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2015 IEEE Electrical Power and Energy Conference (EPEC)最新文献

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Improved control strategy of full-bridge modular multilevel converter 全桥模块化多电平变换器的改进控制策略
Pub Date : 2015-10-26 DOI: 10.1109/EPEC.2015.7379971
G. Adam
This paper describes a control approach that allows the cell capacitors of the full-bridge modular multilevel converter (FB-MMC) to be controlled independent of dc link voltage. Also the control approach offers the possibility of operating the FB-MMC from bi-polar dc link voltages; thus, creating new possibilities for building generic hybrid dc grids with reversible dc link voltage, where conventional line commutated current source converters can operate in conjunction with voltage source converters. Additionally the control approach improves dc fault ride-through of the FB-MMC compared with existing approaches. This is achieved by active control of the arm currents and cell capacitor voltages, and exploitation of the FB-MMC redundant switch states. FB-MMC operation with reversible DC link voltage and decoupled control of the cell capacitor voltages from the dc link voltage are demonstrated using simulations.
本文介绍了一种控制方法,使全桥模块化多电平变换器(FB-MMC)的单元电容器可以独立于直流链路电压进行控制。此外,控制方法提供了从双极直流链路电压操作FB-MMC的可能性;因此,为建立具有可逆直流链路电压的通用混合直流电网创造了新的可能性,在这种情况下,传统的线路换向电流源转换器可以与电压源转换器一起工作。此外,与现有控制方法相比,该控制方法提高了FB-MMC的直流故障通过率。这是通过主动控制臂电流和电池电容器电压,并利用FB-MMC冗余开关状态来实现的。通过仿真演示了具有可逆直流链路电压的FB-MMC操作以及对电池电容电压与直流链路电压的解耦控制。
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引用次数: 3
Comparison between numerical and analytical methods of AC resistance evaluation for Medium Frequency Transformers: Validation on a prototype 中频变压器交流电阻数值计算方法与解析方法的比较:样机验证
Pub Date : 2015-10-26 DOI: 10.1109/EPEC.2015.7379938
A. Pereira, Bruno Lefebvre, F. Sixdenier, M. Raulet, Noël, Burais
In the future, Medium Frequency Transformers (MFT with a frequency range 5 kHz to 100 kHz) will be major components in DC-DC converter applications, for both Medium Voltage Direct Current (MVDC) and High Voltage Direct Current (HVDC) networks. Importantly, the corresponding power losses should be accurately calculated in order to reach performance targets (very high efficiency). This paper reviews the most known analytical models which are used to calculate the medium frequency resistance for several winding technologies. In order to qualify these models in a future design flow, we compare the analytical model results with measurements and 3D finite element (3DFE) electromagnetic simulations. The adopted design flow-chart has been tested on a 17 kHz - 180 kVA prototype transformer that will be used in a Dual Active Bridge (DAB).
在未来,中频变压器(MFT频率范围为5 kHz至100 kHz)将成为中压直流(MVDC)和高压直流(HVDC)网络中DC-DC转换器应用的主要部件。重要的是,应准确计算相应的功率损耗,以达到性能目标(非常高的效率)。本文综述了几种绕组技术中频电阻的常用分析模型。为了在未来的设计流程中验证这些模型,我们将分析模型结果与测量和3D有限元(3DFE)电磁模拟进行了比较。所采用的设计流程图已在将用于双有源电桥(DAB)的17 kHz - 180 kVA原型变压器上进行了测试。
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引用次数: 7
RF planning of multi-cell, metropolitan-area networks 多小区城域网的射频规划
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379990
M. Georgiev, M. Bakr, Shirook M. Ali, N. Al-Mutawaly
A software framework for optimization of multiple base stations in a large-scale network is presented. It is designed for use in WiMAX systems operating in the 1.8-GHz band, reserved for Canadian utilities. The proposed algorithm makes use of the Longley-Rice irregular terrain model (ITM) version 3.0, as provided by the Federal Communications Commission (FCC), to compute path loss. The framework is flexible with regard to the choice of optimization algorithm, constraints, choice of parameters, variants of the ITM path-loss model and terrain generation. The design is unique to the extent that it is highly modular, allowing for straightforward substitution of the aforementioned components. The simulation makes use of high-resolution topographic data provided publicly by NASA's Shuttle Radar Topography Mission.
