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IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society最新文献

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Investigations on Numerical Techniques for Detecting Variations in Acoustic Emissions 探测声发射变化的数值技术研究
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589074
Selvine G. Mathias, Mathew John Mancha, Daniel Grossmann, Bernd Kujat, Kay Schiebold
The objective of this paper is to present a hybrid methodology of analysing acoustic signals arising in industrial processes through comparisons of known numerical techniques such as clustering. Apart from data acquisition and pre-processing, the other essential component of using acoustics is to design an analysis methodology, that can culminate in practical applications. This paper applies Gaussian Mixture Models and Self-Organising Maps to cluster pre-processed AE hits obtained from acoustic sensors in the form of tensile, shear and mixed modes of compression on a material. For an in-depth analysis, custom features such as high peak regions, low peak regions, strongly hit and weakly hit signals are introduced to compare with the clusters formed. The results show that for small AE signals that are obtained or extracted after events detection, a time-domain based clustering can be applied and used for isolating similarities and distinctions among the signals belonging to the same group.
本文的目的是提出一种混合方法,通过比较已知的数值技术,如聚类,来分析工业过程中产生的声信号。除了数据采集和预处理之外,使用声学的另一个重要组成部分是设计一种分析方法,这可以在实际应用中达到高潮。本文应用高斯混合模型和自组织图对从声学传感器获得的材料上拉伸、剪切和混合压缩模式的预处理声发射命中进行聚类。为了深入分析,引入自定义特征,如高峰区域、低高峰区域、强撞击和弱撞击信号,与形成的集群进行比较。结果表明,对于事件检测后获得或提取的小声发射信号,可以采用基于时域的聚类方法分离同组信号之间的相似性和差异性。
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引用次数: 0
Proposal of Sensorless Vehicle Detection Method for Start-up Current Control in Dynamic Wireless Power Transfer System 动态无线输电系统中启动电流控制无传感器车辆检测方法的提出
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589667
Takumi Hamada, Daisuke Shirasaki, Toshiyuki Fujita, H. Fujimoto
This paper discusses the start-up process for a dynamic wireless power transfer system to an electric vehicle passing a road-side coil. To transfer maximum energy in a short time, the process of detecting an approaching vehicle and transmitting power must be carried out quickly. In most of the previous studies, problems of vehicle detection and power transmission have been considered separately. In this paper, the power transmission control process is proposed that combines vehicle detection and current control. The detection process uses only vehicle-side voltage pulse which enables both road-side and vehicle-side coils to sense approaching of the vehicle-side coil. And the current control suppresses the current overshoot at the start of power transmission. The proposed method was verified by experiments. Both coils could detect another one at a sufficient distance from each other. Additionally, power transmission starts at a point of small coupling coefficient was achieved without current overshoot.
本文讨论了电动汽车通过路边线圈时动态无线电力传输系统的启动过程。为了在短时间内最大限度地传输能量,必须快速完成探测临近车辆和传输功率的过程。在以往的大多数研究中,车辆检测和动力传输问题都是分开考虑的。本文提出了将车辆检测与电流控制相结合的动力传动控制过程。检测过程仅使用车侧电压脉冲,使道路侧和车侧线圈都能感知到车侧线圈的接近。电流控制抑制了动力传输开始时的电流超调。实验验证了该方法的有效性。两个线圈都可以在彼此足够距离的地方探测到另一个线圈。此外,在没有电流超调的情况下,实现了小耦合系数点的动力传输。
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引用次数: 1
A Synchronous Rectification Method of Bidirectional CLLC Resonant Converter Based on Phase and Duty Cycle Regulation 基于相位和占空比调节的双向CLLC谐振变换器同步整流方法
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589467
Xiaobo Liu, Xiaohua Wu, Xiangke Li, Xinyue Zhang, Fei Deng, Shixian Sun
In bidirectional CLLC resonant converter, if the parasitic inverse diodes of MOSFETs are used for rectification without driving signals at the secondary side, there will have a larger conduction loss when current flows through them. Therefore, the driving signals of MOSFETs at the secondary side of the converter for synchronous rectification can be modulated to reduce the circuit conduction loss. To solve this issue, in this paper, a synchronous rectification method based on regulating phase and duty cycle of the secondary side MOSFETs driving signals in bidirectional CLLC resonant converter is proposed to reduce the conduction loss. According to the relationship between the switching frequency and the first resonant frequency, the driving signals of synchronous rectifier can be achieved. Then the feasibility and validity are verified by simulation.
