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Stability Investigation of DC Microgrids Under Stealth Cyber Attacks 隐形网络攻击下直流微电网稳定性研究
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595243
Minrui Leng, Subham S. Sahoo, F. Blaabjerg
{"title":"Stability Investigation of DC Microgrids Under Stealth Cyber Attacks","authors":"Minrui Leng, Subham S. Sahoo, F. Blaabjerg","doi":"10.1109/ECCE47101.2021.9595243","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595243","url":null,"abstract":"In a networked DC microgrid, stealth cyber-attacks can easily penetrate into the system and deceive the system observer not only to raise security concerns but also in destabilizing the microgrid. Apart from channeling efforts into ensuring security, considerable focus also need to be put into investigating the impact of stealth attack on system stability simultaneously. Hence, this paper investigates the system stability of DC microgrids for different magnitude of stealth cyber attacks. Firstly, a small signal model of dc microgrid under stealth attack is obtained in this paper. Then, modeling the stealth cyber attack as a non-linear and discontinuous input considering a strategic perspective by the adversary, the describing function method is adopted to analyze the stability of the system. The instability caused solely due to the presence of stealth cyber attacks has been revealed, even though the global consensus should supposedly be met. Finally, simulations are presented to validate the theoretical analysis.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"2 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114010126","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}
引用次数: 2
Direct Flux and Load Angle Vector Control of Permanent Magnet Synchronous Motors 永磁同步电机直接磁通与负载角矢量控制
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595616
S. Rubino, F. Mandrile, Luisa Tolosano, E. Armando, R. Bojoi
{"title":"Direct Flux and Load Angle Vector Control of Permanent Magnet Synchronous Motors","authors":"S. Rubino, F. Mandrile, Luisa Tolosano, E. Armando, R. Bojoi","doi":"10.1109/ECCE47101.2021.9595616","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595616","url":null,"abstract":"Transportation electrification is leading to an impressive development of electric drives (eDrives) using permanent magnet synchronous motors (PMSMs). However, these drive solutions need high-performance torque controllers that must be easy to tune and able to deal with saturated machines. Besides, the torque regulation must be linear for the entire operating speed range, including deep flux-weakening operation. According to the current state-of-the-art, the torque controllers for traction applications are mostly based on vector control schemes using inner current control loops (CVC). Moreover, the reference currents are often provided by multidimensional calibrated maps to linearize the torque regulation. However, the performance of CVC schemes depends on the machine inductances, whose values change with the operating point and thus making necessary the execution of demanding tuning procedures. Therefore, this paper proposes a novel torque controller for PMSMs based on inner flux- and load angle-control loops since their performance is independent of machine inductances, i.e., magnetic saturation phenomena. Also, the torque linearization relies on a simple calibrated map providing maximum torque production under inverter current and voltage constraints. Experimental results are provided for a 10 kW PMSM for light traction applications.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127696092","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}
引用次数: 1
Bidirectional Resonant Frequency Tracking for CLLC Converters Based On Voltage Falling Edges 基于降压边的CLLC变换器双向谐振频率跟踪
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9594977
Jun Min, M. Ordonez
{"title":"Bidirectional Resonant Frequency Tracking for CLLC Converters Based On Voltage Falling Edges","authors":"Jun Min, M. Ordonez","doi":"10.1109/ECCE47101.2021.9594977","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9594977","url":null,"abstract":"Due to high efficiency and bidirectional capability, unregulated CLLC converters have significant potential for the DC transformer and chargers with two stages, where the switching frequency is designed to be fixed at resonance. However, the actual resonant frequency may drift from the designed value because of resonant tank component tolerances, temperature, and aging. This leads to a decrease in efficiency for unregulated CLLC converters with a fixed frequency. To solve these issues, a bidirectional resonant frequency tracking method is proposed for CLLC converters in this paper. Based on the analysis of input and output impedance, a unique feature is discovered that no matter how resonant tank parameters deviate, the switching frequencies harvesting maximum efficiency are identical for bidirectional operations. To track this global optimal switching frequency, the proposed method adopts a voltage edges-based sensing technique, so the bidirectional tracking is realized and costly current sensors of conventional methods are eliminated. It is lower cost and robust against noise. Experimental results show that bidirectional fast-tracking and efficiency improvement are achieved for parameter deviation conditions.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126282142","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}
