Pub Date : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6122977
Lv Jinbo, W. Yi, Xie Jiangjian, Bai Xiaolei, Meng Fei
Based on the analysis of the drive circuit for both mono-stable and bi-stable vacuum circuit breaker (VCB), a controller can control both of them was designed in this paper. A new method was introduced to determine the actual state of the VCB that had just executed the switching command. The method divided the curve of the drive current into three periods, and analyzed the state of the moving contact. An algorithm was implemented, which was used to detect the similarity between the idea drive current and the actual one acquired by the controller, to determine the state of contacts in VCB. Experiments were made on VCB, and it was found out that the reliability of closing the VCB could be improved with the method.
{"title":"An efficient method for improving switching reliability of permanent magnetic vacuum circuit breaker","authors":"Lv Jinbo, W. Yi, Xie Jiangjian, Bai Xiaolei, Meng Fei","doi":"10.1109/ICEPE-ST.2011.6122977","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122977","url":null,"abstract":"Based on the analysis of the drive circuit for both mono-stable and bi-stable vacuum circuit breaker (VCB), a controller can control both of them was designed in this paper. A new method was introduced to determine the actual state of the VCB that had just executed the switching command. The method divided the curve of the drive current into three periods, and analyzed the state of the moving contact. An algorithm was implemented, which was used to detect the similarity between the idea drive current and the actual one acquired by the controller, to determine the state of contacts in VCB. Experiments were made on VCB, and it was found out that the reliability of closing the VCB could be improved with the method.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127796942","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6123004
Y. Guan, Y. Yokomizu, K. Okuda, K. Higuchi, T. Matsumura
A flat type of the superconducting fault current limiter (FCL) was investigated to find out its inductance components and magnetic-flux linkage in a coil over a wide ac current range. This FCL consists principally of a pancake coil stacked on a YBCO thin-film disk. Two types of the miniature model FCLs were constructed: 1) a one-layer coil and one YBCO disk (called ‘basic structure’) and 2) one-layer coil sandwiched by two YBCO disks (called ‘sandwich structure’). Results of current-carrying experiment showed that the sandwich structure had the residual inductance of 20 µH at low currents below 12 Apeak, but raising the inductance to 84 µH at currents above 12 Apeak. The sandwich structure also proved to contribute reduction in the residual inductance, in comparison of the basic structure. The magnetic flux linkage in the coil was evaluated to interpret the behavior of the proposed FCL. The YBCO disk was found to generate the resistance when the instantaneous-current magnitude increases toward the peak value, whilst generating no resistance at an instant time after the peak current.
{"title":"Rise aspect of limiting inductance of superconducting fault-current limiter with two YBCO thin-film disks","authors":"Y. Guan, Y. Yokomizu, K. Okuda, K. Higuchi, T. Matsumura","doi":"10.1109/ICEPE-ST.2011.6123004","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123004","url":null,"abstract":"A flat type of the superconducting fault current limiter (FCL) was investigated to find out its inductance components and magnetic-flux linkage in a coil over a wide ac current range. This FCL consists principally of a pancake coil stacked on a YBCO thin-film disk. Two types of the miniature model FCLs were constructed: 1) a one-layer coil and one YBCO disk (called ‘basic structure’) and 2) one-layer coil sandwiched by two YBCO disks (called ‘sandwich structure’). Results of current-carrying experiment showed that the sandwich structure had the residual inductance of 20 µH at low currents below 12 Apeak, but raising the inductance to 84 µH at currents above 12 Apeak. The sandwich structure also proved to contribute reduction in the residual inductance, in comparison of the basic structure. The magnetic flux linkage in the coil was evaluated to interpret the behavior of the proposed FCL. The YBCO disk was found to generate the resistance when the instantaneous-current magnitude increases toward the peak value, whilst generating no resistance at an instant time after the peak current.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131448636","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6122961
D. Jeong, S. Woo, K. Seo, J.H. Kim
Gas insulated systems are widely used in the electric power industry for transmission and distribution of electrical energy. When SF6 was first discovered, the potential application was only considered for insulation because of good dielectric properties. But the widespread use of SF6 gas by electric power and other industries has led to increased concentrations of SF6 gas in the atmosphere. This causes concern as to possible effects on global warming because SF6 is a potent greenhouse gas. This paper presents the dielectric strength and insulating property on SF6/N2 mixtures to make design criteria for developing the GIS. Two types of mixed gases (50%SF6_50%N2, 20%SF6_80%N2) were applied. We performed tests for electrode gap, contamination of particles, Triple junction for the spacer and earthing switch and disconnecting switch sections of GIS model. Test gas pressure is from 0.3 to 0.7 MPa. To find the 50% Breakdown voltage, the number of breakdown was performed 15 times and all test results were applied to analyze the normal distribution. The study was conducted to develop environment-friendly GIS under SF6/N2.
