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2016 IEEE International Conference on Sustainable Energy Technologies (ICSET)最新文献

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A non-isolated converter design with time-multiplexing control topology for un-binned high-power LEDs in parallel operation for off-grid solar-PV streetlamps 离网太阳能光伏路灯并联运行的大功率led非隔离时间复用控制拓扑设计
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811810
R. Kathiresan, Tan Xiong, S. K. Panda, P. Das, T. Reindl
Battery-operated Light Emitting Diodes (LEDs) are often arranged in parallel strings in a lighting fixture due to the high voltage gain required in case of a series type connection. Yet, current sharing is prevalent in the parallel configuration due to the large forward voltage tolerance of high-power LEDs resulting in uneven light output and premature failure when they are “overdriven”. Current-matching techniques in practice involve complexity, high cost and reduced efficiency. In this paper, a Single Inductor Multiple Output (SIMO) parallel string LED driver with time multiplexing control which takes advantage of the inability of the human eye in visual perception of high-frequency operation in order to time-share the operation of individual strings is proposed. This shall greatly reduce the component count and complexity with less than 5% current mismatch. Soft start, dimming and shutdown features are achieved for enabling off-grid solar photovoltaic (PV)-based lighting. Also, the availability of the system is increased by introducing a LED failure protocol which has been validated by simulation and hardware implementation.
由于串联型连接所需的高电压增益,电池供电的发光二极管(led)通常在照明灯具中并联排列。然而,由于大功率led的正向电压容限大,导致光输出不均匀,并且在“过度驱动”时过早失效,电流共享在并联配置中很普遍。实际应用中的电流匹配技术复杂、成本高、效率低。本文提出了一种具有时间复用控制的单电感多输出(SIMO)并联串LED驱动器,该驱动器利用人眼对高频操作的视觉感知能力不足,使单个串的操作时间共享。这将大大减少元件数量和复杂性,电流失配小于5%。软启动、调光和关机功能实现了离网太阳能光伏(PV)照明。此外,通过引入LED故障协议提高了系统的可用性,该协议已通过仿真和硬件实现进行了验证。
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引用次数: 3
Options for emergency control of power grids with high penetration of renewables 可再生能源渗透率高的电网应急控制方案
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811749
T. Vu, K. Turitsyn
Power systems are experiencing a historical transformation in their paradigm and architecture. As such, the classical methods ensuring secure operation of power grids, which are largely developed several decades ago, need to be reassessed. At the same time, new generations of smart electronic devices provide fast actuation to smart power grids. Also, transmission resources are continuously installed into the system and will be ubiquitously available in the future. These assets provide new opportunities for power grids' operation controls. In this paper, we sketches the ideas of viable alternatives for traditional remedial actions of power grids with high penetration of renewables, in which the renewables are integrated with synchronverters to mimic the dynamics of conventional generators and transmission lines are equipped with FACTS devices. In these novel emergency control schemes, the power electronics resources are exploited to control the inertia/damping of the imitated generators as well as the susceptances of transmission lines in order to quickly stabilize the power system under emergency situations. The proposed controls are designed by solving convex optimization problems, making them scalable to large scale power grids. Also, these emergency control schemes can be implemented with minor investment by exploiting the plentiful transmission facilities ubiquitously available on the existing power grids.
