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2019 International Conference on Smart Energy Systems and Technologies (SEST)最新文献

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Adaptive Coordination Mechanism of Overcurrent Relays using Evolutionary Optimization Algorithms for Distribution Systems with DGs 基于进化优化算法的配电系统过流继电器自适应协调机制
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849052
Dinar Orazgaliyev, Aidar Tleubayev, Baiken Zholdaskhan, H. K. Nunna, Aresh Dadlani, S. Doolla
Directional current relays are one of the most common relays that are used in the protection of transmission and distribution lines. They provide reliable protection for the transmission lines. However, increasing proliferation of distributed energy sources may violate established relay coordination. This is caused by changes in fault current levels at the fault points, and thus coordination time interval of the relays are violated. This basically means that primary and backup relays do not operate in coordination with each other. Thus, it is vital to optimizing the relay settings in accordance with changing fault current levels. This paper proposes agent-based adaptive coordination mechanism of relay settings acquired by heuristic optimization algorithms in case of 19 bus IEEE test feeder with the presence of distributed generations.
定向电流继电器是最常用的继电器之一,用于保护输配电线路。它们为输电线路提供可靠的保护。然而,分布式能源的不断扩散可能会破坏既定的中继协调。这是由于故障点的故障电流电平发生了变化,从而违反了继电器的协调时间间隔。这基本上意味着主继电器和备用继电器不相互协调地工作。因此,根据不断变化的故障电流水平优化继电器设置是至关重要的。针对19总线IEEE测试馈线存在分布式代的情况,提出了基于agent的启发式优化算法获取中继整定的自适应协调机制。
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引用次数: 8
Using Smart Meters for Distribution Grid State Estimation 利用智能电表进行配电网状态估计
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849096
B. Matthiss, Jonathan Erb, J. Binder
To estimate the grid state often pseudo-measurements based on standard-load-profiles combined with PV-generation estimates are used. To increase the accuracy of the grid state estimation further measurement units can be introduced into the grid. To ensure a cost-effective operation of the grid, a near-optimal placement of the measurements is important. In this paper, different meter placement strategies with the goal to increase the estimation accuracy with minimal investment are applied to a German distribution grid and compared. As a result, the effectiveness of the placement strategies on the estimation accuracy are compared and benchmarked in regards to the computational efficiency, resulting in estimation accuracy and investment costs.
为了估计电网状态,通常使用基于标准负荷分布和光伏发电估计相结合的伪测量。为了提高网格状态估计的精度,可以在网格中引入进一步的测量单元。为了确保电网的经济有效运行,测量的接近最佳位置非常重要。本文以德国某配电网为例,对以最小投资提高估算精度为目标的不同电表放置策略进行了比较。从计算效率的角度比较了不同放置策略对估计精度的影响,从而得出了估计精度和投资成本。
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引用次数: 10
A Comparison of MILP and Metaheuristic Approaches for Implementation of a Home Energy Management System under Dynamic Tariffs 动态电价下家庭能源管理系统实施的MILP与元启发式方法比较
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849064
Vahid Rasouli, Ivo Gonçalves, C. H. Antunes, Á. Gomes
This paper compares two different methodological approaches - a mixed-integer linear programing (MILP) model and a metaheuristic (a genetic algorithm, GA) – to be embedded in a Home Energy Management System (HEMS) with the aim to make the integrated optimization of energy resources under dynamic tariffs. Different types of demand-side resources, including shiftable, interruptible and thermostatically controlled loads as well as local generation and storage, have been considered. The objective is to minimize the electricity cost including the monetization of the dissatisfaction of end-users with possible changes of load operation. Since these two objectives are in conflict, a compromise solution is sought according to the end-user's profile. Different end-users' preferences are considered embodying different sensitivity levels of end-users to the cost and the energy service satisfaction.
