Pub Date : 2019-12-01DOI: 10.1109/jpets.2019.2944497
{"title":"2019 Index IEEE Power and Energy Technology Systems Journal Vol. 6","authors":"","doi":"10.1109/jpets.2019.2944497","DOIUrl":"https://doi.org/10.1109/jpets.2019.2944497","url":null,"abstract":"","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128395564","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 : 2019-12-01DOI: 10.1109/JPETS.2019.2933677
C. Fu, W. Si, Lingyu Zhu, Yongchun Liang, Honglei Li
This paper presents a heat transfer matrix and superposed thermal field-based method that can rapidly calculate steady state temperature rises in three-core cable groups laid in ducts. The temperature rise of any cable is a combination of self-reaction and interaction from other cables. A heat transfer matrix is formed by self-reaction coefficient and interaction transfer coefficient representing the thermal characteristics of the cable groups in ducts. The heat transfer matrix can be obtained by enough samples including temperature rise and cable losses based on numerical analysis, trial or commercial software. Rapid calculations can then be performed by simplify iteration of temperature-loss. Extraction of the transfer matrix using CYMCAP ampacity and temperature calculation software and application of the fast calculation method are illustrated and compared, confirming the feasibility and relative simplicity and accuracy of the fast calculation method.
{"title":"Rapid Transfer Matrix-Based Calculation of Steady-State Temperature Rises in Cable Ducts Containing Groups of Three Phase Cable","authors":"C. Fu, W. Si, Lingyu Zhu, Yongchun Liang, Honglei Li","doi":"10.1109/JPETS.2019.2933677","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2933677","url":null,"abstract":"This paper presents a heat transfer matrix and superposed thermal field-based method that can rapidly calculate steady state temperature rises in three-core cable groups laid in ducts. The temperature rise of any cable is a combination of self-reaction and interaction from other cables. A heat transfer matrix is formed by self-reaction coefficient and interaction transfer coefficient representing the thermal characteristics of the cable groups in ducts. The heat transfer matrix can be obtained by enough samples including temperature rise and cable losses based on numerical analysis, trial or commercial software. Rapid calculations can then be performed by simplify iteration of temperature-loss. Extraction of the transfer matrix using CYMCAP ampacity and temperature calculation software and application of the fast calculation method are illustrated and compared, confirming the feasibility and relative simplicity and accuracy of the fast calculation method.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115439618","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 : 2019-09-01DOI: 10.1109/JPETS.2019.2931396
Nasim Jabalameli, Xiangjing Su, A. Ghosh
The worldwide acceptance of plug-in electric vehicles (PEVs) is expected to tremendously grow in the next few years. Uncoordinated PEV charging can cause serious grid issues such as overloading of transformers and unacceptable voltage drops. Single-phase residential charging can also initiate or contribute to voltage unbalance in distribution networks. A potential solution for the PEV integration is shifting the charging activities from peak to valley periods. Therefore, this paper firstly investigates the impacts of uncoordinated single-phase PEV charging at residential houses on three-phase distribution networks. Then, it proposes a novel PEV charging coordination strategy based on heuristic genetic algorithm (GA) to perform online centralized charging considering transformer loading and bus voltage profiles. Based on this, a decentralized PEV reactive power discharging approach is presented where the reactive power is discharged at selected nodes for further reduction of voltage unbalance. The impacts of uncoordinated PEV charging as well as the performance of the proposed centralized PEV charging and decentralized var discharging strategies are tested on a real unbalanced Western Australian distribution network under the Perth Solar City project over 24 hours.
