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2017 Australasian Universities Power Engineering Conference (AUPEC)最新文献

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Distribution feeder protection and reconfiguration using multi-agent approach 基于多智能体方法的配电馈线保护与重构
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282425
N. Isherwood, M. Rahman, A. Oo
This paper presents a multi-agent based protection scheme for reconfiguring and restoring the service of distribution feeders through effective fault diagnosis technique. Short-circuit faults occur frequently in power distribution networks and in such a condition, a proper fault detection is very important to either recover the system from collapse or reconfigure and restore the system after an outage. The detection of multiple fault locations in distribution feeders is challenging and time consuming tasks. In this paper, a hierarchy of relay agents and configuration agent is developed to coordinate the protection system operation. The relay agents contribute to the fault detection and isolation processes whereas the configuration agent reconfigures the system to restore maximum possible loads through effective relay coordination via information exchange. An 11 kV open ring distribution feeder is considered as test bed to evaluate the performance. The simulation results indicate that the proposed method can identify multiple faults in the system accurately and reconfigure the system during the event of faults.
通过有效的故障诊断技术,提出了一种基于多智能体的配电馈线重新配置和恢复服务的保护方案。配电网络中短路故障频繁发生,在这种情况下,正确的故障检测对于恢复系统的崩溃状态或在停电后重新配置和恢复系统是非常重要的。配电馈线的多故障位置检测是一项具有挑战性且耗时的任务。本文提出了一种继电代理和组态代理的层次结构来协调保护系统的运行。中继代理有助于故障检测和隔离过程,而配置代理通过信息交换进行有效的中继协调,重新配置系统以恢复最大可能的负载。以11kv开环配电馈线为试验台,对其性能进行了评价。仿真结果表明,该方法可以准确识别系统中的多个故障,并在故障发生时对系统进行重新配置。
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引用次数: 2
Power capacity management of dynamic voltage restorers used for voltage sag and unbalance compensation 用于电压暂降和不平衡补偿的动态电压恢复器的功率容量管理
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282445
Maryam Moradi Far, E. Pashajavid, A. Ghosh
Voltage sag and voltage unbalance can be considered as the major power quality concerns in low voltage distribution networks. A dynamic voltage restorer (DVR) is commonly used to provide voltage support for load buses containing critical loads. In practice, however, the limited power capacity of these devices can highly deteriorate the desirable regulation expected from them, especially under severe disturbances. This paper proposes an efficient fuzzy logic based capacity management scheme for DVRs in mitigating voltage disturbances. The strategy can appropriately organize the DVR operation complying with the features and priorities given by the designer. A novel approach to derive the compensation reference signals is presented in which the mitigation factors associated with the disturbances are adjusted by the fuzzy scheme. Further, a single-step prediction horizon technique is implemented to regulate the switching commands of the DVR. Various simulation cases are studied in MATLAB to demonstrate efficacy of the proposal.
电压暂降和电压不平衡是低压配电网主要的电能质量问题。动态电压恢复器(DVR)通常用于为包含临界负载的负载总线提供电压支持。然而,在实践中,这些设备有限的功率容量会严重破坏期望从它们得到的理想调节,特别是在严重的干扰下。提出了一种有效的基于模糊逻辑的dvr容量管理方案。该策略可以根据设计者给出的特点和优先级,适当地组织DVR的操作。提出了一种新的补偿参考信号的导出方法,该方法利用模糊格式调整与干扰相关的缓解因子。在此基础上,采用单步预测视界技术对DVR的开关指令进行调节。在MATLAB中对各种仿真案例进行了研究,验证了该方案的有效性。
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引用次数: 5
A linear method for determining the hosting capacity of radial distribution systems 一种确定径向配电系统承载能力的线性方法
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282428
Mohammad Seydali Seyf Abad, G. Verbič, Archie C. Chapman, Jin Ma
Steady state over-voltage is a bottleneck in distri-bution networks with high penetration of distributed generation (DG). This paper proposes a novel method based on linear programming (LP) to determine a very good approximation of the maximum DG penetration level in radial distribution networks. First, an analytical expression for maximum penetration level of one DG unit in a feeder is obtained. Then the feasible region for multiple DG units in a feeder is found. The proposed model is tested on two different grids, one of which is an agricultural feeder in Australia. The maximum penetration calculated by this model is compared with a comprehensive power flow method. The results confirm the accuracy of the proposed model. Finally, it is shown that increasing the number of DGs in a feeder may not increase the maximum penetration level.
