Pub Date : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928902
Ziying Zhang, Miaozhong Cai, J. Zou, Zhihui Huang, Ruitong Liu
For HVDC vacuum circuit breaker based on commutation principle, the commutation parameter is the key factor influencing the interrupting performance. In this paper, the DC breaking process is simulated by PSCAD/EMTDC and the result shows that the higher the commutation frequency and the breaking current amplitude, the higher the arc current decline rate is. The commutation parameter and interrupting performance of a DC vacuum breaker prototype are tested through a synthetic DC test circuit. The initial moment of commutation time and the safe stroke of the system are determined. The experimental result shows that when the commutation frequency and the amplitude ratio of breaking current to commutation current are constant, the commutation time is not affected by the breaking current amplitude, but the arc current decline rate increases with the increase of breaking current amplitude. High commutation frequency will make it difficult to break even reignite the arc. What’s more, a high commutation current will result in the higher TRV to the gap, when the breaking current is 5 kA and the commutation current is 8 kA, there will generate a 6 kV recovery voltage at the break, leading to arc reigniting.
{"title":"Experimental Study on Commutation Parameter of HVDC Vacuum Circuit Breaker","authors":"Ziying Zhang, Miaozhong Cai, J. Zou, Zhihui Huang, Ruitong Liu","doi":"10.1109/ICEPE-ST.2019.8928902","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928902","url":null,"abstract":"For HVDC vacuum circuit breaker based on commutation principle, the commutation parameter is the key factor influencing the interrupting performance. In this paper, the DC breaking process is simulated by PSCAD/EMTDC and the result shows that the higher the commutation frequency and the breaking current amplitude, the higher the arc current decline rate is. The commutation parameter and interrupting performance of a DC vacuum breaker prototype are tested through a synthetic DC test circuit. The initial moment of commutation time and the safe stroke of the system are determined. The experimental result shows that when the commutation frequency and the amplitude ratio of breaking current to commutation current are constant, the commutation time is not affected by the breaking current amplitude, but the arc current decline rate increases with the increase of breaking current amplitude. High commutation frequency will make it difficult to break even reignite the arc. What’s more, a high commutation current will result in the higher TRV to the gap, when the breaking current is 5 kA and the commutation current is 8 kA, there will generate a 6 kV recovery voltage at the break, leading to arc reigniting.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115403345","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928892
Baiqiang Li, Shaohua Ma, Z. Cai, Yahong Zheng
Reliable calculation model of electromagnetic mechanism characteristics of DC contactor is of great significance to its structural optimization. In this paper, the excitation process of contactor magnet is summarized, and a new calculation model of hysteresis-finite element method is proposed. It can effectively calculate the remanence of the electromagnetic mechanism under different excitation conditions, and give the relationship curve between the remanence flux and the anti-remanence gap.
{"title":"A Novel Method for Calculating Residual Magnetic Flux of DC Contactors","authors":"Baiqiang Li, Shaohua Ma, Z. Cai, Yahong Zheng","doi":"10.1109/ICEPE-ST.2019.8928892","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928892","url":null,"abstract":"Reliable calculation model of electromagnetic mechanism characteristics of DC contactor is of great significance to its structural optimization. In this paper, the excitation process of contactor magnet is summarized, and a new calculation model of hysteresis-finite element method is proposed. It can effectively calculate the remanence of the electromagnetic mechanism under different excitation conditions, and give the relationship curve between the remanence flux and the anti-remanence gap.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116085052","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928890
Fanglin Chen, X. Pan, H. Zeng, Yongmin Chen, Yi Wu, Yife Wu, Yi Jiang
The DC circuit breaker is the key equipment in the DC power transmission and distribution system. IGCT devices have important application prospects in DC breaking, providing the advantages of large surge current capability and low current conduction losses. Aiming at the on-off electrical characteristics of IGCT, this paper provides the optimized design method for improving the current turn-off capability and reducing the on-state voltage drop of IGCT, in which the GCT longitudinal optimization structure for DC breaking conditions is obtained. Meanwhile, for IGCT compact modular application, the gate unit (GU) is miniaturized and isolated, and GU can be replaced without decompression. Moreover, the GU power supply, series-parallel application and control protection technology optimization are carried out for the practical application requirements. Finally, the validity and feasibility of proposed method are verified by simulation and module test.
