Pub Date : 2018-11-01DOI: 10.1109/CIEEC.2018.8745985
Q. Zhou, M. Lei, Binjun Yan, Xin Liu, Jin Liu, Yanbo Chen
With the rapid development of society, modern power system is becoming larger and larger, and the operation mode is more and more complex as well. Occasional incidents may cause line outage, which sometimes leads to overload problems, and then endanger the stable operation of the system. Therefore, the safety assessment is of great significance to the safe operation of system, and prevention control should be taken to reduce the risk of system. In this premise, this paper proposes a risk-based rapid prevention control method of power system. With consideration of the line outage probability due to aging and the risk index of line outage, the risk assessment is introduced into the power system in the method. The risk assessment fills the insufficient of traditional safety assessment. On this basis, the DC power flow and the line outage distribution factor (LODF) are combined to establish a rapid prevention control model. The model reduces the number of optimization variables and constraints, and improves the computational efficiency. Finally, the effectiveness of the proposed method is verified with simulation example.
{"title":"A Rapid Risk-Based Prevention Control Method of Power System","authors":"Q. Zhou, M. Lei, Binjun Yan, Xin Liu, Jin Liu, Yanbo Chen","doi":"10.1109/CIEEC.2018.8745985","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745985","url":null,"abstract":"With the rapid development of society, modern power system is becoming larger and larger, and the operation mode is more and more complex as well. Occasional incidents may cause line outage, which sometimes leads to overload problems, and then endanger the stable operation of the system. Therefore, the safety assessment is of great significance to the safe operation of system, and prevention control should be taken to reduce the risk of system. In this premise, this paper proposes a risk-based rapid prevention control method of power system. With consideration of the line outage probability due to aging and the risk index of line outage, the risk assessment is introduced into the power system in the method. The risk assessment fills the insufficient of traditional safety assessment. On this basis, the DC power flow and the line outage distribution factor (LODF) are combined to establish a rapid prevention control model. The model reduces the number of optimization variables and constraints, and improves the computational efficiency. Finally, the effectiveness of the proposed method is verified with simulation example.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124284952","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745820
X. Bian, Rui Tuo, Zhuo Zhang, Shaoxiong Zhai, Wei Yang, Z. Xing, S. He, Jun Lin
As the voltage level increases, the high-voltage equipment will generate more heat under special working conditions, so there is a new requirement for the thermal conductivity of the insulating material. The addition of a highly thermally conductive filler to an insulating resin matrix is a simple and effective method. Hexagonal boron nitride (h-BN) is a good filler for improving the thermal conductivity of the resin due to its high thermal conductivity and thermal stability. However, the boron nitride surface is smooth, has fewer functional groups, and has poor compatibility with the substrate. In this paper, the self-polymerization of dopamine is chemically coated on the surface of BN with a layer of polydopamine (PDA), the PDA layer is used as a secondary reaction platform. and modified with γ-aminopropyltriethoxysilane (KH550). Three different composite materials were prepared by mixing the treated particles with an epoxy resin. The effect of surface treatment on the dispersibility and thermal conductivity of the filler was investigated.
