumulation on the insulator.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89952685","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509054
Geqi Li, Ke Wang, Shuqi Zhang, F. Yang, Peng Li, Jinzhong Li, Gang Li, Xueli Liu
As an important component of transformers and converter transformers, vacuum on-load tap-changers directly affect the reliability of power grid operation. In order to improve the reliability of the tap-changer, it is necessary to study the transition circuit of the tap-changer and its operation method in order to improve it. This paper analyzes two kinds of transition circuits of vacuum on-load tap-changers and their operation methods, and analyzes the breaking tasks of each contact in the transition circuit. It is found that the two topologies have an imbalance in the breaking capacity of the two internal vacuum tubes. This paper proposes a type of vacuum on-load tap-changer topology, which adds a vacuum tube and a transition resistance. At the same time, an operation method is proposed, which changes the vacuum tube with heavy switching task into two vacuum tubes that operate alternately in the adjacent switching, and changes one transition resistance into two transition resistances that work alternately. It reduces the burden of a single auxiliary vacuum tube, balances the contact ablation of each vacuum tube under long-term operation, and reduces the temperature rise of the transition resistance, which improves reliability of the tap-changer.
{"title":"Research on A Transition Circuit of Vacuum On-Load Tap-Changer","authors":"Geqi Li, Ke Wang, Shuqi Zhang, F. Yang, Peng Li, Jinzhong Li, Gang Li, Xueli Liu","doi":"10.1109/ICEMPE51623.2021.9509054","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509054","url":null,"abstract":"As an important component of transformers and converter transformers, vacuum on-load tap-changers directly affect the reliability of power grid operation. In order to improve the reliability of the tap-changer, it is necessary to study the transition circuit of the tap-changer and its operation method in order to improve it. This paper analyzes two kinds of transition circuits of vacuum on-load tap-changers and their operation methods, and analyzes the breaking tasks of each contact in the transition circuit. It is found that the two topologies have an imbalance in the breaking capacity of the two internal vacuum tubes. This paper proposes a type of vacuum on-load tap-changer topology, which adds a vacuum tube and a transition resistance. At the same time, an operation method is proposed, which changes the vacuum tube with heavy switching task into two vacuum tubes that operate alternately in the adjacent switching, and changes one transition resistance into two transition resistances that work alternately. It reduces the burden of a single auxiliary vacuum tube, balances the contact ablation of each vacuum tube under long-term operation, and reduces the temperature rise of the transition resistance, which improves reliability of the tap-changer.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"42 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86590432","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509173
K. Yin, F. D. da Silva, C. Bak, Hanchi Zhang, Qian Wang, H. Skouboe
A new proposed Y-shaped composite pylon has a potential to become the next new generation $2times 400text{kV}$ overhead line transmission tower. However, according to previous work, the electric field magnitudes inside the hollow cross-arm tube exceeds the onset electric field strength of corona, which does not meet the requirements of insulation. In this paper, an electrostatic field model is established by using finite element method analysis. Aiming to previous existing issues, we propose using low density polyethylene (LDPE) as filling material to fill the cross-arm. Meanwhile, the clamps structure is redesigned. Then, the electric field distribution results along the surface of the cross-arm and around the clamps are presented. Furthermore, through the shape optimization, the electric field distribution of clamps and sheds meets the design criteria. Finally, taking advantages of the insulation margin, the conductor enclosure is removed and the height of the clamp is decreased. The final clamp structure meets the insulation requirement.
