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2021 25th Electrical Power Distribution Conference (EPDC)最新文献

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Fault Current Protection in distribution system connected EVCH: A Review 配电系统接EVCH故障电流保护综述
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610818
Morteza Hesami, K. Rouzbehi, M. Moradlou, Seyyed Majid Mousavi, Saeed Behzadpoor
This paper presents various solutions to reduce or prevent short circuit damages in distribution system connected Electric Vehicle Charging Stations (EVCS). In EVCSs, medium voltages with high-level currents are standardized. Hence, protection against short circuit faults is a serious concern. Intensification of short circuit levels may lead to the entire damage to the power electronic equipment. On the other hand, the battery can be damaged on the Electric Vehicles (EV) side as well. In this study, the structural details of EV systems and EVCSs are described, and the fault positions in different parts of these systems are described. Finally, a comprehensive comparison of the protection devices is given.
本文提出了减少或防止配电网中电动汽车充电站短路损坏的各种解决方案。在evcs中,具有高电平电流的中压是标准化的。因此,防止短路故障的保护是一个严重的问题。短路程度的加剧可能导致电力电子设备的整体损坏。另一方面,电动汽车(EV)方面的电池也可能损坏。本文描述了电动汽车系统和电动汽车系统的结构细节,并描述了这些系统不同部位的故障位置。最后,对各种保护装置进行了综合比较。
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引用次数: 2
A State Flow based-Power Management of Hybrid Photo Voltaic / Fuel Cell- Electrolyzer / Battery Power System Connected to Distribution Network 并网光伏/燃料电池-电解槽/蓄电池混合动力系统的状态流电源管理
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610792
Mohammadali Esmaeili, A. Hajizadeh, A. Fereidunian
This paper presents a state-flow based power management method in a hybrid power system including some Renewable Energy Sources (RESs) connected to the distribution network. Photo Voltaic (PV) is the main energy resource, battery, and Fuel Cell (FC)-Electrolyzer are the priory ad secondary energy storage respectively. In addition, Electrolyzer uses a Hydrogen Tank to store the produced Hydrogen (H2). This produced H2 used by FC. These RESs, work together and affect on each other, so different possible states to cover properly different loads in a 24 hours interval regarded. This hybrid system is first analyzed economically in Hybrid Optimization Model for Electric Renewable (HOMER), then modeled in Simulink/MATLAB.
提出了一种基于状态流的可再生能源并网混合电力系统的电力管理方法。光伏(PV)是主要的能源,电池和燃料电池(FC)-电解槽分别是一级和二级储能。此外,电解槽使用一个氢罐来储存产生的氢气(H2)。这产生了被FC利用的H2。这些RESs,一起工作,相互影响,所以不同的可能状态,以适当地覆盖不同的负载在24小时的间隔考虑。首先在可再生电力混合优化模型(HOMER)中对该混合动力系统进行了经济性分析,然后在Simulink/MATLAB中进行了建模。
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引用次数: 1
A New Strategy for Mitigating The Frequency Deviation in Distribution networks and Microgrids 配电网和微电网频率偏差控制的新策略
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610766
Mehrdad Bagheri Sanjareh, M. Nazari, S. Hosseinian, Seyyed Mohammad Sadegh Ghiasi
An islanded Microgrid (MG) might experience extreme frequency deviations which necessitates a reliable frequency control scheme to ensure its frequency stability. Various techniques have been proposed including PI control and more advanced techniques like fuzzy control. The PI controls cannot establish a fast frequency restoration due to their poor performance and slow response-time of DGs. Advanced methods have been able to slightly improve the DGs response-time and hence decrease the total frequency deviation. Here, a novel frequency control scheme is proposed that despite its simplicity than previous schemes is able to further decrease the total frequency deviation. The proposed is tested on the CIGRE low voltage MG. The simulation results show that using the proposed frequency control scheme, the value of the total absolute frequency deviation is decreased by 79% and 68 % than using the GA-optimized and fuzzy frequency schemes, respectively.