在分布式发电高普及率的配电网中,稳态过电压是一个瓶颈。本文提出了一种基于线性规划(LP)的新方法来确定径向配电网中最大DG渗透水平的一个很好的近似。首先,得到了一个DG单元在馈线中最大穿透水平的解析表达式。然后找到了一条馈线中多个DG机组的可行区域。提出的模型在两个不同的电网上进行了测试,其中一个是澳大利亚的农业馈线。将该模型计算的最大穿透量与综合潮流法进行了比较。结果证实了所提模型的准确性。最后,结果表明,增加进料器中dg的数量可能不会增加最大穿透水平。
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引用次数: 8
Proposed amendment to IEC/TR 61000.3.6:2008 for harmonic allocation to loads in transmission systems 对IEC/TR 61000.3.6:2008输电系统负载谐波分配的拟议修正案
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282501
T. Vu, D. Robinson, V. Gosbell, S. Perera, R. Memisevic
Ensuring harmonic voltage distortion levels in transmission systems remain below acceptable levels relies on appropriate allocations of emissions to customer loads and bulk supply points. A number of practical issues have been identified with the existing harmonic allocation method for transmission systems in the technical report IEC/TR 61000-3-6:2008, Ed.2: the method to assess the total available power of a busbar, a key component to harmonic allocations, is not intuitive and there is a lack of clarity in the report; the method for sharing planning levels also does not allow unused spare capacity at a busbar to be shared with other busbars in the network to increase their global contribution; and the method for allocation of individual limits does not account for the size and harmonic emission of existing loads connected to a busbar. This paper analyses these issues in detail and proposes some clarification and amendments required for the existing allocation method. A simplified transmission network is provided to clarify how total available power can be assessed, how individual limits can be allocated for multiple loads connected to the same busbar, and to demonstrate that a significant increase in global contribution and subsequently higher individual limits can be achieved.
确保输电系统中的谐波电压失真水平保持在可接受的水平以下,依赖于对客户负载和大宗供应点的适当分配。技术报告IEC/TR 61000-3-6:2008, Ed.2中已经确定了输电系统现有谐波分配方法的一些实际问题:评估母线(谐波分配的关键部件)总可用功率的方法不直观,报告中缺乏清晰度;共享规划水平的方法也不允许母线上未使用的备用容量与网络中的其他母线共享,以增加它们的全局贡献;个别限制的分配方法没有考虑到连接到母线的现有负载的大小和谐波发射。本文对这些问题进行了详细的分析,并对现有的分配方法提出了一些需要澄清和修改的地方。提供了一个简化的传输网络,以阐明如何评估总可用功率,如何为连接到同一母线的多个负载分配单个限制,并证明可以实现全球贡献的显着增加和随后更高的单个限制。
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引用次数: 3
Supplying the load by the optimization of a stand-alone hybrid power system using firefly algorithm considering reliability indices 考虑可靠性指标,采用萤火虫算法对单机混合电力系统进行优化供电
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282462
M. H. Moghaddam, Akhtar Kalam, J. Shi, M. R. Miveh, P. Peidaee
Optimal design of the hybrid power system (HPS) comprising wind turbines, solar arrays and battery storage is proposed in this paper. The main purpose is to develop an effective method for optimizing the size of HPSs considering reliability indices and power balance constraint. A new metaheuristic nature-inspired algorithm, called firefly algorithm (FA) is utilized to achieve these objectives. The results are compared with those obtained by alternative techniques proposed in the literature in order to show that the proposed algorithm is capable of yielding better optimal solutions. The simulation results show that the FA optimization method achieves better results than the alternative optimization methods.
