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2014 IEEE International Energy Conference (ENERGYCON)最新文献

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Transient analysis of Tehran power grid considering future planned expansion 考虑未来扩建计划的德黑兰电网暂态分析
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850440
A. Khakpour, Amir Golshani, T. Schoenemann, S. Gorchakov
Future planned expansion of Tehran power network depicts that two new generating stations will be installed which result in the increase of short-circuit capacity at some of the grid substations in excess of the interrupting rating of exiting circuit breakers. Various measures regarding short-circuit current mitigation for high voltage application have been proposed in many literatures. This paper intends to investigate the consequence of utilizing three applicable measures (CLR, IPC and SCCL) by taking future model of Tehran power grid into consideration. A comprehensive comparison has been made and the results clearly demonstrate the effect of each measure on short-circuit current level, load flow results, transient stability and transient recovery of circuit breaker. For these purposes, DIgSILENT and EMTP-RV softwares are employed to simulate Tehran power grid and the outcome results revealed the benefits of utilizing IPC comparing to other measures.
德黑兰电网未来计划的扩展表明,将安装两个新发电站,这将导致一些电网变电站的短路容量增加,超过现有断路器的中断额定值。在许多文献中提出了各种缓解高压应用中短路电流的措施。本文拟结合德黑兰电网的未来模式,探讨三种适用措施(CLR、IPC和SCCL)的应用效果。对各措施进行了综合比较,结果清楚地表明了各措施对短路电流水平、负荷流结果、断路器暂态稳定性和暂态恢复的影响。为此,使用DIgSILENT和EMTP-RV软件模拟德黑兰电网,结果显示与其他措施相比,使用IPC的好处。
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引用次数: 0
Wireless sensor networks for smart metering 用于智能计量的无线传感器网络
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850506
A. Weigel, C. Renner, V. Turau, Holger Ernst
Smart metering will change the way we assess and control energy consumption. The necessary two-way communication between energy utilities and smart meters yet requires further research. In particular, cheap, low-maintenance, and reliable alternatives to existing approaches must be analyzed. We believe that self-organizing wireless sensor networks are a promising candidate. In this paper, we perform a requirement analysis for smart metering using wireless sensor network technology; we propose an architecture including a set of protocols; and we conduct a real-world evaluation with a testbed of 64 smart meters. With regard to latency and network formation time, the system was able to fulfill the identified requirements. The results show that the attained reliability for some traffic patterns is low. Further analysis revealed the use of link-layer broadcasts for one-to-many communication as a cause.
智能电表将改变我们评估和控制能源消耗的方式。能源公司和智能电表之间必要的双向通信还需要进一步研究。特别是,必须分析现有方法的廉价、低维护和可靠的替代方案。我们相信自组织无线传感器网络是一个很有前途的候选者。本文对采用无线传感器网络技术的智能电表进行了需求分析;我们提出了一个架构,包括一组协议;我们在一个有64个智能电表的测试平台上进行了实际评估。在延迟和网络形成时间方面,系统能够满足确定的需求。结果表明,某些交通模式的可靠性较低。进一步的分析显示,使用链路层广播进行一对多通信是一个原因。
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引用次数: 7
Optimal allocation process of voltage control devices and operational management of the voltage in distribution systems using the experimental design method 用实验设计方法对配电网电压控制装置的优化配置过程和电压运行管理进行了研究
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850559
J. Toubeau, J. Lobry, F. Vallée, Z. De Grève
This paper presents a new approach to control the voltage in medium voltage (MV) networks by using the Experimental Design method. This method, also referred to as Design of Experiments (DOE), is a powerful tool to establish and study the effects of multiple inputs (factors) on a desired output (response). In this work, the output will be the sum of the absolute values of the deviations between the voltage at each node of the network and the rated voltage. The response should therefore be minimized to ensure the best possible voltage profile along the feeders of the grid. The different studied factors are: on-load tap changer (OLTC) of transformer, curtailment of distributed generation (DG) and reactive power compensation devices. In this study, the DOE is employed for two purposes. Firstly, the parameters which have the most significant impact on the output are selected. Secondly, the values of these parameters are optimised to reduce the voltage variation in the distribution network by using a response surface methodology (RSM) approach. This two-step process is then applied on a 28-bus radial MV network in order to study an overvoltage problem caused by an increased active power generation coming from DG units.
