Pub Date : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510831
Yang Liu, Lisheng Li, Y. Xiong, Weichen Yang, Mingyang Li, Guoqiang Su, S. Miao
This paper proposes a distributed control strategy based on consistency principle to realize the autonomous economic control of DC distribution network. We first utilize dynamic weight updating method to realize the "plug and play" for DGs. Then we construct the consistent control protocol for distribution network, in which the secondary adjustment of incremental cost and voltage is introduced into the traditional droop control strategy for DG to realize the autonomous and economic control for distribution network, as well as maintaining the stability of the system; in the meantime, by introducing the event triggered mechanism into the consistency control protocol, the number of unnecessary communication in the system is reduced, thus reducing the communication cost between DGs and improving the stability of communication system. Finally, the simulation results based on the distribution network model verify the effectiveness of the proposed method.
{"title":"Consistent Economic Control of Distribution Network Considering Event Triggered and Dynamic Weight Updating","authors":"Yang Liu, Lisheng Li, Y. Xiong, Weichen Yang, Mingyang Li, Guoqiang Su, S. Miao","doi":"10.1109/CIEEC50170.2021.9510831","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510831","url":null,"abstract":"This paper proposes a distributed control strategy based on consistency principle to realize the autonomous economic control of DC distribution network. We first utilize dynamic weight updating method to realize the \"plug and play\" for DGs. Then we construct the consistent control protocol for distribution network, in which the secondary adjustment of incremental cost and voltage is introduced into the traditional droop control strategy for DG to realize the autonomous and economic control for distribution network, as well as maintaining the stability of the system; in the meantime, by introducing the event triggered mechanism into the consistency control protocol, the number of unnecessary communication in the system is reduced, thus reducing the communication cost between DGs and improving the stability of communication system. Finally, the simulation results based on the distribution network model verify the effectiveness of the proposed method.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114466160","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 : 2021-05-28DOI: 10.1109/cieec50170.2021.9510308
Xuefeng Zhao, L. Pu, Zeli Ju, W. Duan, Z. Hou, J. Liang, Gangduo Feng
XPLE power cable has widely used in urban power transmission network, and its insulation condition evaluation is usually carried out by power supply company after commissioning to ensure the safety and reliability of XPLE power cable transmission line. there are many off-line insulation condition test technology of XPLE power cable, but the resonant oscillation wave field test is prefered method due to its convenience and flexibility for field test. However, the resonant oscillation wave high voltage generator uses high-speed bidirectional solid-state switch to interrupt the primary current of the excitation transformer, which will produce large amplitude transient switching overvoltage and overcurrent on the excitation transformer. This paper illustrates the transient switching voltage and current overshoot phenomenon by electromagnetic transient simulaiton, and proposes a optimization method for the switching control method of the resonant oscillation wave high voltage generator. The results of the electromagnetic transient simulaiton has shown that the transient switching overvoltage on the excitation transformer windings can be effectively suppressed.
