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2018 IEEE 4th Southern Power Electronics Conference (SPEC)最新文献

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Comparative Study of Performance for Different Winding Connections of Dual-channel Switched Reluctance Machine Using Frozen Permeability 基于冷冻磁导率的双通道开关磁阻电机不同绕组连接性能比较研究
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635851
X. Cui, Jianbo Sun, C. Gu
Inductance characteristics play an important role in the output torque of the switched reluctance motor (SRM) whereas the windings connection form affects the mutual coupling between phases. According to the magnetic polarity models, dual-channel switched reluctance machine (DCSRM) with NNNSSSNNNSSS winding polarity is defined as DCSRMI, DCSRM with NSNSNSNSNSNS is defined as DCSRM2 and DCSRM with NNSSNNSSNNSS is defined as DCSRM3. Previous papers show that DCSRMs with different winding connections can offer different average torque, copper loss, iron loss and efficiency, but the work that different winding connections of DCSRMs running with channel fault is rarely carried out. This paper presents comparative studies of dynamic performance and magnetic characteristics of DCSRMs running with channel fault whereas only the winding connection type that differs. The frozen permeability method is adopted to compute static inductance and torque characteristics and to analyze the magnetic characteristics of the different winding connection models. The results show that the connection type of DCSRM3 can obviously enhance the average torque and minimize the torque ripple under the condition of channel fault. However the iron loss of DCSRM3 is highest among the three types under dual-channel excitation condition, which lowers the overall efficiency. By simulation analyses, a novel four-phase 16/12-poles fault-tolerant DCSRM called even-phase fault tolerance has been proposed. No matter in dual-channel excitation nor in single-channel excitation operation conditions, the performance of this even-phase DCSRM can be the best.
电感特性对开关磁阻电机的输出转矩起着重要的作用,而绕组的连接形式又影响着相间的相互耦合。根据磁极性模型,将绕组极性为NNNSSSNNNSSS的双通道开关磁阻电机(DCSRM)定义为DCSRMI,将带NSNSNSNSNSNS的DCSRM定义为DCSRM2,将带NNSSNNSSNNSS的DCSRM定义为DCSRM3。前人的研究表明,不同绕组连接方式的dcsrm可以提供不同的平均转矩、铜损、铁损和效率,但对不同绕组连接方式的dcsrm在通道故障情况下运行的研究很少。本文对比研究了有通道故障运行的直流直流电机的动态性能和磁特性,而绕组连接方式不同。采用冻结磁导率法计算了绕组的静态电感和转矩特性,分析了不同绕组连接方式的磁特性。结果表明,DCSRM3的连接方式可以明显提高通道故障情况下的平均转矩,减小转矩脉动。但在双通道激励条件下,DCSRM3的铁损最大,降低了整体效率。通过仿真分析,提出了一种新颖的四相16/12极容错DCSRM——偶相容错。无论在双通道励磁还是单通道励磁工况下,该双相DCSRM的性能都是最好的。
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引用次数: 2
Optimal Operational Scheduling of Smart Microgrids Considering Hourly Reconfiguration 考虑小时重构的智能微电网最优运行调度
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635981
S. Esmaeili, S. Jadid, A. Anvari‐Moghaddam, J. Guerrero
In this paper, optimal operational scheduling in smart microgrids in conjunction with hourly reconfiguration is investigated. The optimization problem has the objective function of minimizing total costs including the total loss, cost of bilateral contracts with fuel cell and photovoltaic owners, switching cost, and cost of exchanged power with wholesale market. To prevent the aged and risky switches from frequent switching actions over a short-term scheduling, a new index for switching action based on the remotely-controlled switch (RCS) ages and critical locations in the network is defined. The proposed optimization model is non-convex and non-linear, which is transformed into a Mixed-Integer Linear Programming (MILP) problem to be solvable with conventional solvers. The satisfactory performance of the proposed model is demonstrated on the 84-bus Taiwan power company system.
