Pub Date : 2011-10-01DOI: 10.1109/ICEPE-ST.2011.6123027
Yi Zhang, Guogang Zhang, Jie Wu, Weiguang Yuan, Yingsan Geng
With the rapid development of electrical industry, the traditional design method of circuit breakers can not meet the requirement. In this paper, in order to accelerate the design period of medium voltage circuit breakers and improve the overall performance of them, an intelligent design and simulation platform has been developed. The software consists of four main modules: Module of evaluation and prototype selection, parameterized modeling module, simulation module, optimization module and output module. The three-dimensional models of some medium voltage circuit breakers have been parameterized with Pro/Engineer software and a library of the product models has been built. In module of evaluation and prototype selection, in the basis of fuzzy evaluation algorithm, a required circuit breaker model is selected from the built library according to design requirement. In the parameterized modeling module, the 3D model of them can be modified and reused. In the simulation module, through developing interface software connecting with ANSYS and ADAMS, electrical simulation, magnetic simulation, stress simulation and kinematic simulation of the medium voltage circuit breakers can be done in background. In the optimization module, the overall optimization of circuit breakers is done using the typical optimization algorithm. By the methods of modular design, the reuse of product models and design knowledge has been realized in the software.
{"title":"Development of intelligent design and simulation platform for medium voltage circuit breakers","authors":"Yi Zhang, Guogang Zhang, Jie Wu, Weiguang Yuan, Yingsan Geng","doi":"10.1109/ICEPE-ST.2011.6123027","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123027","url":null,"abstract":"With the rapid development of electrical industry, the traditional design method of circuit breakers can not meet the requirement. In this paper, in order to accelerate the design period of medium voltage circuit breakers and improve the overall performance of them, an intelligent design and simulation platform has been developed. The software consists of four main modules: Module of evaluation and prototype selection, parameterized modeling module, simulation module, optimization module and output module. The three-dimensional models of some medium voltage circuit breakers have been parameterized with Pro/Engineer software and a library of the product models has been built. In module of evaluation and prototype selection, in the basis of fuzzy evaluation algorithm, a required circuit breaker model is selected from the built library according to design requirement. In the parameterized modeling module, the 3D model of them can be modified and reused. In the simulation module, through developing interface software connecting with ANSYS and ADAMS, electrical simulation, magnetic simulation, stress simulation and kinematic simulation of the medium voltage circuit breakers can be done in background. In the optimization module, the overall optimization of circuit breakers is done using the typical optimization algorithm. By the methods of modular design, the reuse of product models and design knowledge has been realized in the software.","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":"128483785","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.2011.6123050
Jiajuan Wu, Peng Wang
Singularity switch circuit is a kind of special circuits in electric circuit theory. In this circuit, singularity functions are useful as good approximations to the switching quantities with switching operations. At present, the dissipated energy in this circuit can be calculated directly by circuit's fundamental quantities but there is a limitation when using electric circuit theory to explain how and where this energy loss is. In this paper, another analyzing method of energy loss is introduced, based on the electromagnetic theory (EM theory) with the combination of gaseous electrical conductance knowledge and some measurable electric parameters. The result equals to that obtained through electric circuit theory. This reveals the way that energy disperses and promotes further combination between electric circuit theory and EM theory in the field of power electronics. At the end of this paper, simulating graphs about the distribution of EM field related to energy loss are given.
{"title":"Research on energy loss in idealistic singularity switch circuit with contacts","authors":"Jiajuan Wu, Peng Wang","doi":"10.1109/ICEPE-ST.2011.6123050","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123050","url":null,"abstract":"Singularity switch circuit is a kind of special circuits in electric circuit theory. In this circuit, singularity functions are useful as good approximations to the switching quantities with switching operations. At present, the dissipated energy in this circuit can be calculated directly by circuit's fundamental quantities but there is a limitation when using electric circuit theory to explain how and where this energy loss is. In this paper, another analyzing method of energy loss is introduced, based on the electromagnetic theory (EM theory) with the combination of gaseous electrical conductance knowledge and some measurable electric parameters. The result equals to that obtained through electric circuit theory. This reveals the way that energy disperses and promotes further combination between electric circuit theory and EM theory in the field of power electronics. At the end of this paper, simulating graphs about the distribution of EM field related to energy loss are given.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"91 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":"116029393","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.2011.6123162
Hui Lichuan, Chen Zhonghua, G. Fengyi
As in Catenary-Pantograph system, the amount of wear caused by the sliding contact is affected by the contact force. When the load is smaller, there will be erosion resistance wear; at the other hands, there will be mechanism wear when the load is bigger. So some experiments using carbon sliding panel infiltrated with copper have been taken to find the relationship between the load and wear. In these experiments, there were a lot of data at the condition of different values of current and velocity. And then the data will be trained using the Bp neural-network method, whose input is the load and output is the wear data. Also black-box model should be validated using the other data. Base on this, an optimize arithmetic will be designed on the black-box model to find the best value of the load, and that will make the wear minimal.