{"title":"Study on Performance Optimization of IGCT Device for DC Circuit Breaker","authors":"Fanglin Chen, X. Pan, H. Zeng, Yongmin Chen, Yi Wu, Yife Wu, Yi Jiang","doi":"10.1109/ICEPE-ST.2019.8928890","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928890","url":null,"abstract":"The DC circuit breaker is the key equipment in the DC power transmission and distribution system. IGCT devices have important application prospects in DC breaking, providing the advantages of large surge current capability and low current conduction losses. Aiming at the on-off electrical characteristics of IGCT, this paper provides the optimized design method for improving the current turn-off capability and reducing the on-state voltage drop of IGCT, in which the GCT longitudinal optimization structure for DC breaking conditions is obtained. Meanwhile, for IGCT compact modular application, the gate unit (GU) is miniaturized and isolated, and GU can be replaced without decompression. Moreover, the GU power supply, series-parallel application and control protection technology optimization are carried out for the practical application requirements. Finally, the validity and feasibility of proposed method are verified by simulation and module test.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124739640","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928829
Q. Yi, Fei Yang, Yife Wu, Wentao Liu, Yi Wu, M. Rong, S. Bai
Hybrid DC circuit breakers (HDCCB) based on high-power full-control semiconductor devices have attracted extensive attention and research for their large current conduction and fast current breaking capability. The IGCT device possesses a strong surge current withstand capability and low on-state voltage drop, making it a promising full-controlled semiconductor candidate. To meet the requirements of the increasing DC power capacity, the current turn-off capability of DC circuit breakers must be improved, this paper studies the power electronic switch based on parallel IGCT devices. Firstly, the modular IGCT component circuit topology which is easy to be series connected is proposed, and the mechanism analysis of the parallel current distribution imbalance is carried out. The single-stage laboratory prototype is built up to study the switch on-off characteristics. To promote the parallel current distribution effect, an asynchronous control method is proposed, and the control effects of different time differences are studied. Finally, the validity and feasibility of the differential control are verified by experiments.
{"title":"Asynchronous Control Method of Parallel IGCT Components in Hybrid DC Circuit Breakers","authors":"Q. Yi, Fei Yang, Yife Wu, Wentao Liu, Yi Wu, M. Rong, S. Bai","doi":"10.1109/ICEPE-ST.2019.8928829","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928829","url":null,"abstract":"Hybrid DC circuit breakers (HDCCB) based on high-power full-control semiconductor devices have attracted extensive attention and research for their large current conduction and fast current breaking capability. The IGCT device possesses a strong surge current withstand capability and low on-state voltage drop, making it a promising full-controlled semiconductor candidate. To meet the requirements of the increasing DC power capacity, the current turn-off capability of DC circuit breakers must be improved, this paper studies the power electronic switch based on parallel IGCT devices. Firstly, the modular IGCT component circuit topology which is easy to be series connected is proposed, and the mechanism analysis of the parallel current distribution imbalance is carried out. The single-stage laboratory prototype is built up to study the switch on-off characteristics. To promote the parallel current distribution effect, an asynchronous control method is proposed, and the control effects of different time differences are studied. Finally, the validity and feasibility of the differential control are verified by experiments.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129315258","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928759
Liqiong Sun, Yuecheng Li, Jiankun Liu, Yi Li, Zhenxing Wang, Jianhua Wang, Yingsan Geng, Zhiyuan Liu
Vacuum arc cathode spots are centers of metal vapor evaporation, electron emission and plasma production. Arc properties are dominated by the behavior of the cathode spots. A systematic investigation on the density of copper metal vapor emitted from a single cathode spot is benefit for understanding the mechanism of vacuum arc discharge. The objective of this paper is to get the spatial density distribution of copper neutral atoms emitted from a single cathode spot in ~55A vacuum arc by planar Laser Induced Fluorescence (LIF) method. The experiments are conducted with CuCr10 (Cr weight of 10%) butt contacts in a demountable vacuum chamber. 2D distribution of copper metal vapor density is photographed by an intensified CCD cameral (i-CCD) with an exposure time of 50 ns. The uniform constant Axial Magnetic Field (AMF) within the inter-contacts region is supplied by Helmholtz coils. 2D copper vapor density distribution between two electrodes as well as the influence of external AMF on vapor density distribution are investigated. When the arc current is ~55 A, a typical cathode spot or two spots are observed in the experiments. Copper vapor density reaches the maximum value 6×1019 m-3 in the center of cathode spot.