本文比较了两种不同的方法方法-混合整数线性规划(MILP)模型和元启发式(遗传算法,GA) -嵌入到家庭能源管理系统(HEMS)中,目的是在动态电价下对能源资源进行综合优化。考虑了不同类型的需求侧资源,包括可移动、可中断和恒温控制负载以及本地发电和存储。目标是最大限度地减少电力成本,包括最终用户对负荷运行可能发生的变化的不满货币化。由于这两个目标是相互冲突的,因此要根据最终用户的情况寻求折衷的解决方案。考虑不同的终端用户偏好,体现了终端用户对成本和能源服务满意度的不同敏感程度。
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引用次数: 14
Model Predictive Control for the Energy Management of A Hybrid PV/Battery /Fuel Cell Power Plant 光伏/电池/燃料电池混合电厂能量管理的模型预测控制
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849051
Adriana Aguilera Gonzalez, Matias Bottarini, I. Vechiu, Lucas Gautier, Ludovic Ollivier, Loic Larre
In this paper, an energy management system (EMS) of a grid-connected hybrid system, based on MPC methodology is presented. This approach is a control system based on the storage system model, which predicts the future output behavior of the storage system handling the power balance between the electricity supplied by the hybrid plant and the demand. This EMS aims to minimize electricity consumption from the grid by producing and consuming as much as possible renewable energy. To comply this, the hybrid power plant combines photovoltaic panels (PV), Li-Ion batteries and a chain of hydrogen (fuel cell, electrolyzer and hydrogen tank). The proposed control strategy has been implemented and tested using the Matlab/Simulink environment.
提出了一种基于MPC方法的并网混合动力系统能量管理系统。该方法是一个基于存储系统模型的控制系统,它预测存储系统处理混合电厂供电与需求之间的功率平衡的未来输出行为。该EMS旨在通过生产和消耗尽可能多的可再生能源来最大限度地减少电网的电力消耗。为了满足这一要求,混合动力发电厂结合了光伏板(PV)、锂离子电池和氢链(燃料电池、电解槽和氢罐)。所提出的控制策略已在Matlab/Simulink环境下进行了实现和测试。
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引用次数: 6
Research on the Switching Process and Unanticipated Transient Event for Repurposing an AC Cable with DC-link in Distribution Network 配电网交流电缆与直流电缆互用的交换过程及非预期暂态事件研究
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849113
T. E. D. de Oliveira, F. van Overbeeke, V. Ćuk, E. D. de Jong
This paper presents new approaches to determine the technical advantages of the switching operating, mainly in DC mode, due to any unanticipated transients, such as voltage dips, in a FDCL system. Thus, while using the DC operation voltage dip caused by either a fault in the upstream or downstream networks can be mitigated. In the case of voltage dips, the Voltage Source Converters (VSCs) must be able to ride-through the events to avoid a system short-interruption from a transient event. The aim of this paper is to broaden current knowledge for the case of a dip at the MV/LV substation at the point common coupling (PCC), where the VCSs should work to maintain the DC-side voltage and potentially also feed in reactive power to the upstream fault in order to minimize the dip penetration. Having this in mind, the DC-link is used to maintain the network throughout these events, thus an upstream dip should not have whichever effect on the medium voltage distribution network or even trip the system through its philosophy protection. Moreover, this paper sheds new light on the switching operation and its advantages through performance tests conducted in a smart grid laboratory using the flexible AC/DC-link in MV level.
本文提出了新的方法来确定开关操作的技术优势,主要是在直流模式下,由于任何意外的瞬变,如电压下降,在FDCL系统。因此,在使用直流操作电压下降时,可以减轻由上游或下游网络中的故障引起的电压下降。在电压下降的情况下,电压源转换器(vsc)必须能够穿越这些事件,以避免系统因瞬态事件而短暂中断。本文的目的是拓宽当前对中压/低压变电所在共耦合点(PCC)处的电压下降情况的了解,在PCC处,vdc应该工作以维持直流侧电压,并可能向上游故障馈送无功功率,以尽量减少电压下降。考虑到这一点,直流链路用于在这些事件中维持网络,因此上游dip不应该对中压配电网产生任何影响,甚至通过其哲学保护跳闸系统。此外,本文还通过在智能电网实验室进行的毫伏级柔性交/直流链路的性能测试,揭示了开关操作及其优点。
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引用次数: 1
Branch Grouping Algorithm for Enhancing Reliability of the Distribution System Restoration 提高配电系统恢复可靠性的分支分组算法
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849049
Yerassyl Olzhabay, Bexultan Nursultan, H. K. Nunna, S. Doolla
The radial distribution design is one of the most used grid types, and a single branch fault in the network may disconnect downstream portion of the system. Therefore, an efficient and quick restoration plan is required when fault is occurred. This paper proposes new branch grouping algorithm (BGA), which is based on the topology of the network. BGA may be used for fastening the restoration of the distribution grid. Case study considers a single switch solution using tie-lines for single branch fault scenarios for IEEE 33-bus and 69-bus distribution systems. Results reveal that scenario calculation time for offline solutions in the larger system is decreased thrice.