提出了一种用于大规模网络中多基站优化的软件框架。它设计用于1.8 ghz频段的WiMAX系统,该频段为加拿大公用事业公司保留。该算法使用美国联邦通信委员会(FCC)提供的Longley-Rice不规则地形模型(ITM) 3.0版本来计算路径损失。该框架在优化算法的选择、约束条件的选择、参数的选择、ITM路径损失模型的变体和地形生成等方面具有灵活性。设计的独特之处在于它是高度模块化的,允许直接替换上述组件。模拟使用了美国宇航局航天飞机雷达地形任务公开提供的高分辨率地形数据。
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引用次数: 1
Gauss-Seidel iteration based parameter estimation for a single diode model of a PV module 基于高斯-赛德尔迭代的光伏组件单二极管模型参数估计
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379963
S. Shongwe, M. Hanif
Photovoltaic (PV) modeling plays a vital role in the estimation of the expected yield from a PV generation plant. The single diode model of a PV module requires estimation of 5 unknown parameters derived from the equivalent circuit using only the parameters extracted from datasheets as input. These parameters are used to evaluate the current and voltage from the module under varying conditions of temperature and irradiance. This paper presents the Gauss-Seidel method in a step by step manner to extract the 5 unknown STC parameters used in a single diode PV model with series and shunt resistances. These parameters are then used to plot the I-V characteristics of two PV modules, SQ80 and the GEPV110 under varying temperature and irradiance. Algorithm of the Matlab code used for implementation of the model is presented. The results are then verified by simulations using graphs extracted from the datasheet of the GEPV110 as well as plots from experimentally measured values for the SQ80 PV module.
光伏(PV)建模在光伏电站预期发电量的估算中起着至关重要的作用。光伏组件的单二极管模型需要估计来自等效电路的5个未知参数,仅使用从数据表中提取的参数作为输入。这些参数用于评估在不同温度和辐照度条件下模块产生的电流和电压。本文采用高斯-塞德尔方法逐级提取具有串联电阻和并联电阻的单二极管PV模型中的5个未知STC参数。然后使用这些参数绘制两个光伏组件SQ80和GEPV110在不同温度和辐照度下的I-V特性。给出了实现该模型的Matlab代码算法。然后通过使用从GEPV110数据表中提取的图形以及从SQ80 PV模块的实验测量值中提取的图形进行仿真验证结果。
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引用次数: 15
A bi-directional single-stage isolated AC-DC converter for EV charging and V2G 用于电动汽车充电和V2G的双向单级隔离AC-DC变换器
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379924
Behnam Koushki, A. Safaee, P. Jain, A. Bakhshai
In this paper, to achieve a compact and efficient bidirectional AC-DC converter for an electric vehicle, a single-stage topology with 6 switches is used. The topology utilizes two half-bridge circuits and a series resonant LC circuit. The topology reduces the cost and its volume by having a low number of switches. A control method utilizing the duty-cycle of two half-bridge circuits and the phase-shift between them is proposed. The control method guarantees ZVS for all the switches and optimizes the efficiency. Analysis of the circuit, design and optimal control is described. Simulation to verify the theory is carried out with PSIM.