引用次数: 2
ECCE 2021 Industry Sponsors and Exhibitors ECCE 2021行业赞助商和参展商
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ecce47101.2021.9595019
{"title":"ECCE 2021 Industry Sponsors and Exhibitors","authors":"","doi":"10.1109/ecce47101.2021.9595019","DOIUrl":"https://doi.org/10.1109/ecce47101.2021.9595019","url":null,"abstract":"","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126433632","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}
引用次数: 0
The Effect of Pulsed Current on the Lifetime of Lithium-ion Batteries 脉冲电流对锂离子电池寿命的影响
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9594993
Xinrong Huang, Siyu Jin, Jinhao Meng, R. Teodorescu, D. Stroe
{"title":"The Effect of Pulsed Current on the Lifetime of Lithium-ion Batteries","authors":"Xinrong Huang, Siyu Jin, Jinhao Meng, R. Teodorescu, D. Stroe","doi":"10.1109/ECCE47101.2021.9594993","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9594993","url":null,"abstract":"The pulsed current charging technique has been proposed to improve the charging performance and lifetime of Lithium-ion batteries. However, the optimal operating conditions of the pulsed current, e.g., profile, frequency, duty cycle, and amplitude, still need to be investigated. This work focuses on investigating the effect on the lifetime of Lithium-ion battery cells of the positive pulsed current (PPC) in the low-frequency range between 0.05 Hz and 1 Hz. According to the results of cycling aging tests, the PPC charging at 0.05 Hz can extend the lifetime up to 60% compared with the traditional constant current (CC) charging. Furthermore, a lifetime model of the battery cell in terms of the capacity fade and the increase in internal resistance is developed to estimate the effect of the PPC charging at different frequencies on the lifetime of the Lithium-ion battery cells.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126468834","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}
引用次数: 6
Surge Voltage Reduction Method for DAB Matrix Converter using Circulating Current in Whole Load Condition 全负荷状态下循环电流DAB矩阵变换器的浪涌电压降低方法
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595284
Shunsuke Takuma, Kashin Kiri, Hiroki Watanabe, Jun-ichi Itoh
{"title":"Surge Voltage Reduction Method for DAB Matrix Converter using Circulating Current in Whole Load Condition","authors":"Shunsuke Takuma, Kashin Kiri, Hiroki Watanabe, Jun-ichi Itoh","doi":"10.1109/ECCE47101.2021.9595284","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595284","url":null,"abstract":"This paper proposes a surge voltage reduction method by achieving zero-voltage switching (ZVS) for a matrix converter or an inverter of a dual active bridge (DAB) matrix converter with circulating current in discontinuous current mode (DCM). In traditional DAB converter, ZVS cannot be achieved including a light load condition. The duty ratio calculation for a circulating current is revealed to achieve an input power factor correction and ZVS. From the experimental results with a prototype, the ZVS operation is achieved by increasing the circulating current even zero-transmission power. In addition, the grid current distortion is lower than 5.0% at the rated power regardless of the DC voltage variation of plus or minus 20%.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128008145","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}
引用次数: 1
Characteristics of Buck/Boost Operation in an Isolated DC-DC Converter based on a Phase-Shift-Controlled High-Frequency Inverter 基于移相控制高频逆变器的隔离型DC-DC变换器的降压/升压工作特性
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595603
Shohei Komeda, M. Yamashita
{"title":"Characteristics of Buck/Boost Operation in an Isolated DC-DC Converter based on a Phase-Shift-Controlled High-Frequency Inverter","authors":"Shohei Komeda, M. Yamashita","doi":"10.1109/ECCE47101.2021.9595603","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595603","url":null,"abstract":"This paper proposes an isolated dc-dc converter for realizing an independently control of buck/boost operation by the primary and secondary side, respectively. The proposed circuit consists of two phase-shift controlled high-frequency inverters. The inverter has a snubber inductor and a snubber capacitor for realizing zero-current and zero-voltage switching for all switching devices when phase-shift control method is applied. Therefore, the inverter and rectifier can independently operate with the phase-shift control method to achieve buck/boost operation. This paper presents the circuit configuration and basic operation principle of the proposed circuit. Validity of the operation principle is confirmed by a 100-V, 600-W experimental setup with half and 1.5 times output voltage conditions.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128142384","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}
引用次数: 0