{"title":"Study on Electromagnetic Transient of the Resonant Oscillation Wave Field Test","authors":"Xuefeng Zhao, L. Pu, Zeli Ju, W. Duan, Z. Hou, J. Liang, Gangduo Feng","doi":"10.1109/cieec50170.2021.9510308","DOIUrl":"https://doi.org/10.1109/cieec50170.2021.9510308","url":null,"abstract":"XPLE power cable has widely used in urban power transmission network, and its insulation condition evaluation is usually carried out by power supply company after commissioning to ensure the safety and reliability of XPLE power cable transmission line. there are many off-line insulation condition test technology of XPLE power cable, but the resonant oscillation wave field test is prefered method due to its convenience and flexibility for field test. However, the resonant oscillation wave high voltage generator uses high-speed bidirectional solid-state switch to interrupt the primary current of the excitation transformer, which will produce large amplitude transient switching overvoltage and overcurrent on the excitation transformer. This paper illustrates the transient switching voltage and current overshoot phenomenon by electromagnetic transient simulaiton, and proposes a optimization method for the switching control method of the resonant oscillation wave high voltage generator. The results of the electromagnetic transient simulaiton has shown that the transient switching overvoltage on the excitation transformer windings can be effectively suppressed.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471283","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9511030
Xiaosong Wang, T. Zhao, L. Zou, Xiaolong Wang, Li Zhang, Xiuqing Yi
Polyphenylene Sulfide (PPS) has good thermal stability and electrical properties, and is often used in the insulation of electrical equipment such as transformers. Taking PPS as the research object, this paper adopts reactive molecular dynamics simulation based on reactive force field (ReaxFF) to study pyrolysis and electric-caused disintegration mechanisms of PPS at the microscopic level. The results indicate that thioether bond (C-S bond) and delocalized π bond (C-C bond) are respectively the first to break under high temperature and high electric field intensity. The cleavage of chemical bonds leads to the decrease of polymerization degree, which is the main cause for PPS insulation aging. The products of PPS molecules under high temperature and electric field are basically similar, including C2H2, H2S and etc. These gas products will accumulate inside the PPS and generate micropores, which may result in partial discharge and further damage to the insulation of PPS. We found the electric field stresses and deforms PPS molecules by weakening the van der Waals force of the polymer system. The decrease of degree of polymerization (DP) rapidly deteriorates the resistance of PPS chains to high electric field intensity, which leads to structural damage and further insulation damage of PPS material.
{"title":"Molecular Dynamics Simulation of Pyrolysis and Electric-caused Disintegration Mechanism of Polyphenylene Sulfide","authors":"Xiaosong Wang, T. Zhao, L. Zou, Xiaolong Wang, Li Zhang, Xiuqing Yi","doi":"10.1109/CIEEC50170.2021.9511030","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9511030","url":null,"abstract":"Polyphenylene Sulfide (PPS) has good thermal stability and electrical properties, and is often used in the insulation of electrical equipment such as transformers. Taking PPS as the research object, this paper adopts reactive molecular dynamics simulation based on reactive force field (ReaxFF) to study pyrolysis and electric-caused disintegration mechanisms of PPS at the microscopic level. The results indicate that thioether bond (C-S bond) and delocalized π bond (C-C bond) are respectively the first to break under high temperature and high electric field intensity. The cleavage of chemical bonds leads to the decrease of polymerization degree, which is the main cause for PPS insulation aging. The products of PPS molecules under high temperature and electric field are basically similar, including C2H2, H2S and etc. These gas products will accumulate inside the PPS and generate micropores, which may result in partial discharge and further damage to the insulation of PPS. We found the electric field stresses and deforms PPS molecules by weakening the van der Waals force of the polymer system. The decrease of degree of polymerization (DP) rapidly deteriorates the resistance of PPS chains to high electric field intensity, which leads to structural damage and further insulation damage of PPS material.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114609683","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510760
Shi-guo Ma, Jian Wu
The mechanism of the electric field for heat transfer enhancement with needle-to-ring corona discharges is studied by experiment. Results show that discharge is easier to occur when negative voltage is applied and the electrical characteristics still obey Townsend's equation. The time-averaged velocity field results demonstrate that positive corona produces ionic wind more effectively than negative corona. In addition, it is found that ionic wind can dramatically enhance heat transfer. The enhancement effect of positive discharge is more significant than that of negative one.
{"title":"Experimental Study on Corona Discharge Characteristics and Heat Transfer Enhancement Application at Atmospheric Pressure","authors":"Shi-guo Ma, Jian Wu","doi":"10.1109/CIEEC50170.2021.9510760","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510760","url":null,"abstract":"The mechanism of the electric field for heat transfer enhancement with needle-to-ring corona discharges is studied by experiment. Results show that discharge is easier to occur when negative voltage is applied and the electrical characteristics still obey Townsend's equation. The time-averaged velocity field results demonstrate that positive corona produces ionic wind more effectively than negative corona. In addition, it is found that ionic wind can dramatically enhance heat transfer. The enhancement effect of positive discharge is more significant than that of negative one.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114753982","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}
In order to suppress the negative effects of the common-mode voltage (CMV) generated in the permanent magnet synchronous motor (PMSM) control system, an improved space vector modulation method for CMV reduction is proposed in this paper. Compared with traditional space vector pulse width modulation (SVPWM), it has same modulation range and has great dynamic and steady-state performance when used in the PMSM control system. In addition, it can reduce the amplitude of CMV from VDC/2 to VDC/6. Comparisons with existing modulation methods, as well as, experimental results are provided to verify feasibility and stability of the proposed method.
