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2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA)最新文献

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Control and implementation of back to back grid converters utilizing IEEE 519 基于ieee519的背靠背电网变换器的控制与实现
Sean Cunningham, A. Nasiri
This work presents a back to back converter topology with the ability to connect two power systems of different voltages and frequencies for the exchange of power. By utilizing indirect AC to AC conversion decoupling is achieved between the power systems with one of three phase, two level voltage source converters performing the AC to DC conversion that maintains the required DC bus voltage level at unity power factor while the other converter operates in all four quadrants supplying and or consuming active and or reactive power with the other power system. The prototype implementation resides at University of Wisconsin Milwaukee's USR building microgrid test bed facility with an emphasis in the design to approach the requirements for harmonic control as recommended by IEEE 519 without power filtering AC capacitors.
这项工作提出了一个背靠背的转换器拓扑结构,能够连接两个不同电压和频率的电力系统进行电力交换。通过利用间接交流到交流转换,在电力系统之间实现了解耦,其中一个三相,两个电平电压源转换器执行交流到直流转换,保持所需的直流母线电压水平在单位功率因数,而另一个转换器在所有四个象限中运行,为其他电力系统提供和/或消耗有功和/或无功功率。原型实现位于威斯康星大学密尔沃基分校的USR建筑微电网测试平台设施中,重点是设计接近IEEE 519推荐的谐波控制要求,而不需要功率滤波交流电容器。
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引用次数: 3
Super twisting sliding mode control of smart-inverters grid-connected for PV applications 光伏并网智能逆变器的超扭滑模控制
Del Pizzo Andrea, Di Noia Luigi Pio, Meo Santolo
In this paper, it is proposed a robust Second-Order Super-Twisting Sliding Mode Control for a Grid-connected inverter of a PV power plant. The proposed control strategy is able to maximize the energy extracted from the PV while regulating the DC-link voltage and achieving a power factor compensation and the reduction of currents harmonic distortion. Both in balanced or unbalanced condition, the grid is supplied by the PV plant with the desired active power and with the developed strategy, it is possible to use the inverter as a reactive power compensator. In order to prove the goodness of the proposed algorithm in terms of high efficiency and performance, some simulated and experimental results are carried out.
针对光伏电站并网逆变器,提出了一种鲁棒二阶超扭转滑模控制方法。所提出的控制策略能够在调节直流电压的同时最大限度地从光伏发电中提取能量,并实现功率因数补偿和电流谐波畸变的降低。无论在平衡或不平衡状态下,电网都由光伏电站提供所需的有功功率,并且通过开发的策略,可以使用逆变器作为无功补偿器。为了证明所提出的算法在效率和性能方面的优点,进行了一些仿真和实验结果。
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引用次数: 25
Active power limiter for grid connection of modern renewable SSG SPC 现代可再生SSG SPC并网有功限电器
M. Abdollahi, J. I. Candela, J. Rocabert, R. Aguilar, P. Rodríguez
Management of Renewable Static Synchronous Generation units based on Synchronous Power Controller (RSSG-SPC), not only provides grid synchronization without using PLL and gives proper dynamic to output active power, moreover yields simple solution to overcome technical constraints on these units. Control of active power level injected to the grid is one of these key constraints which can overcome by an Active Power Limiter (APL). In this work, an APL designed based on the classic power equation is proposed for this kind of modern RSSG-SPCs. Primary Simulink analysis and real time test results confirm that suggested APL can control and limit both maximum and minimum level of output active power for several grid connection cases.
