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2014 49th International Universities Power Engineering Conference (UPEC)最新文献

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Resource allocation of on-site PV production within the built environment 在建筑环境中进行现场光伏生产的资源分配
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934615
S. Tolboom, L. A. Hurtado, P. Nguyen, B. Vonk, W. Kling
Though the built environment represents a considerable amount of the total energy demand in cities, building operation still causes higher energy consumption than needed. Meanwhile, building's on-site generation has not been coupled properly with the building energy management system (BEMS). The supply demand problem is addressed in the energy management and becomes highly complex with the introduction of Distributed Energy Resources (DER). It is important to ensure an optimal allocation of the generated energy, a scarce resource, among the potential consuming devices. This paper facilitates the integration of DER in the built environment and ensures the optimal allocation of the generated energy by using a Multi-Agent System and two different decision making strategies.
尽管建筑环境在城市总能源需求中占相当大的比例,但建筑运行仍然造成了高于所需的能源消耗。同时,建筑现场发电与建筑能源管理系统(BEMS)没有很好地耦合。供需问题是能源管理中要解决的问题,随着分布式能源的引入,供需问题变得高度复杂。重要的是确保在潜在的消费设备之间对产生的稀缺资源进行最佳分配。本文采用多智能体系统和两种不同的决策策略,促进了DER在建筑环境中的集成,保证了产生的能量的最优分配。
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引用次数: 1
Confidence levels in measuring the parameters of PQ. A case study 测量PQ参数的置信水平。案例研究
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934821
Niculai Stanciu, Dorel Stanescu, I. Dobre, P. Postolache
Evaluation of PQ parameters is made by means of the results of measurements. Because the evaluation of PQ parameters must be reasonable, the results of measurements must have a adequate confidence level. In this sense, have been established a number of requirements that are specified, for each PQ parameter, in IEC 50160:2010, IEC 61000-4-30:2008 and other related standards. One of the essential requirements, to measuring PQ parameters, is to ensure the measurement uncertainty specified in the standards. Since measurements are always accompanied by errors is very important for us to know the physical phenomenon, measurand and measuring conditions, for to act in minimizing the influence of errors. The accuracy and precision of measurement results in PQ, as well and their levels of confidence are various and depend on the determinations purpose. From this perspective, in IEC 61000-4-30:2008 are defined the classes of measurement methods (Class A, Class S and Class B) and the levels of uncertainty for each parameter PQ, [1].
通过测量结果对PQ参数进行评价。因为PQ参数的评估必须是合理的,所以测量结果必须有足够的置信度。从这个意义上说,在IEC 50160:2010、IEC 61000-4-30:2008和其他相关标准中,已经建立了许多规定每个PQ参数的要求。测量PQ参数的基本要求之一是保证标准中规定的测量不确定度。由于测量总是伴随着误差,对我们来说,了解物理现象、测量和测量条件是非常重要的,以便采取行动,尽量减少误差的影响。PQ测量结果的准确度和精密度,以及它们的置信水平是多种多样的,取决于测定目的。从这个角度来看,IEC 61000-4-30:2008中定义了测量方法的类别(A类,S类和B类)和每个参数PQ的不确定度,[1]。
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引用次数: 0
Use of the modern stand equipment in the educational process in the course «electrical engineering» 《电气工程》课程教学过程中现代展台设备的使用
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934714
S. V. Levinzon, Natalia V. Tsarkova, D. Melnikov
Considered and highlighted the strengths and weaknesses of different approaches for laboratory research in the field of electrical engineering, building on the existing Federal education standards. Shows how the laboratory practical work using combined studying is realized, on the example of multimedia laboratory of the German firm Lucas Nulle on specific activities in electrical engineering. Focused on the perception of European equipment by students of the Russian Federation. Conclusions are given.