电力系统正经历着范式和架构的历史性转变。因此,需要重新评估几十年前发展起来的传统电网安全运行方法。与此同时,新一代智能电子设备为智能电网提供了快速驱动。此外,传输资源不断地安装到系统中,并将在未来无处不在。这些资产为电网的运行控制提供了新的机会。在本文中,我们概述了可再生能源普及率高的电网的传统补救措施的可行替代方案,其中可再生能源与同步器集成以模拟传统发电机的动态,输电线路配备FACTS设备。在这些新型应急控制方案中,利用电力电子资源来控制模拟发电机的惯性/阻尼和输电线路的电纳,以便在紧急情况下快速稳定电力系统。所提出的控制是通过求解凸优化问题来设计的,使其可扩展到大规模电网。此外,这些应急控制方案可以利用现有电网中无处不在的大量输电设施,以较小的投资实施。
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引用次数: 9
Battery charger with small DC-link capacitors for G2V applications 用于G2V应用的小型直流电容电池充电器
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811802
Hoang Vu Nguyen, Yoon-Cheul Jeung, Dong-Choon Lee
In this paper, an AC/DC converter with a small DC-link capacitor for EV chargers is proposed, where a bridgeless PFC (power factor correction) boost rectifier and a full-bridge phase-shifted-modulated DC-DC converter are employed to transfer power from the grid to the electric vehicle. In order to solve the inherent problem of the second-order ripple power in a single-phase AC/DC converter, an auxiliary circuit is added, by which the DC-link capacitor can be reduced significantly. As a result, the bulky electrolytic capacitor can be replaced by a reliable film capacitor. The effectiveness of the proposed method has been verified by simulation results.
本文提出了一种用于电动汽车充电器的具有小型直流链路电容的AC/DC变换器,其中采用无桥PFC(功率因数校正)升压整流器和全桥移相调制DC-DC变换器将电网的功率传输到电动汽车。为了解决单相AC/DC变换器固有的二阶纹波功率问题,增加了辅助电路,大大减小了直流链路电容。因此,笨重的电解电容器可以被可靠的薄膜电容器所取代。仿真结果验证了该方法的有效性。
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引用次数: 5
Study on demand and supply operation using forecasting in power systems with extremely large integrations of photovoltaic generation 基于预测的超大光伏发电集成度电力系统供需运行研究
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811758
T. Masuta, Joao Gari da Silva Fonseca, Hideaki Ootake, A. Murata
The installed capacity of photovoltaic (PV) generation in Japan is currently more than 20 GW. This capacity has been rapidly increasing since the start of the feed-in tariff policy in 2012. The installed capacity after 2030 may be considerably larger than the current supposition if this trend continues. In this study, we conducted numerical simulations of the demand and supply operation with consideration of the unit commitment of conventional power generators using PV generation forecasting in economic-load dispatching control. This operation occurs in power systems with extremely large integrations of PV generation. The impact of PV generation forecasting errors on the demand and supply imbalance is quantitatively evaluated with consideration of the installed PV capacity as a parameter. Simulation results show that the impact of the forecasting errors becomes small for a larger value of the installed PV capacity. The results additionally reveal that efficient use of PV generation is more important in power systems with extremely large integrations of PV generation.
目前,日本的光伏发电装机容量超过20吉瓦。自2012年开始实施上网电价政策以来,这一产能一直在迅速增加。如果这一趋势持续下去,2030年后的装机容量可能会大大超过目前的假设。本文将光伏发电预测应用于经济负荷调度控制中,对考虑常规发电机组负荷的供需运行进行了数值模拟。这种操作发生在光伏发电集成度极高的电力系统中。以光伏装机容量为参数,定量评价了光伏发电预测误差对供需失衡的影响。仿真结果表明,光伏装机容量越大,预测误差的影响就越小。结果还表明,在光伏发电集成度极高的电力系统中,光伏发电的有效利用更为重要。
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引用次数: 13
Design of a bi-directional DC-DC converter for Solid-State Transformer(SST) application by exploiting the shoot through mode 利用透射模式设计一种用于固态变压器的双向DC-DC变换器
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811795
K. Alam, L. Tria, Daming Zhang, M.F. Rahman
This paper concerns the design of a Solid-State Transformer (SST) based grid integrated battery charger with an isolated bi-directional dc-dc converter to maintain the overall system competitiveness. The proposed full bridge DC-DC converter exploits the shoot through mode in the V2G mode for the boosting purpose, which is the uniqueness of the proposed topology. The inclusion of SST in the design can exhibit substantially compact size and other potential functions such as reactive power flow control, bi-directional power flow etc. The design of the high frequency transformer along with the electrical equivalent circuit obtained from FEA analysis is presented, which is one of the key contributions of this paper. As a proof of concept, simulation results obtained from Matlab-Simulink tools are presented. In summary, design considerations in building the SST based DC-fast charger in a 1-kW power level are presented which can be scaled up to the desired power level according to the requirements.