Performance Comparison of Large-scale Design-optimised Non-overlap and Overlap Winding Wound Rotor Synchronous Generators 大型设计优化无重叠与重叠绕线转子同步发电机性能比较
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595003
K. S. Garner, M. Kamper
{"title":"Performance Comparison of Large-scale Design-optimised Non-overlap and Overlap Winding Wound Rotor Synchronous Generators","authors":"K. S. Garner, M. Kamper","doi":"10.1109/ECCE47101.2021.9595003","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595003","url":null,"abstract":"The use of non-overlap windings rather than overlap windings is a topic for debate. Non-overlap windings are generally cheaper and easier to manufacture, but result in a high amount of magnetomotive force sub- and higher-order harmonics. A strategy to reduce these harmonics has been previously published and this study aims to provide a performance comparison of a large-scale wound rotor synchronous generator with a modified non-overlap winding and a classical overlap winding. Hence, design optimisations of a 16/18 and 16/72 pole/slot grid-connected 3 MW wound rotor synchronous generator for medium-speed wind generation are conducted. The optimisations are performed using the modified method of feasible direction gradient-based optimisation because of its simplicity and fast results. Optimal solutions for the 16/18 and 16/723 MW models are obtained and the performance of the solutions compared. The results show that the 3 MW 16/18 model performs favourably against the 3 MW 16/72 model, especially regarding the lower active mass.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125597114","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}
引用次数: 3
An amplitude-modulated pseudo-random binary sequence approach to broadband impedance spectroscopy for photovoltaic module system identification 用于光伏组件系统识别的宽带阻抗谱调幅伪随机二值序列方法
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595969
Linda Shelembe, P. Barendse
{"title":"An amplitude-modulated pseudo-random binary sequence approach to broadband impedance spectroscopy for photovoltaic module system identification","authors":"Linda Shelembe, P. Barendse","doi":"10.1109/ECCE47101.2021.9595969","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595969","url":null,"abstract":"Pseudo-random binary sequence (PRBS) has been used for internal impedance identification and shown to be faster and easier to implement than analogue multiple frequency signals. To implement this technique on PV modules – which have a wider impedance bandwidth, the following needs to be considered. Both converter and PV module are non-linear, and since a varying frequency module excitation signal is induced through a bandwidth limited non-linear converter, this presents linearity issues. This study demonstrates the use of a parametric APRBS excitation signal, designed by defining the signal design points as a series of ramp functions This parametric profile mitigates the frequency induced system non-linearities, while producing fast and accurate online impedance estimation across a wide bandwidth. The results show that the APRBS achieves good tolerance for the induced system non-linearities – this is demonstrated by a small impedance error between the designed system and a Frequency Response Analyzer (FRA) for all frequencies within the bandwidth of the module.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126019012","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}
引用次数: 4
Transient Stability Enhancement for Virtual Synchronous Generator by Combining Direct Power Control 结合直接功率控制增强虚拟同步发电机暂态稳定性
2021 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2021-10-10 DOI: 10.1109/ECCE47101.2021.9595568
Xuejiao Zhong, Yutao Lou, Tiliang Wen, Donghai Zhu, X. Zou, Xiang Guo
{"title":"Transient Stability Enhancement for Virtual Synchronous Generator by Combining Direct Power Control","authors":"Xuejiao Zhong, Yutao Lou, Tiliang Wen, Donghai Zhu, X. Zou, Xiang Guo","doi":"10.1109/ECCE47101.2021.9595568","DOIUrl":"https://doi.org/10.1109/ECCE47101.2021.9595568","url":null,"abstract":"Virtual synchronous generator (VSG) control-based grid-connected converter (GCC) is an attractive method to solve the inertia issue of more renewable energy-integrated power system. However, The transient instability issues of VSG under grid faults may result in several security problems. To cope with the issue, this paper firstly analyzes the transient instability mechanism. It indicates that the roots of instability phenomenon are the continuous phase angle integration in active power loops caused by insufficient power transmission capacity, and the Q - v- i - P coupling. Based on it, a new direct power based VSG control (DPVSG) is proposed by combining the direct power control (DPC). With the method, the aforesaid power coupling can be significantly weakened, thus the transient stability can be improved. Finally, the proposed method is validated by the simulation.","PeriodicalId":349891,"journal":{"name":"2021 IEEE Energy Conversion Congress and Exposition (ECCE)","volume":"64 29","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113937461","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}
引用次数: 1
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