{"title":"Study of the load on best value based on the minimum wear in sliding electric contact system","authors":"Hui Lichuan, Chen Zhonghua, G. Fengyi","doi":"10.1109/ICEPE-ST.2011.6123162","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123162","url":null,"abstract":"As in Catenary-Pantograph system, the amount of wear caused by the sliding contact is affected by the contact force. When the load is smaller, there will be erosion resistance wear; at the other hands, there will be mechanism wear when the load is bigger. So some experiments using carbon sliding panel infiltrated with copper have been taken to find the relationship between the load and wear. In these experiments, there were a lot of data at the condition of different values of current and velocity. And then the data will be trained using the Bp neural-network method, whose input is the load and output is the wear data. Also black-box model should be validated using the other data. Base on this, an optimize arithmetic will be designed on the black-box model to find the best value of the load, and that will make the wear minimal.","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":"122442417","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.2011.6123043
Peng Sun, R. Xie
The three dimensional magnetohydro dynamic (MHD) model of vacuum arc was obtained based on two-fluid model of ion and electron and Maxwell equation. In the MHD model, mass conservation equation, momentum conservation equations, energy conservation equations of ion and electron, voltage equations and magnetic equations were considered. Characteristics of large-current vacuum arc were simulated and analyzed through computing fluid dynamic(CFD) software FLUENT and Re-developmented visual c++. And the formation mechanism of the following plasma parameters distribution, such as plasma density, axial current density, plasma velocity, Mach number, ion temperature, electron temperature, ion pressure, plasma pressure was analyzed. The simulation results shown that the maximal plasma pressure and plasma density of vacuum arc appears near the cathode side, but the minimum plasma velocity and Mach number of vacuum arc appears there.
{"title":"Numerical simulation of large-current vacuum arc plasma","authors":"Peng Sun, R. Xie","doi":"10.1109/ICEPE-ST.2011.6123043","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123043","url":null,"abstract":"The three dimensional magnetohydro dynamic (MHD) model of vacuum arc was obtained based on two-fluid model of ion and electron and Maxwell equation. In the MHD model, mass conservation equation, momentum conservation equations, energy conservation equations of ion and electron, voltage equations and magnetic equations were considered. Characteristics of large-current vacuum arc were simulated and analyzed through computing fluid dynamic(CFD) software FLUENT and Re-developmented visual c++. And the formation mechanism of the following plasma parameters distribution, such as plasma density, axial current density, plasma velocity, Mach number, ion temperature, electron temperature, ion pressure, plasma pressure was analyzed. The simulation results shown that the maximal plasma pressure and plasma density of vacuum arc appears near the cathode side, but the minimum plasma velocity and Mach number of vacuum arc appears there.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"14 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":"121375029","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.2011.6122913
Yao Wang, Kui Li, Can Liu, Zhitao Guo, F. Niu, Xiujuan Zhang
AC/DC sensitive residual current transformer (AC/DC RCT) is used to detect residual sinusoidal alternating currents, residual pulsating direct currents or residual smooth direct currents and the characteristics of AC/DC RCT is of great signification for residual current protection under complicated waveform conditions. An AC/DC RCT based on magnetic modulation principle is proposed. Modeling and simulation of the AC/DC RCT is studied. Firstly, the B-H curve of permalloy magnetic core is fitted accurately by using a mixed method of expressions and the least squares method (LSM), which can overcome the shortage of low accuracy of the traditional charting or piecewise approximation methods. Secondly, based on the analysis of operation principle of AC/DC RCT, the loop equation of AC/DC RCT is obtained and a computer based simulation model is established. Thirdly, on the basis of the simulation model, the effects of secondary winding turns on oscillation frequency of AC/DC RCT is studied when the material and geometric dimension of the magnetic core is defined. And the simulation results of output voltage under residual sinusoidal alternating currents or residual smooth direct currents conditions are given. Finally, the feasibility of the simulation model is verified by experiment. The research results are helpful for the design of AC/DC RCT.
