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2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)最新文献

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Techniques for the Analysis of Time-Domain Conducted Emissions of SMPS in Smart Grids 智能电网中SMPS的时域传导辐射分析技术
A. Mariscotti, L. Sandrolini
This work presents an analysis of two techniques used to analyze the frequency domain characteristics of conducted emissions measured in time domain using a LISN connected to two Switched-Mode Power Supplies. The considered interval is 10-150 kHz. The two techniques are the Short Time Fourier Transform and the Empirical Mode Decomposition method, focusing on spectral properties of impulsive phenomena, and compatibility with the typical settings of EMI receiver, whose output represents a validation reference case. The analysis points out the influence of the record length and resolution bandwidth with respect to the local signal non-stationarity.
这项工作介绍了两种技术的分析,用于分析在时域测量的传导发射的频域特性,使用连接到两个开关模式电源的LISN。考虑的间隔是10- 150khz。这两种技术分别是短时傅里叶变换和经验模态分解方法,重点关注脉冲现象的频谱特性,并与EMI接收器的典型设置兼容,其输出代表验证参考案例。分析了记录长度和分辨率带宽对局部信号非平稳性的影响。
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引用次数: 6
Planning of Smart Microgrids with High Renewable Penetration Considering Electricity Market Conditions 考虑电力市场条件的可再生能源高渗透率智能微电网规划
S. Hakimi, Hamed Bagheritabar, Arezoo Hasankhani, M. Shafie‐khah, M. Lotfi, J. Catalão
In this paper, a new method for optimal sizing of distributed generation (DG) is presented in order to minimize electricity costs in smart microgrids (MGs). This paper presents a study of the effect of wholesale electricity market on smart MGs. The study was performed for the Ekbatan residential complex which includes three smart MGs considering high penetration of renewable energy resources and a 63/20 kV substation in Tehran, Iran. The role of these smart MGs in the pool electricity market is a price maker, and a game-theoretical (GT) model is applied for their bidding strategies. The objective cost function considers different cost parameters in smart MGs, which are optimized using particle swarm optimization (PSO). The results show that applying this method is effective for economic sizing of DGs.
为了使智能微电网的电力成本最小化,提出了一种新的分布式发电规模优化方法。本文研究了电力批发市场对智能电网的影响。该研究是在伊朗德黑兰的Ekbatan住宅区进行的,该住宅区包括三个考虑到可再生能源高渗透率的智能mg和一个63/20千伏变电站。智能电网在池电市场中的角色是价格制定者,并应用博弈论模型对其竞价策略进行了分析。目标代价函数考虑了智能mg的不同代价参数,并采用粒子群算法(PSO)进行优化。结果表明,应用该方法对DGs的经济施胶是有效的。
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引用次数: 8
Stochastic Security Constrained Unit Commitment with High Penetration of Wind Farms 高渗透风电场随机安全约束机组承诺
M. Kia, S. H. Hosseini, Alireza Heidari, M. Lotfi, J. Catalão, M. Shafie‐khah, G. Osório, S. Santos
Secure and reliable operation is one of the main challenges in restructured power systems. Wind energy has been gaining increasing global attention as a clean and economic energy source, despite the operational challenges its intermittency brings. In this study, we present a formulation for electricity and reserve market clearance in the presence of wind farms. Uncertainties associated with generation and line outages are modeled as different system scenarios. The formulation incorporates the cost of different scenarios in a two-stage short-term (24-hours) clearing process, also considering different types of reserve. The model is then linearized in order to be compatible with standard mixed-integer linear programming solvers, aiming at solving the security constrained unit-commitment problem using as few variables and optimization constraints as possible. As shown, this will expedite the solution of the optimization problem. The model is validated by testing it on a case study based on the IEEE RTS1, for which results are presented and discussed.