{"title":"A study of the insulation property for development of eco-friendly GIS under SF6/N2 mixtures","authors":"D. Jeong, S. Woo, K. Seo, J.H. Kim","doi":"10.1109/ICEPE-ST.2011.6122961","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122961","url":null,"abstract":"Gas insulated systems are widely used in the electric power industry for transmission and distribution of electrical energy. When SF<inf>6</inf> was first discovered, the potential application was only considered for insulation because of good dielectric properties. But the widespread use of SF<inf>6</inf> gas by electric power and other industries has led to increased concentrations of SF<inf>6</inf> gas in the atmosphere. This causes concern as to possible effects on global warming because SF<inf>6</inf> is a potent greenhouse gas. This paper presents the dielectric strength and insulating property on SF<inf>6</inf>/N<inf>2</inf> mixtures to make design criteria for developing the GIS. Two types of mixed gases (50%SF<inf>6</inf>_50%N<inf>2</inf>, 20%SF<inf>6</inf>_80%N<inf>2</inf>) were applied. We performed tests for electrode gap, contamination of particles, Triple junction for the spacer and earthing switch and disconnecting switch sections of GIS model. Test gas pressure is from 0.3 to 0.7 MPa. To find the 50% Breakdown voltage, the number of breakdown was performed 15 times and all test results were applied to analyze the normal distribution. The study was conducted to develop environment-friendly GIS under SF<inf>6</inf>/N<inf>2</inf>.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122508535","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6123008
M. J. Kim, Gyeong-Ho Lee, Seung-Hyun Bang, H. Park, Wonjoon Choe, J. Sim, Seog-Won Lee, Young-geun Kim, Hye-Rim Kim
A 25.8 kV / 630 A hybrid superconducting fault current limiter (SFCL) has successfully designed, tested and finally installed in a real power grid at Icheon substation for the purpose of pre-commercial demonstrations. The hybrid SFCL is composed of high temperature superconductor (HTS), fast switch (FS), and current limiting reactor (CLR) module. In this hybrid SFCL, the HTS module plays a role in sensing fault current and letting the direction of an electric current turn to the FS path. A reduction in amplitude of fault current is done by CLR module. The combination of HTS and FS module made of conventional electrical equipment enables the volume and the cost of total system to be reduced significantly, and the operating reliability to be improved. A short circuit test (12.5 kArms) was conducted and we were able to verify reliable fault current limiting capability of hybrid SFCL. After passing all the required tests, including the impedance test and the electrical insulation test, the hybrid SFCL was installed at Icheon substation in 2010 and now it is waiting for connection to Jang-pyong distribution line (D/L). Recently, a stable operation of HTS cryocooling system was clearly proven through applying load current modeled on the worst fluctuating load among real daily load profiles of Jang-pyong D/L.