本文研究了一种基于固态变压器(SST)的电网集成电池充电器的设计,该充电器具有隔离的双向dc-dc转换器,以保持整个系统的竞争力。所提出的全桥DC-DC变换器利用V2G模式下的通射模式进行升压,这是所提出拓扑结构的独特性。在设计中加入SST可以显示出非常紧凑的尺寸和其他潜在的功能,如无功潮流控制,双向潮流等。给出了高频变压器的设计方案,并通过有限元分析得到了等效电路,这是本文的重要贡献之一。作为概念验证,给出了Matlab-Simulink工具的仿真结果。综上所述,在构建基于SST的直流快速充电器时,提出了在1 kw功率水平下的设计考虑因素,可以根据需求扩展到所需的功率水平。
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引用次数: 3
SVPWM method for dual indirect matrix converter with zero-common mode voltage 零共模电压双间接矩阵变换器的SVPWM方法
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811775
D. Tuyen, T. T. Vu, V. Phan, P. Q. Dzung
In this paper, a SVPWM for an indirect matrix converter (IMC) with dual output inverter has been proposed to eliminate the common-mode voltage (CMV). The presented converter is a combination of the conventional rectifier stage and a dual inverter stage for feeding open-end winding load. The principles of selecting suitable active vectors and zero vectors and then properly arranging the switching sequence in the dual inverter stage are described to eliminate the CMV and to obtain the zero current commutation. The dual inverter IMC with the new SVPWM method significantly eliminates the CMV without any extra hardware. The simulation results are shown to demonstrate that the new SVM method can generate good performance of the input/output waveforms and to provide CMV elimination.
本文提出了一种用于双输出间接矩阵变换器的SVPWM,以消除共模电压(CMV)。该变流器是传统整流级和双逆变级的结合,用于给开端绕组负载供电。阐述了在双逆变级中选择合适的有源矢量和零矢量并合理安排开关顺序的原则,以消除CMV,实现零电流换流。采用新的SVPWM方法的双逆变器IMC在不增加任何硬件的情况下显著消除了CMV。仿真结果表明,该方法能产生良好的输入/输出波形,并能消除CMV。
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引用次数: 1
Comparison of two level PWM and three level PWM in Dual Active Bridge converter 双有源桥式变换器中二电平PWM与三电平PWM的比较
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811801
Yuki Nishiya, N. D. Dinh, G. Fujita
This paper proposes a new switching method to increase the efficiency in Dual Active Bridge converter (DAB). Two level PWM is general method but the efficiency is lower than three level PWM. In this paper, three level inverter is applied in DAB and the efficiency is compared two level PWM. The power loss of MOSFET checked and the power loss with three level PWM is expected to lower loss. The dead-time is controlled for generating three level voltage. Through a simulation and an experiment, the proposed switching method is compared the conventional switching method.
为了提高双有源桥式变换器(DAB)的效率,提出了一种新的开关方法。二电平PWM是常用的方法,但效率低于三电平PWM。本文将三电平逆变器应用于DAB,并对两电平PWM的效率进行了比较。检查了MOSFET的功率损耗,并期望三电平PWM的功率损耗能够降低损耗。通过控制死区时间来产生三电平电压。通过仿真和实验,将所提出的开关方法与传统的开关方法进行了比较。
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引用次数: 0
Review of smart grid requirements and design standards for future Naval vessels 审查未来海军舰艇的智能电网要求和设计标准
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811806
S. Nadarajan, A. Gupta, S. K. Panda
In this paper, the SMART grid concepts and technology that can be potentially applied to address key challenges in future Naval vessels are analyzed. The IEEE standards for designing various modules for naval vessels such as Integrated Power System (IPS) are discussed and proposed potential architecture for power management module in naval vessel IPS to supply SMART grid concepts.