径向分布设计是最常用的电网类型之一,网络中的单个分支故障可能导致系统下游部分断开。因此,需要在故障发生时制定高效、快速的恢复方案。提出了一种基于网络拓扑结构的分支分组算法(BGA)。BGA可用于固定配电网的恢复。案例研究考虑了在IEEE 33总线和69总线配电系统的单分支故障场景中使用联络线的单开关解决方案。结果表明,在大型系统中,离线方案的场景计算时间缩短了三倍。
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引用次数: 3
Classification of Power Quality Disturbances using Hilbert Huang Transform and a Multilayer Perceptron Neural Network Model 基于Hilbert Huang变换和多层感知器神经网络模型的电能质量扰动分类
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849114
M. Rodriguez, John Felipe Sotomonte, J. Cifuentes, M. Bueno-López
Disturbances in power quality have increased due to the use of electronic equipment, causing deviations in current and voltage waveforms, which can cause many failures and damage to equipment used in different demand points. Therefore, an efficient disturbance detection method is required in order to provide relevant information regarding its ocurrence. However, there are many difficulties detecting disturbances throughout traditional data extraction methods. These methods have not been able to perform the detection process with the efficiency, speed and accuracy required for this type of work, due to the non-stationary and non-linear behavior of these disturbances. In this study, the Hilbert-Huang Transform and the Multilayer Perceptron Neural Network model are implemented in order to detect and classify disturbances in power quality. Eight common types of disturbances were analyzed based on the parameters stated in the IEEE 1159 standard. By means of instantaneous frequencies and intrinsic mode functions of each disturbance, the neural network is trained for the classification of these disturbances. The implemented method reached a precision percentage of 94.6, demonstrating the versatility and great potential that this method provides when detecting disturbances in power quality.
由于电子设备的使用,电能质量的干扰增加了,导致电流和电压波形的偏差,这可能导致在不同需求点使用的设备出现许多故障和损坏。因此,需要一种有效的干扰检测方法,以提供有关其发生的相关信息。然而,传统的数据提取方法在检测干扰方面存在许多困难。由于这些干扰的非平稳和非线性行为,这些方法无法以此类工作所需的效率,速度和准确性执行检测过程。在本研究中,采用Hilbert-Huang变换和多层感知器神经网络模型来检测和分类电能质量中的干扰。根据IEEE 1159标准中规定的参数,分析了八种常见的干扰类型。利用扰动的瞬时频率和固有模态函数,训练神经网络对扰动进行分类。所实现的方法达到了94.6的精度百分比,证明了该方法在检测电能质量干扰时的通用性和巨大潜力。
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引用次数: 16
Elasticity Parameter Definition and Analysis for Real-Time Pricing Remuneration Basing on Different Users Cases 基于不同用户案例的实时定价报酬弹性参数定义与分析
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849109
Pierfrancesco Corsi, P. Faria, Z. Vale
In the last decade Demand Response (DR) programs have been influencing loads' profiles of electric users who participate in these programs. The evolution of the simulations able to study them brought to the possibility of defining new models that can consider power consumption profiles for different types of user (MAT, AT, MT, BTE, BTN-2, BTN-1) but, in order to better match consumption and production energy curves, highly precise predictions of loads' profiles are still needed. This goal can be achieved also thanks to the study of the price elasticity factor. A way to obtain it will be examined in this paper: price and power absorption variations will be considered because elasticity is defined as the ratio of their relative variations before and after DR. This work focuses on the profiles of price variations $mathbf{Delta} mathbf{P}$ with respect to the absorbed power variation $mathbf{Delta} mathbf{Q}$: users indeed are expected to vary their consumptions according to different values of remunerations. Ranges of elasticities have been evaluated to study the behavior of $mathbf{Delta} mathbf{P}$ profiles for the more representing users. Finally, economic consequences of load regressions have been analyzed.