{"title":"The application of fault current limiter at Icheon substation in Korea","authors":"M. J. Kim, Gyeong-Ho Lee, Seung-Hyun Bang, H. Park, Wonjoon Choe, J. Sim, Seog-Won Lee, Young-geun Kim, Hye-Rim Kim","doi":"10.1109/ICEPE-ST.2011.6123008","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123008","url":null,"abstract":"A 25.8 kV / 630 A hybrid superconducting fault current limiter (SFCL) has successfully designed, tested and finally installed in a real power grid at Icheon substation for the purpose of pre-commercial demonstrations. The hybrid SFCL is composed of high temperature superconductor (HTS), fast switch (FS), and current limiting reactor (CLR) module. In this hybrid SFCL, the HTS module plays a role in sensing fault current and letting the direction of an electric current turn to the FS path. A reduction in amplitude of fault current is done by CLR module. The combination of HTS and FS module made of conventional electrical equipment enables the volume and the cost of total system to be reduced significantly, and the operating reliability to be improved. A short circuit test (12.5 kArms) was conducted and we were able to verify reliable fault current limiting capability of hybrid SFCL. After passing all the required tests, including the impedance test and the electrical insulation test, the hybrid SFCL was installed at Icheon substation in 2010 and now it is waiting for connection to Jang-pyong distribution line (D/L). Recently, a stable operation of HTS cryocooling system was clearly proven through applying load current modeled on the worst fluctuating load among real daily load profiles of Jang-pyong D/L.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123049396","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6123047
D. Gentsch, A. Klaska, Zhanwei Tu, Yurong Lv
ABB has over 10 years of experience in the use of embedded pole technology based on epoxy insulation in medium-voltage circuit breakers with vacuum interrupters. The next significant step in this technology is the development of embedded poles that use a thermoplastic material.
{"title":"Innovative thermoplastic pole design sets new reliability and environmental standards for vacuum breaker technology","authors":"D. Gentsch, A. Klaska, Zhanwei Tu, Yurong Lv","doi":"10.1109/ICEPE-ST.2011.6123047","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123047","url":null,"abstract":"ABB has over 10 years of experience in the use of embedded pole technology based on epoxy insulation in medium-voltage circuit breakers with vacuum interrupters. The next significant step in this technology is the development of embedded poles that use a thermoplastic material.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124558232","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 high power pulse source driving electromagnetic rail gun requires some characteristics of the core device switch, such as strong charge transfer ability and standing high peak pulse current. Meanwhile, when the total driving current is got by adding several pulse currents generated by different modules respectively, the source requires short jitter of switch. The test platform is built for studying static and dynamic characteristics of triggered vacuum switch (TVS). Under conditions that peak value of triggering pulse is 15 kV and gap distance is 1 mm, our experiment results show that: the average self-breakdown voltage is 15.2 kV, minimum operating voltage is 130 V, and the operating voltage range is from 0.7% to 90%. Meanwhile, the biggest discharging delay time is 400 ns and the jitter is 15.2 ns. We also have studied the switch in the high-power pulse source based on network topology, and our experiment results show that: the vacuum switch is able to stand 196 kA peak pulse current and transfer charge up to 194.8 C each time. It is suggested by our experiment results that: the switch has wide operating voltage scope and strong charge transfer ability, and could stand high peak current, furthermore the switches satisfy the requirement of the synchronization of multi-module.
{"title":"Experimental study of vacuum switch applied in pulse source system","authors":"Yingbiao Shao, X. Yao, Jingliang Chen, Xiaoqing Xu","doi":"10.1109/ICEPE-ST.2011.6122910","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122910","url":null,"abstract":"The high power pulse source driving electromagnetic rail gun requires some characteristics of the core device switch, such as strong charge transfer ability and standing high peak pulse current. Meanwhile, when the total driving current is got by adding several pulse currents generated by different modules respectively, the source requires short jitter of switch. The test platform is built for studying static and dynamic characteristics of triggered vacuum switch (TVS). Under conditions that peak value of triggering pulse is 15 kV and gap distance is 1 mm, our experiment results show that: the average self-breakdown voltage is 15.2 kV, minimum operating voltage is 130 V, and the operating voltage range is from 0.7% to 90%. Meanwhile, the biggest discharging delay time is 400 ns and the jitter is 15.2 ns. We also have studied the switch in the high-power pulse source based on network topology, and our experiment results show that: the vacuum switch is able to stand 196 kA peak pulse current and transfer charge up to 194.8 C each time. It is suggested by our experiment results that: the switch has wide operating voltage scope and strong charge transfer ability, and could stand high peak current, furthermore the switches satisfy the requirement of the synchronization of multi-module.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121370804","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6123020
K. Takao, Yasunori Tanaka, Kyungmin Sung, K. Wada, T. Shinohe, T. Kanai, H. Ohashi
High-frequency switching operations are required in medium-voltage power converters to realize compact power converter systems. High-voltage hybrid pair modules using SiC-PiN diodes and Si-IEGT are expected to increase the switching frequency. In this work, 4.5 kV–400 A SiC-PiN diode and Si-IEGT hybrid pair modules have been developed. Hard driving is applied to the hybrid pair module for low switching losses and stable series voltage balance between two series-connected modules. Operation tests of developed hybrid pair modules with the switching frequency of 4 kHz have been carried out in a 1 MVA class prototype power converter.