安全可靠运行是电力系统改造面临的主要挑战之一。风能作为一种清洁和经济的能源越来越受到全球的关注,尽管它的间歇性带来了运营上的挑战。在本研究中,我们提出了一个在风力发电场存在的情况下电力和储备市场清仓的公式。与发电和线路中断相关的不确定性被建模为不同的系统场景。该公式将不同情况的成本纳入两阶段短期(24小时)清算过程,同时也考虑到不同类型的储备。然后对模型进行线性化处理,使其与标准的混合整数线性规划解相兼容,旨在使用尽可能少的变量和优化约束来求解安全约束的机组承诺问题。如图所示,这将加快优化问题的解决。在基于IEEE RTS1的案例研究中对模型进行了验证,并给出了结果并进行了讨论。
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引用次数: 3
Online Fault Location in Monopolar LCC-HVDC links With Metallic Return Using Modal Transient Data 基于模态暂态数据的单相LCC-HVDC金属回路在线故障定位
M. Ashouri, F. D. da Silva, C. Leth Bak
This paper proposes an online fault localization technique for line commutated converter high voltage direct current (LCC-HVDC) transmission links, which use single core monopolar cables with metallic return. The conducting layers of the cables have mutual off-diagonal elements in the longitudinal impedance matrix. Thereupon, in case of faults in DC transmission section due to the coupling between conducting layers, using the direct measurements for localizing the fault results in a noticeable amount of error. In this paper, based on the modal theory, the longitudinal matrix of HVDC cable bundle is diag-onalized into the decoupled modal matrix. Each of the resulted modes has different attenuation, velocities, and characteristic impedances. According to this velocity difference, an online one-sided modal fault location algorithm is presented. The proposed method gives more accurate results than common methods that use direct traveling wave data for fault localization. Discrete Wavelet Transform (DWT) is used for detecting modal initial peaks. CIGRE LCC-HVDC link is modeled in PSCAD/EMTDC and further fault location algorithm is designed in MATLAB. The comparison between obtained results and techniques based on direct measurement proves the accuracy and robustness of the proposed modal fault location algorithm.
针对线路整流变换器高压直流(lc - hvdc)输电链路,提出了一种带金属回路的单芯单极电缆在线故障定位技术。电缆的导电层在纵向阻抗矩阵中具有相互的非对角线元素。因此,当直流传输段由于导电层之间的耦合而出现故障时,使用直接测量来定位故障会产生明显的误差。本文基于模态理论,将高压直流电缆束纵向矩阵对角化为解耦模态矩阵。每个得到的模态都有不同的衰减、速度和特征阻抗。根据这种速度差,提出了一种在线单侧模态故障定位算法。该方法比常用的直接行波数据进行故障定位的方法具有更高的精度。采用离散小波变换(DWT)检测模态初始峰值。在PSCAD/EMTDC中对CIGRE lc - hvdc链路进行建模,并在MATLAB中设计了进一步的故障定位算法。通过与直接测量方法的比较,验证了所提模态故障定位算法的准确性和鲁棒性。
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引用次数: 1
Development of Control Algorithms to Ensure Optimal Thermal Modes of Semiconductor Switches in Distributed Static Synchronous Series Compensators 分布式静态同步串联补偿器中半导体开关最佳热模式控制算法的发展
P. Rashitov, Evgeniy A. Vershanskiy, A. Gorchakov
The control algorithm of the distributed static synchronous series compensator provided the optimal thermal mode of semiconductor switches is considered. The results of simulation model of the distributed static synchronous series compensator using the new algorithm in two software complexes are presented.
考虑了半导体开关最优热模式下分布式静态同步串联补偿器的控制算法。给出了用新算法在两个软件综合体中对分布式静态同步串联补偿器进行仿真的结果。
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引用次数: 3
Continuous Control Set Model Predictive Controller for PMSM Driven Solar PV Water Pumping System 永磁同步电机驱动的太阳能光伏水泵系统连续控制集模型预测控制器
Mohd. Kashif, Shadab Murshid, Bhim Singh
A continuous-control set model predictive control (C-MPC) for speed control of permanent magnet synchronous motor (PMSM) fed by a solar photovoltaic (PV) array driving water pump is implemented in this paper. The controller improves the dynamic performance and reduces the steady-state errors. The maximum power point operation of solar PV array is performed using perturb and observe maximum power tracking (MPPT) algorithm. The PMSM is operated by estimating the rotor angular position using back-emf based position sensing method. This eliminates the need of mechanical position sensor. The performance of C-MPC in PMSM drive-system under variable solar insolation, is obtained at starting, steady-state and during dynamics on MATLAB/Simulink platform. A laboratory prototype of the PMSM drive system is developed to validate the performance of the controller.