本文提出了一种用实验设计方法控制中压网络电压的新方法。这种方法,也被称为实验设计(DOE),是建立和研究多个输入(因素)对期望输出(响应)的影响的有力工具。在这项工作中,输出将是网络中每个节点的电压与额定电压之间偏差的绝对值之和。因此,响应应最小化,以确保沿电网馈线的最佳电压分布。不同的研究因素有:变压器有载分接开关(OLTC)、分布式发电(DG)的限电和无功补偿装置。在本研究中,DOE被用于两个目的。首先,选取对输出影响最大的参数。其次,利用响应面法(RSM)对这些参数的值进行优化,以减小配电网中的电压变化。然后将这两步过程应用于28母线径向中压网络,以研究由DG机组增加的有功发电量引起的过电压问题。
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引用次数: 2
Mas Roig mini-grid: A renewable-energy-based rural islanded microgrid Mas Roig微型电网:一个基于可再生能源的农村岛屿微型电网
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850544
Pep Salas, J. Guerrero, F. Sureda
This paper presents a microgrid project, named Basic Distributed Nodes (NoBaDis), deployed in a stand-alone farm in Girona, Spain. NoBaDis is based on intensive use of information to maximize the penetration of renewable energy through two main strategies: anticipation and opportunity. The loads are classified in four different types according to priority and are controlled by intelligent sockets interconnected in a mesh network. Each socket measures the main electric parameters, communicates to the local computer bidirectionality by using ZigBee communications, and is able to switch on/off the loads. The power system is composed by low-density energy sources (renewable) and high-density cogeneration engine. These elements can be interconnected in two different configurations to test different scenarios. After 5 years of operation, the results have shown the importance of real-time management system to reduce the operational costs of the microgrid. In addition the project has highlighted the importance of distributed generation and control to assure the energy supply in terms of quality and quantity even in extremely weather conditions as it was in March 2010 during a snow storm that generated a black out that affected more than 250,000 consumers in this area during one week.
本文介绍了一个名为基本分布式节点(NoBaDis)的微电网项目,该项目部署在西班牙赫罗纳的一个独立农场。NoBaDis基于信息的密集利用,通过两种主要策略:预期和机会,最大限度地提高可再生能源的渗透。负载根据优先级分为四种不同的类型,并由网状网络中互连的智能插座控制。每个插座测量主要电气参数,通过ZigBee通信与本地计算机双向通信,并能够开关负载。电力系统由低密度能源(可再生能源)和高密度热电联产发动机组成。这些元素可以在两种不同的配置中相互连接,以测试不同的场景。经过5年的运行,结果显示了实时管理系统对降低微网运行成本的重要性。此外,该项目还强调了分布式发电和控制的重要性,即使在极端天气条件下,也要确保能源供应的质量和数量。2010年3月,一场暴风雪造成了停电,在一周内影响了该地区超过25万名消费者。
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引用次数: 9
Active power modulation assisting controller scheme implemented on a VSC-HVDC link establishing effective damping of low frequency power oscillations 有源功率调制辅助控制器方案在直流直流输电链路上实现,有效抑制低频功率振荡
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850443
Melios Hadjikypris, V. Terzija
Inter-area power oscillations damping is of fundamental importance in today's era of sophisticated and highly complex smart grids. The present paper demonstrates a practical solution obtaining satisfactory performance in damping power system oscillations utilizing the flexible VSC-HVDC transmission technology in an optimal combination with a power oscillation damping (POD) controller, utilizing active power modulation technique. Primary focus of the control scheme is to improve damping of lightly damped or even unstable modes of the interconnected AC/DC power system through modal analysis technique and a residue based approach. The proposed control scheme guarantees stability margins through eigenvalue analysis and non-linear time domain simulations, which are performed on a four-machine two-area system. The software platform under which the various simulation scenarios were implemented was DigSILENT PowerFactory.