{"title":"Two-Dimensional Observation of Single Cathode Spot Copper Vapor in Vacuum Arcs by Laser-Induced Fluorescence","authors":"Liqiong Sun, Yuecheng Li, Jiankun Liu, Yi Li, Zhenxing Wang, Jianhua Wang, Yingsan Geng, Zhiyuan Liu","doi":"10.1109/ICEPE-ST.2019.8928759","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928759","url":null,"abstract":"Vacuum arc cathode spots are centers of metal vapor evaporation, electron emission and plasma production. Arc properties are dominated by the behavior of the cathode spots. A systematic investigation on the density of copper metal vapor emitted from a single cathode spot is benefit for understanding the mechanism of vacuum arc discharge. The objective of this paper is to get the spatial density distribution of copper neutral atoms emitted from a single cathode spot in ~55A vacuum arc by planar Laser Induced Fluorescence (LIF) method. The experiments are conducted with CuCr10 (Cr weight of 10%) butt contacts in a demountable vacuum chamber. 2D distribution of copper metal vapor density is photographed by an intensified CCD cameral (i-CCD) with an exposure time of 50 ns. The uniform constant Axial Magnetic Field (AMF) within the inter-contacts region is supplied by Helmholtz coils. 2D copper vapor density distribution between two electrodes as well as the influence of external AMF on vapor density distribution are investigated. When the arc current is ~55 A, a typical cathode spot or two spots are observed in the experiments. Copper vapor density reaches the maximum value 6×1019 m-3 in the center of cathode spot.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130872203","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928709
Jianying Zhong, S. Pang, Yanwei Nan, Haonan Sun, Wenkui Liu
Due to its environment-friendless and excellent insulation performance, C4F7N and its mixtures with CO2 have received extensive attention as SF6 substitute gas in recent years. However, the experimental test on arc distinguish performance of C4F7N and its mixtures is quite expensive and time consuming. Therefore, it is very important to investigate the arc plasma behavior in C4F7N and to make a comparation with arc plasma in SF6 by means of simulation. In this thesis, a 2D axial symmetry nozzle model based on the magneto-hydrodynamics theory has been built and calculated. The basic arc parameters are described by the coupled equations of fluid field and electromagnetic field. The temperature distribution of arc plasma in C4F7N, CO2 and SF6 has been calculated. The C4F7N arc has a similar arc radius to SF6 arc in steady state. And the turbulence effect may need to be consider in the C4F7N arc simulation.
{"title":"Simulation and Comparison of Arc Characteristics in C4F7N,CO2 and SF6","authors":"Jianying Zhong, S. Pang, Yanwei Nan, Haonan Sun, Wenkui Liu","doi":"10.1109/ICEPE-ST.2019.8928709","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928709","url":null,"abstract":"Due to its environment-friendless and excellent insulation performance, C<inf>4</inf>F<inf>7</inf>N and its mixtures with CO<inf>2</inf> have received extensive attention as SF<inf>6</inf> substitute gas in recent years. However, the experimental test on arc distinguish performance of C<inf>4</inf>F<inf>7</inf>N and its mixtures is quite expensive and time consuming. Therefore, it is very important to investigate the arc plasma behavior in C<inf>4</inf>F<inf>7</inf>N and to make a comparation with arc plasma in SF<inf>6</inf> by means of simulation. In this thesis, a 2D axial symmetry nozzle model based on the magneto-hydrodynamics theory has been built and calculated. The basic arc parameters are described by the coupled equations of fluid field and electromagnetic field. The temperature distribution of arc plasma in C<inf>4</inf>F<inf>7</inf>N, CO<inf>2</inf> and SF<inf>6</inf> has been calculated. The C<inf>4</inf>F<inf>7</inf>N arc has a similar arc radius to SF<inf>6</inf> arc in steady state. And the turbulence effect may need to be consider in the C<inf>4</inf>F<inf>7</inf>N arc simulation.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"47 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125025037","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}
With the development of DC grid technology, the application of hybrid DC switches is more and more extensive, and the reliability and life requirements of hybrid DC contactors are also increasing. As the core unit of hybrid DC contactor, mechanical switch is optimized to improve the reliability and life of the switch. In this paper, based on the 6 Sigma design method, the optimization design of the monostable permanent magnet mechanism is studied. The structural parameters were optimized with the closing force as the objective function, and the significant factors and non-significant factors were analyzed. The best factor level combination was selected to reduce the fluctuation of quality characteristics to improve the reliability of the switch and make the tolerance design reach the level of 6 Sigma. This method combines parameter optimization with reliability design and has great practical value. Finally, the experimental platform was built to verify the mechanical characteristics of the mechanical switch prototype. The experimental results verified that the opening and closing characteristics meet the design requirements.
