Pub Date : 2024-06-28DOI: 10.1109/JESTIE.2024.3420790
Ishita Biswas;Debaprasad Kastha;Prabodh Bajpai
In this article, a high gain bidirectional switched capacitor dc–dc converter topology with common ground, is proposed for storage integration in dc microgrids. Unlike similar reported high gain topologies, the proposed topology provides a fixed rms ac voltage across two of its switch nodes, which allows it to be connected at an ac port of a partially isolated multiport converter. It also offers one third of the high side voltage stress across all the capacitors and power devices and automatic input current balancing function. Ability to handle wide source voltage variation and smooth low voltage side input current make this topology suitable for storage integration with lower inductor and switch current stress. Zero voltage switching during bidirectional modes of operation ensures low switching loss. These features of the proposed topology remain even when the converter is integrated at an ac port of partially isolated multiport converter. A 500-W laboratory prototype is developed to verify the wide input voltage (20–50 V) operation, while producing regulated dc output voltage of 220 V. The proposed converter achieves maximum efficiencies of 97.32% and 96.41% during its boost and buck modes of operation, respectively, which are among the highest reported in the literature.
{"title":"A High Gain Switched Capacitor DC–DC Converter Suitable for Integration With Partially Isolated Multiport Converters","authors":"Ishita Biswas;Debaprasad Kastha;Prabodh Bajpai","doi":"10.1109/JESTIE.2024.3420790","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3420790","url":null,"abstract":"In this article, a high gain bidirectional switched capacitor dc–dc converter topology with common ground, is proposed for storage integration in dc microgrids. Unlike similar reported high gain topologies, the proposed topology provides a fixed rms ac voltage across two of its switch nodes, which allows it to be connected at an ac port of a partially isolated multiport converter. It also offers one third of the high side voltage stress across all the capacitors and power devices and automatic input current balancing function. Ability to handle wide source voltage variation and smooth low voltage side input current make this topology suitable for storage integration with lower inductor and switch current stress. Zero voltage switching during bidirectional modes of operation ensures low switching loss. These features of the proposed topology remain even when the converter is integrated at an ac port of partially isolated multiport converter. A 500-W laboratory prototype is developed to verify the wide input voltage (20–50 V) operation, while producing regulated dc output voltage of 220 V. The proposed converter achieves maximum efficiencies of 97.32% and 96.41% during its boost and buck modes of operation, respectively, which are among the highest reported in the literature.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"5 4","pages":"1676-1687"},"PeriodicalIF":0.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434600","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}
This article thoroughly investigates the relationship between the lateral misalignment and the receiver coil current in the dynamic wireless power transfer (DWPT) system. Based on this analysis, a control configuration is proposed to automatically reduce the lateral misalignment between the transmitter and receiver coils, thereby enhancing the DWPT efficiency. The control configuration includes a lateral position estimator, which utilizes the fusion of the inertial measurement unit and the current sensor. This algorithm enables estimating the lateral misalignment of the vehicle at the same rate as the motor drives. Furthermore, the lateral misalignment is controlled by the front steering mechanism. The proposed method has been successfully evaluated using a DWPT system and an electric vehicle developed by our research group. The test results show that the energy transmission efficiency was expected to be increased by 6.6 % in comparison with the human driving at the second transmitter coil.
{"title":"Receiving Side Current-Based Lateral Misalignment Estimation and Automated Steering Control for Dynamic Wireless Power Transfer","authors":"Tomoaki Koishi;Binh-Minh Nguyen;Osamu Shimizu;Hiroshi Fujimoto","doi":"10.1109/JESTIE.2024.3419252","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3419252","url":null,"abstract":"This article thoroughly investigates the relationship between the lateral misalignment and the receiver coil current in the dynamic wireless power transfer (DWPT) system. Based on this analysis, a control configuration is proposed to automatically reduce the lateral misalignment between the transmitter and receiver coils, thereby enhancing the DWPT efficiency. The control configuration includes a lateral position estimator, which utilizes the fusion of the inertial measurement unit and the current sensor. This algorithm enables estimating the lateral misalignment of the vehicle at the same rate as the motor drives. Furthermore, the lateral misalignment is controlled by the front steering mechanism. The proposed method has been successfully evaluated using a DWPT system and an electric vehicle developed by our research group. The test results show that the energy transmission efficiency was expected to be increased by 6.6 % in comparison with the human driving at the second transmitter coil.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"6 1","pages":"41-52"},"PeriodicalIF":0.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905902","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 : 2024-06-21DOI: 10.1109/JESTIE.2024.3417375
Xue Wang;Shubo Wang
In this article, a novel composite sliding-mode control (NCSMC) scheme is proposed for the servo system with disturbances. First, the funnel control is provided to constrain the output state, which can construct the system with some original system properties. Second, a fixed-time integral terminal sliding-mode surface is developed to shorten the tracking error convergence speed. A super-twisting nonlinear extended-state observer is designed to estimate the load disturbances. Then, the robust integral of the sign of the error is incorporated into the observer design, which provides the feedforward compensation to improve the system robustness. The proposed control scheme can achieve efficient speed tracking and disturbance suppression. The stability analysis of the closed-loop system is rigorously given by the Lyapunov stability theory. The real-time experiments have been carried out on a permanent magnet synchronous motor platform to show the effectiveness of the proposed control approach.