在当今复杂、高度复杂的智能电网时代,区域间功率振荡阻尼是至关重要的。本文提出了一种实用的解决方案,利用柔性的VSC-HVDC传输技术,并利用有源功率调制技术与功率振荡阻尼(POD)控制器进行优化组合,以获得令人满意的阻尼电力系统振荡的性能。该控制方案的主要重点是通过模态分析技术和基于残差的方法来改善互联交直流电力系统的轻阻尼甚至不稳定模态的阻尼。本文提出的控制方案通过特征值分析和非线性时域仿真,在四机两区系统上进行了稳定裕度的保证。实现各种模拟场景的软件平台是DigSILENT PowerFactory。
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引用次数: 14
Resonance damping techniques for grid-connected voltage source converters with LCL filters — A review 带LCL滤波器并网电压源变换器的谐振阻尼技术综述
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850424
Chi Zhang, T. Dragičević, J. Vasquez, J. Guerrero
LCL filters play an important role in grid-connected converters when trying to reduce switching-frequency ripple currents injected into the grid. Besides, their small size and low cost make them attractive for many practical applications. However, the LCL filter is a third-order system, which presents a resonance peak frequency. Oscillation will occur in the control loop in high frequency ranges, especially in current loop in double-loops controlled converters. In order to solve this, many strategies have been proposed to damp resonance, including passive and active methods. This paper makes a review of these methods.
LCL滤波器在并网变流器中起着重要的作用,它可以减少注入电网的开关频率纹波电流。此外,它们的小尺寸和低成本使它们在许多实际应用中具有吸引力。然而,LCL滤波器是一个三阶系统,存在共振峰值频率。在高频率范围内,控制回路会产生振荡,特别是在双环控制变换器的电流回路。为了解决这一问题,人们提出了许多抑制共振的策略,包括被动和主动方法。本文对这些方法作一综述。
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引用次数: 37
Reverse active-reactive optimal power flow in ADNs: Technical and economical aspects adn有功无功反向最优潮流:技术和经济方面
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850563
A. Gabash, Pu Li
Since 1880s unidirectional power flows in electrical distribution networks (DNs) have been known as the usual case. But after 1990s due to the installation of new entities such as distributed generation (DG) units and battery storage systems (BSSs) bidirectional power flows would be the future case. Recently, a combined problem formulation for active-reactive optimal power flow (A-R-OPF) has been developed to utilize the economical benefits of operating both low- and medium-voltage active DNs (ADNs). In this paper, some technical and economical aspects of allowing reverse A-R-OPF in ADNs are highlighted. This is achieved by considering a real medium voltage ADN with a high penetration of wind and battery stations. The results show that considering a price for reactive energy in ADNs will lead to a huge amount of reverse reactive energy. This new phenomenon needs to be considered in operating and planning future ADNs.
自19世纪80年代以来,配电网络(dn)中的单向功率流已被视为通常情况。但20世纪90年代以后,由于分布式发电(DG)机组和电池存储系统(bss)等新实体的安装,双向电力流动将是未来的情况。近年来,为了充分利用中、低压有源DNs (ADNs)的经济效益,提出了一种有源无功最优潮流(a -r - opf)的组合问题公式。本文重点介绍了在ADNs中允许反向A-R-OPF的一些技术和经济方面的问题。这是通过考虑具有高风力和电池站渗透率的真实中压ADN来实现的。结果表明,考虑ADNs的无功能价格将导致大量的反向无功能。在操作和规划未来的adn时需要考虑到这一新现象。
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引用次数: 9
Uncertainty management in the measurements for the electric power quality analysis 电能质量分析测量中的不确定度管理
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850503
G. Cipriani, D. La Cascia, R. Miceli, C. Spataro
The paper deals with the uncertainty estimation in the measurements performed to assess the electric power quality. In a first steps, all the error sources, which give a significant contribution to the combined uncertainty associated to the measurement results, are identified. Successively, in order to analyze how the errors combine and propagate through the measurement chain, four approaches are proposed and validated. These approaches entail a greater and greater uncertainty overestimation, but, at the same time, require less and less time and resources. Therefore, the four methodologies are perfectly adequate for the implementation of the PUMA (Procedure for Uncertainty Management) method that is an iterative technique, originally conceived for geometrical and mechanical measurements. This practice allows to optimize the cost of the measurements versus the uncertainty target, avoiding the use of inadequate or, on the contrary, too expensive measurement instruments.