在双向CLLC谐振变换器中,如果使用mosfet的寄生逆二极管进行整流,而在二次侧没有驱动信号,那么电流流过它们时,会产生较大的导通损耗。因此,可以调制用于同步整流的变换器二次侧mosfet的驱动信号,以降低电路导通损耗。针对这一问题,本文提出了一种基于调节双向CLLC谐振变换器中二次侧mosfet驱动信号相位和占空比的同步整流方法,以降低传导损耗。根据开关频率与第一谐振频率的关系,可以得到同步整流器的驱动信号。通过仿真验证了该方法的可行性和有效性。
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引用次数: 1
Dynamic Modelling Requirements for Tuning of Cascaded Voltage and Current Loops in VSMs VSMs中级联电压和电流环路调谐的动态建模要求
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589247
Shuan Dong, Y. Chen
This paper identifies the importance of considering the full-order virtual synchronous machine (VSM) dynamics while tuning parameters in its cascaded voltage and current control loops. Via a numerical example, we highlight that the conventional tuning method of the voltage and current loops may not ensure system stability. This is because the tuning method does not consider full-order system dynamics. Thus, we improve the tuning method for the VSM voltage and current loops using small-signal analysis of the full-order VSM model. The proposed tuning method ensures system stability in the small-signal sense, and it is computationally inexpensive. We verify the effectiveness of the proposed tuning method via numerical simulations.
本文指出了在对全阶虚拟同步机(VSM)的级联电压和电流控制回路进行参数整定时考虑其动态特性的重要性。通过一个数值算例,我们强调了传统的电压和电流环的调谐方法可能不能保证系统的稳定性。这是因为调优方法不考虑全阶系统动力学。因此,我们利用全阶VSM模型的小信号分析改进了VSM电压和电流环的调谐方法。所提出的调谐方法保证了系统在小信号意义上的稳定性,并且计算成本低。通过数值仿真验证了所提调谐方法的有效性。
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引用次数: 1
Detection of Interturn Short-Circuits of E-Bike BLDC motor 电动自行车无刷直流电机匝间短路检测
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589858
Z. Frank, J. Laksar
The interturn short-circuit is one of the most often failures of electric motors which can lead to serious consequences with the irreversible damage of the whole drive. The detection of these short-circuits is a challenging task depending also on the parameters of the winding of the analyzed machine. The equivalent circuit parameters are minimally affected if the winding consists of a high number of parallel wires, and only a single turn of one parallel wire is short-circuited. The measurement of additional Joule losses are then expected to be the most proper approach; the special rotor and testing stand for this purpose is designed in this paper to ensure easy manipulation with the measured stators.
匝间短路是电动机最常见的故障之一,它会对整个传动系统造成不可逆转的损害。这些短路的检测是一项具有挑战性的任务,这也取决于被分析机器的绕组参数。如果绕组由大量平行导线组成,并且只有一圈平行导线短路,则等效电路参数受到的影响最小。测量额外的焦耳损失被认为是最合适的方法;为此设计了专用的转子和试验台,以保证对被测定子的操作方便。
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引用次数: 0
Active Damping Control Strategies for WEC with VSM considering DC-Link Dynamics 考虑DC-Link动力学的具有VSM的WEC主动阻尼控制策略
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589533
M. Rose, K. Günther, C. Sourkounis
The rising share of wind energy conversion systems in the electric energy supply results in growing economical aspects of the assets’ size and maintenance costs as well as in challenges to maintain the stability and robustness of the utility grid. To fulfill requirements such as ancillary grid services, the virtual synchronous machine has been in the focus of research as grid-supporting or grid-forming control for grid-connected power electronic converters. Its application in WEC requires an adaption of the overall control structure compared to a conventional vector control, so that also the widely investigated active damping controls for mechanical torsional oscillations need to be analyzed for the adapted structure with a machine-side DC-voltage control. Therefore, in this paper methods to achieve active damping of torsional oscillations are designed with extended DC-voltage control. A special regard is put on the non-linearity of the intermediate circuit and the variable stator voltages of variable-speed WECs. Simulation results validate the effectiveness of the active damping controls and the stability of DC-link voltage control.