针对太阳能光伏发电(PV)阵列驱动水泵驱动的永磁同步电动机的速度控制问题,提出了一种连续控制集模型预测控制方法。该控制器提高了系统的动态性能,减小了系统的稳态误差。采用摄动和观测最大功率跟踪(MPPT)算法对太阳能光伏阵列进行最大功率点运行。永磁同步电机采用基于反电动势的位置传感方法对转子角位置进行估计。这就消除了对机械位置传感器的需要。在MATLAB/Simulink平台上对变日照条件下永磁同步电机驱动系统中C-MPC的启动、稳态和动态性能进行了分析。建立了永磁同步电机驱动系统的实验室样机,验证了控制器的性能。
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引用次数: 4
NFLMS Algorithm for Solar PV-Battery Based Microgrid With Seamless Operation 基于太阳能光伏电池的微电网无缝运行的NFLMS算法
Gaurav Modi, Shailendra Kumar, Bhim Singh
This paper proposes a new control of a three phase solar PV-battery based microgrid. This microgrid has the capability of seamless transfer of power when the system mode of operation changes from grid connected mode to standalone mode and vice-versa. It provides an uninterruptible power to the load even in the absence of the grid and solar PV power. It also provides the power quality features at the point of common coupling (PCC) by mitigating the current harmonics drawn by the nonlinear load. The voltage source converter (VSC) works in a current controlled mode when the grid is present. However, in the absence of the grid, the VSC works in voltage controlled mode. In the current controlled mode, the normalized fractional least mean square (NFLMS) algorithm is used to estimate the load active fundamental component. An additional feed-forward term is used to improve the system dynamic in the inconsistent solar PV array output condition. In the voltage controlled mode, the synchronous rotating frame (SRF) based control algorithm is used to maintain the rated voltage across the load at rated frequency. An enhanced phase locked loop (EPLL) is used for the resynchronization process. The performance of the microgrid is validated by experimental results in various dynamics conditions.
本文提出了一种基于三相太阳能光伏电池的微电网控制方法。该微电网具有系统运行模式从并网模式转变为独立模式时的无缝输电能力,反之亦然。即使在没有电网和太阳能光伏发电的情况下,它也可以为负载提供不间断的电力。它还通过减轻非线性负载产生的电流谐波,提供了在共耦合点(PCC)的电能质量特征。当电网存在时,电压源变换器(VSC)工作在电流控制模式下。然而,在没有电网的情况下,VSC工作在电压控制模式下。在电流控制模式下,采用归一化分数阶最小均方(NFLMS)算法估计负载主动基分量。在太阳能光伏阵列输出不一致的情况下,通过增加前馈项来改善系统的动态特性。在电压控制模式下,采用基于同步旋转框架(SRF)的控制算法,在额定频率下维持整个负载的额定电压。再同步过程采用增强型锁相环(EPLL)。实验结果验证了微电网在各种动态条件下的性能。
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引用次数: 0
A real-life experience on 2nd life batteries services for Distribution System Operator 为配电系统操作员提供二次电池服务的真实体验
T. Bragatto, M. Cresta, V. Croce, M. Paulucci, F. Santori, D. Ziu
This paper proposes an innovative use of the 2nd life Li-ion batteries, enabling "Storage as a service" for enhancing distribution network operations. Two different use cases have been evaluated at the Distribution System Operator (DSO) of the city of Terni (Italy) during the H2020 ELSA project: in the first one, the DSO manages the battery storage system to provide ancillary services (e.g., balance of Reactive Power, primary reserve) in order to increase the power quality and improve of the Low Voltage management efficiency; in the second use case, the batteries are leveraged by the District Energy Manager in order to perform peak shaving and power smoothing, implementing a power profile requested by the DSO. Test results have shown that 2nd life Li-ion batteries are suitable for some services and their usage in the power distribution network is promising for widespread applications. The experimentation on District Energy Manager is being continued under the work of the H2020 eDREAM project.