为了实现一种紧凑高效的电动汽车双向AC-DC变换器,本文采用了具有6个开关的单级拓扑结构。该拓扑结构采用两个半桥电路和一个串联谐振LC电路。这种拓扑结构通过减少交换机数量来降低成本和体积。提出了一种利用两个半桥电路的占空比和它们之间相移的控制方法。该控制方法保证了所有开关的零电压,优化了效率。介绍了电路的分析、设计和最优控制。利用PSIM进行了仿真验证。
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引用次数: 16
A basic load following control strategy in a direct load control program 直接负荷控制程序中的一种基本负荷跟随控制策略
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379973
M. Shaad, C. Diduch, M. Kaye, L. Chang
Use of sustainable energies such as wind is constantly increasing. However, integrating wind energy with the grid tends to reduce the reliability of the system due to the intermittency of the wind. Direct load control (DLC) is one solution to balance consumption with generation. Domestic electric water heaters (DEWHs) are feasible candidate for this purpose because they hold a large share of the aggregated load and follow a similar daily profile. This paper presents a novel load control strategy based on load forecast which provides an estimation on the ramp-up/down reserve capacity. The proposed controller was deployed on a pilot project called PowerShift Atlantic. This project is lead by Canadian Maritime utilities that demonstrates direct load control strategies to provide up to 20MW of ancillary services by controlling various load classes. This paper presents the control strategy implemented in this system along with the experimental results.
风能等可持续能源的使用在不断增加。然而,由于风能的间歇性,将风能并入电网往往会降低系统的可靠性。直接负荷控制(DLC)是平衡用电与发电的一种解决方案。家用电热水器(DEWHs)是可行的候选者,因为它们占总负荷的很大一部分,并且遵循类似的日常概况。本文提出了一种基于负荷预测的负荷控制策略,该策略提供了对爬升/下降备用容量的估计。该控制器被部署在一个名为PowerShift Atlantic的试点项目中。该项目由加拿大海事公用事业公司牵头,通过控制各种负载等级,演示了直接负载控制策略,以提供高达20MW的辅助服务。本文给出了该系统所实现的控制策略以及实验结果。
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引用次数: 10
Enhancing stability simulation for NERC Reliability Standard TPL-001-4 compliance 增强NERC可靠性标准TPL-001-4合规的稳定性仿真
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379965
Y. Zhu, D. Brown
On October 17, 2013, the Federal Energy Regulatory Commission (FERC) approved the North American Electric Reliability Corporation (NERC) Reliability Standard for transmission planning, TPL-001-4. With respect to transient stability assessment, TPL-001-4 requires more extensive annual assessments, establishment of criteria for transient stability, simulation of actual actions of protective relays and Special Protection Systems (SPS), inclusion of protection system failure and relay failure contingencies, and criteria or methodology for identification of system instability such as cascading, voltage instability, or uncontrolled islanding. To comply with this new Reliability Standard, several aspects of transient stability study need to be enhanced: (1) selection of study cases, and of contingencies potentially causing reliability violations or producing more severe system impacts including cascading; (2) inclusion of actual actions of protection systems and SPS; (3) automation of procedure to identify transient stability violations based on the established criteria; and (4) mechanism for identifying and simulating cascading.
2013年10月17日,美国联邦能源监管委员会(FERC)批准了北美电力可靠性公司(NERC)输电规划可靠性标准TPL-001-4。关于暂态稳定性评估,TPL-001-4要求更广泛的年度评估,建立暂态稳定性标准,模拟保护继电器和特殊保护系统(SPS)的实际动作,包括保护系统故障和继电器故障事故,以及识别系统不稳定性的标准或方法,如级联,电压不稳定或不受控制的孤岛。为了符合这个新的可靠性标准,暂态稳定研究的几个方面需要加强:(1)研究案例的选择,以及可能导致可靠性违规或产生更严重系统影响(包括级联)的突发事件的选择;(2)纳入保护系统和SPS的实际行动;(3)基于既定标准识别暂态稳定违规行为的程序自动化;(4)级联识别与模拟机制。
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引用次数: 2
Analysis of switching converters with type 3 compensator using ripple-based control 基于纹波控制的3型补偿开关变换器分析
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379981
Hikaru Kujirada, K. Nakamoto, Terukazu Sato
This paper presents small signal analysis of dc-dc converters with ripple-based control. A simple and adaptable method for the analysis of ripple-based converter is introduced. A buck converter with ripple-based control is analyzed as an example. A prototype converter is implemented and the presented experimental results confirm the validity of theoretical analysis. From the results, it is clarified that the controller has the characteristics of a type 3 compensator. Also, it is shown that the converter has good dynamic performance for the step load change.