{"title":"Fixed-Time Integral Terminal Sliding-Mode Control With Super-Twisting Nonlinear Extended-State Observer for Servo System With Disturbances","authors":"Xue Wang;Shubo Wang","doi":"10.1109/JESTIE.2024.3417375","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3417375","url":null,"abstract":"In this article, a novel composite sliding-mode control (NCSMC) scheme is proposed for the servo system with disturbances. First, the funnel control is provided to constrain the output state, which can construct the system with some original system properties. Second, a fixed-time integral terminal sliding-mode surface is developed to shorten the tracking error convergence speed. A super-twisting nonlinear extended-state observer is designed to estimate the load disturbances. Then, the robust integral of the sign of the error is incorporated into the observer design, which provides the feedforward compensation to improve the system robustness. The proposed control scheme can achieve efficient speed tracking and disturbance suppression. The stability analysis of the closed-loop system is rigorously given by the Lyapunov stability theory. The real-time experiments have been carried out on a permanent magnet synchronous motor platform to show the effectiveness of the proposed control approach.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"6 1","pages":"435-446"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905792","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 : 2024-06-21DOI: 10.1109/JESTIE.2024.3417244
Songyan Niu;Qingyu Zhao;Shuangxia Niu;Linni Jian
As wireless electric vehicle charging (WEVC) technology moves toward commercialization, understanding its associated risks is crucial, particularly with the trend toward high-power fast charging. In this article, thermal risks and factors exacerbating the risks in wireless electric vehicle chargers are investigated comprehensively, focusing on the magnetic coupler and foreign objects (FOs) intruding on the charging area. The power losses and temperatures of the coupler and FOs are obtained using a two-way electromagnetic–thermal coupled model, and the coupler will be assigned to a risk level according to the proposed four-temperature-level risk evaluation mechanism. In this model, practical considerations include coil types, misalignments, FO materials, ambient temperatures, etc. Moreover, a dynamic perspective is used to characterize the trend of risks so as to provide predictive insights. To validate the newly identified risks, two 6.6-kW WEVC prototypes are built employing circular coils and DD coils, respectively. The experimental studies confirm the necessity of implementing thermal risk management strategies for magnetic coupler under misaligned conditions, such as enhanced cooling, including a wider range of materials for foreign object detection (FOD), expanding the FOD area, and so forth.