基于同步功率控制器(RSSG-SPC)的可再生静态同步发电机组的管理,不仅在不使用锁相环的情况下实现电网同步,使输出有功功率具有适当的动态性,而且为克服可再生静态同步发电机组的技术限制提供了简单的解决方案。注入电网的有功功率电平的控制是有功功率限制器(APL)可以克服的关键约束之一。本文提出了一种基于经典功率方程的现代RSSG-SPCs的APL设计方法。初步的Simulink分析和实时测试结果证实,APL可以控制和限制几种并网情况下输出有功功率的最大和最小水平。
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引用次数: 4
Experimental verification on a switched reluctance motor driven by asymmetric flying capacitor multilevel h-bridge inverter 非对称飞电容多电平h桥逆变器驱动开关磁阻电机的实验验证
N. Yamada, N. Hoshi
An asymmetric flying capacitor multilevel H-bridge inverter has proposed as a drive circuit for switched reluctance motors. The flying capacitor multilevel H-bridge inverter uses many power semiconductor devices. In addition, two capacitors are used per phase in the inverter, although only one capacitor is required at applying 5-level voltage to the stator windings in an SRM. Therefore, the authors have proposed a novel asymmetric flying capacitor multilevel H-bridge inverter. This paper demonstrates through experiments that the proposed inverter is possible to output the same voltage levels as the conventional circuit during excitation interval. Moreover, the vibration characteristics of a switched reluctance motor are evaluated when the current hysteresis control is applied with the proposed circuit.
提出了一种非对称飞电容多电平h桥逆变器作为开关磁阻电机的驱动电路。飞电容多电平h桥逆变器采用多种功率半导体器件。此外,逆变器中每相使用两个电容器,尽管在SRM中对定子绕组施加5级电压时只需要一个电容器。为此,作者提出了一种新型的非对称飞电容多电平h桥逆变器。通过实验证明,该逆变器可以在励磁间隔内输出与传统电路相同的电压水平。此外,本文还对采用该电路进行电流滞回控制时的开关磁阻电机振动特性进行了评估。
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引用次数: 10
Urban sets innovation: Design of a solar tree PV system for charging mobile devices in Medellin — Colombia 城市设置创新:为哥伦比亚麦德林的移动设备充电的太阳能树PV系统设计
E. Duque, A. Isaza, P. Ortiz, S. Chica, A. Lujan, J. Molina
This paper shows the design of a solar tree PV system for charging mobile devices on open urban areas. The solar unit tree was designed according to the environmental conditions of Medellin. Based on the electric consumption calculations of mobile devices, a 3.5 m height-tree was built. It has four leaves made of acrylic with solar panels on the top (SOW sized 54 × 83.2 cm). It illuminates with cold white lights and four smaller leaves with green illumination. The energy storage capacity is 180 Amp. It has 6 USB ports to connect mobile devices and two 110V-200 W electrical outlets to connect those devices to the electricity. Finally, the photovoltaic system's availability to satisfy the energetic requirements was verified. This research found that according to the established design variables, the system has a 3-hour autonomy on saturation and involves an energy saving of 876 Wh in a year of operation.
本文介绍了一种用于城市开阔地区移动设备充电的太阳能树式光伏系统的设计。根据麦德林的环境条件设计了太阳能单元树。根据移动设备的耗电量计算,搭建了一棵3.5 m高的树。它有四片由丙烯酸制成的叶子,顶部有太阳能电池板(SOW尺寸为54 × 83.2厘米)。它用冷白色的灯和四片绿色的小叶子照明。储能容量为180安培,有6个USB接口连接移动设备,两个110v - 200w电源插座连接移动设备。最后,验证了光伏系统满足能量需求的有效性。本研究发现,根据既定的设计变量,该系统具有3小时的饱和自主性,运行一年可节约电量876 Wh。
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引用次数: 16
Design of inductively coupled power transfer systems with series-parallel compensation frameworks 带串并联补偿框架的电感耦合电力传输系统设计
Dongyu Li, H. Wen, Guanying Chu
This paper presents an inductively coupled power transfer (ICPT) system that can transfer energy with high efficient from primary side to secondary side with variable load from 50 to 300 Ω via electromagnetic resonant coupling and output stable voltage. Main reasons for low efficiency for wide frequency deviation have been investigated. Typical compensation structures are compared in terms of efficiency, and load range. The series-parallel compensation framework is adopted to keep both side coils work in resonant condition and output maximum voltage. A practical ICPT prototype was conducted and the performance with different compensation networks were compared experimentally. Simulation and experimental results are illustrated to show the stability and effectiveness of this inductively coupled transfer system.
