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2020 IEEE Power & Energy Society General Meeting (PESGM)最新文献

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Impact Assessment of Power Electronic-based Generation Units on Harmonic Response of Power Systems Using SVD based Method 基于奇异值分解的电力电子发电机组对电力系统谐波响应影响评估
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281443
Armando D.T. Acosta, A. Perilla, E. Rakhshani, J. R. Torres, M. Meijden
The connection of offshore wind turbines to the European grid has been growing in the recent years. Many European countries are adopting this renewable energy and are increasing the number of wind power plant additions into their electrical transmission networks. In this paper, the impacts of harmonic frequencies introduced by the wind parks in a low-inertia grid are studied. Despite of classical methods which are mainly based on single-input single-output (SISO) systems, a novel approach, based on Singular Value Decomposition (SVD) techniques, considering a multiple-input multiple-output (MIMO) system is presented and discussed. The proposed SVD is a powerful mathematical tool to discover the harmonic frequencies. It can be used to analyse the system at a certain harmonic frequency and show which input(s) of the system will have more influence in the system dynamics and which output(s) will be the most affected by that input(s). According to the presented study, an SVD based methodology is provided to model any electrical network via its passive electrical elements, and to perform a harmonic analysis.
近年来,海上风力涡轮机与欧洲电网的连接一直在增长。许多欧洲国家正在采用这种可再生能源,并在其电力传输网络中增加风力发电厂的数量。本文研究了低惯性电网中风电场引入的谐波频率对电网性能的影响。摘要针对传统的多输入多输出(MIMO)系统分析方法,提出并讨论了一种基于奇异值分解(SVD)的多输入多输出(MIMO)系统分析方法。所提出的奇异值分解是发现谐波频率的有力数学工具。它可以用来分析某一谐波频率下的系统,并显示系统的哪个输入对系统动力学的影响更大,哪个输出受该输入的影响最大。在此基础上,提出了一种基于奇异值分解的方法,通过无源电元件对电网进行建模,并进行谐波分析。
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引用次数: 0
Distribution System Topology Identification for DER Management Systems Using Deep Neural Networks 基于深度神经网络的DER管理系统配电系统拓扑识别
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9282121
Mohammad Jafarian, Alireza Soroudi, A. Keane
For DER management systems (DERMS) to manage and coordinate the DER units, awareness of distribution system topology is necessary. Most of the approaches developed for the identification of distribution network topology rely on the accessibility of network model and load forecasts, which are logically not available to DERMS. In this paper, the application of deep neural networks in pattern recognition is availed for this purpose, relying only on the measurements available to DERMS. IEEE 123 node test feeder is used for simulation. Six switching configurations and operation of two protective devices are considered, resulting in 24 different topologies. Monte Carlo simulations are conducted to explore different DER production and load values. A two-hidden layer feed-forward deep neural network is used to classify different topologies. Results show the proposed approach can successfully predict the switching configurations and status of protective devices. Sensitivity analysis shows that the positive and negative sequence components of the voltage (from DER units and substation) have the most contribution to discrimination among different switching configurations.
分布式电源管理系统(DERMS)要对分布式电源单元进行管理和协调,必须了解配电系统的拓扑结构。大多数用于配电网拓扑识别的方法依赖于网络模型的可访问性和负荷预测,这在逻辑上是不可用的。在本文中,深度神经网络在模式识别中的应用是为此目的,仅依赖于DERMS可用的测量。采用IEEE 123节点测试馈线进行仿真。考虑六种开关配置和两个保护装置的操作,产生24种不同的拓扑结构。通过蒙特卡罗模拟,探索了不同的DER生成和负载值。采用两隐层前馈深度神经网络对不同的拓扑结构进行分类。结果表明,该方法能较好地预测保护装置的开关配置和状态。灵敏度分析表明,电压的正负序分量(来自DER机组和变电站)对不同开关配置的区分贡献最大。
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引用次数: 9
Toward a MILP Modeling Framework for Distribution System Restoration 配电系统恢复的MILP建模框架研究
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281837
Bo Chen, Z. Ye, Chen Chen, Jianhui Wang
Large-scale blackouts and extreme weather events in recent decades raise the concern for improving the resilience of electric power infrastructures. Distribution service restoration (DSR), a fundamental application in outage management systems, provides restoration solutions for system operators when power outages happen. As distribution generators (DGs) and remotely controllable devices are increasingly installed in distribution systems, an advanced DSR framework is needed to perform optimally coordinated restoration that can achieve maximal restoration performance. This paper introduces a DSR modeling framework, which can generate optimal switching sequences and estimated time of restoration in the presence of remotely controllable switches, manually operated switches, and dispatchable DGs. Two mathematical models, a variable time step model and a fixed time step model, are presented and compared. The proposed models are formulated as a mixed-integer linear programming model, and their effectiveness is evaluated via the IEEE 123 node test feeder.