{"title":"High-power converters with high switching frequency operation using SiC-PiN diodes and Si-IEGTs","authors":"K. Takao, Yasunori Tanaka, Kyungmin Sung, K. Wada, T. Shinohe, T. Kanai, H. Ohashi","doi":"10.1109/ICEPE-ST.2011.6123020","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123020","url":null,"abstract":"High-frequency switching operations are required in medium-voltage power converters to realize compact power converter systems. High-voltage hybrid pair modules using SiC-PiN diodes and Si-IEGT are expected to increase the switching frequency. In this work, 4.5 kV–400 A SiC-PiN diode and Si-IEGT hybrid pair modules have been developed. Hard driving is applied to the hybrid pair module for low switching losses and stable series voltage balance between two series-connected modules. Operation tests of developed hybrid pair modules with the switching frequency of 4 kHz have been carried out in a 1 MVA class prototype power converter.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128668966","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6122978
Yan Wang, Xiaoshe Zhai, Zhengxiang Song, Yingsan Geng
The short circuit current in DC (Direct Current) supply system will rise to a risk value within a few milliseconds. The current limiter must detect this fault on microsecond level to restrict the amplitude of short circuit current more effectively. For the existing method, the shunt is always employed for such fault detection, where the time to detect the fault current is relative long and hard for the rapid detection. In this paper, a novel method based on the flexible Rogowski coil is proposed, where the differential signal and the integral signal of the Rogowski coil are combined to perform the relay protection function. The design method of the coil, the relative experiments and the simulation result of the relay protection system are all discussed in sequence. Firstly, the equivalent circuit of the Rogowski coil is established, in which the distributed parameters of the coil are calculated with the Finite Element Method. Secondly, the frequency response of the coil is calculated and validated experimentally. The parameters of the Rogowski coil can be adjusted and designed according to the simulation result. Finally, the simulation of the relay protection system is performed, which shows that the demand of short current protection in ship DC distribution system can be satisfied and the method proposed in this paper is verified.
{"title":"A new method to detect the short circuit current in DC supply system based on the flexible Rogowski coil","authors":"Yan Wang, Xiaoshe Zhai, Zhengxiang Song, Yingsan Geng","doi":"10.1109/ICEPE-ST.2011.6122978","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122978","url":null,"abstract":"The short circuit current in DC (Direct Current) supply system will rise to a risk value within a few milliseconds. The current limiter must detect this fault on microsecond level to restrict the amplitude of short circuit current more effectively. For the existing method, the shunt is always employed for such fault detection, where the time to detect the fault current is relative long and hard for the rapid detection. In this paper, a novel method based on the flexible Rogowski coil is proposed, where the differential signal and the integral signal of the Rogowski coil are combined to perform the relay protection function. The design method of the coil, the relative experiments and the simulation result of the relay protection system are all discussed in sequence. Firstly, the equivalent circuit of the Rogowski coil is established, in which the distributed parameters of the coil are calculated with the Finite Element Method. Secondly, the frequency response of the coil is calculated and validated experimentally. The parameters of the Rogowski coil can be adjusted and designed according to the simulation result. Finally, the simulation of the relay protection system is performed, which shows that the demand of short current protection in ship DC distribution system can be satisfied and the method proposed in this paper is verified.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129114432","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6122999
Mao Gangyuan, Wu Mei, Liu Huikang
Traditional magnetic crane in the actual operation due to the saturation of the electromagnet coil excitation is prone to produce excessive current and causes the waste of energy. In the demagnetization stage, Stored energy through the electromagnet coil braking resistance heat release, no feedback to the power grid, has also caused a lot of waste. Another electromagnet is a big inductive load. When DC contactors are connected or disconnected, inductance back electromotive force is very large, and very prone to generate arc light, and burn out DC contactor, so the failure rate is very high, and maintenance ia also a very heavy workload. For the traditional magnetic crane appears a variety of issues in the actual operation, we start this article with the magnetic circuit of magnetic lifting magnet, Which analyses and research the process of magnetic crane excitation and demagnetization further, and puts forward a multi-level variable constant current source magnetic-conditioning scheme. The scheme takes control of the exciting current, and makes the upfield of the magnetic Crane magnetize fast, demagnetization fast, less energy consumption, improve the steel loading speed, and improve the safety coefficient of magnetic crane by using the PLC programming and fully controlling bridge circuit.