{"title":"Thermal Conductivity of Epoxy Composites Filled with Polydopamine and Goupling Agent Functionalized Boron Nitride","authors":"X. Bian, Rui Tuo, Zhuo Zhang, Shaoxiong Zhai, Wei Yang, Z. Xing, S. He, Jun Lin","doi":"10.1109/CIEEC.2018.8745820","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745820","url":null,"abstract":"As the voltage level increases, the high-voltage equipment will generate more heat under special working conditions, so there is a new requirement for the thermal conductivity of the insulating material. The addition of a highly thermally conductive filler to an insulating resin matrix is a simple and effective method. Hexagonal boron nitride (h-BN) is a good filler for improving the thermal conductivity of the resin due to its high thermal conductivity and thermal stability. However, the boron nitride surface is smooth, has fewer functional groups, and has poor compatibility with the substrate. In this paper, the self-polymerization of dopamine is chemically coated on the surface of BN with a layer of polydopamine (PDA), the PDA layer is used as a secondary reaction platform. and modified with γ-aminopropyltriethoxysilane (KH550). Three different composite materials were prepared by mixing the treated particles with an epoxy resin. The effect of surface treatment on the dispersibility and thermal conductivity of the filler was investigated.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116967022","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745861
C. Ruan, X. Wang, Xi Wang, Fangyu Gao, Yepeng Li
Continuation power flow (CPF) is the most commonly used voltage stability static analysis method, and it consists of four steps: prediction, step-size control, parameterization and correction, among which parameterization is a key factor to ensure the success of continuous power flow calculation. At first, a performance analysis of common parameterization methods is studied, the criterion for judging the merits of the parameterization method is the distance between the predicted point and the exact solution of the CPF. The closer, the faster the correction can be converged. Various parameterization methods varies in merits and demerits in the different regions of the CPF solution curve. Therefore, in order to fully exploit, use and complement the information of each parameterization method, a coordinated combination of parameterization method is proposed. Varies of the parameterization methods are adopted in different regions of PV curve, while also setting parametric switching breakpoints during the process of tracing PV curve, and using the divergence of correction as the combination switching criterion. Finally, applying fixed-step method and classic variable-step method, continuation power flow calculations are carried out respectively with different parameters. Computational analysis of the IEEE 39-bus shows that the proposed coordinated combination parameterization method has significant effectiveness and superiority.
{"title":"Improved Continuation Power Flow Calculation Method Based on Coordinated Combination of Parameterization","authors":"C. Ruan, X. Wang, Xi Wang, Fangyu Gao, Yepeng Li","doi":"10.1109/CIEEC.2018.8745861","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745861","url":null,"abstract":"Continuation power flow (CPF) is the most commonly used voltage stability static analysis method, and it consists of four steps: prediction, step-size control, parameterization and correction, among which parameterization is a key factor to ensure the success of continuous power flow calculation. At first, a performance analysis of common parameterization methods is studied, the criterion for judging the merits of the parameterization method is the distance between the predicted point and the exact solution of the CPF. The closer, the faster the correction can be converged. Various parameterization methods varies in merits and demerits in the different regions of the CPF solution curve. Therefore, in order to fully exploit, use and complement the information of each parameterization method, a coordinated combination of parameterization method is proposed. Varies of the parameterization methods are adopted in different regions of PV curve, while also setting parametric switching breakpoints during the process of tracing PV curve, and using the divergence of correction as the combination switching criterion. Finally, applying fixed-step method and classic variable-step method, continuation power flow calculations are carried out respectively with different parameters. Computational analysis of the IEEE 39-bus shows that the proposed coordinated combination parameterization method has significant effectiveness and superiority.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"556 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120883560","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745739
Bilawal Rehman, Chongru Liu
This research work proposes a current order sharing technique for LCC MTDC power system. LCC MTDC architecture has great advantages over other HVDC transmission technologies because of its huge power handling capability, simple design and less initial and maintenance cost. Simple two terminal HVDC technology have evolved so much but the MTDC technology still have some outstanding problems which need to be addressed. Current order sharing between MTDC terminals plays an important role in stable DC transmission and lack of suitable current order sharing causes DC voltage collapse or current saturation problems for terminals. A dynamic current order sharing technique is developed for LCC MTDC system in which terminal current order is being calculated based on current ratio of respective terminal to total current. The technique has ability to readjust current order for each terminal in case of any disturbance. A generalized nrec × ninv terminals current order calculation method is also proposed for MTDC system. The method is investigated under fault conditions in PSCAD to check its feasibility. The results prove that the proposed technique self-adjusts current order as the fault is cleared or any terminal has lost operation.