{"title":"Study on modeling and simulation of AC/DC sensitive residual current transformer","authors":"Yao Wang, Kui Li, Can Liu, Zhitao Guo, F. Niu, Xiujuan Zhang","doi":"10.1109/ICEPE-ST.2011.6122913","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6122913","url":null,"abstract":"AC/DC sensitive residual current transformer (AC/DC RCT) is used to detect residual sinusoidal alternating currents, residual pulsating direct currents or residual smooth direct currents and the characteristics of AC/DC RCT is of great signification for residual current protection under complicated waveform conditions. An AC/DC RCT based on magnetic modulation principle is proposed. Modeling and simulation of the AC/DC RCT is studied. Firstly, the B-H curve of permalloy magnetic core is fitted accurately by using a mixed method of expressions and the least squares method (LSM), which can overcome the shortage of low accuracy of the traditional charting or piecewise approximation methods. Secondly, based on the analysis of operation principle of AC/DC RCT, the loop equation of AC/DC RCT is obtained and a computer based simulation model is established. Thirdly, on the basis of the simulation model, the effects of secondary winding turns on oscillation frequency of AC/DC RCT is studied when the material and geometric dimension of the magnetic core is defined. And the simulation results of output voltage under residual sinusoidal alternating currents or residual smooth direct currents conditions are given. Finally, the feasibility of the simulation model is verified by experiment. The research results are helpful for the design of AC/DC RCT.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"125 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":"127222106","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.2011.6122977
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.2011.6123001
H. Anji, Y. Sato, D. Saruhashi, S. Yanabu, T. Akasu, N. Takao
The fault current for large-scale power systems is higher than normal and interception using a current breaker can thus be difficult. To address this problem, power system reorganization and circuit breaker upgrades can be considered. However, existing systems could be operated by introducing a superconducting fault current limiter. We conducted research on a simple structure comprising YBCO superconducting thin films with a focus on S/N transition-type fault current limiters. Such devices could facilitate stable operation of large-scale electricity systems. In this study, we investigated the opening speed of the vacuum interrupter and the recovery time of the superconducting element.
{"title":"Realization study of superconducting fault current limiter","authors":"H. Anji, Y. Sato, D. Saruhashi, S. Yanabu, T. Akasu, N. Takao","doi":"10.1109/ICEPE-ST.2011.6123001","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123001","url":null,"abstract":"The fault current for large-scale power systems is higher than normal and interception using a current breaker can thus be difficult. To address this problem, power system reorganization and circuit breaker upgrades can be considered. However, existing systems could be operated by introducing a superconducting fault current limiter. We conducted research on a simple structure comprising YBCO superconducting thin films with a focus on S/N transition-type fault current limiters. Such devices could facilitate stable operation of large-scale electricity systems. In this study, we investigated the opening speed of the vacuum interrupter and the recovery time of the superconducting element.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"51 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":"133664838","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.2011.6123061
Laijun Zhao, Zhenbiao Li, Youwu Zhou
The objective of this paper is to investigate vacuum arc erosion characteristics of a nanocrystalline CuCr (Cr 50 wt%) contact material. The vacuum contact simulation device was used to conduct contact materials arc erosion tests, and voltage waveforms of make and break arcs between the electrodes were recorded with LabVIEW. Using electricity-ray analytical balance and scanning electron microscopy, the mass loss and the surface structure of CuCr contact materials were obtained. Experiments indicate that the average break arc duration and the cathode contact mass loss of nanocrystalline CuCr50 material were higher than those of two microcrystalline CuCr50 materials. The eroded contact surface structure showed a clear difference: the cathode contact surface of nanocrystalline CuCr50 contact material was uniform, while each cathode contact surface of two microcrystalline CuCr50 materials had an obvious arc erosion pit.
{"title":"Arc erosion characteristics of nanocrystalline CuCr contact material","authors":"Laijun Zhao, Zhenbiao Li, Youwu Zhou","doi":"10.1109/ICEPE-ST.2011.6123061","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123061","url":null,"abstract":"The objective of this paper is to investigate vacuum arc erosion characteristics of a nanocrystalline CuCr (Cr 50 wt%) contact material. The vacuum contact simulation device was used to conduct contact materials arc erosion tests, and voltage waveforms of make and break arcs between the electrodes were recorded with LabVIEW. Using electricity-ray analytical balance and scanning electron microscopy, the mass loss and the surface structure of CuCr contact materials were obtained. Experiments indicate that the average break arc duration and the cathode contact mass loss of nanocrystalline CuCr50 material were higher than those of two microcrystalline CuCr50 materials. The eroded contact surface structure showed a clear difference: the cathode contact surface of nanocrystalline CuCr50 contact material was uniform, while each cathode contact surface of two microcrystalline CuCr50 materials had an obvious arc erosion pit.","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":"128187662","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.2011.6123024
Zhenjun Ma
The electronic control circuit of each thyristor control unit (TCU) in thyristor valves for Three Gorges-Shanghai HVDC Power Transmission Project can not only control and detect the thyristor level, but also has the function of both normal protective firing (PF) and recovery protective firing (RP). Some problems on circuit design of recovery protective firing are discussed here.
{"title":"Some points on protective firing for HVDC thyristor value","authors":"Zhenjun Ma","doi":"10.1109/ICEPE-ST.2011.6123024","DOIUrl":"https://doi.org/10.1109/ICEPE-ST.2011.6123024","url":null,"abstract":"The electronic control circuit of each thyristor control unit (TCU) in thyristor valves for Three Gorges-Shanghai HVDC Power Transmission Project can not only control and detect the thyristor level, but also has the function of both normal protective firing (PF) and recovery protective firing (RP). Some problems on circuit design of recovery protective firing are discussed here.","PeriodicalId":379448,"journal":{"name":"2011 1st International Conference on Electric Power Equipment - Switching Technology","volume":"36 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":"131664982","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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