随着无线电动汽车充电（WEVC）技术走向商业化，了解其相关风险至关重要，尤其是在大功率快速充电的趋势下。本文全面研究了无线电动汽车充电器的热风险和加剧风险的因素，重点是磁耦合器和侵入充电区域的异物（FOs）。利用双向电磁-热耦合模型获得了耦合器和异物的功率损耗和温度，并根据提出的四级温度风险评估机制将耦合器分配到一个风险等级。在该模型中，实际考虑因素包括线圈类型、错位、FO 材料、环境温度等。此外，还采用了动态视角来描述风险趋势，从而提供预测性见解。为了验证新发现的风险，我们分别采用圆形线圈和 DD 线圈制造了两个 6.6 千瓦的 WEVC 原型。实验研究证实，有必要对错位条件下的磁耦合器实施热风险管理策略，如加强冷却、采用更广泛的异物检测（FOD）材料、扩大 FOD 面积等。
{"title":"A Comprehensive Investigation of Thermal Risks in Wireless EV Chargers Considering Spatial Misalignment From a Dynamic Perspective","authors":"Songyan Niu;Qingyu Zhao;Shuangxia Niu;Linni Jian","doi":"10.1109/JESTIE.2024.3417244","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3417244","url":null,"abstract":"As wireless electric vehicle charging (WEVC) technology moves toward commercialization, understanding its associated risks is crucial, particularly with the trend toward high-power fast charging. In this article, thermal risks and factors exacerbating the risks in wireless electric vehicle chargers are investigated comprehensively, focusing on the magnetic coupler and foreign objects (FOs) intruding on the charging area. The power losses and temperatures of the coupler and FOs are obtained using a two-way electromagnetic–thermal coupled model, and the coupler will be assigned to a risk level according to the proposed four-temperature-level risk evaluation mechanism. In this model, practical considerations include coil types, misalignments, FO materials, ambient temperatures, etc. Moreover, a dynamic perspective is used to characterize the trend of risks so as to provide predictive insights. To validate the newly identified risks, two 6.6-kW WEVC prototypes are built employing circular coils and DD coils, respectively. The experimental studies confirm the necessity of implementing thermal risk management strategies for magnetic coupler under misaligned conditions, such as enhanced cooling, including a wider range of materials for foreign object detection (FOD), expanding the FOD area, and so forth.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"5 4","pages":"1560-1571"},"PeriodicalIF":0.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438637","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}
Aggregated modeling of converter-interfaced resources (CIRs) can decrease the computational complexity in time-domain simulations of electric grids with high penetration of renewable sources. This article presents admittance-based aggregated modeling (ABAM) for grid-following CIRs. The aggregation is carried out by representing the CIRs’ current controllers and output filters using transfer functions and aggregating them as admittances and sources. For improved aggregation accuracy, the CIRs are grouped in terms of their ratings, synchronization system parameters, and collector system parameters. The numerical advancements of the proposed ABAM are shown in an example renewable energy system consisting of multiple grid-following CIRs. It is verified that the ABAM has low sensitivity to the parameters and excellent accuracy in capturing the dynamics of heterogeneous CIRs compared to the conventional preserved-structure aggregated model with weighted-mean parameters. The proposed ABAM also permits the use of large time-step sizes with acceptable numerical accuracy in (offline) MATLAB/Simulink and (real-time) OPAL-RT simulators.
{"title":"Admittance-Based Aggregated Modeling of Converter-Interfaced Resources With Heterogeneous Parameters for Transient Analysis of Multiconverter Systems","authors":"Arash Safavizadeh;Taleb Vahabzadeh;Seyyedmilad Ebrahimi;Juri Jatskevich","doi":"10.1109/JESTIE.2024.3416241","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3416241","url":null,"abstract":"Aggregated modeling of converter-interfaced resources (CIRs) can decrease the computational complexity in time-domain simulations of electric grids with high penetration of renewable sources. This article presents admittance-based aggregated modeling (ABAM) for grid-following CIRs. The aggregation is carried out by representing the CIRs’ current controllers and output filters using transfer functions and aggregating them as admittances and sources. For improved aggregation accuracy, the CIRs are grouped in terms of their ratings, synchronization system parameters, and collector system parameters. The numerical advancements of the proposed ABAM are shown in an example renewable energy system consisting of multiple grid-following CIRs. It is verified that the ABAM has low sensitivity to the parameters and excellent accuracy in capturing the dynamics of heterogeneous CIRs compared to the conventional preserved-structure aggregated model with weighted-mean parameters. The proposed ABAM also permits the use of large time-step sizes with acceptable numerical accuracy in (offline) MATLAB/Simulink and (real-time) OPAL-RT simulators.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"6 1","pages":"295-307"},"PeriodicalIF":0.0,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905798","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 : 2024-06-17DOI: 10.1109/JESTIE.2024.3411611
Zhan Liu;Ziyang Xu;Yifan Wang;Ming Liu
High frequency magnetic field has been confirmed to have significant influence on insects and plants, which provides the possibility for future pesticide-free agriculture applications. However, existing magnetic field generation (MFG) devices are bulky, inefficient, and heavily placement-restricted, which are not suitable for agricultural environments. In this article, one novel cascaded inductive coupling based MFG system is proposed, which can generate large-scale magnetic field between cascaded coupled coils with very low-power consumption and space occupation. Moreover, constant currents can be achieved in multiple transmitting modules to ensure the identical magnetic fields by using the proposed approach when considering the features of MFG application, i.e., the no-load terminal and all power consumed on the coils and other parasitics. To validate the proposed MFG system and its design, the MHz prototyping systems with 8 coils, 12 coils, and 16 coils, are fabricated for testing and compared to the conventional design for inductive power transfer (IPT) systems. The experimental results demonstrate the effectiveness of the proposed approach. In the proposed MFG system with 16 coils (8 modules), the transmitter (TX) currents of all the modules can keep the same while the TX current variation is 40% higher in the conventional design for IPT system.