近几十年来,大规模停电和极端天气事件引起了人们对提高电力基础设施恢复能力的关注。配电服务恢复(DSR)是停电管理系统中的一项基本应用,它为系统操作员提供停电时的恢复解决方案。随着配电发电机和远程控制设备在配电系统中的应用越来越多,需要一个先进的DSR框架来进行最佳协调恢复,以实现最大的恢复性能。本文介绍了一种DSR建模框架,该框架可以在存在远程控制交换机、手动操作交换机和可调度dg的情况下生成最优切换序列和估计恢复时间。给出了变时间步长模型和固定时间步长模型两种数学模型,并进行了比较。提出了一种混合整数线性规划模型,并通过IEEE 123节点测试馈线对其有效性进行了评估。
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引用次数: 0
Deep Reinforcement Learning for Direct Load Control in Distribution Networks 配电网直接负荷控制的深度强化学习
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281703
S. Bahrami, Y. Chen, V. Wong
Direct load control enables load aggregators in distribution networks to remotely curtail customers’ appliances during peak time periods. This paper proposes a direct load control algorithm for residential customers, while accounting for the uncertainties in the customers’ discomfort from curtailing their demand as well as the operational constraints imposed by the distribution network. We model the load control problem as a Markov decision process (MDP). Solving such an MDP is challenging due to the ac power flow equations and the unknown dynamics of the system states (i.e., price, demand, and customer’s discomfort). We develop a deep reinforcement learning algorithm based on the actor-critic method that enables the load aggregator to consider the distribution network constraints and the consequences of its past decisions to update the neural network parameters for the policy and value function without any knowledge of the system dynamics. Simulations are performed on an IEEE 85-bus test feeder with 59 households. Results show that the load aggregator learns to reduce the peak load by 16.7%, while taking into account the distribution network constraints. Also, the customers’ cost is decreased by 26.6% on average; thereby reaching a win-win outcome.
直接负载控制使配电网络中的负载聚合器能够在高峰时段远程减少客户的设备。本文提出了一种针对居民用户的直接负荷控制算法,同时考虑了用户因减少需求而产生的不确定性以及配电网的运行约束。我们将负荷控制问题建模为马尔可夫决策过程(MDP)。由于交流功率流方程和系统状态的未知动态(即价格、需求和客户不适),求解这样的MDP是具有挑战性的。我们开发了一种基于actor-critic方法的深度强化学习算法,该算法使负载聚合器能够在不了解系统动力学的情况下考虑分配网络约束及其过去决策的后果,以更新策略和值函数的神经网络参数。在IEEE 85总线测试馈线上对59户家庭进行了仿真。结果表明,在考虑配电网约束的情况下,负荷聚合器学会了将峰值负荷降低16.7%。客户成本平均降低26.6%;从而达到双赢的结果。
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引用次数: 4
Transient Stability Analysis of Offshore Wind With O&G Platforms and an Energy Storage System 带油气平台和储能系统的海上风电暂态稳定性分析
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281706
Jing Zhong Tee, I. Lim, Keliang Zhou, O. Anaya‐Lara
The integration of offshore floating wind turbine generation (WTG) with offshore O&G platforms in the off-grid configuration which is a business model that is in the process of developing in the North Sea. As such, an integrated system consisting of an offshore floating WTG and O&G production platforms with onboard battery energy storage system (BESS) is proposed in this paper. In simulation, there are 4 different scenarios and results show that conventional system has high transient stability which do not meet the IEC standards for O&G platforms. The simulation has shown proposed system 2 which has incorporated with BESS 1 and BESS 2, has a reduction in transient deviation that can meets the IEC standards. In addition, capital expenditure (CapEx) and operational expenditure (OpEx) of proposed system 2 is presented in this paper.