{"title":"Electric Field Computation and Optimization for A 400 kV Y-shaped Composite Cross-arm","authors":"K. Yin, F. D. da Silva, C. Bak, Hanchi Zhang, Qian Wang, H. Skouboe","doi":"10.1109/ICEMPE51623.2021.9509173","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509173","url":null,"abstract":"A new proposed Y-shaped composite pylon has a potential to become the next new generation $2times 400text{kV}$ overhead line transmission tower. However, according to previous work, the electric field magnitudes inside the hollow cross-arm tube exceeds the onset electric field strength of corona, which does not meet the requirements of insulation. In this paper, an electrostatic field model is established by using finite element method analysis. Aiming to previous existing issues, we propose using low density polyethylene (LDPE) as filling material to fill the cross-arm. Meanwhile, the clamps structure is redesigned. Then, the electric field distribution results along the surface of the cross-arm and around the clamps are presented. Furthermore, through the shape optimization, the electric field distribution of clamps and sheds meets the design criteria. Finally, taking advantages of the insulation margin, the conductor enclosure is removed and the height of the clamp is decreased. The final clamp structure meets the insulation requirement.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"2 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79530109","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509118
Hongsheng Zhan, Chuanhui Cheng, R. Zhuo, M. Fu, Zhiming Huang, Yan Luo
Up to date, an increasing interest arises on the dielectric response measurement in time and frequency domain to assess the condition of the oil and paper insulations of electrical equipment. The polarization and depolarization current (PDC) is widely accepted as a simple but effective technique dielectric response in time domain, which is based on the linear dielectric system. In the presented paper, the PDC technique is applied to study the non-linearity of dielectric response in time domain of oil-paper insulations. Two sample configurations, i.e., a layer of oil immersed paper sample and two layers of an oil gap and oil immersed paper layer, are used to study the effect of structure on the non-linearity. The nonlinearity of dielectric response is evaluated under various voltages and various sample configurations. It is found that a non-linearity of dielectric response in time domain of multilayer of oil and paper occurs in extremely low field region, much lower than that of a single layer of oil immersed paper. Charge carrier's motions in the oil gap and interface polarization shall play a critical in the non-linearity.
{"title":"A Study on the Non-linearity of Dielectric Response in Time Domain of Oil-paper Insulation","authors":"Hongsheng Zhan, Chuanhui Cheng, R. Zhuo, M. Fu, Zhiming Huang, Yan Luo","doi":"10.1109/ICEMPE51623.2021.9509118","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509118","url":null,"abstract":"Up to date, an increasing interest arises on the dielectric response measurement in time and frequency domain to assess the condition of the oil and paper insulations of electrical equipment. The polarization and depolarization current (PDC) is widely accepted as a simple but effective technique dielectric response in time domain, which is based on the linear dielectric system. In the presented paper, the PDC technique is applied to study the non-linearity of dielectric response in time domain of oil-paper insulations. Two sample configurations, i.e., a layer of oil immersed paper sample and two layers of an oil gap and oil immersed paper layer, are used to study the effect of structure on the non-linearity. The nonlinearity of dielectric response is evaluated under various voltages and various sample configurations. It is found that a non-linearity of dielectric response in time domain of multilayer of oil and paper occurs in extremely low field region, much lower than that of a single layer of oil immersed paper. Charge carrier's motions in the oil gap and interface polarization shall play a critical in the non-linearity.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"64 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88395330","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509233
Sen Qian, Xiaojing Zhang, Chuan Chen, Hongkang Wang, Jinghong Guo, Yang Xu
Electric vehicles are expected to offer many benefits over conventional vehicles, such as reduction of carbon emission and fuel costs. However, the adoption of electric vehicles would bring great challenges to the distribution transformer, as their charging behavior would make the transformer operate under the varying load and therefore submit to overload risk. Hence, the insulation aging which shortens the transformer lifetime would be accelerated. In this research, we study the impacts of electric vehicle charging on the aging of the distribution transformer with conventional and high-temperature insulations. The number of households, base load and charging habits of a district in Jiaxing city are collected, and then a Monte Carlo simulation model is proposed to evaluate the additional load demand due to the electric vehicle charging. Furthermore, the simulated load demand is input to a model, which is modified based on the algorithm stipulated in IEEE C57.91, to calculate the thermal rise and the aging of the distribution transformer. The results imply that the electric vehicle charging would exacerbate the swing of the load demand. Particularly, the lifetime of the conventional distribution transformer would be significantly reduced. In comparison, the high-temperature insulation could mitigate the negative impacts of the electric vehicle charging on the transformer ageing.