{"title":"A Large-Scale Magnetic Field Generation System for Pesticide-Free Agriculture Based on Cascaded Inductive Coupling","authors":"Zhan Liu;Ziyang Xu;Yifan Wang;Ming Liu","doi":"10.1109/JESTIE.2024.3411611","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3411611","url":null,"abstract":"High frequency magnetic field has been confirmed to have significant influence on insects and plants, which provides the possibility for future pesticide-free agriculture applications. However, existing magnetic field generation (MFG) devices are bulky, inefficient, and heavily placement-restricted, which are not suitable for agricultural environments. In this article, one novel cascaded inductive coupling based MFG system is proposed, which can generate large-scale magnetic field between cascaded coupled coils with very low-power consumption and space occupation. Moreover, constant currents can be achieved in multiple transmitting modules to ensure the identical magnetic fields by using the proposed approach when considering the features of MFG application, i.e., the no-load terminal and all power consumed on the coils and other parasitics. To validate the proposed MFG system and its design, the MHz prototyping systems with 8 coils, 12 coils, and 16 coils, are fabricated for testing and compared to the conventional design for inductive power transfer (IPT) systems. The experimental results demonstrate the effectiveness of the proposed approach. In the proposed MFG system with 16 coils (8 modules), the transmitter (TX) currents of all the modules can keep the same while the TX current variation is 40% higher in the conventional design for IPT system.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"6 1","pages":"62-71"},"PeriodicalIF":0.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905904","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 : 2024-06-05DOI: 10.1109/JESTIE.2024.3408317
Lining Zhang;Lihua Tang;Liu Liu;Shanyu Zhao;Muxuan Guo;Kean Aw;Aiguo Patrick Hu
Ultrasonic power transfer (UPT) is a promising wireless power transfer technique with great development potential. Establishing an accurate model that describes the transmission process of the system is crucial for designing an UPT system. When the thickness of the piezoelectric transducer cannot be neglected compared to its diameter, considering vibrations in both thickness and radial directions can improve the model accuracy. Moreover, losses in the system during transmission was overlooked in the existing two-dimensional equivalent circuit model. In addition, slight radial misalignment in a practical UPT system can affect the transmission performance. In this article, we propose a 2-D equivalent circuit model of UPT systems that takes into account both losses and radial misalignment for cylindrical piezoelectric transducers, which is derived based on a two-port network and validated by comparing the system input impedance, input power, output power, and efficiency from the model and experiment. The results demonstrate that without radial misalignment of piezoelectric transducers, the proposed equivalent circuit model improved the accuracy significantly as compared with the existing 1-D and 2-D models. The derivation and incorporation of the radial misalignment matrix in the model also shows an accurate representation of the system and the consistent results from the proposed model and experiment are obtained showing the same trend of system performance with varying radial misalignment. The developed equivalent circuit model lays the foundation for accurate analysis, design, control, and optimization of UPT systems.