{"title":"Optimization Design of Permanent Magnet Mechanism Based on 6 Sigma Design Method","authors":"Hao Qin, Guogang Zhang, Lu Qi, Yakui Liu, Jianhua Wang, Yingsan Geng","doi":"10.1109/ICEPE-ST.2019.8928739","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928739","url":null,"abstract":"With the development of DC grid technology, the application of hybrid DC switches is more and more extensive, and the reliability and life requirements of hybrid DC contactors are also increasing. As the core unit of hybrid DC contactor, mechanical switch is optimized to improve the reliability and life of the switch. In this paper, based on the 6 Sigma design method, the optimization design of the monostable permanent magnet mechanism is studied. The structural parameters were optimized with the closing force as the objective function, and the significant factors and non-significant factors were analyzed. The best factor level combination was selected to reduce the fluctuation of quality characteristics to improve the reliability of the switch and make the tolerance design reach the level of 6 Sigma. This method combines parameter optimization with reliability design and has great practical value. Finally, the experimental platform was built to verify the mechanical characteristics of the mechanical switch prototype. The experimental results verified that the opening and closing characteristics meet the design requirements.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125443035","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928714
Yufei Cui, Yi Wu, M. Rong, Haodong Chang, Weiping Guan
an in-situ diagnostic system with respect to the determination of the surface temperature and the splashing erosion quantities was established. Comparative study on the transition phenomenon of the erosion mode of W70Cu30 anode was carried out in Ar and H2. Two erosion modes were identified, namely an evaporation-dominated mode and a splash-dominated mode. The results indicate that the detachment of the splashing droplet is driven by the explosion of surface bubbles. Moreover, it is found that the discrepancy in the melting and boiling points of the copper phase and the tungsten skeleton limits the anode surface temperature at first, but promotes the molten ejections through the bubble burst which originates from the copper vapor, when the copper layer above the tungsten skeleton is depleted. These characteristics control the formation of molten pool on the W70Cu30 anode, and lead to the transition of two erosion modes.
{"title":"Comparative Study on the Erosion Mechanism of W70Cu30 Anode in DC Gaseous Arcs","authors":"Yufei Cui, Yi Wu, M. Rong, Haodong Chang, Weiping Guan","doi":"10.1109/ICEPE-ST.2019.8928714","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928714","url":null,"abstract":"an in-situ diagnostic system with respect to the determination of the surface temperature and the splashing erosion quantities was established. Comparative study on the transition phenomenon of the erosion mode of W70Cu30 anode was carried out in Ar and H2. Two erosion modes were identified, namely an evaporation-dominated mode and a splash-dominated mode. The results indicate that the detachment of the splashing droplet is driven by the explosion of surface bubbles. Moreover, it is found that the discrepancy in the melting and boiling points of the copper phase and the tungsten skeleton limits the anode surface temperature at first, but promotes the molten ejections through the bubble burst which originates from the copper vapor, when the copper layer above the tungsten skeleton is depleted. These characteristics control the formation of molten pool on the W70Cu30 anode, and lead to the transition of two erosion modes.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126009869","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928889
Hyun Woo Kim
A high voltage circuit breaker was mainly used to prevent accidents that may occur during transmission and distribution. The specifications of circuit breaker and energy of mechanism were decided by voltage and current level. It is important to satisfy electric and mechanical performance of circuit breaker. In mechanical performance, the reliability of circuit breaker is related to the IEC 62271-102 standards. The mechanical endurance of interrupter is M2 class and the number of operating cycles is 10,000. In past, the repeated tests were performed to satisfy the reliability of circuit breaker, so the time and cost were very high. To reduce the time and cost, there were many studies that predict the dynamic behavior and reliability of circuit breaker. In this study, the dynamic loads were measured to analyze 550kV circuit breaker. The multibody dynamic analysis models were developed by using RecurDyn program. And the simulation results were validated with experimental results. The fatigue analysis and evaluation were executed by using simulation and experimental results.