本文研究了考虑小时重构的智能微电网最优调度问题。优化问题的目标函数为总成本最小,包括总损失、与燃料电池和光伏业主的双边合同成本、转换成本和与批发市场交换电力的成本。为了防止老交换机和危险交换机在短期调度中频繁切换,定义了一种基于RCS年龄和网络关键位置的切换动作指标。所提出的优化模型是非凸非线性的,将其转化为一个混合整数线性规划(MILP)问题,用传统的求解方法求解。该模型在84母线台湾电力公司系统上取得了满意的运行效果。
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引用次数: 5
A Novel Zero-Voltage-Detector for Buck Converter in Discontinuous Conduction Mode(DCM) 一种用于Buck变换器断续导通模式(DCM)的新型零电压检测器
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635909
Meng Jia, Zhuochao Sun, L. Siek
This paper presents a Zero-Voltage-Detector (ZVD) circuit for buck converters working in discontinuous conduction mode (DCM). A novel comparator with pre-amplification property is proposed to provide fast sensing and comparison to optimize the switching timing of power transistors, hence minimizing the power losses caused by the reverse inductor current. The proposed DCM buck converter is fabricated using 0.18um CMOS technology with a chip area of 0.9mm 2. The simulated sensing delay of the proposed ZVD is only about 6ns. It achieves $gt 85$% power efficiency for load currents of $gt 10$ mA when the input and output voltages are 3.3V and 2.4V respectively.
本文提出了一种用于工作在不连续导通模式下的降压变换器的零电压检测器(ZVD)电路。提出了一种具有预放大特性的新型比较器,提供快速的传感和比较,优化功率晶体管的开关时间,从而最大限度地减少反向电感电流造成的功率损失。该DCM降压变换器采用0.18um CMOS工艺,芯片面积为0.9 mm2。所提出的ZVD的模拟传感延迟仅为6ns左右。当输入和输出电压分别为3.3V和2.4V时,负载电流为10 mA,功率效率为85 %。
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引用次数: 1
High-Performance CLL Resonant Multi-Channel LED Driver for Lighting Application 用于照明应用的高性能CLL谐振多通道LED驱动器
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635959
Wesley Poh Qi Tong, B. M. Muhammad Ramadan, T. Logenthiran, R. T. Naayagi, W. L. Woo, V. Phan
This paper presents a multi-channel, current-balancing coordinated light-emitting diode (LED) driver that employs a primary buck converter and a secondary two-stage CLL resonant-based inverter. The proposed LED driver is engineered with a switch-mode voltage regulator that maintains high power dissipation, controls current-carrying capacities respecting to load using half-bridge inverter coupled to a CLL resonant tank, and pose operating cycle uniformity at multiple current source outputs by cascaded balance capacitor-based transformers with voltage-doubler architectures. Conjointly, utilization of high switching frequency (282.7kHz) is endorsed to curtail current ripple deviations and stimulate balanced current distribution based on load capacities. Using PSIM simulation environment, the proposed multi-channel LED driver is evaluated to view its performance against dynamic installation of multi-stringed LEDs connected at variegated capacities. Succeedingly, development of a hardware prototype is annexed. The acquired simulation and hardware tests’ results have validated optimal coordination of current distributions for unbalanced loads (LEDs) across multiple channels.
本文提出了一种多通道、电流平衡协调发光二极管(LED)驱动器,该驱动器采用初级降压变换器和二级基于CLL谐振的逆变器。所提出的LED驱动器设计了一个开关模式稳压器,以保持高功耗,通过与CLL谐振槽耦合的半桥逆变器控制负载的载流能力,并通过级联平衡电容变压器实现多电流源输出的工作周期均匀性。同时,利用高开关频率(282.7kHz)可以减少电流纹波偏差并刺激基于负载能力的平衡电流分布。利用PSIM仿真环境,对所提出的多通道LED驱动器进行了评估,以观察其在不同容量连接的多串LED动态安装下的性能。最后,附上了硬件样机的开发。所获得的仿真和硬件测试结果验证了跨多个通道的不平衡负载(led)电流分布的最佳协调。
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引用次数: 1
Design Procedure for a Digital Proportional-Resonant Current Controller in a Grid Connected Inverter 并网逆变器中数字比例谐振电流控制器的设计过程
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8636052
T. Busarello, J. Pomilio, Marcelo Simoes
This paper presents a design procedure for a digital Proportional-Resonant (PR) current controller in a Grid Connected Inverter (GCI). The procedure describes a systematic list of how to compute the proportional and resonant gains as well as the coefficients for the digital resonant path. The main contribution of the design procedure is to facilitate and to support researchers who are designing GCI with current control strategies in a digital environment. The paper also presents a frequency domain analysis of a designed digital PR controller. The fictitious w-domain is used in such analysis. A case study shows the efficacy of GCI with a digital PR current controller designed based on the proposed procedure. Later, the paper discusses that the proposed procedure is valid also for digital PR controller with multiple resonant paths.