{"title":"An Improved Space Vector Modulation Method for the Reduction of Common-Mode Voltages in PMSM Control System","authors":"Wei Zhang, Xin Jiang, Xiaohui Li, Yong Yang, Mingdi Fan, Liqun He, Aimin Ji","doi":"10.1109/CIEEC50170.2021.9510389","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510389","url":null,"abstract":"In order to suppress the negative effects of the common-mode voltage (CMV) generated in the permanent magnet synchronous motor (PMSM) control system, an improved space vector modulation method for CMV reduction is proposed in this paper. Compared with traditional space vector pulse width modulation (SVPWM), it has same modulation range and has great dynamic and steady-state performance when used in the PMSM control system. In addition, it can reduce the amplitude of CMV from VDC/2 to VDC/6. Comparisons with existing modulation methods, as well as, experimental results are provided to verify feasibility and stability of the proposed method.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114679788","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9510872
Haixu Chen, C. Bi
The equivalent circuit model is an effective tool in the research of 3-phase induction motor. It can convert the complex electromagnetic phenomena into circuit ones and enable the study of motor control and operation to be processed with circuit theory and circuit analysis tools. Obviously, to achieve precise control of the induction motor, it is necessary to use the precise circuit parameters, and master how parameters change with voltage, current and frequency of the motor. Based on the equivalent circuit model with parallel excitation branch considering iron loss, the measurement methods to obtain the precise parameters are introduced and analyzed in the paper. The results show clearly the reasonable ways to get the precise motor parameters, which is significant to the R&D on high performance induction motor control and application.
{"title":"Influence of Driving State on Parameters of Three-phase Induction Motor","authors":"Haixu Chen, C. Bi","doi":"10.1109/CIEEC50170.2021.9510872","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510872","url":null,"abstract":"The equivalent circuit model is an effective tool in the research of 3-phase induction motor. It can convert the complex electromagnetic phenomena into circuit ones and enable the study of motor control and operation to be processed with circuit theory and circuit analysis tools. Obviously, to achieve precise control of the induction motor, it is necessary to use the precise circuit parameters, and master how parameters change with voltage, current and frequency of the motor. Based on the equivalent circuit model with parallel excitation branch considering iron loss, the measurement methods to obtain the precise parameters are introduced and analyzed in the paper. The results show clearly the reasonable ways to get the precise motor parameters, which is significant to the R&D on high performance induction motor control and application.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114915067","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}
The intermittent characteristic of power loads threatens the frequency stability of power systems. In order to ensure the reliability of the user-side power supply, proper load frequency control (LFC) methods are often applied to eliminate frequency deviation. In this paper, the scheduling strategy for the thermostatically controlled loads (TCL) aggregator is proposed, and the demand-side response technology is adopted for the frequency regulation of multi-area interconnected power systems. The optimal fractional-order PID (FOPID) controller based on the particle swarm optimization (PSO) algorithm is proposed and applied to the regional frequency deviation suppression. Moreover, the simulation experiments are carried out in two-area interconnected power systems to verify the control effect of the FOPID and the TCL aggregator scheduling strategy.