风能转换系统在电力供应中所占的份额不断上升,导致资产规模和维护成本的经济性不断提高,同时也给维持公用事业电网的稳定性和稳健性带来了挑战。为了满足电网辅助服务等需求,虚拟同步机作为并网电力电子变流器的并网支撑或成网控制一直是研究的热点。与传统的矢量控制相比,它在WEC中的应用需要对整体控制结构进行自适应,因此,对于采用机侧直流电压控制的自适应结构,也需要对研究广泛的机械扭振主动阻尼控制进行分析。因此,本文设计了采用扩展直流电压控制实现扭振主动阻尼的方法。本文特别关注了变频无功电机中间电路的非线性和定子电压的变化。仿真结果验证了主动阻尼控制的有效性和直流电压控制的稳定性。
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引用次数: 0
A Coupled Inductor-Based Dual-Switch High Step-up DC-DC Converter with Common Ground 基于电感耦合的双开关高升压共地DC-DC变换器
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589101
Saeed Habibi, Ramin Rahimi, M. Ferdowsi, P. Shamsi
A non-isolated dual-switch high step-up DC-DC converter with a two-winding coupled inductor (CI) is proposed in this paper. The proposed topology is achieved by using a combination of the diode-capacitor voltage multiplier cells and a CI, resulting in the high voltage gain and low voltage stress on the power switches. The low voltage stress across power switches helps to reduce the power loss of the converter by employing low-voltage-rating power switches. The proposed topology has a continuous input current, and the common electrical ground between the input and output ports is preserved. The steady-state analysis is done for the proposed converter, and superiorities of the proposed converter over the existing topologies are demonstrated using a comparison study. To verify the steady-state analysis, simulation results of a 40 V to 400 V, 400 W converter are reported; the simulation is done in PLECS software.
提出了一种带双绕组耦合电感(CI)的非隔离双开关高升压DC-DC变换器。所提出的拓扑结构是通过使用二极管电容器电压倍增器单元和CI的组合来实现的,从而在功率开关上获得高电压增益和低电压应力。通过采用低额定电压功率开关,跨功率开关的低电压应力有助于降低变换器的功率损耗。所提出的拓扑结构具有连续输入电流,并且保留了输入和输出端口之间的公共电接地。对所提出的变换器进行了稳态分析,并通过比较研究证明了所提出的变换器相对于现有拓扑结构的优越性。为了验证稳态分析,给出了40 V ~ 400 V、400 W变换器的仿真结果;仿真在PLECS软件中完成。
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引用次数: 5
Stability Analysis of Fuel Cell/Battery On-Board DC Microgrid Based on Mixed Potential Theory 基于混合电位理论的燃料电池/电池车载直流微电网稳定性分析
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589179
Y. Huangfu, Aiben Wang, Cong Yuan
In this paper, a FC/Bat-based on-board DC microgrid is adopted. The FC provides the average power demand, and the battery provides the instantaneous increased power and absorbs the feedback power through virtual inductance and resistor droop control. Furthermore, the state of charge of the battery is take into consideration. The reference voltage of the battery unit Vref is adjusted by ΔV, which achieves the control of the charge and discharge current and maintains the stability of the battery SOC. Afterwards, analyze the large signal stability of the FC/Bat-based on-board DC microgrid based on the mixed potential theory. Then the large signal stability criterion is obtained. It is verified by simulation that the virtual resistance and inductance droop control can realize the power distribution and the large-signal stability criterion is correct.