本文讨论了电能质量评估测量中的不确定度估计问题。在第一步中,识别所有误差源,这些误差源对与测量结果相关的组合不确定度有重要贡献。随后,为了分析误差在测量链中的组合和传播情况,提出并验证了四种方法。这些方法导致越来越大的不确定性高估,但同时需要越来越少的时间和资源。因此,这四种方法完全适合于实现PUMA(不确定性管理程序)方法,这是一种迭代技术,最初是为几何和机械测量而构想的。这种做法可以优化相对于不确定度目标的测量成本,避免使用不充分的或相反的,过于昂贵的测量仪器。
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引用次数: 1
The system measures for short circuit current limitation in megalopolis at the example of Moscow-city power system 以莫斯科市电系统为例,提出了特大城市短路限流的系统措施
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850444
S. Utts, Y. Kucherov
The consumption increase, generating capacities and electric grid development in Moscow region and especially on Moscow-City territory in short-term and long-term perspective will lead to the short circuit current increase to ultrahigh values which exceed the disconnection capability of the serial equipment. The present article covers the issues of short circuit current limitation in megalopolis power system taking Moscow Power System as an example. The issues of consumers' power supply reliability were considered. The foreign experience of short circuit current limitation in megalopolis was analyzed. The system approach for solving this problem was proposed. The future recommendations for energy companies were developed.
从短期和长期来看,莫斯科地区特别是莫斯科-城市地区的用电量增加、发电量增加和电网发展将导致短路电流增加到超高值,超过串联设备的断开能力。本文以莫斯科电力系统为例,讨论了特大城市电力系统的短路限流问题。考虑了用户供电可靠性问题。分析了国外特大城市短路限流的经验。提出了解决这一问题的系统方法。对能源公司提出了未来的建议。
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引用次数: 1
Economic dispatch of island power systems with distributed energy resources 分布式能源孤岛电力系统的经济调度
Pub Date : 2014-05-13 DOI: 10.1109/ENERGYCON.2014.6850529
C. Su, Hsiang-Ming Chuang
This paper aims presenting a methodology for economic dispatch (ED) of island grids with distributed energy resources (DERs). The method utilizes an algorithm dedicated to battery storage systems (BSSs) placement optimization in a given power system using genetic algorithms (GA), where daily time varying loads, wind power generations, and diesel power generator operation scheduling are considered together with BSSs characteristics, including capacity, installation location, and charging/discharging. The problem is formulated as a non-differential combinational optimization problem to solve the ED of the BSSs and power units, where the total system cost to be minimized is subject to capacity and system operation constraints. A practical island power system is selected for computer simulations to ensure and demonstrate the performance of proposed method and explore the benefits of BSSs to system operations.
本文旨在提出一种具有分布式能源的岛屿电网经济调度方法。该方法利用遗传算法(GA)在给定的电力系统中对电池储能系统(bss)进行布局优化的算法,其中考虑了每日时变负荷、风力发电和柴油发电机的运行调度以及bss的特性,包括容量、安装位置和充放电。该问题被表述为解决bss和功率单元的ED问题的非微分组合优化问题,其中系统总成本最小化受容量和系统运行约束。选择一个实际的岛屿电力系统进行计算机仿真,以确保和验证所提出方法的性能,并探讨bss对系统运行的好处。
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引用次数: 4
期刊
2014 IEEE International Energy Conference (ENERGYCON)
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