{"title":"Fractional-order PID Load Frequency Control for Power Systems Incorporating Thermostatically Controlled Loads","authors":"Hao Chen, Leijun Xiang, Liaoyuan Lin, Shun-Chi Huang","doi":"10.1109/CIEEC50170.2021.9510621","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510621","url":null,"abstract":"The intermittent characteristic of power loads threatens the frequency stability of power systems. In order to ensure the reliability of the user-side power supply, proper load frequency control (LFC) methods are often applied to eliminate frequency deviation. In this paper, the scheduling strategy for the thermostatically controlled loads (TCL) aggregator is proposed, and the demand-side response technology is adopted for the frequency regulation of multi-area interconnected power systems. The optimal fractional-order PID (FOPID) controller based on the particle swarm optimization (PSO) algorithm is proposed and applied to the regional frequency deviation suppression. Moreover, the simulation experiments are carried out in two-area interconnected power systems to verify the control effect of the FOPID and the TCL aggregator scheduling strategy.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114970635","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 : 2021-05-28DOI: 10.1109/CIEEC50170.2021.9511004
W. Linyuan, S. Shan, Ye HaoLiang, Xu Zheng, Zhang Zheren
In the offshore wind power transmission system(WPTS) through the AC submarine cable(SC), as the scale of the offshore wind farm(WF) gradually increases and the SC distance of the transmission system continues to increase, the high capacitance characteristics of the long SC will cause a large overvoltage along the SC line, which has an impact on the safe operation of offshore WFs and onshore power grids. Aiming at engineering reality, this paper builds an electromagnetic transient simulation model in PSCAD/EMTDC, and simulates and calculates the power frequency overvoltage(PFOV) along the SC line under different short-circuit capacities of the system, different active power output of offshore WFs, and different fault points. Using the MultipleRun component, this paper calculates the overvoltage along the SC for three-phase asynchronous closing and the opening overvoltage of a reignition of the circuit breaker. The research results show that the dual-terminal high-impedance configuration has a certain limiting effect on the PFOV and operating overvoltage of the submarine cable.
{"title":"Simulation Research on Transient Overvoltage of Offshore Wind Farm Transmission System by 220kV Long-distance AC Submarine Cable","authors":"W. Linyuan, S. Shan, Ye HaoLiang, Xu Zheng, Zhang Zheren","doi":"10.1109/CIEEC50170.2021.9511004","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9511004","url":null,"abstract":"In the offshore wind power transmission system(WPTS) through the AC submarine cable(SC), as the scale of the offshore wind farm(WF) gradually increases and the SC distance of the transmission system continues to increase, the high capacitance characteristics of the long SC will cause a large overvoltage along the SC line, which has an impact on the safe operation of offshore WFs and onshore power grids. Aiming at engineering reality, this paper builds an electromagnetic transient simulation model in PSCAD/EMTDC, and simulates and calculates the power frequency overvoltage(PFOV) along the SC line under different short-circuit capacities of the system, different active power output of offshore WFs, and different fault points. Using the MultipleRun component, this paper calculates the overvoltage along the SC for three-phase asynchronous closing and the opening overvoltage of a reignition of the circuit breaker. The research results show that the dual-terminal high-impedance configuration has a certain limiting effect on the PFOV and operating overvoltage of the submarine cable.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117288810","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}
Both droop control and virtual synchronous generator (VSG) control can be widely seen used in voltage source inverter. Among them, the virtual inertia and damping characteristics VSG control has the ability to provide virtual inertia factors that droop control does not have, but its active power response speed is very slow, and there is a large overshoot. Aiming at the problem of poor active power transient characteristics of VSG control, a generalized VSG control strategy is proposed. First, the article analyzes the transient characteristics of the active power-frequency loop of droop control and VSG control, and derives the generalized VSG control strategy. Then, according to the system model, the influence of the pole-zero point of the main controller of generalized VSG control strategy on the frequency response speed, the response speed and overshoot of active power is analyzed. And on this basis, a parameter design parameter design method is given, which can eliminate active power overshoot and make the active power response as fast as possible while keeping the frequency response speed unchanged. Finally, an inverter grid-connected bench was built to verify the effectiveness and feasibility of the proposed generalized VSG control strategy.