{"title":"A Generalized N Terminal Current Order Control Scheme for LCC MTDC","authors":"Bilawal Rehman, Chongru Liu","doi":"10.1109/CIEEC.2018.8745739","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745739","url":null,"abstract":"This research work proposes a current order sharing technique for LCC MTDC power system. LCC MTDC architecture has great advantages over other HVDC transmission technologies because of its huge power handling capability, simple design and less initial and maintenance cost. Simple two terminal HVDC technology have evolved so much but the MTDC technology still have some outstanding problems which need to be addressed. Current order sharing between MTDC terminals plays an important role in stable DC transmission and lack of suitable current order sharing causes DC voltage collapse or current saturation problems for terminals. A dynamic current order sharing technique is developed for LCC MTDC system in which terminal current order is being calculated based on current ratio of respective terminal to total current. The technique has ability to readjust current order for each terminal in case of any disturbance. A generalized nrec × ninv terminals current order calculation method is also proposed for MTDC system. The method is investigated under fault conditions in PSCAD to check its feasibility. The results prove that the proposed technique self-adjusts current order as the fault is cleared or any terminal has lost operation.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127494469","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745718
Di Wu, Hongwei Ma, Hao Zheng
Integrated Energy System (IES) is composed of smart grid which is the core system and multi-resource, such as thermal system and oil and gas system etc. IES realizes electricity-gas-cold-heat multi-energy complementary and resource-network-loads-storage coordination control. Now the simulation for single energy such as electrical power system, thermodynamic system, petroleum system has developed well, and the universities and research institutions are researching and developing the IES simulation system to meet the requirements of IES network planning, construction, operation, multi-energy coupling, coordination optimization. From the construction requirements of IES, this paper analyzes the significance of the IES hybrid simulation technology, proposes the simulation research technical route and difficulties from the three aspects of phased modeling, multi-mode hybrid simulation and solving and calculation. At last, an application case of hybrid simulation technology for IES is illustrated by a classic example of CCHP (Combined Cooling Heating and Power) system.
{"title":"Key Technology Summary for Integrated Energy System Hybrid Simulation","authors":"Di Wu, Hongwei Ma, Hao Zheng","doi":"10.1109/CIEEC.2018.8745718","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745718","url":null,"abstract":"Integrated Energy System (IES) is composed of smart grid which is the core system and multi-resource, such as thermal system and oil and gas system etc. IES realizes electricity-gas-cold-heat multi-energy complementary and resource-network-loads-storage coordination control. Now the simulation for single energy such as electrical power system, thermodynamic system, petroleum system has developed well, and the universities and research institutions are researching and developing the IES simulation system to meet the requirements of IES network planning, construction, operation, multi-energy coupling, coordination optimization. From the construction requirements of IES, this paper analyzes the significance of the IES hybrid simulation technology, proposes the simulation research technical route and difficulties from the three aspects of phased modeling, multi-mode hybrid simulation and solving and calculation. At last, an application case of hybrid simulation technology for IES is illustrated by a classic example of CCHP (Combined Cooling Heating and Power) system.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114566857","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745788
Qiujun Li, Dong Zhang, Y. Teng, B. Yang, Jichun Li, Liyong Zhang
Electrical energy is in great demand with the development of economy, traditional power transmission can no longer provide enough capacity for the need. HTS power cable could be the most suitable way to achieve large capacity and long distance power transmission. Over the decades, many domestic and foreign superconducting cable projects have been put into operation. From the development of LIPA project and the trend around world, we can see that YBCO HTS power cables especially YBCO DC HTS ones are the main subjects to be investigated. In 2012, A 360m/10kA HTS DC power cable system used to supply power to an electrolytic aluminum industry was built in Henan China. In this paper, based on 10kA HTS DC power cable project, we replace Bi series tapes as YBCO conductors to investigate the thermal stability, which can provide support for building HTS cables with YBCO coated conductors rated at 10kA. We did research on the temperature distribution working at 10kA, as well as over-current situations. Also, we studied the effect of convective coefficient on the temperature rise.
