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2022 57th International Universities Power Engineering Conference (UPEC)最新文献

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A Basic Phase Shift Full Bridge DC-DC Converter Design And Simulation 基本移相全桥DC-DC变换器的设计与仿真
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917909
Ş. Küçük, Erdem Akboy
Full Bridge (FB) converters are used in the industrial applications such as switch mode power supplies, high voltage power supplies, battery chargers and welding machines etc. FB isolated DC-DC converters provide a safe charging process by providing galvanic isolation between the battery and the mains. Since the efficiency of the battery charger largely depends on the efficiency of the DC-DC converters, DC-DC converters are very important for battery chargers. However, at FB converters, the parasitic oscillations between the parasitic capacitors of the switches and the leakage inductance of the transformer can reach unacceptable levels for switching losses. Therefore, phase-shift method can be used to provide Soft Switching (SS). At this method, the overlapping of the current and voltages of the switches are reduced and so switching losses are decreased. Moreover current and voltage stresses of power components and Electro Magnetic Interference (EMI) are decreased. It is suitable and preferred for battery chargers in EV technology. In this study, a phase shift FB converter is presented. The design parameters and simulation results are given for input voltage of 385V DC, switching frequency of 50 kHz, and output of 250 W / 48 V.
全桥(FB)转换器用于工业应用,如开关电源,高压电源,电池充电器和焊机等。FB隔离DC-DC转换器通过在电池和电源之间提供电流隔离来提供安全的充电过程。由于电池充电器的效率很大程度上取决于DC-DC转换器的效率,因此DC-DC转换器对于电池充电器来说非常重要。然而,在FB变换器中,开关的寄生电容和变压器的漏电感之间的寄生振荡可以达到不可接受的开关损耗水平。因此,相移法可以提供软开关(SS)。这种方法减少了开关电流和电压的重叠,从而降低了开关损耗。减小了电源元件的电流和电压应力,降低了电磁干扰。它是电动汽车技术中电池充电器的首选。本研究提出了一种相移FB变换器。给出了输入电压为385V DC,开关频率为50khz,输出功率为250w / 48v时的设计参数和仿真结果。
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引用次数: 2
An Analysis Of Power Quality Improvement By Reactive Power Compensation Devices 无功补偿装置改善电能质量的分析
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917907
Farzana Hossin, G. Lacey, Rafiqul Chowdhury
Providing continuous high-quality power is an important aspect of a power system. This, however, requires the use of compensation devices due to the nonlinear load condition and dynamic nature of the power system to avoid invalidating the legal limit standard set by a country’s supply regulation. Keeping the power and voltage level within the given statutory limit can be achieved by injecting or absorbing reactive power by using reactive power compensation (RPC) devices. Flexible AC Transmission Systems (FACTS) also play a key role in enhancing power quality. This paper discusses simulation models developed in IPSA and ETAP software to simulate the power quality improvement of a selection of devices and conducts a performance analysis.
提供持续高质量的电力是电力系统的一个重要方面。然而,由于电力系统的非线性负载状态和动态性,这就需要使用补偿装置,以避免一国供电监管规定的法定限值标准失效。通过使用无功补偿(RPC)装置注入或吸收无功功率,可以将功率和电压水平保持在给定的法定限制范围内。柔性交流输电系统(FACTS)在提高电能质量方面也起着关键作用。本文讨论了在IPSA和ETAP软件中开发的仿真模型,以模拟选定器件的电能质量改进并进行性能分析。
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引用次数: 1
Whale Optimization Algorithm Based Optimal Operation of Power Distribution Systems 基于鲸鱼优化算法的配电系统优化运行
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917748
O. Baimakhanov, A. Saukhimov, O. Ceylan
This paper solves the optimal operation problem of distribution systems using renewable energy sources and voltage regulators. The developed model makes use of Whale Optimization Algorithm based optimization. We apply the proposed optimization model to a modified low voltage distribution system of Almaty, Kazakhstan. Three different cases were simulated. The cases considered are medium load level with medium PV power output, high load level with medium PV output, and high load level and low PV power outputs. The simulation results show that the proposed algorithm is able lower the active power losses.
本文解决了采用可再生能源和调压器的配电系统的最优运行问题。该模型采用了基于鲸鱼优化算法的优化方法。我们将提出的优化模型应用于哈萨克斯坦阿拉木图的一个改进的低压配电系统。模拟了三种不同的情况。考虑的情况包括中等负载水平和中等光伏输出、高负载水平和中等光伏输出、高负载水平和低光伏输出。仿真结果表明,该算法能够降低有功功率损耗。
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引用次数: 1
Stochastic Model Predictive Control for Microgrids Based on Monte Carlo Simulations 基于蒙特卡罗仿真的微电网随机模型预测控制
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917666
Mustafa Sezgin, Soheil Pouraltafi-kheljan, Mehmet Beyarslan, M. Göl
Distributed renewable generation can be harmonized with the utility grid in flexible structures called microgrids. However, the use of renewables has its drawbacks, such as intermittency and generation uncertainty. Smart controllers can be used to solve such problems and operate the microgrids seamlessly. Accurate forecasts of the generation and demand can be beneficial for optimum operation. Unfortunately, such accurate forecasts may not be available in many cases due to the lack of measurements, the uncertainty of weather conditions, and the human factor. Although renewable sources can be predicted with the state of the art weather forecast methods, there is still uncertainty in their forecasts. Moreover, electric vehicles’ charging time and duration has a probabilistic nature. A stochastic model predictive control methodology is proposed in this work to cope with such scenarios. Throughout the manuscript, the methodology and the corresponding simulation results are presented.