{"title":"A 2-D Equivalent Circuit Model of Ultrasonic Power Transfer Systems Considering Losses and Transducer Misalignment","authors":"Lining Zhang;Lihua Tang;Liu Liu;Shanyu Zhao;Muxuan Guo;Kean Aw;Aiguo Patrick Hu","doi":"10.1109/JESTIE.2024.3408317","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3408317","url":null,"abstract":"Ultrasonic power transfer (UPT) is a promising wireless power transfer technique with great development potential. Establishing an accurate model that describes the transmission process of the system is crucial for designing an UPT system. When the thickness of the piezoelectric transducer cannot be neglected compared to its diameter, considering vibrations in both thickness and radial directions can improve the model accuracy. Moreover, losses in the system during transmission was overlooked in the existing two-dimensional equivalent circuit model. In addition, slight radial misalignment in a practical UPT system can affect the transmission performance. In this article, we propose a 2-D equivalent circuit model of UPT systems that takes into account both losses and radial misalignment for cylindrical piezoelectric transducers, which is derived based on a two-port network and validated by comparing the system input impedance, input power, output power, and efficiency from the model and experiment. The results demonstrate that without radial misalignment of piezoelectric transducers, the proposed equivalent circuit model improved the accuracy significantly as compared with the existing 1-D and 2-D models. The derivation and incorporation of the radial misalignment matrix in the model also shows an accurate representation of the system and the consistent results from the proposed model and experiment are obtained showing the same trend of system performance with varying radial misalignment. The developed equivalent circuit model lays the foundation for accurate analysis, design, control, and optimization of UPT systems.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"6 1","pages":"30-40"},"PeriodicalIF":0.0,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905759","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 : 2024-04-29DOI: 10.1109/JESTIE.2024.3394478
Ying Zhu;Zhili Wang;Bin Li
For integrating large-scale offshore wind farm system more effectively, issues as insufficient inertia energy and dc voltage variation caused by traditional grid-forming (GFM) control in voltage source converter based HVDC (VSC-HVDC) have to be settled urgently. This article proposes an improved coordinated GFM control strategy based on hybrid energy to improve grid frequency and dc voltage stability. In terms of grid-side VSC control, an improved virtual inertia control method consisting of additional capacitor structure and matching GFM control is proposed, which can decouple dc voltage and energy of dc capacitor in VSC-HVDC. By establishing coupling relationship between additional capacitor energy and grid frequency, the matching GFM control can fully utilize its energy and provide better inertia support. In terms of wind farm control, a three-stage coordinated control based on hybrid energy is designed. During stage1 and stage2, fast inertial support and primary frequency regulation are achieved through rotor kinetic energy. The supercapacitor is controlled to quickly increase or decrease active power to suppress sudden output power change caused by exiting rotor kinetic energy control in stage3. Finally, a comparative simulation is performed using MATLAB/Simulink to verify the effectiveness and advantages of the proposed strategy.
{"title":"Coordinated Grid-Forming Control Strategy for VSC-HVDC Integrating Offshore Wind Farms Based on Hybrid Energy","authors":"Ying Zhu;Zhili Wang;Bin Li","doi":"10.1109/JESTIE.2024.3394478","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3394478","url":null,"abstract":"For integrating large-scale offshore wind farm system more effectively, issues as insufficient inertia energy and dc voltage variation caused by traditional grid-forming (GFM) control in voltage source converter based HVDC (VSC-HVDC) have to be settled urgently. This article proposes an improved coordinated GFM control strategy based on hybrid energy to improve grid frequency and dc voltage stability. In terms of grid-side VSC control, an improved virtual inertia control method consisting of additional capacitor structure and matching GFM control is proposed, which can decouple dc voltage and energy of dc capacitor in VSC-HVDC. By establishing coupling relationship between additional capacitor energy and grid frequency, the matching GFM control can fully utilize its energy and provide better inertia support. In terms of wind farm control, a three-stage coordinated control based on hybrid energy is designed. During stage1 and stage2, fast inertial support and primary frequency regulation are achieved through rotor kinetic energy. The supercapacitor is controlled to quickly increase or decrease active power to suppress sudden output power change caused by exiting rotor kinetic energy control in stage3. Finally, a comparative simulation is performed using MATLAB/Simulink to verify the effectiveness and advantages of the proposed strategy.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"5 4","pages":"1350-1361"},"PeriodicalIF":0.0,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438570","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 : 2024-04-25DOI: 10.1109/JESTIE.2024.3393628
Nazmus Sakib;Abasifreke Ebong;Madhav D. Manjrekar
This article proposes design and implementation of a new multiresonant gate driver circuit for silicon carbide (SiC) metal–oxide–semiconductor field-effect transistors (MOSFETs). The proposed gate driver circuit consumes less power than a conventional gate driver (CGD) circuit at high switching frequency applications. Power consumption in the gate driver circuit is proportional to the operating switching frequency and is significant in higher switching frequency applications. A CGD circuit can provide unipolar gate pulses and all the energy provided to the gate driver is dissipated in the gate resistance. A resonant circuit can be used to recycle part of the energy stored in the gate capacitance and reduce the overall power consumption by the gate driver. For efficient operation of the MOSFET, it is desirable to provide unequal voltage levels during switching operation. In this study, a novel gate driving circuit is presented, which provides unequal voltage levels with clamping functionality utilizing higher order harmonics. A detailed analysis of the gate driving power loss is provided. In addition, detailed design procedure, and experimental verification are presented. According to the experimental results, the proposed gate driver can reduce up to 65% of the gate driver power consumption compared to a CGD circuit.