在现有联邦教育标准的基础上,考虑并强调了电气工程领域不同实验室研究方法的优缺点。以德国Lucas Nulle公司多媒体实验室在电气工程中的具体活动为例,说明了联合学习的实验室实践工作是如何实现的。重点是俄罗斯联邦学生对欧洲设备的看法。最后给出了结论。
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引用次数: 3
Application of time-series and Artificial Neural Network models in short term load forecasting for scheduling of storage devices 时间序列和人工神经网络模型在存储设备调度短期负荷预测中的应用
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934761
K. Ahmed, M. Ampatzis, P. Nguyen, W. Kling
In the context of the smart grid, scheduling residential energy storage device is necessary to optimize technical and market integration of distributed energy resources (DERs), especially the ones based on renewable energy. The first step to achieve proper scheduling of the storage devices is electricity consumption forecasting at individual household level. This paper compares the forecasting ability of Artificial Neural Network (ANN) and AutoRegressive Integrated Moving Average (ARIMA) model. The benefit of proper storage scheduling is demonstrated via a use-case. The work is a part of a project focused on photovoltaic generation with integrated energy storage at household level. The methods under study attempt to capture the daily electricity consumption profile of an individual household.
在智能电网的背景下,对住宅储能设备进行调度是优化分布式能源,特别是基于可再生能源的分布式能源的技术和市场整合的必要条件。实现存储设备合理调度的第一步是对个体家庭的用电量进行预测。本文比较了人工神经网络(ANN)和自回归综合移动平均(ARIMA)模型的预测能力。适当的存储调度的好处是通过一个用例来展示的。这项工作是一个项目的一部分,重点是光伏发电和家庭一级的综合储能。正在研究的方法试图捕捉单个家庭的日常电力消耗概况。
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引用次数: 15
Optimal location for shunt connected reactive power compensation 并联无功补偿的最佳位置
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934743
A. Elansari, J. Burr, S. Finney, M. Edrah
Flexible AC Transmission Systems (FACTS) have been used to improve voltage stability and to increase Total Transfer Capability (TTC) of transmission systems. Shunt injected reactive power compensation such as Mechanically Switched Capacitors (MSC), Static VAr Compensators (SVC) and Static Synchronous Compensators (STATCOM) are widely used as practical and cost effective solutions to improve transmission line performance. This paper illustrates a new approach to determine optimal location for VAr shunt compensation as a measure to maintain system voltages within acceptable levels which leads to losses reduction, increased system utilization and improved stability. This paper introduces a new method to determine optimal location for shunt compensator devices considering both economic and security aspects. The Kundur two area test system is used to evaluate and validate the new algorithm using NEPLAN power system analysis tool. The results show the effectiveness of the new method to determine the optimal location for shunt VAr compensation.
柔性交流输电系统(FACTS)已被用于改善电压稳定性和提高输电系统的总传输能力(TTC)。并联注入无功补偿,如机械开关电容器(MSC)、静态无功补偿器(SVC)和静态同步补偿器(STATCOM),作为提高输电线路性能的实用和经济有效的解决方案被广泛应用。本文阐述了一种确定无功并联补偿的最佳位置的新方法,作为一种将系统电压维持在可接受水平内的措施,从而减少损耗,提高系统利用率和提高稳定性。本文介绍了一种从经济性和安全性两方面考虑,确定并联补偿装置最优位置的新方法。利用NEPLAN电力系统分析工具,利用Kundur二区测试系统对新算法进行了评估和验证。结果表明,该方法可以有效地确定并联无功补偿的最佳位置。
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引用次数: 7
A new control method for the power interface in power hardware-in-the-loop simulation to compensate for the time delay 在电源半实物仿真中,提出了一种补偿电源接口时延的新型控制方法
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934618
E. Guillo‐Sansano, A. Roscoe, C. Jones, G. Burt
In an attempt to create a new control method for the power interface in PHIL simulations, a simulated PHIL simulation is carried out where the simulation and hardware part are modelled in MATLAB/Simulink along with the new control method. This power interface control is proposed to achieve high accuracy in PHIL simulation with closed-loop control for aerospace, marine or micro grid applications. Rather than analyzing the Real Time Simulator (RTS) data and controlling the interface using time-domain resonant controllers, the RTS data will be analyzed and controlled at the interface in the frequency domain, on a harmonic-by-harmonic and phase-by-phase basis. This should allow the RTS time delay to be compensated accurately, and removes the requirement to include additional components to compensate for the simulation delay into the simulated power system as it is not appropriate for power systems which have short transmission lines. This is extremely relevant for marine and micro grid scenarios where such inductive components may not be present.