本文介绍了并网逆变器中数字比例谐振电流控制器的设计过程。该程序描述了如何计算比例和谐振增益以及数字谐振路径系数的系统列表。设计过程的主要贡献是促进和支持在数字环境中使用当前控制策略设计GCI的研究人员。本文还对所设计的数字PR控制器进行了频域分析。在这种分析中使用了虚构的w域。实例研究表明了基于所提程序设计的数字PR电流控制器的GCI的有效性。随后,本文讨论了该方法对于具有多谐振路径的数字PR控制器也是有效的。
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引用次数: 18
A Parallel-Output CLTCL Multi-Resonant Soft-Switching DC-DC Converter 一种并联输出CLTCL多谐振软开关DC-DC变换器
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635917
F. Han, Zhun Meng
In this paper, a novel CLTCL multi-resonant soft-switching DC-DC converter is proposed. It employs the dual transformers architecture, whose secondary sides are connected in parallel. The resonant tank contains multiple resonant components of capacitors and inductors. Through the appropriate parameter design, the converter can transmit the 1st and the 3rd harmonic active power simultaneously. Consequently, the utilization rate of the resonant current and high efficient conversion are both guaranteed. Widely adjustable DC voltage gain range is also achieved within a narrow frequency range. Besides, all the power switches obtain the turn-on zero-voltage-switching (ZVS), while the diodes attain the turn-on and turn-off zero-current-switching (ZCS) or quasi ZCS (Q-ZCS). To verify the feasibility of the converter, a 500W prototype is built and tested. The proposed converter is able to maintain relatively high efficiency (around 95%) among a wide load range. The highest efficiency reaches 95.4% at 300W.
本文提出了一种新型的CLTCL多谐振软开关DC-DC变换器。它采用双变压器结构,二次侧并联。谐振槽包含电容器和电感的多个谐振元件。通过适当的参数设计,变换器可以同时传输一、三次谐波有功功率。从而保证了谐振电流的利用率和高效率的转换。在较窄的频率范围内也可实现广泛可调的直流电压增益范围。此外,所有的电源开关都实现了零电压开关(ZVS)的导通,而二极管实现了零电流开关(ZCS)或准零电流开关(Q-ZCS)。为了验证该变换器的可行性,建立了一个500W的样机并进行了测试。所提出的变换器能够在较宽的负载范围内保持相对较高的效率(约95%)。300W时效率最高,达到95.4%。
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引用次数: 2
An Isolated Three-Port DC-DC Converter with Low-Voltage DC Bus for DC Microgrids 用于直流微电网的带低压直流母线的隔离三端口DC-DC变换器
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8636080
Panbao Wang, Xiaochen Zhang, Sibao Ding, Wei Wang, Dianguo Xu
The application of multi-port DC converters in DC microgrids (MGs) can effectively improve the integration and reliability of the system. This paper proposes an isolated three-port converter (TPC) with common low-voltage DC bus which is suitable for DC MGs. The proposed TPC is able to achieve bidirectional power transmission between the high-voltage side and the low-voltage side through the dual active bridge (DAB), while the power conversion of the low-voltage side is consisted of buck-boost converters. The number of power devices of the TPC is reduced by multiplex use of the power devices in the DAB. Meanwhile, interleaved structure is employed to reduce the current ripple at one port on low-voltage side. This paper analyzes the equivalent circuit model of the proposed TPC, then typical operating modes and key waveforms of the converter are presented. The phase-shifting control with duty-cycle adjustment method is adopted to realize bidirectional power transmission among the three ports. Finally, the power transmission characteristics of the TPC are verified by simulation and experimental studies, and the effectiveness of the proposed scheme is verified accordingly.