海上浮式风力发电(WTG)与海上油气平台在离网配置中的集成是北海正在发展的一种商业模式。因此,本文提出了一种由海上浮式WTG和油气生产平台以及机载电池储能系统(BESS)组成的集成系统。仿真结果表明,常规系统具有较高的暂态稳定性,不符合油气平台IEC标准。仿真结果表明,将BESS 1和BESS 2集成在一起的系统2能够有效降低暂态偏差,满足IEC标准。此外,本文还介绍了拟议系统2的资本支出(CapEx)和运营支出(OpEx)。
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引用次数: 5
Hierarchical Frequency Control in Multi-Area Power Systems with Prioritized Utilization of Inverter Based Resources 基于逆变器资源优先利用的多区域电力系统分层频率控制
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281861
Rahul Chakraborty, A. Chakrabortty, E. Farantatos, Mahendra Patel, H. Hooshyar
We propose a new hierarchical frequency control design for multi-area power system models integrated with renewable energy resources. Primary control is proposed based on fast re-dispatch of available headroom in the renewable capacity following a contingency. Secondary control is applied using a new optimization-based approach named Area Prioritized Power Flow (APPF). The APPF methodology prioritizes and maximizes the utilization of area-specific Inverter Based Resources (IBRs). Results are validated using simulations of a 9-machine, 6-IBR, 33-bus, 3-area power system model to show that APPF ensures better steady-state performance, while the hierarchical actuation of IBR setpoints improves the dynamic frequency response performance. The overall scheme mitigates a disturbance faster and more efficiently by prioritizing the use of local area-resources.
针对可再生能源集成的多区域电力系统模型,提出了一种新的分层频率控制设计。提出了一种基于突发事件后可再生容量可用净空量快速再调度的主控制方法。二次控制采用了一种新的基于优化的方法,称为区域优先潮流(APPF)。APPF方法优先考虑并最大限度地利用特定区域的基于逆变器的资源(ibr)。通过对9机、6 IBR、33总线、3区域电力系统模型的仿真验证,结果表明,APPF能保证较好的稳态性能,而IBR设定值的分层驱动提高了动态频响性能。整体方案通过优先利用当地资源,更快、更有效地减轻干扰。
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引用次数: 1
The Distribution Network Coordinated Operation Considering Distributed Energy Storage System Integration 考虑分布式储能系统集成的配电网协同运行
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281732
Haijun Xing, H. Fan, Ranlong Guo, Jing Wang
Distributed energy storage system (DESS) becomes more and more popular in the distribution network, especially in the era with largely increased the renewable energies. This paper proposed the day-ahead coordinated operation method of active distribution network considering distributed energy storage system integration and network reconfiguration. The objective is to minimize the energy loss of distribution network within one day. The DESS optimal operation model is proposed. The network reconfiguration considered in this paper is a multiple time segment reconfiguration. The purpose is to find a topology structure which can adapt to the load and DG variety within 24 hours. The proposed model and algorithm is verified with a TPC 84-bus system, the different switch operation times and different substation voltages are discussed. The results show the adaptability of the proposed methodology and the necessity to include the DESS and network reconfiguration in the coordinated operation.
分布式储能系统(DESS)在配电网中越来越受欢迎,特别是在可再生能源大量增加的时代。提出了考虑分布式储能系统集成和网络重构的有源配电网日前协调运行方法。目标是使配电网在一天内的能量损失最小化。提出了DESS优化运行模型。本文考虑的网络重构是一个多时间段重构。目的是寻找一种能够适应24小时内负载和DG变化的拓扑结构。以tpc84母线系统为例,对所提出的模型和算法进行了验证,并对不同开关操作次数和不同变电站电压进行了讨论。结果表明了所提方法的适应性,以及在协调运行中考虑DESS和网络重构的必要性。
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引用次数: 0
Spatiotemporal Pattern Recognition in the PMU Signals in the WECC system WECC系统中PMU信号的时空模式识别
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281440
Z. Hou, H. Ren, Heng Wang, P. Etingov
Phasor measurement unit (PMU) data has been used by multiple power system applications, including state estimation, post event analysis, oscillation detection, model validation, and many others. Still, due to the big data nature and availability to general research institutions, comprehensive understanding of the spatiotemporal patterns in PMU signals and underlying mechanisms are incomplete. This study applies a set of signal processing and machine learning approaches aiming at deciphering the characteristic behaviors of multiple PMU attributes (e.g., voltage, frequency, rate of change of frequency, phase angle), including their auto-correlation, cross-dependence, similarities and discrepancies across units and temporal scales, and distributions of anomalies and their linkages to potential external factors such as weather events. Data analytics are applied to PMUs from the U.S. Western Electricity Coordinating Council (WECC) system. The PMU measurements, recorded events, and weather extremes are all from real-world datasets. The findings from the study and mechanistic understanding of the PMU dynamics help provide guidance on system control or preventing blackouts. The derived metrics can be directly used for adjusting or filtering simulated PMU data used for advanced algorithm development.