本文提出了二次寿命锂离子电池的创新用途,使“存储即服务”能够增强配电网的运营。在H2020 ELSA项目中,意大利泰尔尼市的配电系统运营商(DSO)对两种不同的用例进行了评估:第一个用例中,DSO管理电池存储系统以提供辅助服务(例如,无功功率平衡,主备用),以提高电能质量和提高低压管理效率;在第二个用例中,区域能源经理利用电池来执行调峰和平滑功率,实现DSO要求的功率配置。测试结果表明,二次寿命锂离子电池适用于某些服务,其在配电网中的应用有望得到广泛应用。区域能源管理器的实验正在H2020 eDREAM项目的工作下继续进行。
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引用次数: 8
The Smart Grid Semantic Platform: Synergy between IEC Common Information Model (CIM) and Big Data 智能电网语义平台:IEC通用信息模型(CIM)与大数据的协同
E. Bionda, C. Tornelli, M. Brambilla, Marco Balduini, G. Mauri, D. D. Giustina, F. Garrone, Emanuele Della Valle
Recent innovations in Information Technology, Cloud Computing, Big Data analysis, Internet of Things (IoT) and Artificial Intelligence (AI) are enabling technological solutions that were previously unimaginable, or usually available only for big IT companies, with impacts in both industry and services. The demonstrator named Smart Grid Semantic Platform (SGSP) has been created using these technologies integrating several aspects of the management of an electricity distribution network. The services deployed on the platform concern the visualization of the topographic data and electricity grid assets, as well as the processing and displaying of historical data related to the operation of the networks and/or the result of Big Data analysis. This paper demonstrates how useful the synergy is between the standard semantic model of the electric network (IEC CIM 61968) and the historical data of the time series of medium voltage electricity consumption analyzed using a Big Data platform. Specifically it illustrates the realization of a use case about the calculation of a load index of the electric lines.
最近在信息技术、云计算、大数据分析、物联网(IoT)和人工智能(AI)方面的创新正在实现以前难以想象的技术解决方案,或者通常只有大型IT公司才能获得,对工业和服务都有影响。这个名为智能电网语义平台(SGSP)的演示器是利用这些技术创建的,该技术集成了配电网络管理的几个方面。部署在平台上的服务涉及地形数据和电网资产的可视化,以及与网络运行和/或大数据分析结果相关的历史数据的处理和显示。本文展示了电力网络的标准语义模型(IEC CIM 61968)与使用大数据平台分析的中压电力消耗时间序列的历史数据之间的协同作用是多么有用。具体说明了电力线路负荷指标计算用例的实现。
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引用次数: 4
Operational Cost of Primary Power Supply Equipment as Planning Driver 作为计划驱动的一次供电设备运行成本
S.A. Al-Askari
This paper presents an asset planning approach for managing a primary power supply equipment from economical point of view. The technical and economic analyses are illustrated through a case study comparing two options applicable for an aged power transformer, replacement versus complete overhauling. Initial investment, cost of overhauling, and operation and maintenance are the main inputs to the developed economic model.
从经济角度出发,提出了一次供电设备资产规划管理方法。通过一个案例研究,比较了适用于老旧电力变压器的两种选择,即更换和彻底检修,说明了技术和经济分析。初始投资、大修成本和运行维护成本是发达经济模式的主要投入。
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引用次数: 0
期刊
2019 IEEE International Conference on Environment and Electrical Engineering and 2019 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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