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2017 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)最新文献

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Voltage source converter connected to very weak grids under disturbances 电压源变换器在干扰下连接到非常弱的电网
M. Arani, Y. Mohamed
High Voltage Direct Current (HVDC) transmission lines are increasing rapidly and Voltage Source Converter (VSC)-based is one of the most famous types used in the industry. Despites all of its merits, VSCs have not been favored in very weak grids because of stability issues. Recently, these issues have generated much attention in literature and different solutions are proposed. Among the discussed solutions, the artificial bus is one of the most straight-forward and effective methods, which enable VSC to inject or absorb its maximum nominal power. However, this method is not examined under grid disturbances. This paper studies the impact of severe faults, phase jump and frequency changes and discusses the inherent robustness of the method to fill a serious gap in the literature.
高压直流(HVDC)输电线路正在迅速增加,基于电压源变换器(VSC)的输电线路是工业上最著名的输电线路之一。尽管有很多优点,但由于稳定性问题,vsc在非常弱的电网中并不受欢迎。最近,这些问题在文献中引起了很大的关注,并提出了不同的解决方案。在讨论的解决方案中,人工母线是最直接有效的方法之一,它使VSC能够注入或吸收其最大标称功率。然而,该方法没有在网格扰动下进行检验。本文研究了严重故障、相位跳变和频率变化的影响,并讨论了该方法的固有鲁棒性,填补了文献中的严重空白。
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引用次数: 3
Load forecasting using deep neural networks 基于深度神经网络的负荷预测
S. Hosein, Patrick Hosein
Short-term electricity demand prediction is of great importance to power companies since it is required to ensure adequate capacity when needed and, in some cases, it is needed to estimate the supply of raw material (e.g., natural gas) required to produce the required capacity. The deregulation of the power industry in many countries has magnified the importance of this need. Research in this area has included the use of shallow neural networks and other machine learning algorithms to solve this problem. However, recent results in other areas, such as Computer Vision and Speech Recognition, have shown great promise for Deep Neural Networks (DNN). Unfortunately, far less research exists on the application of DNN to short-term load forecasting. In this paper, we apply DNN as well as other machine learning techniques to short-term load forecasting in a power grid. The data used is taken from periodic smart meter energy usage reports. Our results indicate that DNN performs quite well when compared to traditional approaches. We also show how these results can be used if dynamic pricing is introduced to reduce peak loading.
短期电力需求预测对电力公司非常重要,因为它需要确保在需要时有足够的容量,在某些情况下,需要估计生产所需容量所需的原材料(例如天然气)的供应。许多国家对电力行业的放松管制放大了这一需求的重要性。该领域的研究包括使用浅神经网络和其他机器学习算法来解决这个问题。然而,最近在其他领域的结果,如计算机视觉和语音识别,显示了深度神经网络(DNN)的巨大前景。遗憾的是,深度神经网络在短期负荷预测中的应用研究甚少。在本文中,我们将深度神经网络以及其他机器学习技术应用于电网的短期负荷预测。所使用的数据取自智能电表的定期能源使用报告。我们的结果表明,与传统方法相比,深度神经网络的表现相当好。我们还展示了如果引入动态定价来减少峰值负荷,如何使用这些结果。
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引用次数: 71
Dynamic analysis of OLTC and voltage regulator under active network management considering different load profiles 考虑不同负荷分布的主动电网管理下OLTC和电压调节器的动态分析
Sultan S. Alkaabi, H. Zeineldin, V. Khadkikar, M. E. Moursi
This paper provides a comparative study of coordinated voltage control (CVC) strategies for on-load tap-changers (OLTCs) and voltage regulator (VRs) under active and passive network management schemes (ANM and PNM). In PNM scheme, OLTC and VR are restricted to only regulate the secondary bus voltages at fixed set-points, while in ANM scheme, control of the secondary bus voltages within the statutory voltage range is allowed, thus providing area-based voltage controls. In this paper, the dynamic model of a 33kV 16-bus United Kingdom generic distribution system (UKGDS) is firstly implemented in PSCAD/EMTDC and validated with a steady-state model, using optimal power flow (OPF)-based technique, developed in GAMS software. Secondly, the OLTC and VR controls under ANM and PNM schemes are developed with discrete tap-changers, and tested considering different load profiles and dynamic loads. The results show that the ANM scheme allows considerable utilization of OLTC and VR compared to PNM scheme, but also may increase the loading of these devices depending on load levels and voltage profile in the power network.