相量测量单元(PMU)数据已被多种电力系统应用所使用,包括状态估计、事后分析、振荡检测、模型验证等。然而,由于大数据的性质和一般研究机构的可用性,对PMU信号的时空模式及其潜在机制的全面理解尚不完整。本研究采用了一套信号处理和机器学习方法,旨在解读多个PMU属性(如电压、频率、频率变化率、相位角)的特征行为,包括它们在单位和时间尺度上的自相关性、相互依赖性、相似性和差异性、异常分布及其与潜在外部因素(如天气事件)的联系。数据分析应用于美国西部电力协调委员会(WECC)系统的pmu。PMU测量、记录的事件和极端天气都来自真实世界的数据集。研究结果和PMU动力学的机制理解有助于为系统控制或防止停电提供指导。派生的度量可以直接用于调整或过滤用于高级算法开发的模拟PMU数据。
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引用次数: 1
Automated Integrated Analysis of Condition and Capacity of Low-Voltage Networks 低压电网状态与容量的自动化综合分析
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281792
Maikel H. P. Klerx, Jeroen van Tongeren, J. Morren, H. Slootweg
Investigation of both capacity and quality of low-voltage networks is becoming more important. Previous research showed that condition assessment of low voltage (LV) grids is promising, but not sufficient yet to base asset management decisions on – due to limitations in data availability and quality and a low amount of failures. This paper presents a method which combines a condition assessment approach with a method to investigate the capacity of LV networks. The capacity method uses a bottom-up approach to predict if and when LV assets get overloaded. The combined approach ranks assets on the basis of expected condition and capacity bottlenecks. Results of a case study show among others an overlap of 45% of condition and capacity bottlenecks. It is proved that the presented combined approach is a useful, well-functioning and applicable approach for the asset management of LV distribution grids. This result follows up on and expands previous research.
对低压电网容量和质量的研究变得越来越重要。先前的研究表明,低压电网的状态评估是有前途的,但由于数据可用性和质量的限制以及低故障数量,还不足以作为资产管理决策的基础。本文提出了一种将状态评估法与低压电网容量研究方法相结合的方法。容量方法使用自底向上的方法来预测低压资产是否以及何时过载。该组合方法根据预期条件和容量瓶颈对资产进行排序。一个案例研究的结果显示,其中45%的条件和容量瓶颈是重叠的。实践证明,该方法是低压配电网资产管理的一种有效、实用的方法。这一结果是对先前研究的延续和扩展。
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引用次数: 0
Rethinking Consumer-Centric Markets Under Uncertainty: A Robust Approach to Community-Based Energy Trades 重新思考不确定性下以消费者为中心的市场:以社区为基础的能源交易的稳健方法
Pub Date : 2020-08-02 DOI: 10.1109/PESGM41954.2020.9281541
I. Onugha, S. Dehghan, P. Aristidou
The flexibility of the end users in the electricity markets is becoming more pertinent with the evolution of market mechanisms allowing consumers to participate actively. The advent of Distributed Energy Resources (DERs) and energy storage systems is gradually and continuously changing the roles of the market operators. The impact of the uncertainty of DERs and load demands on community-based market structures has not been fully investigated. In this paper, we propose a robust solution to community-based market operations under uncertainty and compare the optimal decisions on energy trades with deterministic, stochastic, and opportunistic models. Also, we employ the Taguchi’s orthogonal array testing (TOAT) to generate proficient scenarios from uncertain variables of prosumers. The proposed method is tested on a community-based microgrid with 15 prosumers assuming a single-rate tariff structure. Simulation results demonstrate the cost of robustness and the impact of uncertainty.
随着允许消费者积极参与的市场机制的发展,终端用户在电力市场中的灵活性变得越来越重要。分布式能源(DERs)和储能系统的出现正在逐步、持续地改变着市场运营商的角色。电力需求和负荷需求的不确定性对社区市场结构的影响尚未得到充分研究。本文提出了不确定性条件下基于社区的市场运作的鲁棒解,并比较了确定性、随机和机会主义模型下能源交易的最优决策。此外,我们采用田口正交阵列检验(Taguchi’s orthogonal array testing, TOAT)从产消者的不确定变量中生成熟练情境。所提出的方法在一个基于社区的微电网上进行了测试,该微电网有15个产消者,假设采用单一费率的电价结构。仿真结果验证了鲁棒性的代价和不确定性的影响。
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引用次数: 1
期刊
2020 IEEE Power & Energy Society General Meeting (PESGM)
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