本文提出了一种电感耦合功率传输系统,该系统通过电磁谐振耦合和输出稳定电压,可以在负载为50 ~ 300 Ω的情况下,将电能从一次侧高效地传递到二次侧。分析了宽频差导致效率低下的主要原因。比较了典型补偿结构的效率和负载范围。采用串并联补偿框架,使两侧线圈工作在谐振状态,输出最大电压。设计了一种实用的ICPT样机,并对不同补偿网络的性能进行了实验比较。仿真和实验结果表明了该系统的稳定性和有效性。
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引用次数: 6
Single and interleaved split-pi DC-DC converter 单和交错分路pi DC-DC转换器
Ahmad Alzahrani, P. Shamsi, M. Ferdowsi
This paper presents analysis, design, and implementation of the high-frequency split-pi converter. Split-Pi converter has distinctive features like the symmetry of the input and the output components. Also, the continuity of the input and output currents makes this converter more desirable in applications like electric vehicles and power management. Split-pi converter is a bi-directional voltage-fed input voltage-fed output converter. As most of the renewable sources are naturally voltage sources, this converter is very suitable for interfacing such sources. With interleaved split-pi converter can have smooth input current and output currents. The converter is simulated, and details of voltage and current stresses of the components are illustrated. A 100 W hardware prototype is designed and implemented experimentally to verify the analysis and the design. The switches were implemented using GaN-based switches to allow operating at high frequency.
本文介绍了高频分频pi变换器的分析、设计和实现。Split-Pi转换器具有输入和输出分量对称等特点。此外,输入和输出电流的连续性使该转换器在电动汽车和电源管理等应用中更受欢迎。分路pi变换器是一种双向电压馈送输入电压馈送输出变换器。由于大多数可再生能源都是天然的电压源,因此该转换器非常适合连接这些电源。采用交错式分路pi变换器,可以实现平稳的输入电流和输出电流。对变换器进行了仿真,并详细说明了元件的电压和电流应力。设计了一个100w的硬件样机,并进行了实验验证。该开关采用基于gan的开关实现,允许在高频下工作。
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引用次数: 10
Capacitor banks contribution to arc-flash applications to solar and wind farm substations 电容器组对太阳能和风力发电厂变电站电弧闪弧应用的贡献
E. Enrique, S. Moser, Timothy P. Bailey
IEEE Std. 1584 specifies that capacitors must be part of the arc-flash study. The software tools generally adopted for analytical studies are not suitable for the calculation of the arc-fault incident energy in the presence of capacitor banks. The reason for this deficiency is that the model of the electrical network is only valid for the analysis of short circuit currents at the fundamental frequency. The frequency of the outburst current from a capacitor bank is determined by the size of the capacitors and the impedance of the conductors connecting the capacitor bank to the fault. Given the large power ratings of capacitor banks at the substation of solar and wind farms, it is important to develop a method to determine the maximum contribution from these capacitor banks to the arc-flash incident energy.