多端口直流变换器在直流微电网中的应用可以有效地提高系统的集成度和可靠性。本文提出了一种适用于直流mggs的带普通低压直流母线的隔离式三端口变换器(TPC)。所提出的TPC能够通过双有源电桥(DAB)实现高压侧和低压侧之间的双向功率传输,而低压侧的功率转换由降压转换器组成。通过在DAB中复用功率器件,减少了TPC的功率器件数量。同时,采用交错结构减小了低压侧一个端口的电流纹波。本文分析了所提出的TPC等效电路模型,给出了该转换器的典型工作模式和关键波形。采用占空比调整相移控制,实现三端口间的双向电力传输。最后,通过仿真和实验研究验证了TPC的功率传输特性,从而验证了所提方案的有效性。
{"title":"An Isolated Three-Port DC-DC Converter with Low-Voltage DC Bus for DC Microgrids","authors":"Panbao Wang, Xiaochen Zhang, Sibao Ding, Wei Wang, Dianguo Xu","doi":"10.1109/SPEC.2018.8636080","DOIUrl":"https://doi.org/10.1109/SPEC.2018.8636080","url":null,"abstract":"The application of multi-port DC converters in DC microgrids (MGs) can effectively improve the integration and reliability of the system. This paper proposes an isolated three-port converter (TPC) with common low-voltage DC bus which is suitable for DC MGs. The proposed TPC is able to achieve bidirectional power transmission between the high-voltage side and the low-voltage side through the dual active bridge (DAB), while the power conversion of the low-voltage side is consisted of buck-boost converters. The number of power devices of the TPC is reduced by multiplex use of the power devices in the DAB. Meanwhile, interleaved structure is employed to reduce the current ripple at one port on low-voltage side. This paper analyzes the equivalent circuit model of the proposed TPC, then typical operating modes and key waveforms of the converter are presented. The phase-shifting control with duty-cycle adjustment method is adopted to realize bidirectional power transmission among the three ports. Finally, the power transmission characteristics of the TPC are verified by simulation and experimental studies, and the effectiveness of the proposed scheme is verified accordingly.","PeriodicalId":335893,"journal":{"name":"2018 IEEE 4th Southern Power Electronics Conference (SPEC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125963874","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
Capacitor Voltage Shaper for Cascaded H-Bridge StatCom 级联h桥StatCom的电容电压整形器
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635915
Y. Jeon, G. Farivar, C. Townsend, Joung-Hu Park, J. Pou
In this paper, an active shaping method of the capacitor voltage for a cascaded H-bridge (CHB) Iow-capacitance static synchronous compensator (LC-StatCom) is introduced. The traditional LC-StatCom is able to operate with large capacitor voltage ripples when it is operating with rated current. However, as the current is reduced below rated current, voltage ripple on the capacitors decreases. Decreasing the current therefore removes the advantages of the LC-StatCom such as better current quality and reduced switching losses. The active shaping method aims to keep consistent large voltage ripple on the capacitor using a simple boost converter cell to inject an appropriate auxiliary capacitor current. Simulation results are provided to confirm the performance of the proposed CHB-StatCom system.