{"title":"Thermal Characteristics of 10kA Class HTS DC Power Cable Under Over-current Conditions","authors":"Qiujun Li, Dong Zhang, Y. Teng, B. Yang, Jichun Li, Liyong Zhang","doi":"10.1109/CIEEC.2018.8745788","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745788","url":null,"abstract":"Electrical energy is in great demand with the development of economy, traditional power transmission can no longer provide enough capacity for the need. HTS power cable could be the most suitable way to achieve large capacity and long distance power transmission. Over the decades, many domestic and foreign superconducting cable projects have been put into operation. From the development of LIPA project and the trend around world, we can see that YBCO HTS power cables especially YBCO DC HTS ones are the main subjects to be investigated. In 2012, A 360m/10kA HTS DC power cable system used to supply power to an electrolytic aluminum industry was built in Henan China. In this paper, based on 10kA HTS DC power cable project, we replace Bi series tapes as YBCO conductors to investigate the thermal stability, which can provide support for building HTS cables with YBCO coated conductors rated at 10kA. We did research on the temperature distribution working at 10kA, as well as over-current situations. Also, we studied the effect of convective coefficient on the temperature rise.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128673925","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745805
Jiaqi Wang, Zhuo Zhang, Z. Xing, Xiangnan Hu, S. He, Jun Lin, X. Bian
The properties of rubber composites are closely related to the compatibility of inorganic filler and rubber matrix. In this work, to prepare silicone rubber (SIR) composite, the commonly used aluminum hydroxide in SIR as filler was replaced by mica with a certain proportion. Through adding mica with good insulation performance, the electrical performance of composites was enhanced. At the same time, the mixing proportion between two kinds of filler was founded to control fillers dispersion on the matrix. As the mica content increased, although the mechanical properties of the composites degenerated slightly, the breakdown strength of the composites increased significantly.
{"title":"Performance of silicone rubber composites by partially replacing aluminum hydroxide with mica","authors":"Jiaqi Wang, Zhuo Zhang, Z. Xing, Xiangnan Hu, S. He, Jun Lin, X. Bian","doi":"10.1109/CIEEC.2018.8745805","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745805","url":null,"abstract":"The properties of rubber composites are closely related to the compatibility of inorganic filler and rubber matrix. In this work, to prepare silicone rubber (SIR) composite, the commonly used aluminum hydroxide in SIR as filler was replaced by mica with a certain proportion. Through adding mica with good insulation performance, the electrical performance of composites was enhanced. At the same time, the mixing proportion between two kinds of filler was founded to control fillers dispersion on the matrix. As the mica content increased, although the mechanical properties of the composites degenerated slightly, the breakdown strength of the composites increased significantly.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129056650","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745768
Chaoqun Liu, Bin Wei, Songcen Wang, Xiaokang Wu, Xian Zhang, Jie Wang, Qingxin Yang
Electric vehicle dynamic wireless power charging technology is to lay the transmitting coil below the ground. When the electric vehicle with receiving coil is running on this road, the power grid is continuously transmitted to the driving motor of electric vehicle through transmitting and receiving coil, thus realizing the dynamic wireless charging of electric vehicle. In recent years, the dynamic wireless charging technology of electric vehicles has attracted more and more attention of research institutes because of its long endurance mileage, small carrying capacity of on-board batteries and flexible charging methods. In this paper, direct field-circuit coupling multi-physical field simulation is carried out to study the influence of parameters on the dynamic coupling process of the dynamic wireless charging system of electric vehicle. Through simulation analysis, the effect of different parameter changes on the system is effectively reflected. And the real working characteristics of the system are estimated.
{"title":"Field Circuit Coupling Analysis of Dynamic Wireless Charging for Electric Vehicle","authors":"Chaoqun Liu, Bin Wei, Songcen Wang, Xiaokang Wu, Xian Zhang, Jie Wang, Qingxin Yang","doi":"10.1109/CIEEC.2018.8745768","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745768","url":null,"abstract":"Electric vehicle dynamic wireless power charging technology is to lay the transmitting coil below the ground. When the electric vehicle with receiving coil is running on this road, the power grid is continuously transmitted to the driving motor of electric vehicle through transmitting and receiving coil, thus realizing the dynamic wireless charging of electric vehicle. In recent years, the dynamic wireless charging technology of electric vehicles has attracted more and more attention of research institutes because of its long endurance mileage, small carrying capacity of on-board batteries and flexible charging methods. In this paper, direct field-circuit coupling multi-physical field simulation is carried out to study the influence of parameters on the dynamic coupling process of the dynamic wireless charging system of electric vehicle. Through simulation analysis, the effect of different parameter changes on the system is effectively reflected. And the real working characteristics of the system are estimated.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"334 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124704637","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 : 2018-11-01DOI: 10.1109/CIEEC.2018.8745962
Xue Zhang, Miao-miao Zheng, Peng Li, Yuwei Li
The hybrid AC/DC microgrid has come to the foreground of electrical region. In order to make full use of the complementary advantages of AC and DC power supply modes and considering source-load coordination, an optimal operation method of the hybrid AC/DC microgrid based on the stochastic chance constrained programming model is proposed in this paper. This method comprises an upper-level model and a lower-level model. The upper-level model optimizes the power supply mode of load side, which aims at minimizing the power transmission loss. The lower-level optimizes the output of distributed power and energy storage equipment of the power supply side, which aims at minimizing the running costs of the hybrid AC/DC microgrid. Then this paper introduces a hybrid intelligent algorithm composed of stochastic simulation, neural network and PSO to solve the uncertain bi-level optimal model. Finally, a simulation example is given to demonstrate the correctness and effectiveness of the proposed method.