{"title":"Ageing Evaluation of the Distribution Transformer under Varying Load due to Electric Vehicle Charging","authors":"Sen Qian, Xiaojing Zhang, Chuan Chen, Hongkang Wang, Jinghong Guo, Yang Xu","doi":"10.1109/ICEMPE51623.2021.9509233","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509233","url":null,"abstract":"Electric vehicles are expected to offer many benefits over conventional vehicles, such as reduction of carbon emission and fuel costs. However, the adoption of electric vehicles would bring great challenges to the distribution transformer, as their charging behavior would make the transformer operate under the varying load and therefore submit to overload risk. Hence, the insulation aging which shortens the transformer lifetime would be accelerated. In this research, we study the impacts of electric vehicle charging on the aging of the distribution transformer with conventional and high-temperature insulations. The number of households, base load and charging habits of a district in Jiaxing city are collected, and then a Monte Carlo simulation model is proposed to evaluate the additional load demand due to the electric vehicle charging. Furthermore, the simulated load demand is input to a model, which is modified based on the algorithm stipulated in IEEE C57.91, to calculate the thermal rise and the aging of the distribution transformer. The results imply that the electric vehicle charging would exacerbate the swing of the load demand. Particularly, the lifetime of the conventional distribution transformer would be significantly reduced. In comparison, the high-temperature insulation could mitigate the negative impacts of the electric vehicle charging on the transformer ageing.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"8 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88788273","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509196
W. Ding, Yanliang He, A. Sun, Guanjun Zhang
This paper presents and compares the results of two simulation methods for negative corona current pulses in SF6 at 0.3 Mpa. A needle-plane electrode configuration is constructed in a 2D axisymmetric model using COMSOL Multiphysics®. The first model is constructed based on fluid dynamics and plasma chemical reactions. The second is a simplified fluid model which reduces the whole particles and reactions into three continuity equations of electrons, positive ions and negative ions. The results show that in the first simulation, the current pulse bears a close resemblance to that in experiment, with a magnitude of 1.31 mA and a pulse-width of 48.7 ns. The second simulation can also successfully simulate the current waveform, but there exists obvious deviation from experimental current pulses in numerical values. Based on the spatiotemporal distribution of mean electron energy and charged particles, the mechanism of pulse formation is analyzed.
{"title":"Two methods of simulating corona current pulses in SF6 under negative DC voltage","authors":"W. Ding, Yanliang He, A. Sun, Guanjun Zhang","doi":"10.1109/ICEMPE51623.2021.9509196","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509196","url":null,"abstract":"This paper presents and compares the results of two simulation methods for negative corona current pulses in SF6 at 0.3 Mpa. A needle-plane electrode configuration is constructed in a 2D axisymmetric model using COMSOL Multiphysics®. The first model is constructed based on fluid dynamics and plasma chemical reactions. The second is a simplified fluid model which reduces the whole particles and reactions into three continuity equations of electrons, positive ions and negative ions. The results show that in the first simulation, the current pulse bears a close resemblance to that in experiment, with a magnitude of 1.31 mA and a pulse-width of 48.7 ns. The second simulation can also successfully simulate the current waveform, but there exists obvious deviation from experimental current pulses in numerical values. Based on the spatiotemporal distribution of mean electron energy and charged particles, the mechanism of pulse formation is analyzed.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"132 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89122394","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}
Epoxy resin is widely used as insulating materials in the electric power equipment; however, these properties are affected by the dielectric relaxation greatly. In this paper, three kinds of E51 bisphenol A epoxy resin with different epoxides were used to make samples for differential scanning calorimetry experiment, fourier transform infrared spectroscopy test and broadband dielectric spectroscopy experiment to research the effect of epoxide on molecular chain relaxation. The results demonstrate the relaxation of molecular chain determines the complex permittivity at high frequency when the temperature is over glass transition temperature ($T_{g}$). Through fitting the complex permittivity, it is found the molecular chain relaxation of epoxy is dipole relaxation polarization. Epoxy resin with higher epoxide has stronger polarization intensity.