{"title":"Online Centralized Charging Coordination of PEVs With Decentralized Var Discharging for Mitigation of Voltage Unbalance","authors":"Nasim Jabalameli, Xiangjing Su, A. Ghosh","doi":"10.1109/JPETS.2019.2931396","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2931396","url":null,"abstract":"The worldwide acceptance of plug-in electric vehicles (PEVs) is expected to tremendously grow in the next few years. Uncoordinated PEV charging can cause serious grid issues such as overloading of transformers and unacceptable voltage drops. Single-phase residential charging can also initiate or contribute to voltage unbalance in distribution networks. A potential solution for the PEV integration is shifting the charging activities from peak to valley periods. Therefore, this paper firstly investigates the impacts of uncoordinated single-phase PEV charging at residential houses on three-phase distribution networks. Then, it proposes a novel PEV charging coordination strategy based on heuristic genetic algorithm (GA) to perform online centralized charging considering transformer loading and bus voltage profiles. Based on this, a decentralized PEV reactive power discharging approach is presented where the reactive power is discharged at selected nodes for further reduction of voltage unbalance. The impacts of uncoordinated PEV charging as well as the performance of the proposed centralized PEV charging and decentralized var discharging strategies are tested on a real unbalanced Western Australian distribution network under the Perth Solar City project over 24 hours.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862240","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 : 2019-08-19DOI: 10.1109/JPETS.2019.2935703
Juan Ospina, N. Gupta, Alvi Newaz, Mario Harper, M. Faruque, Emmanuel G. Collins, R. Meeker, Gwen Lofman
This paper proposes a novel control solution designed to solve the local and grid-connected distributed energy resources (DERs) management problem by developing a generalizable framework capable of controlling DERs based on forecasted values and real-time energy prices. The proposed model uses sampling-based model predictive control (SBMPC), together with the real-time price of energy and forecasts of PV and load power, to allocate the dispatch of the available distributed energy resources (DERs) while minimizing the overall cost. The strategy developed aims to find the ideal combination of solar, grid, and energy storage (ES) power with the objective of minimizing the total cost of energy of the entire system. Both offline and controller hardware-in-the-loop (CHIL) results are presented for a 7-day test case scenario and compared with two manual base test cases and four baseline optimization algorithms (Genetic Algorithm (GA), Particle Swarm Optimization (PSO), Quadratic Programming interior-point method (QP-IP), and Sequential Quadratic Programming (SQP)) designed to solve the optimization problem considering the current status of the system and also its future states. The proposed model uses a 24-hour prediction horizon with a 15-minute control horizon. The results demonstrate substantial cost and execution time savings when compared to the other baseline control algorithms.
{"title":"Sampling-Based Model Predictive Control of PV-Integrated Energy Storage System Considering Power Generation Forecast and Real-Time Price","authors":"Juan Ospina, N. Gupta, Alvi Newaz, Mario Harper, M. Faruque, Emmanuel G. Collins, R. Meeker, Gwen Lofman","doi":"10.1109/JPETS.2019.2935703","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2935703","url":null,"abstract":"This paper proposes a novel control solution designed to solve the local and grid-connected distributed energy resources (DERs) management problem by developing a generalizable framework capable of controlling DERs based on forecasted values and real-time energy prices. The proposed model uses sampling-based model predictive control (SBMPC), together with the real-time price of energy and forecasts of PV and load power, to allocate the dispatch of the available distributed energy resources (DERs) while minimizing the overall cost. The strategy developed aims to find the ideal combination of solar, grid, and energy storage (ES) power with the objective of minimizing the total cost of energy of the entire system. Both offline and controller hardware-in-the-loop (CHIL) results are presented for a 7-day test case scenario and compared with two manual base test cases and four baseline optimization algorithms (Genetic Algorithm (GA), Particle Swarm Optimization (PSO), Quadratic Programming interior-point method (QP-IP), and Sequential Quadratic Programming (SQP)) designed to solve the optimization problem considering the current status of the system and also its future states. The proposed model uses a 24-hour prediction horizon with a 15-minute control horizon. The results demonstrate substantial cost and execution time savings when compared to the other baseline control algorithms.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126066874","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 : 2019-08-08DOI: 10.1109/JPETS.2019.2933250
Tong Duan, Zhuoxuan Shen, V. Dinavahi
Nonlinear phenomena widely exist in AC/DC power systems, which should be accounted for accurately in real-time electromagnetic transient (EMT) simulation for obtaining precise results for hardware-in-the-loop applications. However, iterative solutions such as the Newton-Raphason method that can precisely obtain the results for highly nonlinear elements, are time consuming and computationally onerous. To fully utilize the time space and optimize hardware computation resources without loss of accuracy, this work proposes a novel multi-rate mixed-solver for AC/DC systems, wherein both iterative and non-iterative solvers with different time-steps are applied to the decomposed subsystems, and the linear solvers are reused within each time-step. The proposed solver and the complete real-time emulation system are implemented on FPGA-MPSoC platform. The real-time results are captured by the oscilloscope and verified with PSCAD/EMTDC and SaberRD for system-level and device-level performance evaluation.