本文介绍了级联h桥(CHB)低电容静态同步补偿器(LC-StatCom)电容电压的主动整形方法。传统的LC-StatCom在额定电流下工作时,能够在较大的电容电压波动下工作。然而,当电流低于额定电流时,电容器上的电压纹波减小。因此,减小电流会消除LC-StatCom的优点,例如更好的电流质量和更低的开关损耗。主动整形方法的目的是利用简单的升压变换器电池注入适当的辅助电容器电流,在电容器上保持一致的大电压纹波。仿真结果验证了所提CHB-StatCom系统的性能。
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引用次数: 5
Power Sharing Scheme for an Islanded Microgrid Including Renewables and Battery Storage 包含可再生能源和电池存储的孤岛微电网电力共享方案
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635948
Jiahui Jiang, C. Coates
Microgrids provide an effective way to increase renewable energy (RE) penetration level in the power network. The cooperation of renewable microsources, energy storage systems (ESSs) and conventional dispatchable microsources is an important issue in the operation of an islanded microgrid. In this paper, the designed power sharing scheme aims to maximize renewable penetration level by giving RE the priority of power supply. This requires RE to be able to regulate grid voltage rather than only operating under power control mode (PCM) in the conventional way. Droop control strategy is modified to support a microsource operating under both voltage control mode (VCM) and PCM, and switching between both modes automatically. It also enables “peer to peer” and “plug and play” operation of a microgrid. Meanwhile, the characteristics of power sources (photovoltaic and batteries) are considered. DC/DC converter controller is proposed correspondingly with the aim of keeping the system stable. Simulations have been conducted to verify its effectiveness.
微电网为提高可再生能源在电网中的渗透水平提供了有效途径。可再生微源、储能系统和传统可调度微源的合作是孤岛微网运行中的一个重要问题。本文设计的电力共享方案旨在通过赋予可再生能源供电优先权,使可再生能源普及率达到最高。这要求RE能够调节电网电压,而不是仅以传统方式在功率控制模式(PCM)下运行。改进了下垂控制策略以支持微源在电压控制模式(VCM)和PCM下同时工作,并在两种模式之间自动切换。它还可以实现微电网的“点对点”和“即插即用”操作。同时,考虑了电源(光伏和电池)的特性。为了保证系统的稳定,提出了相应的DC/DC变换器控制器。通过仿真验证了该方法的有效性。
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引用次数: 4
Thermal Management of an Electric Ferry Lithium-Ion Battery System 电动渡轮锂离子电池系统的热管理
Pub Date : 2018-12-01 DOI: 10.1109/SPEC.2018.8635922
E. Alston, S. Jayasinghe, C. Baguley, U. Madawala
This paper presents thermal modelling of a Lithium-ion battery module designed to power a fully electric ferry. The operation requirement is to recharge the battery energy storage system within 13 minutes. This presents a thermal management problem with the battery generating excessive heat whilst charging at a rate of 3.45C. To mitigate this problem the battery was analyzed using the ANSYS Fluent software under various cooling methods applied. The results of this analysis revealed that the temperature of the battery can be maintained in the optimal range using an air cooling system.
本文介绍了为全电动渡轮提供动力的锂离子电池模块的热建模。操作要求为电池储能系统在13分钟内充满电。这就出现了一个热管理问题,即电池在3.45摄氏度的充电速率下产生过多的热量。为了解决这一问题,利用ANSYS Fluent软件对不同冷却方式下的电池进行了分析。分析结果表明,采用空气冷却系统可以使电池温度保持在最佳范围内。
{"title":"Thermal Management of an Electric Ferry Lithium-Ion Battery System","authors":"E. Alston, S. Jayasinghe, C. Baguley, U. Madawala","doi":"10.1109/SPEC.2018.8635922","DOIUrl":"https://doi.org/10.1109/SPEC.2018.8635922","url":null,"abstract":"This paper presents thermal modelling of a Lithium-ion battery module designed to power a fully electric ferry. The operation requirement is to recharge the battery energy storage system within 13 minutes. This presents a thermal management problem with the battery generating excessive heat whilst charging at a rate of 3.45C. To mitigate this problem the battery was analyzed using the ANSYS Fluent software under various cooling methods applied. The results of this analysis revealed that the temperature of the battery can be maintained in the optimal range using an air cooling system.","PeriodicalId":335893,"journal":{"name":"2018 IEEE 4th Southern Power Electronics Conference (SPEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114668575","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: 7
期刊
2018 IEEE 4th Southern Power Electronics Conference (SPEC)
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