{"title":"A New Multiresonant Gate Driver Circuit for SiC MOSFETs","authors":"Nazmus Sakib;Abasifreke Ebong;Madhav D. Manjrekar","doi":"10.1109/JESTIE.2024.3393628","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3393628","url":null,"abstract":"This article proposes design and implementation of a new multiresonant gate driver circuit for silicon carbide (SiC) metal–oxide–semiconductor field-effect transistors (MOSFETs). The proposed gate driver circuit consumes less power than a conventional gate driver (CGD) circuit at high switching frequency applications. Power consumption in the gate driver circuit is proportional to the operating switching frequency and is significant in higher switching frequency applications. A CGD circuit can provide unipolar gate pulses and all the energy provided to the gate driver is dissipated in the gate resistance. A resonant circuit can be used to recycle part of the energy stored in the gate capacitance and reduce the overall power consumption by the gate driver. For efficient operation of the MOSFET, it is desirable to provide unequal voltage levels during switching operation. In this study, a novel gate driving circuit is presented, which provides unequal voltage levels with clamping functionality utilizing higher order harmonics. A detailed analysis of the gate driving power loss is provided. In addition, detailed design procedure, and experimental verification are presented. According to the experimental results, the proposed gate driver can reduce up to 65% of the gate driver power consumption compared to a CGD circuit.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"5 3","pages":"805-812"},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141561058","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 : 2024-04-25DOI: 10.1109/JESTIE.2024.3393616
Nagesha Chitpadi;N Lakshminarasamma
Synchronous rectifier schemes for the resonant dc–dc converter significantly improve the power conversion efficiency. The predictive synchronous rectification scheme for an LCLC resonant converter for a battery charging and telecom application is proposed in this work. During converter operation, the resonant capacitor voltage is sensed through an analog to digital converter, and based on the discretized time domain equations, the turn- on and turn- off instances are precisely computed using computation and synchronous MOSFET on time predictor block for varying switching frequency of operation. The proposed predictive technique eliminates the need for current sensors, reducing overall system cost and conduction loss associated with it. The proposed predictive synchronous rectification method is tested in a 1 kW hardware prototype for varying line and load conditions. The proposed control scheme is able to track turn- on and turn- off instances precisely with a low timing error of 2% to 3% of the synchronous MOSFET ON time.
{"title":"Predictive Synchronous Rectification Control Scheme for Resonant DC–DC Converters for Battery Charging and Telecom Application","authors":"Nagesha Chitpadi;N Lakshminarasamma","doi":"10.1109/JESTIE.2024.3393616","DOIUrl":"https://doi.org/10.1109/JESTIE.2024.3393616","url":null,"abstract":"Synchronous rectifier schemes for the resonant dc–dc converter significantly improve the power conversion efficiency. The predictive synchronous rectification scheme for an \u0000<italic>LCLC</i>\u0000 resonant converter for a battery charging and telecom application is proposed in this work. During converter operation, the resonant capacitor voltage is sensed through an analog to digital converter, and based on the discretized time domain equations, the turn-\u0000<sc>on</small>\u0000 and turn-\u0000<sc>off</small>\u0000 instances are precisely computed using computation and synchronous MOSFET on time predictor block for varying switching frequency of operation. The proposed predictive technique eliminates the need for current sensors, reducing overall system cost and conduction loss associated with it. The proposed predictive synchronous rectification method is tested in a 1 kW hardware prototype for varying line and load conditions. The proposed control scheme is able to track turn-\u0000<sc>on</small>\u0000 and turn-\u0000<sc>off</small>\u0000 instances precisely with a low timing error of 2% to 3% of the synchronous MOSFET ON time.","PeriodicalId":100620,"journal":{"name":"IEEE Journal of Emerging and Selected Topics in Industrial Electronics","volume":"5 4","pages":"1698-1708"},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434620","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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