{"title":"Multi-Rate Mixed-Solver for Real-Time Nonlinear Electromagnetic Transient Emulation of AC/DC Networks on FPGA-MPSoC Architecture","authors":"Tong Duan, Zhuoxuan Shen, V. Dinavahi","doi":"10.1109/JPETS.2019.2933250","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2933250","url":null,"abstract":"Nonlinear phenomena widely exist in AC/DC power systems, which should be accounted for accurately in real-time electromagnetic transient (EMT) simulation for obtaining precise results for hardware-in-the-loop applications. However, iterative solutions such as the Newton-Raphason method that can precisely obtain the results for highly nonlinear elements, are time consuming and computationally onerous. To fully utilize the time space and optimize hardware computation resources without loss of accuracy, this work proposes a novel multi-rate mixed-solver for AC/DC systems, wherein both iterative and non-iterative solvers with different time-steps are applied to the decomposed subsystems, and the linear solvers are reused within each time-step. The proposed solver and the complete real-time emulation system are implemented on FPGA-MPSoC platform. The real-time results are captured by the oscilloscope and verified with PSCAD/EMTDC and SaberRD for system-level and device-level performance evaluation.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129112564","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 : 2019-08-02DOI: 10.1109/JPETS.2019.2929952
Akanksha Singh, B. Mirafzal
The proposed three-phase boost Current Source Inverter (CSI) is equipped with Reverse-Blocking IGBTs (RB-IGBT) and the Phasor Pulse Width Modulation (PPWM) switching pattern to provide system efficiency greater than 92% and high boost ratios $(V_{LL}/V_{dc})$ up to 3.5 in a single stage. The boost CSI results in elimination of dc-dc boost converter or a step-up transformer needed in dc-ac converters operating with a dc input voltage lower than the output line-to-line voltage. In this paper, the relationship between the fundamental component of the inverter output current and the PPWM modulation index is derived and then confirmed by simulation and experimentally obtained data in both stand-alone and grid-tied modes of operation. In this work, a $2,,kW, 208,,V_{LLrms}, 60-120,,V_{dc}$ RB-IGBT-based boost CSI is prototyped to explore capabilities of the grid-tied boost CSI in terms of efficiency and THD for various input dc voltage and output power levels.
{"title":"An Efficient Grid-Connected Three-Phase Single-Stage Boost Current Source Inverter","authors":"Akanksha Singh, B. Mirafzal","doi":"10.1109/JPETS.2019.2929952","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2929952","url":null,"abstract":"The proposed three-phase boost Current Source Inverter (CSI) is equipped with Reverse-Blocking IGBTs (RB-IGBT) and the Phasor Pulse Width Modulation (PPWM) switching pattern to provide system efficiency greater than 92% and high boost ratios <inline-formula> <tex-math notation=\"LaTeX\">$(V_{LL}/V_{dc})$ </tex-math></inline-formula> up to 3.5 in a single stage. The boost CSI results in elimination of dc-dc boost converter or a step-up transformer needed in dc-ac converters operating with a dc input voltage lower than the output line-to-line voltage. In this paper, the relationship between the fundamental component of the inverter output current and the PPWM modulation index is derived and then confirmed by simulation and experimentally obtained data in both stand-alone and grid-tied modes of operation. In this work, a <inline-formula> <tex-math notation=\"LaTeX\">$2,,kW, 208,,V_{LLrms}, 60-120,,V_{dc}$ </tex-math></inline-formula> RB-IGBT-based boost CSI is prototyped to explore capabilities of the grid-tied boost CSI in terms of efficiency and THD for various input dc voltage and output power levels.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115699083","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 : 2019-07-19DOI: 10.1109/JPETS.2019.2929300
Sunaina Singh, S. Kewat, Bhim Singh, B. K. Panigrahi, M. Kushwaha
This paper presents a robust control strategy for a solar photovoltaic (PV)-based distributed generation system (DGS) with seamless transition capabilities from islanded to the grid-connected mode and vice versa. The proposed DGS consists of a solar PV array, a dc–dc boost converter, voltage source converter (VSC), and local nonlinear loads. In grid-connected mode, VSC regulates the dc-link voltage and the boost converter operates the solar PV array at the maximum power point. Moreover, the load reactive power compensation and harmonics elimination with unity power factor operation are achieved using the advanced robust shrinkage normalized sign (ARSNS)-based control algorithm. Therefore, the grid current distortion is maintained within the IEEE-519 standard and the IEEE-1547 standard. Under the grid fault condition, the proposed DGS operates in an islanded mode without any storage unit. The grid synchronization and resynchronization operations are executed through the intelligent synchronization control (SYC) algorithm with fast Fourier transform phase-locked loop (FFT-PLL). Test results demonstrate the system capabilities under the abnormal grid and unbalanced nonlinear load conditions.