孤岛微电网可能出现极端的频率偏差,需要可靠的频率控制方案来保证其频率稳定性。各种各样的技术被提出,包括PI控制和更先进的技术,如模糊控制。由于PI控制的性能差和dg的响应时间慢,PI控制无法建立快速的频率恢复。先进的方法已经能够略微改善DGs的响应时间,从而减少总频率偏差。本文提出了一种新的频率控制方案,尽管它比以前的方案简单,但能够进一步降低总频率偏差。并在CIGRE低压MG上进行了试验。仿真结果表明,该频率控制方案比遗传算法优化方案和模糊频率控制方案的总绝对频率偏差值分别降低了79%和68%。
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引用次数: 2
DC Fault Analysis in MMC Based HVDC Systems along with Proposing a Modified MMC Protective Topology for Grid Stability 基于MMC的高压直流系统直流故障分析及改进的MMC保护拓扑
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610803
Araz Saleki, Bahram Jahanbakhshi Pordanjani, M. Bina
One of the most important issues in MMC based HVDC systems is lack of appropriate solution against DC fault. In this paper, firstly a summary of power transmission systems and their advantages and disadvantages are expressed. Then, types of HVDC system are investigated in detail. Structure types of HVDC is reviewed and its advantages over the conventional AC system are expressed. Then, the types of DC fault in the HVDC grid are examined. In section III, Modular Multilevel Converter (MMC) are expressed. Due to unique features of MMC, these converters have a higher acceptability than other topologies for use in a HVDC system. Since it is necessary to limit the fault currents to protect MMCs from serious short circuit faults against DC fault, several protection schemes have been introduced to deal with the DC short circuit faults. section V, analyzes such a new protective topology and operation principles to protect the MMC converter against DC short circuit fault. Finally, by simulating the HVDC grid short circuit fault, the protective performance of the proposed topology is investigated.
基于MMC的直流输电系统存在的一个重要问题是缺乏合适的直流故障解决方案。本文首先对动力传动系统进行了概述,并对其优缺点进行了阐述。然后对高压直流系统的类型进行了详细的研究。综述了高压直流系统的结构类型,并阐述了其相对于传统交流系统的优点。然后,对高压直流电网中直流故障的类型进行了分析。第三节介绍了模块化多电平转换器(MMC)。由于MMC的独特功能,这些转换器在高压直流系统中使用比其他拓扑具有更高的可接受性。由于需要限制故障电流以保护mmc免受直流故障的严重短路故障,因此引入了几种处理直流短路故障的保护方案。第五节,分析了这种新的保护拓扑和工作原理,以保护MMC变换器不发生直流短路故障。最后,通过对高压直流电网短路故障的仿真,研究了该拓扑的保护性能。
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引用次数: 4
CHPs and EHPs Effectiveness Evaluation in a Residential Multi-Carrier Energy Hub 住宅多载波能源枢纽中热电联产和EHPs的有效性评估
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610816
Atefeh-sadat Mirhedayati, Hossein Shahinzadeh, H. Nafisi, G. Gharehpetian, M. Benbouzid, M. Shaneh
Energy hub paradigms are experiencing rapid pervasiveness during the last decade. Even though many studies have delved into the structure of hub systems, ongoing research projects are developing hub models to improve reliability and efficiency by adding new components to the scheme. Combined heat and power (CHP) units and boilers have been pivotal elements in hub models. However, in recent years the idea of integration of electrical heat pumps (EHPs) into the model is evaluated. This study aims to conduct a comparison between the effectiveness of CHP and EHP for the satisfaction of thermal demand in a residential energy hub with regard to economic objectives. In addition, in order to have a more practical appraisal, real-time pricing (RTP) demand response program is modeled in the simulation.