{"title":"The application of multistage invariable permanent current source in magnetic force adjustment","authors":"Mao Gangyuan, Wu Mei, Liu Huikang","doi":"10.1109/ICEPE-ST.2011.6122999","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122999","url":null,"abstract":"Traditional magnetic crane in the actual operation due to the saturation of the electromagnet coil excitation is prone to produce excessive current and causes the waste of energy. In the demagnetization stage, Stored energy through the electromagnet coil braking resistance heat release, no feedback to the power grid, has also caused a lot of waste. Another electromagnet is a big inductive load. When DC contactors are connected or disconnected, inductance back electromotive force is very large, and very prone to generate arc light, and burn out DC contactor, so the failure rate is very high, and maintenance ia also a very heavy workload. For the traditional magnetic crane appears a variety of issues in the actual operation, we start this article with the magnetic circuit of magnetic lifting magnet, Which analyses and research the process of magnetic crane excitation and demagnetization further, and puts forward a multi-level variable constant current source magnetic-conditioning scheme. The scheme takes control of the exciting current, and makes the upfield of the magnetic Crane magnetize fast, demagnetization fast, less energy consumption, improve the steel loading speed, and improve the safety coefficient of magnetic crane by using the PLC programming and fully controlling bridge circuit.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116769387","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 : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6122987
Xin Lin, Chunyu Qiao, Yongxiang Li, Jianyuan Xu, L. Song
The structure and parameters of the motor used in the operating mechanism is designed according to the characteristics requirement of disconnecting switch. The two kinds of stator winding structures, one of which is stator winding symmetric distribution and the other one of which is stator winding asymmetric distribution, are proposed in the motor design. The dynamic simulation is achieved by using the finite element method according to the two kinds of stator winding structures. The simulation results verify the reasonable of motor design and gain the characteristic curves (torque, current, revolution and angle, etc.). The analysis results indicate that both of the two stator winding structures motor have an excellent performance which can give a sufficient opening or closing speed to meet the requirements of disconnecting switch.
{"title":"Simulation of the dynamic behavior on two stator winding structures of motor operating mechanism for high-voltage disconnecting switch","authors":"Xin Lin, Chunyu Qiao, Yongxiang Li, Jianyuan Xu, L. Song","doi":"10.1109/ICEPE-ST.2011.6122987","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122987","url":null,"abstract":"The structure and parameters of the motor used in the operating mechanism is designed according to the characteristics requirement of disconnecting switch. The two kinds of stator winding structures, one of which is stator winding symmetric distribution and the other one of which is stator winding asymmetric distribution, are proposed in the motor design. The dynamic simulation is achieved by using the finite element method according to the two kinds of stator winding structures. The simulation results verify the reasonable of motor design and gain the characteristic curves (torque, current, revolution and angle, etc.). The analysis results indicate that both of the two stator winding structures motor have an excellent performance which can give a sufficient opening or closing speed to meet the requirements of disconnecting switch.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116250394","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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