{"title":"The Effect of Epoxide on Molecular Chain Relaxation on Bisphenol A Epoxy Resin after Curing","authors":"Mingru Li, Zhuoli Cai, Huan Niu, Shengtao Li, Yafang Gao, Bingnan Li, Hangyin Mao, Weiwang Wang, K. Shang","doi":"10.1109/ICEMPE51623.2021.9509079","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509079","url":null,"abstract":"Epoxy resin is widely used as insulating materials in the electric power equipment; however, these properties are affected by the dielectric relaxation greatly. In this paper, three kinds of E51 bisphenol A epoxy resin with different epoxides were used to make samples for differential scanning calorimetry experiment, fourier transform infrared spectroscopy test and broadband dielectric spectroscopy experiment to research the effect of epoxide on molecular chain relaxation. The results demonstrate the relaxation of molecular chain determines the complex permittivity at high frequency when the temperature is over glass transition temperature ($T_{g}$). Through fitting the complex permittivity, it is found the molecular chain relaxation of epoxy is dipole relaxation polarization. Epoxy resin with higher epoxide has stronger polarization intensity.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89416394","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509228
Xiping Jiang, Yingkai Long, Yongfu Li
Mechanical fault is one of the main faults of GIS equipment. The traditional detection methods based on artificial hearing and touch, rely heavily on personal experience, with low reliability. The fault can only be discovered when the vibration intensity is high, which brings great security risks to the power grid. Based on the analysis of the vibration mechanism of GIS equipment, an portable defect detection device of abnormal vibration of GIS equipment is developed, which can detect potential mechanical defects of GIS equipment in time, and effectively guide maintenance work to ensure the safety and stability of GIS equipment. The acceleration sensor is used to obtain the vibration signal of the GIS shell, and the characteristics of the vibration signal waveform are extracted through the FFT algorithm and the VMD algorithm. The field test results show that this device can accurately locate the abnormal vibration of GIS equipment and distinguish the defect types.
{"title":"Research on the Defect Detection Technology of Abnormal Vibration of GIS Equipment Based on Acoustic Emission Analysis Technology","authors":"Xiping Jiang, Yingkai Long, Yongfu Li","doi":"10.1109/ICEMPE51623.2021.9509228","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509228","url":null,"abstract":"Mechanical fault is one of the main faults of GIS equipment. The traditional detection methods based on artificial hearing and touch, rely heavily on personal experience, with low reliability. The fault can only be discovered when the vibration intensity is high, which brings great security risks to the power grid. Based on the analysis of the vibration mechanism of GIS equipment, an portable defect detection device of abnormal vibration of GIS equipment is developed, which can detect potential mechanical defects of GIS equipment in time, and effectively guide maintenance work to ensure the safety and stability of GIS equipment. The acceleration sensor is used to obtain the vibration signal of the GIS shell, and the characteristics of the vibration signal waveform are extracted through the FFT algorithm and the VMD algorithm. The field test results show that this device can accurately locate the abnormal vibration of GIS equipment and distinguish the defect types.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"22 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86363906","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}
Pub Date : 2021-04-11DOI: 10.1109/ICEMPE51623.2021.9509237
L. Yao, L. Ni, Huanlei Yu, Qi Ding, Jianmin Zhang, Jiangming Zhang, An Wen
In view of the large amount of data in the low-voltage distribution network (LVDN) and the low efficiency of line loss analysis, this paper constructs an integrated decision-making platform for line loss online calculation and management based on situation awareness visualization technology. In this research, how to make full use of the existing system data to carry out the research on the intelligent diagnosis model of the line loss abnormality in the distribution network, and use the visualization method to realize the abnormality monitoring and automatically generate the loss reduction strategy is the goal of this article. First, through the user's electricity consumption data obtained from the electricity collection system; secondly, combine the user files of the marketing business application system, the geographic information of the GIS system and other data, and use big data analysis technology to realize the analysis and application of multi-source system data integration; Finally, develop main functions such as automatic identification of LVDN topology, online calculation and monitoring of line loss, situation awareness visualization of line loss in LVDN, intelligent diagnosis of line loss abnormalities and recommendation of loss reduction strategies. Applying human-computer interaction of situation awareness and visualization and abnormal diagnosis intelligence, intuitively and accurately display the line loss management problems in the distribution network. Through the test of specific examples, the effectiveness of the decision-making platform is verified.