分布式可再生能源发电可以在称为微电网的灵活结构中与公用电网协调。然而,可再生能源的使用也有其缺点,比如间歇性和发电的不确定性。智能控制器可以用来解决这些问题,并无缝地运行微电网。准确预测发电量和需求有利于优化运行。不幸的是,由于缺乏测量、天气条件的不确定性和人为因素,在许多情况下可能无法获得如此准确的预报。虽然可再生能源可以用最先进的天气预报方法进行预测,但其预测仍然存在不确定性。此外,电动汽车的充电时间和持续时间具有概率性。本文提出了一种随机模型预测控制方法来应对这种情况。在整个手稿中,给出了方法和相应的仿真结果。
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引用次数: 0
A Smart Energy Management System for Elderly Households 高龄家庭智能能源管理系统
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917856
Christos L. Athanasiadis, K. Pippi, T. Papadopoulos, C. Korkas, Christos Tsaknakis, V. Alexopoulou, Vasileios Nikolaidis, Elias B. Kosmatopoulos
The rapid growth of aging population dictates the necessity of sophisticated monitoring and actuation systems for the smart control and management of elderly households. This paper proposes a state-of-the-art energy management system aiming at increased energy efficiency, lower electricity cost and improved user comfort. The study focuses on a Greek residency with elderly people incorporating controllable and uncontrollable loads, an energy storage system, and photovoltaic generation. A smart home energy management system under the net-metering policy is proposed consisting of three control mechanisms. The reported results offer insights into the optimal residential management practices and evaluate the performance of the proposed control strategy in comparison to other alternative demand response solutions.
人口老龄化的快速增长,要求对老年家庭进行智能控制和管理的精密监控和驱动系统的必要性。本文提出了一种先进的能源管理系统,旨在提高能源效率,降低电力成本和改善用户舒适度。该研究的重点是希腊老年人的住宅,包括可控和不可控负荷,储能系统和光伏发电。提出了一种基于净计量政策的智能家居能源管理系统,该系统由三种控制机制组成。报告的结果提供了对最佳住宅管理实践的见解,并与其他替代需求响应解决方案相比,评估了拟议控制策略的性能。
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引用次数: 4
Zero-Sequence Based Fault Location in Non-Effectively Earthed Distribution Systems 基于零序的非有效接地配电系统故障定位
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917743
M. Atsever, Umur Deveci, Seyit Cem Yılmaz, M. H. Hocaoğlu
Earth faults are detected and located by using zero sequence current magnitude in the field. However, distribution networks may have different neutral earthing strategies, generally, preferred by distribution system operators or enforced by regulatory bodies. Different earthing practices create difficulties for earth fault location problems. In addition to this difficulty, heavy underground cable usage increases the capacitive current levels of the system. Circulating capacitive currents during the single line to ground faults may further hinder the effectiveness of earth fault location algorithms. This work presents zero sequence magnitude-based fault location performance on 151-node distribution network considering different earthing methodologies and line types.
利用现场零序电流大小检测和定位接地故障。然而,配电网可能有不同的中性点接地策略,通常由配电网运营商优选或由监管机构强制执行。不同的接地方式给接地故障定位问题带来了困难。除了这个困难之外,大量地下电缆的使用增加了系统的容性电流水平。单线接地故障时的循环电容电流可能进一步影响接地故障定位算法的有效性。本文研究了在考虑不同接地方式和线路类型的情况下,基于零序震级的151节点配电网故障定位性能。
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引用次数: 2
Establishing a Power Hardware-in-the-Loop Environment with a Smart Energy Complex 以智慧能源综合体构建电力硬件在环环境
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9918012
F. Gielnik, J. Geis-Schroer, Daniela Eser, Samuel Eichhorn, Sina Steinle, C. Hirsching, F. Mueller, M. Suriyah, T. Leibfried
Improving energy efficiency within existing buildings plays a crucial role in achieving the ambitious goal of future CO2 neutrality. For this reason, this contribution outlines the conversion of an existing, decades-old building into a smart office building. Combining this idea with the integration of future technologies – power-to-hydrogen and DC microgrids as well as the integration of existing approved facilities such as a switching matrix system – establishes the concept of a Smart Energy Complex. The setup presented in this contribution allows for both normal operation of the building and power hardware-in-the-loop testing at the same time.