在过去十年中,能源中心模式正在迅速普及。尽管许多研究已经深入研究了轮毂系统的结构,但正在进行的研究项目是开发轮毂模型,通过向方案中添加新组件来提高可靠性和效率。热电联产(CHP)机组和锅炉是轮毂模型的关键部件。然而,近年来,将电热泵(EHPs)集成到模型中的想法得到了评估。本研究旨在比较热电联产和EHP在满足住宅能源中心的热需求方面的经济目标的有效性。此外,为了有一个更实际的评估,在仿真中建立了实时定价(RTP)需求响应方案的模型。
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引用次数: 4
Surge Arrester Placement in Wind Turbine System by Evaluation Overvoltages of Direct Lightning Strike to the Wind Turbine Blades and Overhead Distribution Lines 通过评估风力发电机叶片和架空配电线路的直接雷击过电压,在风力发电机系统中放置避雷器
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610790
Mahmoud Eshaghahmadi, M. Hoorzad
With the increasing use of renewable energy, the design of lightning protection system in generating electricity from wind energy is an important issue. Most wind turbines are installed in areas with high lightning density, high altitudes and rocky areas. Therefore, wind turbines are strongly affected by the direct impact of lightning on the wind turbine blades and even on the adjacent ground. On the other hand, the ground system is one of the most important components required in a lightning protection system suitable for wind turbines that proper design with an effective surge arrester is essential for the safety of people and equipment and the reduction of transient overvoltages on wind turbine electronic equipment. In this paper, using the real parameters of a 100 kW wind turbine, transient overvoltages against direct lightning strike to WT blades and overhead distribution line simulated. wind turbine equipment, grounding system, and a selected arrester are modelled in EMTP-RV environment for analyzing overvoltages in differenct scenarios.
随着可再生能源的日益普及,风电防雷系统的设计是一个重要的问题。大多数风力涡轮机都安装在闪电密度高、海拔高和多岩石的地区。因此,雷电对风力涡轮机叶片甚至相邻地面的直接冲击对风力涡轮机的影响很大。另一方面,接地系统是风力发电机组防雷系统中最重要的组成部分之一,合理设计有效的避雷器对人员和设备的安全以及减少风力发电机组电子设备的瞬态过电压至关重要。本文利用100kw风力机的实际参数,模拟了WT叶片和架空配电线路受直击时的瞬态过电压。在EMTP-RV环境中对风力发电机设备、接地系统和选定的避雷器进行了建模,以分析不同场景下的过电压。
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引用次数: 2
Analysis and comparison of actual behavior of oil-type and dry-type transformers during lightning 油式和干式变压器在雷击中的实际性能分析与比较
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610800
H. Amiri
This study aims at analyzing behavior and state of oil-type and dry-type transformers during lightning strikes. Since lightning is an inevitable phenomenon in electricity grids, this issue should be considered in design stage of grid and transformer and also implementation of transformer in the electricity grid. As different protectors exist in generation and transmission transformers, distribution transformers have been taken into account in this study. The impact of lightning strike on the distribution transformers is usually diminished with the help of earth system or protectors. However, the effect of lightning on transformer insulation is not negligible. Thus, it should be investigated. Behavior results have been given in a comparative manner in order to present a better understanding of transformers' insulation behavior.
本研究的目的是分析油式和干式变压器在雷击时的行为和状态。雷电是电网中不可避免的现象,在电网和变压器的设计阶段,以及在电网中实施变压器时,都要考虑到这个问题。由于发电变压器和输电变压器中存在不同的保护器,因此本研究考虑了配电变压器。雷击对配电变压器的影响通常通过接地系统或保护装置来减小。然而,雷电对变压器绝缘的影响是不可忽视的。因此,应该对此进行调查。为了更好地理解变压器的绝缘性能,以比较的方式给出了性能结果。
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引用次数: 3
Pre-Flooding Island Formation in Distribution Systems Resolving Local Critical Infrastructures Interdependency 配电系统洪水前岛屿形成解决局部关键基础设施相互依赖问题
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610817
M. Bahrami, M. Vakilian, H. Farzin, M. Lehtonen
Floodwater can severely damage electricity distribution system (DS) components and interrupt the service to all the customers, even the critical ones. Thus, it is necessary to evaluate the possible impacts of a flooding event on DS operation. This paper proposes a new framework that constructs islands prior to flood occurrence, for continuation of electricity supply to the critical loads realizing different important infrastructures interdependency. The interdependencies between different local critical infrastructures are modeled in this framework. In addition, distributed generators (DGs) as well as the underground cables are considered as vulnerable components to flooding. The proposed framework divides a DS into several islands before flood formation. It is implemented on the 33-bus distribution test system, and its effectiveness in improvement of electricity supply continuation to the critical loads is verified through some case studies.