{"title":"Optimal Operation Method of Hybrid AC/DC Microgrid Considering Source-load Coordination Based on Uncertain Bi-level Programming","authors":"Xue Zhang, Miao-miao Zheng, Peng Li, Yuwei Li","doi":"10.1109/CIEEC.2018.8745962","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745962","url":null,"abstract":"The hybrid AC/DC microgrid has come to the foreground of electrical region. In order to make full use of the complementary advantages of AC and DC power supply modes and considering source-load coordination, an optimal operation method of the hybrid AC/DC microgrid based on the stochastic chance constrained programming model is proposed in this paper. This method comprises an upper-level model and a lower-level model. The upper-level model optimizes the power supply mode of load side, which aims at minimizing the power transmission loss. The lower-level optimizes the output of distributed power and energy storage equipment of the power supply side, which aims at minimizing the running costs of the hybrid AC/DC microgrid. Then this paper introduces a hybrid intelligent algorithm composed of stochastic simulation, neural network and PSO to solve the uncertain bi-level optimal model. Finally, a simulation example is given to demonstrate the correctness and effectiveness of the proposed method.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124203708","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, most shielding structures are made of conductive materials or ferromagnetic materials. Of course, the prospect of high-temperature superconductors, nanomaterials and composite materials as shielding materials is very optimistic. However, it often needs to make slits on the shield surface for the electrical equipment to ventilate air, dissipate hot, lead wire and etc, which will result in the electromagnetic leakage. The magnetic shielding characteristics simulation of different materials (such as iron, copper and high-temperature superconductors YBCO) cylindrical shields with one or two slits is studied in this paper. The effect of width, length, and direction of slits, the thickness of the shield and the excitation frequency on the magnetic shielding effectiveness is simulated. This paper also presents the effect of the position of two axial slits on the magnetic shielding effectiveness and simulation results show that the shielding effect of asymmetric slits is better than that of symmetrical slits. A preliminary verification of the simulation was carried out through an electromagnetic shielding experiment of the electricity meter, which is consistent with the simulation results.
{"title":"Research on Magnetic Shielding Effectiveness of Different Materials Hollow Cylinder with Slits","authors":"Wanying Zhang, Wanneng Zhu, Tingting Luo, Hongzhe Shen, Shoudao Huang","doi":"10.1109/CIEEC.2018.8745967","DOIUrl":"https://doi.org/10.1109/CIEEC.2018.8745967","url":null,"abstract":"At present, most shielding structures are made of conductive materials or ferromagnetic materials. Of course, the prospect of high-temperature superconductors, nanomaterials and composite materials as shielding materials is very optimistic. However, it often needs to make slits on the shield surface for the electrical equipment to ventilate air, dissipate hot, lead wire and etc, which will result in the electromagnetic leakage. The magnetic shielding characteristics simulation of different materials (such as iron, copper and high-temperature superconductors YBCO) cylindrical shields with one or two slits is studied in this paper. The effect of width, length, and direction of slits, the thickness of the shield and the excitation frequency on the magnetic shielding effectiveness is simulated. This paper also presents the effect of the position of two axial slits on the magnetic shielding effectiveness and simulation results show that the shielding effect of asymmetric slits is better than that of symmetrical slits. A preliminary verification of the simulation was carried out through an electromagnetic shielding experiment of the electricity meter, which is consistent with the simulation results.","PeriodicalId":329285,"journal":{"name":"2018 IEEE 2nd International Electrical and Energy Conference (CIEEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124500447","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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