提出了由风力发电机组、太阳能电池阵列和蓄电池组成的混合动力系统的优化设计。主要目的是在考虑可靠性指标和功率平衡约束的情况下,提出一种有效的高压发电机尺寸优化方法。一种新的元启发式自然启发算法,称为萤火虫算法(FA)来实现这些目标。结果与文献中提出的替代技术获得的结果进行了比较,以表明所提出的算法能够产生更好的最优解。仿真结果表明,该优化方法比备选优化方法取得了更好的效果。
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引用次数: 2
Enhanced control of a hydrogen energy storage system in a microgrid 微电网中氢储能系统的增强控制
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282434
A. Ganeshan, D. G. Holmes, Lasantha Gunaruwan Meegahapola, B. Mcgrath
Renewable energy generation based microgrids have significantly increased their share of total energy production in recent times, and this is now leading to major restructuring of traditional electrical grid infrastructures. One critical issue is the intermittency of the available power from renewable energy sources, which has made energy storage systems (ESSs) an important component for microgrids. A hydrogen based energy storage system, consisting of an electrolyser, a hydrogen storage tank and a fuel-cell, is particularly attractive in this context since it can directly store energy from PV sources. This paper now explores the possibility of utilizing the electrolyser of this system for fast response short term energy storage to help support momentary power imbalance within the microgrid. This avoids the extra cost incurred by using more conventional fast storage elements, such as batteries or supercapacitors, and thus offers a more sustainable approach for a microgrid system.
近年来,基于微电网的可再生能源发电在总能源生产中所占的份额显著增加,这正在导致传统电网基础设施的重大重组。一个关键的问题是可再生能源的可用电力的间歇性,这使得储能系统(ess)成为微电网的重要组成部分。由电解槽、储氢罐和燃料电池组成的基于氢的储能系统在这种情况下特别有吸引力,因为它可以直接存储来自PV源的能量。本文现在探索利用该系统的电解槽进行快速响应短期储能的可能性,以帮助支持微电网内的瞬时功率不平衡。这避免了使用更传统的快速存储元件(如电池或超级电容器)所产生的额外成本,从而为微电网系统提供了一种更可持续的方法。
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引用次数: 6
Impacts of network tariffs on distribution network power flows 电网电价对配电网潮流的影响
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282380
Donald Azuatalam, G. Verbič, Archie C. Chapman
In this paper, the impacts of different network tariffs on the consumption pattern of electricity consumers/prosumers and the resultant effects on the distribution network is evaluated. A home energy management system (HEMS) based mixed integer linear programming (MILP) model is developed for 39 customers connected to a low voltage (LV) residential feeder to analyse the impacts of demand and energy-based tariffs on network performance. Results show that tariffs with a peak-demand component perform better in terms of electricity cost reduction for the customer, as well as in reducing peak demand and line loading for networks with high PV-battery penetration levels.
本文评估了不同上网电价对电力消费者/生产消费者消费模式的影响,以及由此对配电网产生的影响。基于混合整数线性规划(MILP)模型的家庭能源管理系统(HEMS)为39个客户连接到一个低压(LV)住宅馈线来分析需求和基于能源的关税对网络性能的影响。结果表明,在为客户降低电力成本方面,具有峰值需求成分的关税表现更好,同时在降低峰值需求和高光伏电池渗透水平的网络线路负载方面也表现更好。
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引用次数: 8
A nonparametric Bayesian model for forecasting residential solar generation 住宅太阳能发电预测的非参数贝叶斯模型
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282508
Thomas Power, G. Verbič
This paper presents a framework for generating synthetic residential solar generation profiles. Using the Dirichlet process, characteristics can be clustered and assigned to unobservable connections in a network. This approach retains the variance of this assignment introduced by sparse data, and allows for profiles to be generated specific to individual characteristics. It is also demonstrated that a Markov process modelling changing solar irradiance can be defined from existing solar generation data, rather than specific solar irradiance data in the event that it is not available. This model was applied to data sourced from Ausgrid's Smart Grid, Smart City Program, and a limited initial application found that profiles specific to assigned characteristics could be generated successfully.