洪水会严重损坏配电系统的部件,中断所有用户的服务,甚至是关键用户。因此,有必要评估洪水事件对DS作业可能产生的影响。本文提出了一种新的框架,即在洪水发生之前建造岛屿,以实现对关键负荷的持续供电,实现不同重要基础设施的相互依赖。不同本地关键基础设施之间的相互依赖关系在此框架中建模。此外,分布式发电机(dg)和地下电缆被认为是易受洪水影响的部件。建议的框架在洪水形成之前将DS划分为几个岛屿。在33母线配电试验系统上进行了实施,并通过实例验证了该方法在改善关键负荷供电连续性方面的有效性。
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引用次数: 2
Investigating the growth and development of distribution sector assets and the impact of inflation 调查分销部门资产的增长和发展以及通货膨胀的影响
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610788
Leila Fayazi Rad, R. Dashti, Habib Allah Ravaghi Ardabili
Due to the special importance of asset management and the effects of inflation in increasing the costs of electricity distribution companies, asset growth is proportional to the growth of peak load and the number of subscribers, and also asset development costs should increase with inflation, but this increase It is not equivalent to rising inflation. In this paper, we propose a model for calculating how inflation affects the rate of increase in asset development costs. Then, by numerical comparison in recent years, we prove that in exchange for increasing a certain amount of inflation, asset development costs increase 2 to 3 times.
由于资产管理的特殊重要性和通货膨胀对配电公司成本增加的影响,资产增长与高峰负荷和用户数量的增长成正比,资产开发成本也应随着通货膨胀而增加,但这种增加并不等同于通货膨胀的上升。在本文中,我们提出了一个模型来计算通货膨胀如何影响资产开发成本的增长率。然后,通过近几年的数值比较,我们证明了在增加一定的通货膨胀的同时,资产开发成本增加了2 ~ 3倍。
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引用次数: 0
Optimal Operation of Microgrid with freshwater, thermal and electric demand 淡水、热能和电力需求下微电网的优化运行
Pub Date : 2021-08-18 DOI: 10.1109/EPDC53015.2021.9610748
M. Mohammadian, Omidreza Mashhadi, P. Ahmadi, S. Hosseinian
Considering ever-increasing utilization of renewable resources for generating energy, combined heat, and electricity generation in modern distribution networks and microgrids (MG) has attracted attention significantly. In this paper, a new approach is proposed for optimal energy management in MG. In fact, the literature of this context lacks a practical analysis for energy management in MGs such that network structure, power flow equations, the voltage of buses, and other practical constraints are considered. Thus, this paper presents a practical approach based on Optimal Power Flow (OPF) using ICA for optimal energy management in MG to minimize exploitation cost. It should be mentioned that the configuration of the standard IEEE-33 bus test network along with different energy tariffs and the possibility of energy exchange with the upstream network is considered in this study. In addition to thermal and electric demand, freshwater demand is also considered in this study, which should be provided by desalination of the MG. Simulation results demonstrate the efficiency and accuracy of the proposed method under different conditions.
随着可再生能源发电利用率的不断提高,现代配电网和微电网的热电联产受到了广泛关注。本文提出了一种新的能量优化管理方法。事实上,这方面的文献缺乏对mg中能量管理的实际分析,例如考虑网络结构,潮流方程,母线电压和其他实际约束。因此,本文提出了一种基于最优潮流的实用方法,利用ICA进行MG的最优能量管理,以使开发成本最小化。需要说明的是,本研究考虑了标准IEEE-33总线测试网络的配置以及不同能源资费,以及与上游网络进行能源交换的可能性。除了热能和电力需求外,本研究还考虑了淡水需求,淡水需求应由MG的海水淡化提供。仿真结果验证了该方法在不同条件下的有效性和准确性。
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引用次数: 0
期刊
2021 25th Electrical Power Distribution Conference (EPDC)
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