{"title":"Integrated decision-making for line loss online calculation and management based on situation awareness visualization","authors":"L. Yao, L. Ni, Huanlei Yu, Qi Ding, Jianmin Zhang, Jiangming Zhang, An Wen","doi":"10.1109/ICEMPE51623.2021.9509237","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509237","url":null,"abstract":"In view of the large amount of data in the low-voltage distribution network (LVDN) and the low efficiency of line loss analysis, this paper constructs an integrated decision-making platform for line loss online calculation and management based on situation awareness visualization technology. In this research, how to make full use of the existing system data to carry out the research on the intelligent diagnosis model of the line loss abnormality in the distribution network, and use the visualization method to realize the abnormality monitoring and automatically generate the loss reduction strategy is the goal of this article. First, through the user's electricity consumption data obtained from the electricity collection system; secondly, combine the user files of the marketing business application system, the geographic information of the GIS system and other data, and use big data analysis technology to realize the analysis and application of multi-source system data integration; Finally, develop main functions such as automatic identification of LVDN topology, online calculation and monitoring of line loss, situation awareness visualization of line loss in LVDN, intelligent diagnosis of line loss abnormalities and recommendation of loss reduction strategies. Applying human-computer interaction of situation awareness and visualization and abnormal diagnosis intelligence, intuitively and accurately display the line loss management problems in the distribution network. Through the test of specific examples, the effectiveness of the decision-making platform is verified.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85555563","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}
At present, the application of functionally graded materials (FGM) in the field of solid insulation objects has become a hot issue. Applying dielectric functionally graded material (d-FGM) into insulation objects can effectively improve the insulation performance without complicating the physical structure of insulation objects. In the application of d-FGM insulators, how to select the optimal spatially distribution of dielectric parameters (conductivity or permittivity) is one of the key issues. In this paper, two typical types of algorithms (iterative algorithm and topology algorithm) are used to optimize the dielectric parameter distribution of the truncated cone insulator model. It can be seen from the optimization results that the two optimization algorithms have effectively reduced the electric field strength at triple junctions and improved the insulation performance of the insulator. Finally, the optimization effects of the two algorithms are compared, and it is found that topology optimization algorithm has better effect, with higher flexibility and advancement.
{"title":"Comparison of Optimization Methods used in the Design of Functionally Graded Insulation Objects","authors":"Haoyang Yin, Wen-Dong Li, Chao Wang, Zhi-hui Jiang, Wang Guo, Guanjun Zhang","doi":"10.1109/ICEMPE51623.2021.9509090","DOIUrl":"https://doi.org/10.1109/ICEMPE51623.2021.9509090","url":null,"abstract":"At present, the application of functionally graded materials (FGM) in the field of solid insulation objects has become a hot issue. Applying dielectric functionally graded material (d-FGM) into insulation objects can effectively improve the insulation performance without complicating the physical structure of insulation objects. In the application of d-FGM insulators, how to select the optimal spatially distribution of dielectric parameters (conductivity or permittivity) is one of the key issues. In this paper, two typical types of algorithms (iterative algorithm and topology algorithm) are used to optimize the dielectric parameter distribution of the truncated cone insulator model. It can be seen from the optimization results that the two optimization algorithms have effectively reduced the electric field strength at triple junctions and improved the insulation performance of the insulator. Finally, the optimization effects of the two algorithms are compared, and it is found that topology optimization algorithm has better effect, with higher flexibility and advancement.","PeriodicalId":7083,"journal":{"name":"2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2021-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83164813","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}
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