为了尝试为PHIL仿真中的电源接口创建一种新的控制方法,在MATLAB/Simulink中对仿真和硬件部分进行了仿真PHIL仿真,并结合新的控制方法对仿真和硬件部分进行了建模。提出这种功率接口控制是为了在航空航天,船舶或微电网应用的PHIL仿真中实现高精度的闭环控制。而不是分析实时模拟器(RTS)的数据和控制接口使用时域谐振控制器,RTS数据将分析和控制在频域的接口上,在谐波和相位的基础上。这应该允许RTS时间延迟得到准确补偿,并且消除了在模拟电力系统中包含额外组件来补偿模拟延迟的要求,因为它不适合具有短传输线的电力系统。这对于海洋和微电网来说是非常重要的,因为这些地方可能没有感应元件。
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引用次数: 23
Applicability of line outage distribution factors to evaluate distribution network expansion options 线路中断分布因子在评价配电网扩建方案中的适用性
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934723
M. Grond, Jip I. P. Pouw, J. Morren, H. Slootweg
Distribution network operators require more advanced planning tools to deal with the challenges of future network planning. An appropriate planning and optimization tool can identify which option for network extension should be selected from available alternatives. However, the evaluation part in these optimization approaches results in many power flow calculations, especially in case of networks which need evaluation of reconfigurability capacity. An iterative approach like the generally accepted AC power flow is a relatively computational expensive evaluation method. Therefore, it is investigated if a linear power flow method with line outage distribution factors (LODFs) can be applied. This paper identifies the trade-off in speed and accuracy of LODFs regarding the evaluation of reconfigurable medium voltage distribution networks.
配电网运营商需要更先进的规划工具来应对未来电网规划的挑战。适当的规划和优化工具可以确定应该从可用的备选方案中选择网络扩展的哪个选项。然而,这些优化方法中的评估部分导致了许多潮流计算,特别是在需要评估网络可重构能力的情况下。一般接受的交流潮流迭代法是一种计算成本相对较高的评估方法。因此,研究了考虑线路停电分配因子的线性潮流法能否应用。本文确定了可重构中压配电网评估中lodf的速度和准确性之间的权衡。
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引用次数: 4
Optimal sizing and siting of distributed generators using Big Bang Big Crunch method 用大爆炸大压缩方法优化分布式发电机的尺寸和选址
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934787
Y. Hegazy, Mahmoud M. Othman, W. El-Khattam, A. Abdelaziz
The concept of integrating small generating units in the power system attracted the attention in the last few decades. Distributed generator (DG) reinforces the main generating station in covering the growing power demand. DG can be connected or disconnected easily from the network unlike the main power stations, thus providing higher flexibility. Good planned and operated DG has many benefits as economic savings, decrement of power losses, greater reliability and higher power quality. Optimal location and capacity of DGs plays a pivotal rule in achievement of gaining the maximum benefits from DGs, on the other side improper placement or sizing of DGs may cause undesirable effects. This paper applies the Big Bang Big Crunch optimization algorithm on balanced/ unbalanced distribution networks for optimal placement and sizing of distributed generators. The proposed algorithm deals with the optimization problems incorporating voltage controlled distributed generators for the sake of power loss minimization. The proposed algorithm is implemented in MATLAB environment and tested on the 69-bus feeder system and the IEEE 37-node feeder. Validation of the proposed method is done via comparing the results with published results obtained from other competing methods.