{"title":"Seamless Control of Solar PV Grid Interfaced System With Islanding Operation","authors":"Sunaina Singh, S. Kewat, Bhim Singh, B. K. Panigrahi, M. Kushwaha","doi":"10.1109/JPETS.2019.2929300","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2929300","url":null,"abstract":"This paper presents a robust control strategy for a solar photovoltaic (PV)-based distributed generation system (DGS) with seamless transition capabilities from islanded to the grid-connected mode and vice versa. The proposed DGS consists of a solar PV array, a dc–dc boost converter, voltage source converter (VSC), and local nonlinear loads. In grid-connected mode, VSC regulates the dc-link voltage and the boost converter operates the solar PV array at the maximum power point. Moreover, the load reactive power compensation and harmonics elimination with unity power factor operation are achieved using the advanced robust shrinkage normalized sign (ARSNS)-based control algorithm. Therefore, the grid current distortion is maintained within the IEEE-519 standard and the IEEE-1547 standard. Under the grid fault condition, the proposed DGS operates in an islanded mode without any storage unit. The grid synchronization and resynchronization operations are executed through the intelligent synchronization control (SYC) algorithm with fast Fourier transform phase-locked loop (FFT-PLL). Test results demonstrate the system capabilities under the abnormal grid and unbalanced nonlinear load conditions.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114566845","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 : 2019-07-12DOI: 10.1109/JPETS.2019.2928013
U. Karaagac, J. Mahseredjian, Richard Gagnon, H. Gras, H. Saad, L. Cai, I. Kocar, A. Haddadi, E. Farantatos, Siqi Bu, K. Chan, L. Wang
Utilities are under considerable pressure to increase the share of wind energy resources in their generation fleet. With the increasing share of wind energy resources, the dynamic behavior of power systems will change considerably due to fundamental differences in technologies used for wind and conventional generators. There is a very little standardization in the ways to model wind turbines (WTs) and wind parks (WPs) in sharp contrast to conventional power plants. Hence, there is an international interest to deliver generic models (i.e. standardized and publicly available) for WTs and WPs that are able to capture all performance aspects as good as manufacturer-specific models. This paper presents an electromagnetic transient (EMT) simulation model for full-size converter (FSC) WT-based WPs that can be used for stability analysis and interconnection studies. The considered topology uses a permanent magnet synchronous generator. Although the collector grid and the FSC WTs are represented with their aggregated models, the overall control structure of the WP is preserved. FSC WT and WP control systems include the non-linearities, and necessary transient and protection functions to simulate the accurate transient behavior of WPs.