本文介绍了基于纹波控制的dc-dc变换器的小信号分析。介绍了一种简单、适应性强的分析纹波变换器的方法。以一种基于纹波控制的降压变换器为例进行分析。实验结果证实了理论分析的有效性。结果表明,该控制器具有3型补偿器的特性。结果表明,该变换器对负载的阶跃变化具有良好的动态性能。
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引用次数: 0
Multilevel STATCOM with power intensive energy storage for dynamic grid stability - frequency and voltage support 多级STATCOM具有功率密集型能量存储,用于动态电网稳定,频率和电压支持
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379930
E. Spahić, Charlie Paul Susai Sakkanna Reddy, M. Pieschel, R. Álvarez
The developing political and environmental reforms are driving the rapid evolution of today's power systems. There is a steady increase in the electrical energy being fed from renewable energy sources like wind and photovoltaic systems while shutting down large thermal power plants. This trend has a major impact on the performance of the electrical power system networks especially with respect to their dynamic behaviour. Phasing out of existing conventional synchronous generators will adversely affect auxiliary services like voltage control and frequency regulation. The paper discusses one of the solutions to cope with these challenges: the use of Modular Multilevel Converter based STATCOM i.e. SVC PLUS® with power intensive energy storage (SVC PLUS ES) which can significantly contribute to the stable operation of the power system. The successful frequency and voltage support in transmission grids will be presented. Furthermore the design of SVC PLUS ES with supercapacitors as storage technology will be shown.
不断发展的政治和环境改革正在推动当今电力系统的快速发展。在关闭大型火力发电厂的同时,风能和光伏系统等可再生能源提供的电能稳步增加。这一趋势对电力系统网络的性能产生了重大影响,特别是在其动态行为方面。逐步淘汰现有的传统同步发电机将对电压控制和频率调节等辅助服务产生不利影响。本文讨论了应对这些挑战的解决方案之一:使用基于STATCOM的模块化多电平转换器,即带有功率密集型储能(SVC PLUS ES)的SVC PLUS®,可以显著促进电力系统的稳定运行。介绍了输电网中成功的频率和电压支持。此外,还介绍了采用超级电容器作为存储技术的SVC PLUS ES的设计。
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引用次数: 27
A Markov-Middleton model for Corona noise in WSN transmission line monitoring WSN传输线监测中电晕噪声的Markov-Middleton模型
Pub Date : 2015-10-01 DOI: 10.1109/EPEC.2015.7379991
Faranak Dowlatdad, J. Abouei, R. Saadat, A. Anpalagan
This paper investigates the effect of the Corona noise on the performance of wireless sensor networks (WSNs) used for the transmission line monitoring. Toward this goal, a Markov-Middleton channel model that is affected by the Corona noise occurring in the high voltage transmission lines is proposed. In addition, an analytical expression for the packet loss rate of the system is derived. In such a noisy channel, the performance of a Zigbee-based WSN network is simulated using the NS-2 network simulator. Analytical and simulation results show that the Corona noise has significant effects on the performance of such networks and this phenomenon should be taken into account on the transceiver design for the power line monitoring.
研究了电晕噪声对用于输电线路监测的无线传感器网络性能的影响。为此,提出了高压输电线路中受电晕噪声影响的马尔可夫-米德尔顿信道模型。此外,还导出了系统丢包率的解析表达式。在这种噪声信道下,利用NS-2网络模拟器对基于zigbee的WSN网络进行了性能仿真。分析和仿真结果表明,电晕噪声对电晕网络的性能有显著影响,电晕噪声在电力线监测收发器设计时应考虑到这一现象。
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引用次数: 4
期刊
2015 IEEE Electrical Power and Energy Conference (EPEC)
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