在过去的几十年里,将小型发电机组集成到电力系统中的概念引起了人们的关注。分布式发电机(DG)加强了主发电站,以满足日益增长的电力需求。与主电站不同,DG可以很容易地与电网连接或断开,从而提供更高的灵活性。良好的规划和运行的DG具有许多好处,如节约经济,减少电力损失,提高可靠性和更高的电力质量。dg的最佳位置和容量是实现dg效益最大化的关键,但dg的位置和尺寸不当也会产生不良影响。本文将Big Bang Big Crunch优化算法应用于平衡/不平衡配电网中分布式发电机的最优配置和规模。该算法处理的是电压控制分布式发电机的优化问题,以达到功率损耗最小的目的。该算法在MATLAB环境下实现,并在69总线馈线系统和IEEE 37节点馈线系统上进行了测试。通过将结果与其他竞争方法获得的已发表结果进行比较,验证了所提出的方法。
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引用次数: 16
Harmonics and interharmonics analysis of power signals using Gaussian filter banks 用高斯滤波器组分析电力信号的谐波和间谐波
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934606
A. Miron, M. Chindris, A. Cziker
The paper presents a method based on the Fast Fourier Transform and Gauss Window combined with a recursive algorithm for the estimation of the voltages and currents harmonics and interharmonics. The proposed method uses pairs of band-pass filters to obtain the frequency domain components of the power signals. The band-pass filters emerge from the grouping made between the Gauss Window and the Fourier Transform. The outputs of these filters are attenuated copies of the input distorted signals and they are utilized to calculate the characteristics of the harmonic and interharmonic components present in the spectrum of the power signals. The analysis is performed on a time interval equivalent with 10 cycles of the fundamental frequency as the standard literature recommends. The proposed algorithm was implemented in a virtual instrument used to process synthetic and field data. The obtained results showed high precision in harmonics and interharmonics detection, with no leakage effect even in the case of fundamental frequency deviation.
本文提出了一种基于快速傅里叶变换和高斯窗结合递推算法的电压电流谐波和间谐波估计方法。该方法采用带通滤波器对来获取功率信号的频域分量。带通滤波器是从高斯窗和傅里叶变换之间的分组中产生的。这些滤波器的输出是输入失真信号的衰减副本,它们用于计算功率信号频谱中存在的谐波和谐波间分量的特性。按照标准文献的建议,在相当于基频10个周期的时间间隔上进行分析。该算法在虚拟仪器中实现,用于处理综合数据和现场数据。所得结果表明,谐波和间谐波检测精度高,即使在基频偏差的情况下也没有泄漏效应。
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引用次数: 4
Tracking smart grid hackers 追踪智能电网黑客
Pub Date : 2014-10-23 DOI: 10.1109/UPEC.2014.6934754
John Hastings, D. Laverty, D. Morrow
The next-generation smart grid will rely highly on telecommunications infrastructure for data transfer between various systems. Anywhere we have data transfer in a system is a potential security threat. When we consider the possibility of smart grid data being at the heart of our critical systems infrastructure it is imperative that we do all we can to ensure the confidentiality, availability and integrity of the data. A discussion on security itself is outside the scope of this paper, but if we assume the network to be as secure as possible we must consider what we can do to detect when that security fails, or when the attacks comes from the inside of the network. One way to do this is to setup a hacker-trap, or honeypot. A honeypot is a device or service on a network which appears legitimate, but is in-fact a trap setup to catch breech attempts. This paper identifies the different types of honeypot and describes where each may be used. The authors have setup a test honeypot system which has been live for some time. The test system has been setup to emulate a device on a utility network. The system has had many hits, which are described in detail by the authors. Finally, the authors discuss how larger-scale systems in utilities may benefit from honeypot placement.
下一代智能电网将高度依赖电信基础设施在不同系统之间进行数据传输。系统中任何有数据传输的地方都是潜在的安全威胁。当我们考虑到智能电网数据可能成为我们关键系统基础设施的核心时,我们必须尽一切努力确保数据的机密性、可用性和完整性。关于安全本身的讨论超出了本文的范围,但是如果我们假设网络尽可能安全,我们必须考虑我们可以做些什么来检测安全故障,或者当攻击来自网络内部时。一种方法是设置黑客陷阱或蜜罐。蜜罐是网络上看似合法的设备或服务,但实际上是为了捕获入侵企图而设置的陷阱。本文确定了不同类型的蜜罐,并描述了每种蜜罐的使用情况。作者建立了一个测试蜜罐系统,该系统已经运行了一段时间。该测试系统已建立,以模拟公用事业网络上的设备。该系统取得了许多成功,作者对此进行了详细的描述。最后,作者讨论了大型公用事业系统如何从蜜罐安置中受益。
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引用次数: 3
期刊
2014 49th International Universities Power Engineering Conference (UPEC)
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