在本文中,分析了智能网格概念和技术,这些概念和技术可以潜在地应用于解决未来海军舰艇的关键挑战。讨论了集成电源系统(Integrated Power System, IPS)等舰船电源管理模块设计的IEEE标准,提出了集成电源管理模块的潜在架构,以实现智能电网概念。
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引用次数: 2
Using double Fed induction generator to enhance voltage stability and solving economic issue 采用双馈感应发电机,提高电压稳定性,解决经济问题
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811813
N. H. Hieu, L. H. Lam
Traditionally, ancillary market is supported by a lot of conventional generators to produce or use reactive power with the purpose enhance voltage stability. However, in recently years, with the penetration of new wind generations (Double Fed Induction Generator (DFIG) and Direct Drive Synchronous Generator (DDSG)) and through different set of control possibility, wind power plants are able to partly participate in the provision of the ancillary market for control frequency and voltage. However, economic issue is one of a particular big challenge. Therefore, this paper study the method to calculate the price of reactive power with the purpose support wind farm provide reactive power in order to increase voltage stability for power system based on locational marginal price. This study used the Power World Program to simulate wind generator (DFIG) and calculate the locational marginal price. A sample wscc_9bus_Wind-DFIG is used to show the change of benefit of wind generator when the increasing load is applied.
传统上,辅助市场是由大量的常规发电机来生产或使用无功功率,以提高电压稳定性。然而,近年来,随着新型风力发电机组(双馈感应发电机(DFIG)和直驱同步发电机(DDSG))的普及,通过不同的控制方式,风电场能够部分参与到控制频率和电压的辅助市场供给中。然而,经济问题是其中一个特别大的挑战。因此,本文研究了基于位置边际电价的无功电价计算方法,目的是支持风电场提供无功,以提高电力系统电压稳定性。本研究利用Power World程序对风力发电机(DFIG)进行模拟,并计算其区位边际电价。以wscc_9bus_Wind-DFIG为例,分析了增大负荷时风力发电机组效益的变化情况。
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引用次数: 5
Distributed intelligence: Unleashing flexibilities for congestion management in smart distribution networks (Invited paper) 分布式智能:在智能配电网络中释放拥塞管理的灵活性(特邀论文)
Pub Date : 2016-11-01 DOI: 10.1109/ICSET.2016.7811819
A. Haque, T. Vo, P. Nguyen
Electrical distribution networks worldwide are facing frequent capacity challenges due to the widespread roll out of various distributed energy resources (DERs). A number of demand response (DR) mechanisms have been developed in order to circumvent the problems and enhance the flexibility of the distribution network. While the existing centralized control system remains its crucial role for reliable and secure grid operation, distributed intelligence is a complement technology with a focus on dividing the control task into a number of simpler problems and solve them with minimum exchange of information. Based on the recent developments of distributed intelligence, this paper discusses a decentralized approach to enable demand response for managing the congestions more efficiently. The approach is validated with simulations for representative Dutch low-voltage (LV) networks.
由于各种分布式能源(DERs)的广泛推广,世界范围内的配电网面临着频繁的容量挑战。为了规避这些问题,提高配电网的灵活性,一些需求响应机制已经被开发出来。现有的集中控制系统对电网的安全可靠运行仍然起着至关重要的作用,而分布式智能是一种补充技术,其重点是将控制任务划分为许多更简单的问题,并以最少的信息交换来解决这些问题。基于分布式智能的最新发展,本文讨论了一种分散的方法来实现更有效地管理拥堵的需求响应。通过对荷兰低压电网的仿真验证了该方法的有效性。
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引用次数: 8
期刊
2016 IEEE International Conference on Sustainable Energy Technologies (ICSET)
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