{"title":"A Generic EMT-Type Model for Wind Parks With Permanent Magnet Synchronous Generator Full Size Converter Wind Turbines","authors":"U. Karaagac, J. Mahseredjian, Richard Gagnon, H. Gras, H. Saad, L. Cai, I. Kocar, A. Haddadi, E. Farantatos, Siqi Bu, K. Chan, L. Wang","doi":"10.1109/JPETS.2019.2928013","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2928013","url":null,"abstract":"Utilities are under considerable pressure to increase the share of wind energy resources in their generation fleet. With the increasing share of wind energy resources, the dynamic behavior of power systems will change considerably due to fundamental differences in technologies used for wind and conventional generators. There is a very little standardization in the ways to model wind turbines (WTs) and wind parks (WPs) in sharp contrast to conventional power plants. Hence, there is an international interest to deliver generic models (i.e. standardized and publicly available) for WTs and WPs that are able to capture all performance aspects as good as manufacturer-specific models. This paper presents an electromagnetic transient (EMT) simulation model for full-size converter (FSC) WT-based WPs that can be used for stability analysis and interconnection studies. The considered topology uses a permanent magnet synchronous generator. Although the collector grid and the FSC WTs are represented with their aggregated models, the overall control structure of the WP is preserved. FSC WT and WP control systems include the non-linearities, and necessary transient and protection functions to simulate the accurate transient behavior of WPs.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133142465","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 : 2019-06-28DOI: 10.1109/JPETS.2019.2923970
M. Angle, S. Madnick, J. Kirtley, Shaharyar Khan
Physical control systems are increasingly controlled by reconfigurable, network-enabled devices to increase flexibility and ease commissioning and maintenance. Such capability creates vulnerabilities. Devices may be remotely reprogrammed by a malicious actor to act in unintended ways, causing physical damage to mechanical equipment, infrastructure, and life and limb. In this paper, past examples of actual damage to cyber-physical systems are shown, threats posed by software-controlled variable frequency drives (VFDs) are analyzed, and a small-scale version of an attack on ubiquitous VFD equipment is demonstrated.
{"title":"Identifying and Anticipating Cyberattacks That Could Cause Physical Damage to Industrial Control Systems","authors":"M. Angle, S. Madnick, J. Kirtley, Shaharyar Khan","doi":"10.1109/JPETS.2019.2923970","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2923970","url":null,"abstract":"Physical control systems are increasingly controlled by reconfigurable, network-enabled devices to increase flexibility and ease commissioning and maintenance. Such capability creates vulnerabilities. Devices may be remotely reprogrammed by a malicious actor to act in unintended ways, causing physical damage to mechanical equipment, infrastructure, and life and limb. In this paper, past examples of actual damage to cyber-physical systems are shown, threats posed by software-controlled variable frequency drives (VFDs) are analyzed, and a small-scale version of an attack on ubiquitous VFD equipment is demonstrated.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"60 20","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134225319","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 : 2019-06-01DOI: 10.1109/JPETS.2019.2913167
A. Hagnestål
Variable reluctance machines, such as transverse flux machines (TFMs), have very suitable properties for slow-speed renewable energy conversion applications such as wave power. The double-sided TFM variant with flux-concentrating magnet setup has generally better performance than other variants, but it is considerably more challenging to build. One of the most challenging parts to build for such machines is the magnet structure, especially for larger machines where the magnet structure is wide. In this paper, the magnet mounting problem of such a structure for a linear wave power generator has been analyzed. A mounting method has been proposed, and the mounting forces involved for that method have been calculated. A mounting tool has been designed and built, and it has been used to successfully build 12 magnet stacks for two linear-wave power generators that form a test setup. Through this work, it has been demonstrated that it is fully feasible to construct such magnet structures, and thereby, a reference to how this rather complex practical problem can be handled is provided for others in the field.
{"title":"Addressing the Magnet Mounting Problem for Double-Sided TFM Machines With Flux-Concentrating Setup","authors":"A. Hagnestål","doi":"10.1109/JPETS.2019.2913167","DOIUrl":"https://doi.org/10.1109/JPETS.2019.2913167","url":null,"abstract":"Variable reluctance machines, such as transverse flux machines (TFMs), have very suitable properties for slow-speed renewable energy conversion applications such as wave power. The double-sided TFM variant with flux-concentrating magnet setup has generally better performance than other variants, but it is considerably more challenging to build. One of the most challenging parts to build for such machines is the magnet structure, especially for larger machines where the magnet structure is wide. In this paper, the magnet mounting problem of such a structure for a linear wave power generator has been analyzed. A mounting method has been proposed, and the mounting forces involved for that method have been calculated. A mounting tool has been designed and built, and it has been used to successfully build 12 magnet stacks for two linear-wave power generators that form a test setup. Through this work, it has been demonstrated that it is fully feasible to construct such magnet structures, and thereby, a reference to how this rather complex practical problem can be handled is provided for others in the field.","PeriodicalId":170601,"journal":{"name":"IEEE Power and Energy Technology Systems Journal","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132610599","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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