{"title":"Generalized VSG Control Strategy for Active Power Transient Characteristic Optimization of Voltage Source Inverter","authors":"Xuezheng Huang, Changsong Chen, Wenhao Hu, Mengjie Jiang, Haowen Chen","doi":"10.1109/CIEEC50170.2021.9510597","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510597","url":null,"abstract":"Both droop control and virtual synchronous generator (VSG) control can be widely seen used in voltage source inverter. Among them, the virtual inertia and damping characteristics VSG control has the ability to provide virtual inertia factors that droop control does not have, but its active power response speed is very slow, and there is a large overshoot. Aiming at the problem of poor active power transient characteristics of VSG control, a generalized VSG control strategy is proposed. First, the article analyzes the transient characteristics of the active power-frequency loop of droop control and VSG control, and derives the generalized VSG control strategy. Then, according to the system model, the influence of the pole-zero point of the main controller of generalized VSG control strategy on the frequency response speed, the response speed and overshoot of active power is analyzed. And on this basis, a parameter design parameter design method is given, which can eliminate active power overshoot and make the active power response as fast as possible while keeping the frequency response speed unchanged. Finally, an inverter grid-connected bench was built to verify the effectiveness and feasibility of the proposed generalized VSG control strategy.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116411093","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}
Lightning parameters are indispensable key parameters in lightning protection design. Based on the ground lightning data from the Hainan lightning location system in 2009, the relationships between lightning parameters (the average lightning current amplitude of total ground flashover, the proportion of positive and the negative flashover, and total ground flashover density) and terrain curved-surface parameters (slope, slope aspect, and slope position) are studied by means of GIS spatial analysis and mathematical statistics. Firstly, it is concluded that there is a cubic function relationship between the average lightning current amplitude of total ground flashover and slope. The proportion of positive flashover decreases with the increase of slope, and the distribution of total ground flashover density features U-shape with the increase of slope. The lightning protection should be strengthened for the transmission lines built on the mountain with the slope below 10° or above 48°. In addition, when the slope aspect is in the southwest direction, the average lightning current amplitude of total ground flashover and total ground flashover density are the lowest, while the proportion of positive flashover is the largest among all slope aspects. So some anti-backflashover measures should be taken for transmission lines built in the southwest slope aspect. Besides, the average lightning current amplitudes of total ground flashover are the largest and the total ground flashover densities are the highest in ridge and valley among all slope position. Some special lightning protection measures should be considered to be taken in ridge and valley.
{"title":"Research on the Influence of Terrain Curved-Surface on Lightning Parameters","authors":"Hailong Zhao, Dandan Zhang, Songling Pang, Wenwu Pan, Liguo Yang, Shixun Wei","doi":"10.1109/CIEEC50170.2021.9510936","DOIUrl":"https://doi.org/10.1109/CIEEC50170.2021.9510936","url":null,"abstract":"Lightning parameters are indispensable key parameters in lightning protection design. Based on the ground lightning data from the Hainan lightning location system in 2009, the relationships between lightning parameters (the average lightning current amplitude of total ground flashover, the proportion of positive and the negative flashover, and total ground flashover density) and terrain curved-surface parameters (slope, slope aspect, and slope position) are studied by means of GIS spatial analysis and mathematical statistics. Firstly, it is concluded that there is a cubic function relationship between the average lightning current amplitude of total ground flashover and slope. The proportion of positive flashover decreases with the increase of slope, and the distribution of total ground flashover density features U-shape with the increase of slope. The lightning protection should be strengthened for the transmission lines built on the mountain with the slope below 10° or above 48°. In addition, when the slope aspect is in the southwest direction, the average lightning current amplitude of total ground flashover and total ground flashover density are the lowest, while the proportion of positive flashover is the largest among all slope aspects. So some anti-backflashover measures should be taken for transmission lines built in the southwest slope aspect. Besides, the average lightning current amplitudes of total ground flashover are the largest and the total ground flashover densities are the highest in ridge and valley among all slope position. Some special lightning protection measures should be considered to be taken in ridge and valley.","PeriodicalId":110429,"journal":{"name":"2021 IEEE 4th International Electrical and Energy Conference (CIEEC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123663664","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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