本文对有源和无源网络管理方案(ANM和PNM)下有载分接开关(oltc)和电压调节器(VRs)的协调电压控制(CVC)策略进行了比较研究。在PNM方案中,OLTC和VR被限制只能在固定的设定点调节副母线电压,而在ANM方案中,允许将副母线电压控制在法定电压范围内,从而提供基于区域的电压控制。本文首先在PSCAD/EMTDC中实现了33kV 16母线英国通用配电系统(UKGDS)的动态模型,并利用GAMS软件开发的基于最优潮流(OPF)的稳态模型进行了验证。其次,采用离散分接开关设计了ANM和PNM方案下的OLTC和VR控制,并在不同负载和动态负载下进行了测试。结果表明,与PNM方案相比,ANM方案可以充分利用OLTC和VR,但也可能根据电网中的负载水平和电压分布增加这些器件的负载。
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引用次数: 5
Automated vulnerability analysis technique for smart grid infrastructure 智能电网基础设施自动化漏洞分析技术
YooJin Kwon, H. Kim, K. Koumadi, Yong-hun Lim, Jong-in Lim
A smart grid is a fully automated power electricity network, which operates, protects and controls all its physical environments of power electricity infrastructure being able to supply energy in an efficient and reliable way. As the importance of cyber-physical system (CPS) security is growing, various vulnerability analysis methodologies for general systems have been suggested, whereas there has been few practical research targeting the smart grid infrastructure. In this paper, we highlight the significance of security vulnerability analysis in the smart grid environment. Then we introduce various automated vulnerability analysis techniques from executable files. In our approach, we propose a novel binary-based vulnerability discovery method for AMI and EV charging system to automatically extract security-related features from the embedded software. Finally, we present the test result of vulnerability discovery applied for AMI and EV charging system in Korean smart grid environment.
智能电网是一个完全自动化的电力网络,它运行、保护和控制电力基础设施的所有物理环境,能够以高效、可靠的方式供应能源。随着网络物理系统(CPS)安全的重要性日益提高,人们提出了各种针对一般系统的漏洞分析方法,而针对智能电网基础设施的实际研究却很少。本文强调了安全漏洞分析在智能电网环境下的重要意义。然后介绍了基于可执行文件的各种自动化漏洞分析技术。本文提出了一种新的基于二进制文件的AMI和电动汽车充电系统漏洞发现方法,从嵌入式软件中自动提取安全相关特征。最后给出了韩国智能电网环境下AMI和电动汽车充电系统的漏洞发现测试结果。
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引用次数: 8
Novel direct power control of single-phase three-level SVPWM inverter for photovoltaic generation 光伏发电用单相三电平SVPWM逆变器的新型直接功率控制
Zaid H. Ali, Junhui Zhao, Emad Manla, Junpeng Ma, Wensheng Song
In order to get the desired output from photovoltaic (PV) generation, it is necessary to control the power exchange with the grid. Therefore, the calculations of real and reactive power for PV inverters are important. In this study, a novel direct power control (DPC) strategy for three-level single-phase grid-connected SVPWM inverters has been developed. In this strategy, the real and reactive power control and SVPWM are considered in inner loop, while a voltage PI controller is used in outer loop to acquire constant output voltage and provide power reference to the DPC. In addition, the MPPT algorithm is integrated into the control strategy to get the maximum PV output. The performance of the proposed method is verified by simulation results obtained using Matlab/Simulink.