{"title":"Fatigue Evaluation and Flexible Multibody Dynamic Analysis of 550kV High Voltage Circuit Breaker","authors":"Hyun Woo Kim","doi":"10.1109/ICEPE-ST.2019.8928889","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928889","url":null,"abstract":"A high voltage circuit breaker was mainly used to prevent accidents that may occur during transmission and distribution. The specifications of circuit breaker and energy of mechanism were decided by voltage and current level. It is important to satisfy electric and mechanical performance of circuit breaker. In mechanical performance, the reliability of circuit breaker is related to the IEC 62271-102 standards. The mechanical endurance of interrupter is M2 class and the number of operating cycles is 10,000. In past, the repeated tests were performed to satisfy the reliability of circuit breaker, so the time and cost were very high. To reduce the time and cost, there were many studies that predict the dynamic behavior and reliability of circuit breaker. In this study, the dynamic loads were measured to analyze 550kV circuit breaker. The multibody dynamic analysis models were developed by using RecurDyn program. And the simulation results were validated with experimental results. The fatigue analysis and evaluation were executed by using simulation and experimental results.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114263461","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 : 2019-10-01DOI: 10.1109/ICEPE-ST.2019.8928686
Xiaomin Zhao, Mingfei Wang, Yi Wu, Yuang Xiao, Yife Wu, Xiao Gu, Wenkui Liu
The repulsive mechanism has the advantages of short response time, fast opening speed and simple structure, and fully matches the short circuit breaking of the DC system to quickly establish the insulation gap, widely used in medium voltage DC circuit breakers. In this paper, a bistable permanent magnet repulsive mechanism of 10kV DC circuit breaker is proposed. The magnetostatic research is carried out for the permanent magnet holding mechanism and the repulsive mechanism, and based on the research results, the experimental prototype is built and the prototype experiment is completed. The reliability of the function of bistable permanent magnet repulsion mechanism is verified by the experiment. According to the breaking demand of 10kV DC circuit breaker, the overall design scheme of a bistable permanent magnet repulsive mechanism is proposed. According to the theory of electromagnetic field, the magnetostatic model and dynamic model of the permanent magnet mechanism are built. The influence of key structural parameters on the static retention characteristics is studied, and the structural parameters of the permanent magnet mechanism are determined. Based on the parameters calculated by the simulation, an experimental prototype of the bistable permanent magnet repulsive mechanism is built. The experimental scheme of the rated opening test and the rapid opening test is designed, and the prototype rated breaking curve, the quick opening response time curve and the quick opening characteristic curve are obtained. Comparing the experimental results with the requirements of the circuit breaker, the breaking characteristics of the repulsive mechanism can meet the two breaking requirements of the rated breaking and short-circuit breaking of the circuit breaker, and verify the feasibility of the prototype of the repulsive mechanism. The simulation results and experimental results verify the accuracy and practicability of the simulation model within an acceptable error range.
{"title":"Design of Bistable Permanent Magnet-Repeat Mechanism for Medium Voltage DC High Speed Switch","authors":"Xiaomin Zhao, Mingfei Wang, Yi Wu, Yuang Xiao, Yife Wu, Xiao Gu, Wenkui Liu","doi":"10.1109/ICEPE-ST.2019.8928686","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2019.8928686","url":null,"abstract":"The repulsive mechanism has the advantages of short response time, fast opening speed and simple structure, and fully matches the short circuit breaking of the DC system to quickly establish the insulation gap, widely used in medium voltage DC circuit breakers. In this paper, a bistable permanent magnet repulsive mechanism of 10kV DC circuit breaker is proposed. The magnetostatic research is carried out for the permanent magnet holding mechanism and the repulsive mechanism, and based on the research results, the experimental prototype is built and the prototype experiment is completed. The reliability of the function of bistable permanent magnet repulsion mechanism is verified by the experiment. According to the breaking demand of 10kV DC circuit breaker, the overall design scheme of a bistable permanent magnet repulsive mechanism is proposed. According to the theory of electromagnetic field, the magnetostatic model and dynamic model of the permanent magnet mechanism are built. The influence of key structural parameters on the static retention characteristics is studied, and the structural parameters of the permanent magnet mechanism are determined. Based on the parameters calculated by the simulation, an experimental prototype of the bistable permanent magnet repulsive mechanism is built. The experimental scheme of the rated opening test and the rapid opening test is designed, and the prototype rated breaking curve, the quick opening response time curve and the quick opening characteristic curve are obtained. Comparing the experimental results with the requirements of the circuit breaker, the breaking characteristics of the repulsive mechanism can meet the two breaking requirements of the rated breaking and short-circuit breaking of the circuit breaker, and verify the feasibility of the prototype of the repulsive mechanism. The simulation results and experimental results verify the accuracy and practicability of the simulation model within an acceptable error range.","PeriodicalId":392306,"journal":{"name":"2019 5th International Conference on Electric Power Equipment - Switching Technology (ICEPE-ST)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114221684","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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