本文提出了一种生成合成住宅太阳能发电剖面的框架。使用狄利克雷过程,特征可以聚类并分配给网络中不可观察的连接。这种方法保留了由稀疏数据引入的分配的差异,并允许生成特定于个体特征的概要文件。还证明了马尔可夫过程建模改变太阳辐照度可以定义从现有的太阳能发电数据,而不是特定的太阳辐照度数据,如果它是不可用的。该模型被应用于来自澳大利亚电网的智能电网,智能城市计划的数据,并在有限的初始应用中发现,可以成功地生成特定于指定特征的配置文件。
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引用次数: 8
Optimal battery size for grid connected rooftop solar photovoltaic systems in South Australia 南澳大利亚并网屋顶太阳能光伏系统的最佳电池尺寸
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282509
Vanika Sharma, M. H. Haque, S. M. Aziz
Recent reduction in feed-in-tariff makes the installation of residential rooftop solar photovoltaic system unattractive without having suitable battery energy storage system. This paper describes a technique of determining the optimal size of battery storage for a typical residential home in South Australia with grid connected rooftop solar photovoltaic system. An optimization problem is carefully formulated to determine the optimal size of the battery while minimizing the total life cycle cost of the system. Hourly load data as well hourly solar output data for various ratings of the PV systems are used. The optimal size of battery is also determined for different retail prices of grid electricity. The results obtained are then carefully analyzed and discussed. It has been found that, with current retail price of electricity in South Australia, installation of battery storage is becoming more beneficial and crosses the economic breakeven point.
最近上网电价的降低使得没有合适的电池储能系统的住宅屋顶太阳能光伏系统的安装没有吸引力。本文描述了一种确定南澳大利亚典型住宅与并网屋顶太阳能光伏系统的最佳电池存储尺寸的技术。一个优化问题是精心制定的,以确定电池的最佳尺寸,同时最小化系统的总生命周期成本。每小时的负荷数据以及每小时的太阳能输出数据用于各种额定值的光伏系统。根据不同的电网电力零售价格,确定了电池的最佳尺寸。然后仔细分析和讨论得到的结果。研究发现,在南澳大利亚州目前的电力零售价格下,安装电池储能系统正变得越来越有利,并超过了经济盈亏平衡点。
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引用次数: 4
Optimal scheduling of electrical appliances and DER units for home energy management system 家庭能源管理系统中电器和DER单元的优化调度
Pub Date : 2017-11-01 DOI: 10.1109/AUPEC.2017.8282500
M. Nizami, Jahangir Hossain
This paper presents an optimal scheduling model for Demand Response (DR) based Home Energy Management System (HEMS) that schedules residential electrical appliances and Distributed Energy Resource (DER) units for active residential consumers. The scheduling problem is formulated using Mixed-Integer Linear Programing (MILP). The primary objective of the proposed model is to minimize the electricity expenditure of the consumer while maintaining an optimal comfort level. Grid reliability criteria have also been incorporated into the optimization constraints to address the issue of rebound peaks and voltage-level violation in distribution grids which may arise due to large-scale adoption of DR-based HEMS. The proposed HEMS model is simulated and verified with a case study for a typical house, and the simulation showed positive results with up to 18% energy expenditure savings for the consumer.
提出了基于需求响应(DR)的家庭能源管理系统(HEMS)的最优调度模型,该模型为活跃的住宅用户调度家用电器和分布式能源(DER)单元。利用混合整数线性规划(MILP)对调度问题进行了表述。所提出的模型的主要目标是在保持最佳舒适度的同时最大限度地减少消费者的电力支出。电网可靠性标准也被纳入优化约束,以解决由于大规模采用基于dr的HEMS而可能出现的配电网反弹峰值和电压水平违规问题。提出的HEMS模型通过一个典型房屋的案例研究进行了模拟和验证,模拟结果表明,为消费者节省了高达18%的能源支出。
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引用次数: 9
期刊
2017 Australasian Universities Power Engineering Conference (AUPEC)
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