为了使光伏发电获得理想的输出,需要对与电网的电力交换进行控制。因此,光伏逆变器的实功率和无功功率的计算非常重要。本文提出了一种新的三电平单相并网SVPWM逆变器直接功率控制策略。在该策略中,内环考虑了实、无功功率控制和SVPWM,外环采用电压PI控制器获取恒定输出电压,为DPC提供功率参考。此外,将MPPT算法融入到控制策略中,以获得最大PV输出。通过Matlab/Simulink的仿真结果验证了该方法的有效性。
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引用次数: 8
Integrated system to enable high-penetration feeder-level PV: Preliminary design and simulation results 集成系统实现高穿透馈线级PV:初步设计和仿真结果
Michael Zeifman, M. Kromer, K. Roth
We present a novel framework — the SunDial system — intended to enable integration of high-penetration commercial and utility-scale photovoltaic (PV) plants by a combination of load and energy storage management. Rather than relying on controllable loads from disparate individual buildings, SunDial uses a Facility Load Aggregation and Management Engine (FLAME) that provides a single point of input for managing the electric loads in multiple commercial and/or industrial facilities. By implementing various demand response strategies, FLAME acts as a virtual energy storage resource, thus increasing the roundtrip efficiency and capacity of the Sundial's coupled battery/load-based storage system. An open standard to support broader utilization of long-duration load shifting as a means to enable grid integration of distributed renewables is also proposed. The SunDial system is planned to be deployed in Massachusetts in 2017–2019 on the National Grid distribution system. This paper presents its basic architecture, a simulation-based prototype and preliminary results based on actual loads from commercial buildings.
我们提出了一个新的框架——日晷系统,旨在通过负载和储能管理的结合,实现高渗透商业和公用事业规模光伏(PV)电站的集成。SunDial使用设施负载聚合和管理引擎(FLAME)来管理多个商业和/或工业设施的电力负载,而不是依赖于来自不同个体建筑的可控负载。通过实施各种需求响应策略,FLAME充当虚拟能源存储资源,从而提高日晷电池/负载耦合存储系统的往返效率和容量。还提出了一个开放标准,以支持更广泛地利用长时间负荷转移作为实现分布式可再生能源电网整合的手段。日晷系统计划于2017-2019年在马萨诸塞州的国家电网配电系统上部署。本文介绍了该系统的基本结构、基于仿真的原型以及基于商业建筑实际荷载的初步结果。
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引用次数: 2
A SGAM-based architecture for synchrophasor applications facilitating TSO/DSO interactions 一种基于sgram的架构,用于同步量应用程序,促进TSO/DSO交互
H. Hooshyar, L. Vanfretti
Distribution grid dynamics are becoming increasingly complex due to the transition of these networks from passive to active networks. This transition requires increasing the observability and awareness of the interactions between Transmission and Distribution (T&D) grids, particularly to guarantee adequate operational security. As part of the work carried out in the EU-funded IDE4L project, a specific use case, containing PMU-based monitoring functions, has been defined to support the architecture design of a distribution grid automation system. As a result, the architecture can accommodate for synchrophasor applications that provide key dynamic information extraction and exchange between DSO and TSO. This paper presents the use case and the portion of the IDE4L architecture that accommodates for scenarios that exploit synchrophasors for monitoring applications.
由于配电网由被动电网向主动电网的转变,配电网的动态变得越来越复杂。这种转变需要提高对输配电(T&D)电网之间相互作用的可观察性和意识,特别是为了保证足够的运行安全。作为欧盟资助的IDE4L项目工作的一部分,已经定义了一个特定的用例,包含基于pmu的监控功能,以支持配电网自动化系统的架构设计。因此,该体系结构可以适应提供关键动态信息提取和DSO和TSO之间交换的同步应用程序。本文介绍了用例和IDE4L体系结构的一部分,该部分适用于利用同步量监视应用程序的场景。
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引用次数: 7
Hardware and software model evaluation of a dynamic load balancer for mitigation of current unbalance in distribution circuits 一种用于缓解配电电路电流不平衡的动态负载平衡器的硬件和软件模型评估
Tim Chang, H. Mirzaee, F. Katiraei, Marvin Zavala-Iraheta
Current unbalance conditions are a concern to utilities and can negatively affect power quality and safe and reliable system operation if left untreated. Conventional solutions involve physical re-configuration and are typically challenging and less effective as these changes are temporary and will change as circuit and customer load habits evolve. As alternative, power electronic-based devices are promising solutions to mitigating current unbalance. This paper introduces the control theory behind one such power electronics-based Dynamic Load Balancer (DLB) and details the development of a transient software-based simulation model to allow for mitigation planning and performance evaluation in distribution circuits. The physical and software model for DLB were tested under a range of system conditions as verification of model accuracy and also evaluation of the device capabilities and performance.