提高现有建筑的能源效率对于实现未来二氧化碳中和的宏伟目标至关重要。出于这个原因,这个贡献概述了将现有的数十年历史的建筑转换为智能办公大楼。将这一想法与未来技术的整合相结合——电力到氢和直流微电网,以及现有批准设施(如开关矩阵系统)的整合——建立了智能能源综合体的概念。本文中提供的设置允许同时进行建筑物的正常操作和电源硬件在环测试。
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引用次数: 1
Torque-Speed Characteristics for Electrically Powered Rim Driven Fans and Thrust Comparison with a Small Conventional Fan Jet Engine 电动轮辋驱动风扇的转矩-转速特性及其与小型传统风扇喷气发动机的推力比较
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917918
R. Bolam, Jhon Paul C. Roque, Y. Vagapov, Richard J. Day
The aim of this paper is to provide a method of estimating torque versus speed characteristics of single and dual-stage electrically powered Rim Driven Fans which are intended for aircraft propulsion. The methodology is based on the well-known Euler equation which considers the change in angular momentum of the air as it passes through the fan rotors. A derivation of the useful and versatile Specific Work parameter (Y) is provided along with its important relationship with the fan Work Co-efficient ($psi$) and an explanation of the relevance of the Fan Flow Co-efficient ($emptyset$) in determining the flow of air through the RDF device. An equation is derived which relates the fan torque to its rotational speed and a specimen calculation of a 200 mm inlet diameter RDF has been provided. Electrical performance graphs, generated with Motor-CAD LAB software, are included to illustrate an example of a suitably optimised RDF motor circuit. Finally, a thrust performance comparison is made between a theoretical dual-stage RDF and a commercially available fan-jet engine. It is demonstrated that the dual-stage RDF technology could offer a viable solution to power high-speed medium and large commercial transport aircraft, making them particularly suited to distributed thrust system architectures and blended-wing-body aircraft designs.
本文的目的是提供一种估计用于飞机推进的单级和双级电动轮辋驱动风扇的扭矩与速度特性的方法。该方法基于著名的欧拉方程,该方程考虑了空气通过风扇转子时角动量的变化。提供了有用和通用的比功参数(Y)的推导,以及它与风扇功系数($psi$)的重要关系,并解释了风扇流量系数($emptyset$)在确定通过RDF设备的空气流量方面的相关性。推导了风机转矩与转速的关系式,并给出了进气直径为200mm的风机转矩的试样计算。电气性能图,由电机cad LAB软件生成,包括说明一个适当优化RDF电机电路的例子。最后,对理论双级RDF发动机与市售风扇喷气发动机的推力性能进行了比较。结果表明,双级RDF技术可以为高速中大型商用运输机提供可行的动力解决方案,使其特别适合分布式推力系统架构和混合翼身飞机设计。
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引用次数: 0
A Survey of VPP Influence on Power Quality VPP对电能质量影响的研究
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917850
Eda-Elif Gemil, Vlăduț-Andrei Ion, R. Porumb, Mădălina Arhip-Călin, Cristian Gorea, N. Anton
This article is a survey of the power quality problems that can occur in power systems, in the context of rising integration of the renewable energy systems, as well as the energy storage systems. By aggregating the production, consume and storage process into a Virtual Power Plant (VPP), some of the many effects of the problems of power quality could be minimized, with the appropriate management plan.
本文概述了在可再生能源系统和储能系统日益一体化的背景下,电力系统可能出现的电能质量问题。通过将生产、消费和储存过程聚合到一个虚拟电厂(VPP)中,通过适当的管理计划,可以将电能质量问题的一些影响降到最低。
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引用次数: 0
The SMEmPower Monitoring, Targeting and Verification Tool SMEmPower监控、定位和验证工具
Pub Date : 2022-08-30 DOI: 10.1109/UPEC55022.2022.9917591
Stavros K. Filippidis, N. Kelepouris, A. Bouhouras, Georgios C. Christoforidis, S. A. Vomva, I. D. Pasiopoulou, G. Papagiannis
This paper presents the methodology and the implementation of the monitoring and targeting (M&T) and monitoring and verification (M&V) tools that were developed in the context of the SMEmPower Efficiency Horizon 2020 project. The tools were built to allow energy managers and energy experts of Small and Medium Enterprises (SMEs) to store and organize energy consumption and production measurements, identify increased energy readings, create scenarios of reduced energy consumption, and finally verify the efficiency of energy conservation measures. The tools were used during the three training rounds that were organized in eight countries by the SMEmPower Efficiency project partners. More specifically, they have been applied for the practical action of the trainees in order to perform energy evaluations or actualization of energy audits in pilot sites under real consumption and production data.
本文介绍了监测和目标(M&T)以及监测和验证(M&V)工具的方法和实施,这些工具是在SMEmPower效率地平线2020项目的背景下开发的。建立这些工具是为了让中小企业的能源管理人员和能源专家储存和组织能源消耗和生产测量,识别增加的能源读数,创建减少能源消耗的情景,并最终验证节能措施的效率。SMEmPower效率项目合作伙伴在八个国家组织的三轮培训中使用了这些工具。更具体地说,它们已被应用于受训人员的实际行动,以便根据实际消费和生产数据在试验点进行能源评价或实施能源审计。
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引用次数: 0
期刊
2022 57th International Universities Power Engineering Conference (UPEC)
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