本文采用基于FC/ bat的板载直流微电网。FC提供平均功率需求,电池提供瞬时增加的功率,并通过虚拟电感和电阻下垂控制吸收反馈功率。此外,还考虑了电池的充电状态。通过ΔV调节电池单元Vref的参考电压,实现对充放电电流的控制,保持电池SOC的稳定。然后,基于混合电位理论分析了基于FC/ bat的板载直流微电网的大信号稳定性。得到了大信号稳定性判据。仿真验证了虚拟电阻和电感下垂控制能够实现功率分配,大信号稳定判据是正确的。
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引用次数: 1
Fault Limiting Circuit based protection for DC and AC Faults in HB-MMC HVDC Systems 基于限流电路的HB-MMC直流和交流故障保护
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589143
Sukrashis Sarkar, A. Das
The Half bridge Modular Multilevel Converter (HB-MMC) based High Voltage Direct Current (HVDC) Transmission systems faces various challenges due to DC faults and AC faults. In case of DC faults (pole-to-pole and pole-to-ground fault), the high fault current flowing through MMC arms may damage the devices present in the MMC. Among the AC faults, the valve side single phase to ground (SPG) fault in HB-MMC based asymmetrical monopolar and bipolar HVDC system is one of the most serious faults. It produces some special characteristics like non-zero crossing of the grid side currents which prevent the AC Circuit breakers (ACCBs) present in the grid side from operating; further, capacitor overvoltage happens in upper arm submodules. In this paper, a Fault Limiting Circuit (FLC) is proposed to solve the above problems. The proposed circuit acts as a parallel LC resonant circuit formed by inserting a capacitor in parallel to arm inductor during fault condition which provides high impedance to the fault current path and reduces the fault current. This circuit is activated during fault condition only, hence the efficiency of the converter is not compromised. The operation of the FLC with HB-MMC is analyzed and verified by simulation in EMTP platform, showing a good agreement between simulation results and theoretical analysis.
基于半桥模块化多电平变换器(HB-MMC)的高压直流输电系统面临着直流故障和交流故障带来的各种挑战。在直流故障(极对极和极对地故障)的情况下,流经MMC臂的高故障电流可能会损坏MMC中的设备。在交流故障中,基于HB-MMC的非对称单、双极直流系统的阀侧单相接地故障是最严重的故障之一。它产生了一些特殊的特性,如电网侧电流的非零交叉,阻止了电网侧交流断路器(accb)的运行;此外,电容器过电压发生在上臂子模块。本文提出了一种故障限制电路(FLC)来解决上述问题。该电路作为并联LC谐振电路,在故障状态下在臂电感并联插入电容,为故障电流路径提供高阻抗,减小故障电流。该电路仅在故障状态时激活,因此转换器的效率不会受到损害。在EMTP平台上对采用HB-MMC的FLC进行了仿真分析和验证,仿真结果与理论分析吻合较好。
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引用次数: 7
Analysis of Solar PV Fed Dynamic Wireless Charging System for Electric Vehicles 电动汽车太阳能光伏动态无线充电系统分析
Pub Date : 2021-10-13 DOI: 10.1109/IECON48115.2021.9589677
Kundan Kumar, Kantipudi V. V. S. R. Chowdary, P. Sanjeevikumar, R. Prasad
The promising growth of Electric Vehicles (EVs) places a mandate for a continuous increment in the power demand on the grid. To prepare for this directive, charging infrastructure plays a vibrant role. The future evolving technology for implementing charging infrastructure with the concept of no wait time to charge the battery is workable with a dynamic wireless charging system (DWCS). In this paper, the comprehensive assessment and performance analysis of solar PV-powered and the dc grid-powered DWCS is investigated. Further, the simulation is carried out through MATLAB software of version 2020a to examine and analyze the performance of the DWCS. Finally, it is observed that the solar PV-powered DWCS needs power help during the poor weather conditions which can be effectively executed by switching to the dc grid.
随着电动汽车(ev)的蓬勃发展,电网的电力需求将持续增长。为了迎接这一指令,充电基础设施发挥着积极的作用。实现充电无等待时间概念的充电基础设施的未来发展技术与动态无线充电系统(DWCS)是可行的。本文对太阳能光伏供电和直流并网供电的DWCS进行了综合评价和性能分析。通过2020a版本的MATLAB软件进行仿真,对DWCS的性能进行检验和分析。最后,观察到太阳能光伏供电的DWCS在恶劣天气条件下需要电力帮助,这可以通过切换到直流电网有效地执行。
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引用次数: 5
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IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society
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