当前的不平衡状况是公用事业关注的问题,如果不及时处理,可能会对电力质量和安全可靠的系统运行产生负面影响。传统的解决方案涉及物理重新配置,通常具有挑战性且效率较低,因为这些更改是暂时的,并且会随着电路和客户负载习惯的变化而变化。作为替代方案,基于电力电子的设备是缓解电流不平衡的有希望的解决方案。本文介绍了一种基于电力电子的动态负载平衡器(DLB)背后的控制理论,并详细介绍了一种基于暂态软件的仿真模型的开发,以允许配电电路中的缓解规划和性能评估。在一系列系统条件下对DLB的物理和软件模型进行了测试,以验证模型的准确性,并对设备的功能和性能进行了评估。
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引用次数: 0
Hour-ahead solar PV power forecasting using SVR based approach 基于SVR的小时前太阳能光伏发电功率预测方法
Abdullah Alfadda, R. Adhikari, M. Kuzlu, S. Rahman
The use of solar photovoltaic (PV) in power generation has grown in the last decade. Unlike the traditional power generation methods (i.e. oil and gas), the solar output power is fluctuating and uncertain, mainly due to clouds movement and other weather factors. Therefore, in order to have a stable power grid, the electricity utilities need to forecast the solar output power, so they can prepare ahead adequately. In this work, hour-ahead solar PV power forecasting is performed using Support Vector Regression (SVR), Polynomial Regression and Lasso. The implemented regression models were tested under different feature selection schemes. These features include weather conditions (i.e. sky condition, temperature, etc.), power generated in the last few hours, day and time information. Based on the comparative results obtained, the SVR forecasting model outperforms the other two models in terms of accuracy.
在过去十年中,太阳能光伏(PV)在发电中的使用有所增长。与传统的发电方式(即石油和天然气)不同,太阳能的输出功率是波动的和不确定的,主要受云层移动和其他天气因素的影响。因此,为了拥有一个稳定的电网,电力公司需要预测太阳能的输出功率,这样他们就可以提前做好充分的准备。本文采用支持向量回归(SVR)、多项式回归和Lasso方法进行小时前太阳能光伏发电功率预测。在不同的特征选择方案下对所实现的回归模型进行了测试。这些功能包括天气状况(即天空状况、温度等)、过去几小时内的发电量、日期和时间信息。对比结果表明,支持向量回归预测模型在准确率上优于其他两种模型。
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引用次数: 34
Centralized control for DC microgrid using finite state machine 基于有限状态机的直流微电网集中控制
Mahmoud Saleh, Yusef Esa, A. Mohamed
In this paper, an autonomous communication-based centralized control for DC microgrids (MG) has been developed and implemented. The proposed controller enables smooth transition between various operating modes. Finite state machine (FSM) has been used to mathematically describe the various operating modes (states), and events that may lead to mode changes (transitions). Therefore, the developed centralized controller aims at optimizing the performance of MG during all possible operational scenarios, while maintaining its reliability and stability. Results of selected cases have been presented. These results show stable transition between modes, verifying the validity and applicability of the proposed controller.
本文提出并实现了一种基于自主通信的直流微电网集中控制系统。所提出的控制器能够在各种操作模式之间平滑过渡。有限状态机(FSM)已被用于数学地描述各种操作模式(状态)和可能导致模式变化的事件(转换)。因此,所开发的集中控制器旨在优化MG在所有可能的运行场景下的性能,同时保持其可靠性和稳定性。本文介绍了选定病例的结果。结果表明,该控制器具有稳定的模式转换特性,验证了该控制器的有效性和适用性。
{"title":"Centralized control for DC microgrid using finite state machine","authors":"Mahmoud Saleh, Yusef Esa, A. Mohamed","doi":"10.1109/ISGT.2017.8086062","DOIUrl":"https://doi.org/10.1109/ISGT.2017.8086062","url":null,"abstract":"In this paper, an autonomous communication-based centralized control for DC microgrids (MG) has been developed and implemented. The proposed controller enables smooth transition between various operating modes. Finite state machine (FSM) has been used to mathematically describe the various operating modes (states), and events that may lead to mode changes (transitions). Therefore, the developed centralized controller aims at optimizing the performance of MG during all possible operational scenarios, while maintaining its reliability and stability. Results of selected cases have been presented. These results show stable transition between modes, verifying the validity and applicability of the proposed controller.","PeriodicalId":296398,"journal":{"name":"2017 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124424248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
期刊
2017 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT)
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