在过去的十年中,需求响应(DR)计划已经影响了参与这些计划的电力用户的负荷概况。能够研究它们的模拟的发展带来了定义新模型的可能性,这些模型可以考虑不同类型用户(MAT, AT, MT, BTE, BTN-2, BTN-1)的功耗分布,但是,为了更好地匹配消耗和生产能量曲线,仍然需要对负载分布进行高度精确的预测。这一目标也可以通过对价格弹性因素的研究来实现。本文将研究获得它的一种方法:将考虑价格和功率吸收变化,因为弹性被定义为它们在dr前后的相对变化的比率。这项工作侧重于价格变化$mathbf{Delta} mathbf{P}$相对于吸收功率变化$mathbf{Delta} mathbf{Q}$的概况:用户确实预计会根据不同的报酬值改变他们的消费。对弹性范围进行了评估,以研究$mathbf{Delta} mathbf{P}$概要文件对更具代表性的用户的行为。最后,分析了负荷回归的经济后果。
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引用次数: 2
Hierarchical Control Structure for Optimising Building Microgrid Self-consumption 建筑微电网自耗优化的分层控制结构
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849054
Daniela Yassuda Yamashita, I. Vechiu, J. Gaubert
Renewable energy sources are increasingly deployed as distributed generators, restructuring the traditional electrical grid toward smart grids. Their intermittent power generation makes difficult the development of a complete carbon-free MicroGrid. Hence, aiming to keep the safe operation of a building MicroGrid (BMG) under stochastic variations in the power imbalance while respecting the requirements imposed by grid regulation to maximise self-consumption, a three-level energy management system was designed. The BMG main grid interaction aspects are assured by the two upper control level throughout a hierarchical model predictive control, whereas the power sharing among all electric vehicles is ensured via a deterministic state machine. The entire hierarchical control structure was tested through simulation in MATLAB under different scenarios. Results prove that the proposed control allows the BMG to keep its self-consumption index within expected boundaries despite environmental disturbances.
可再生能源越来越多地作为分布式发电机部署,将传统电网重构为智能电网。它们的间歇性发电使完全无碳微电网的发展变得困难。因此,为了保证建筑微电网在电力不平衡随机变化下的安全运行,同时尊重电网监管要求,最大限度地提高自用能耗,设计了一个三级能量管理系统。BMG主电网交互方面由两个上层控制层通过分层模型预测控制来保证,而所有电动汽车之间的电力共享则通过确定性状态机来保证。在MATLAB中对整个分层控制结构进行了不同场景下的仿真测试。结果表明,所提出的控制方法可以使BMG在受到环境干扰的情况下保持其自耗指标在预期范围内。
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引用次数: 0
Congestion relief market model based on load biddings 基于负荷竞价的拥堵缓解市场模型
Pub Date : 2019-09-01 DOI: 10.1109/SEST.2019.8849024
G. Marco Tina, C. F. Nicolosi, P. Siano
In an ever more complex, deregulated and challenging electrical energy environment, new technical and economic solutions must be investigated to ensure the stability and reliability of power systems. In this context other resources such as renewable power plants and electrical loads should be involved to provide ancillary services on the basis of new markets rules. Specifically, electrical loads should modify their consumption patterns thanks to the possibility to earn money from the participation to ancillary services markets in competition with traditional power plants. This work proposes a market for the resolution of congestions where electrical loads are also involved. The study partly simulates what will actually happen in the Italian ancillary services market (MSD), where electrical loads will be active players. From a technical point of view, congestions are resolved by selecting the load's bids using technical-economic indices calculated from the Transmission Loading Relief (TLR) sensitivity analysis. The effectiveness of the proposed method is verified by carrying out some simulation results on the IEEE 24 bus reliability verification system.
在一个更加复杂,放松管制和具有挑战性的电力环境中,必须研究新的技术和经济解决方案,以确保电力系统的稳定性和可靠性。在这方面,应利用可再生能源发电厂和电力负荷等其他资源,根据新的市场规则提供辅助服务。具体来说,电力负荷应该调整自己的消费模式,因为有可能通过参与辅助服务市场与传统电厂竞争来赚钱。这项工作提出了解决电力负荷也涉及的拥堵的市场。该研究部分模拟了意大利辅助服务市场(MSD)的实际情况,其中电力负荷将成为活跃的参与者。从技术角度来看,通过利用输电负荷缓解(TLR)敏感性分析计算的技术经济指标选择负荷标价来解决拥塞问题。在IEEE 24总线可靠性验证系统上进行了仿真实验,验证了该方法的有效性。
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引用次数: 0
期刊
2019 International Conference on Smart Energy Systems and Technologies (SEST)
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