IEEE标准1584规定电容器必须是电弧闪光研究的一部分。分析研究中常用的软件工具不适用于电容器组存在时的电弧故障入射能量的计算。造成这种缺陷的原因是,电网模型只适用于分析基频下的短路电流。电容器组爆发电流的频率由电容器的大小和连接电容器组到故障点的导体的阻抗决定。鉴于太阳能和风力发电场变电站电容器组的额定功率很大,开发一种方法来确定这些电容器组对弧闪入射能量的最大贡献是很重要的。
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引用次数: 4
Detuning of harmonic resonant modes in accordance with IEEE 519 standard in an exemplary north american distribution system with PV and wind 在一个典型的北美光伏和风能配电系统中,根据IEEE 519标准对谐波谐振模式进行失谐
S. Rangarajan, E. R. Collins, J. C. Fox
The increase in penetration levels of distributed generators like PV and Wind in a distribution system makes the IEEE 519 standard to be a vital aspect towards power quality. The network resonance has been described by IEEE 519 as a major contributor towards the harmonic distortion. Non-linear loads such as transformers, machines, silicon-controlled rectifiers (SCRs), solid state devices, power transistors, microprocessors and computers also contribute towards the injection of harmonics into a distribution system. The interaction between all kinds of elements of distribution systems and inverter based distributed generators like PV and Wind impacts the resonance modes to a definite extent. Based on the harmonic levels from the components in the system, the paper brings out a contribution in the form of a detuning methodology applied to a practical system to eliminate the harmonics. This would further serve as a recommendation for all the utility personnel and researchers. An exemplary North American system has been considered for the study towards detuning process. The phenomenon of resonance and harmonic issues has been inspired from a real situation due to capacitor switching towards power factor correction associated with an induction motor operating as an industrial load. Normally detuning is done on the capacitor banks when non-linear loads are active contributors to harmonics. Nowadays with more renewable penetration, this paper explores the observation during the interaction of renewables with the rest of the elements and an effective solution in the form of detuning to eliminate it is presented.
分布式发电机如光伏和风能在配电系统中的渗透程度越来越高,这使得IEEE 519标准成为电力质量的一个重要方面。IEEE 519将网络共振描述为谐波失真的主要原因。非线性负载,如变压器,机器,硅控整流器(scr),固态器件,功率晶体管,微处理器和计算机也有助于向配电系统注入谐波。配电系统各组成部分与光伏、风能等基于逆变器的分布式发电机组之间的相互作用对其谐振模式有一定的影响。基于系统中各分量的谐波水平,本文提出了一种应用于实际系统的失谐方法来消除谐波。这将进一步成为所有公用事业人员和研究人员的建议。对失谐过程的研究考虑了一个典型的北美系统。谐振现象和谐波问题的灵感来自于一个真实的情况,由于电容切换到功率因数校正与感应电机作为工业负载运行有关。当非线性负载是谐波的主动贡献者时,通常对电容器组进行失谐。在可再生能源越来越普及的今天,本文探讨了可再生能源与其他元素相互作用时的观察,并提出了一种以失谐形式消除它的有效解决方案。
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引用次数: 14
Generation frequency support by renewable SSG SPC unit on interconnected areas 可再生SSG SPC单元在互联区域的发电频率支持
M. Abdollahi, J. I. Candela, J. Rocabert, R. Aguilar, P. Rodríguez
Supporting frequency inside of each generation area as well as keeping proper synchronism condition between interconnected areas are two main challenges for grid operators. In this paper, after analysis of structure of Renewable Static Synchronous Generation unit based on Synchronous Power Controller (RSSG-SPC) for holding and control of frequency, it is shown that how a renewable unit based on SPC can contribute to frequency support inside of generation areas and in this way it will support synchronism of neighbor areas. Results of mathematical analysis and state space modelling, as well as time domain investigation then real time test of two area system in presence of RSSG-SPC confirm that by reducing Rate of Change of Frequency (ROCOF), increasing level of Frequency Nadir (FN) and providing stiffer Center Of Inertia (COI) for whole of the grid, the RSSG-SPC not only supports frequency on the generation areas, furthermore it will cover synchronism of these interconnected areas.
电网运营商面临的两大挑战是如何保证各发电区域内部的频率支持以及各互联区域之间保持适当的同步状态。本文通过对基于同步功率控制器(RSSG-SPC)的可再生静态同步发电机组的结构进行分析,分析了基于同步功率控制器的可再生静态同步发电机组对频率的保持和控制,说明了基于同步功率控制器的可再生静态同步发电机组如何在发电区域内提供频率支持,从而支持邻近区域的同步。数学分析、状态空间建模、时域调查和实时测试结果表明,通过降低频率变化率(ROCOF)、提高频率下限(FN)水平和为整个电网提供更强的惯性中心(COI), RSSG-SPC不仅支持发电区域的频率,而且还将覆盖这些互联区域的同步。
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引用次数: 6
期刊
2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA)
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