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2019 54th International Universities Power Engineering Conference (UPEC)最新文献

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Universities as a source of grid flexibility: A case study 大学作为网格灵活性的来源:一个案例研究
Pub Date : 2019-11-08 DOI: 10.1109/UPEC.2019.8893557
Motasem Bani Mustafa, P. Keatley, Ye Huang, O. Agbonaye, N. Hewitt, I. Vorushylo
This paper presents a case study for Ulster University (UU) campus using NEPLAN Electricity simulation software to study the potential of providing flexibility to the distribution network. Three simulation scenarios were done by adding battery energy storage (BES) to the campus, adding a third wind turbine, and finally adding storage with a third wind turbine. The simulation results show that adding a third turbine without BES will not have that extra benefit to the UU, and a BES should be considered to get the benefit from excess generation from the wind turbine. UU campus ability to manage to cover its load from renewables and BES will allow to reduce the total network demand and solve congestions that may happen from load increasing in the network.
本文介绍了阿尔斯特大学(UU)校园的一个案例研究,使用NEPLAN电力仿真软件来研究为配电网络提供灵活性的潜力。通过在园区内增加电池储能系统(BES),增加第三台风力涡轮机,最后使用第三台风力涡轮机增加存储,完成了三种模拟场景。仿真结果表明,在无BES的情况下增加第三台机组不会对UU产生额外的效益,应考虑增加BES以获得风电机组多余发电量的效益。UU校园管理可再生能源和BES负荷的能力将允许减少总网络需求,并解决网络负荷增加可能发生的拥堵。
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引用次数: 1
Feasibility Study of Small Scale Battery Storage Systems Integrated with Renewable Generation Technologies for Sri Lankan Domestic Applications 小型电池储能系统与可再生能源发电技术在斯里兰卡国内应用的可行性研究
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893549
Wattala Fernando, N. Gupta, G. Kamyab, C Ozveren Suheyl
The purpose of energy storage technologies is to ultimately increase the efficiency of renewable energy generation methods and systems and decrease the global CO₂ emissions to tackle the Sri Lanka government’s sustainability targets. This research aims to provide a summary of energy storage and to determine the feasibility and optimal battery storage technology for a 3-bedroom house when integrated with renewable generation source such as solar PV. This research was carried out by using a renewable energy system analysis tool called HOMER pro, solar PV were modelled and simulated with each type of battery, lithium ion and lead-acid batteries, in grid-connected mode. To get a better understanding of how battery storage could be utilized, system was simulated in Matara, located at the south coast of Sri Lanka.
储能技术的目的是最终提高可再生能源发电方法和系统的效率,减少全球二氧化碳排放,以解决斯里兰卡政府的可持续发展目标。本研究旨在总结能源存储,并确定与太阳能光伏等可再生能源相结合的三居室住宅的可行性和最佳电池存储技术。本研究采用可再生能源系统分析工具HOMER pro,对并网模式下的锂离子电池和铅酸电池两种类型的太阳能光伏进行了建模和仿真。为了更好地了解如何利用电池存储,系统在位于斯里兰卡南海岸的Matara进行了模拟。
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引用次数: 0
Tank Circuiting of 3-Pole PV Based DC Microgrid for Pole-to-Pole Voltage Balancing 基于三极光伏的直流微电网的槽路极对极电压平衡
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893547
Babatunde A. Giwa, Habtay Yehdego
This paper focuses on the regulation of pole-to-pole voltage in 3-Pole PV Based DC Microgrid (3-PPDM). This type of microgrid is conceived to mimic in dc microgrid, the operational feature of grid-connected three-phase ac microgrid where no transformer is required at distribution level for the provision of different voltage levels (phase and line) operation within the ac microgrid. 3-PPDM is developed with PV Based DC Microgrid connected to ac grid via single stage dc link and 3-Level Voltage Source Converter (3L-VSC). Operation of distributed flexible dc loads at lower voltage level on the dc link without dc-dc converters cause voltage imbalance among poles. This imbalance violates the technical constraints for desirable operation of both the 3L-VSC and distributed dc loads. Distributional effects of this violation are reduction in dc link voltage and grid parameters (voltage and current) qualities. Consequently, distributed Pulse Width Modulation (d-PWM) based algorithm was developed together with a 2-in-1 Tank Circuit (TC) to regulate this imbalance under slowly/rapidly varying irradiance by bringing the voltage differential among poles nearly to zero. The simulation results obtained under rectification and inversion operational mode of 3L-VSC show marginal improvement in dc link voltage and grid current qualities at reduced operational cost.
本文主要研究了基于3极光伏的直流微电网(3-PPDM)中极对极电压的调节。这种类型的微电网被认为是在直流微电网中模拟并网三相交流微电网的运行特征,其中在交流微电网中不需要配电级变压器来提供不同的电压水平(相位和线路)运行。3-PPDM是基于光伏的直流微电网通过单级直流链路和3级电压源变换器(3L-VSC)与交流电网连接而开发的。无dc-dc变换器的分布式柔性直流负载在直流链路上以较低电压水平运行,造成极间电压不平衡。这种不平衡违反了3L-VSC和分布式直流负载理想运行的技术约束。这种冲突的分布效应是直流链路电压和电网参数(电压和电流)质量的降低。因此,基于分布式脉宽调制(d-PWM)的算法与2合1槽电路(TC)一起开发,通过使两极之间的电压差接近于零来调节慢/快速变化辐照度下的这种不平衡。在3L-VSC整流和逆变运行模式下的仿真结果表明,在降低运行成本的情况下,直流链路电压和电网电流质量得到了边际改善。
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引用次数: 1
Evaluation of Precipitation Rate Impacts on Overhead Transmission Line Ampacity 降水率对架空输电线路容量影响的评价
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893644
Abdallah Abdaelbaset, M. Farrag, S. Farokhi
The worldwide fast pace at which wind power generation technology and its drive train is growing has increased the demand for wind farm connection into the power grid. The UK target of increasing wind energy contribution coupled with the excellent wind profile has led to growing demand for distribution and transmission connection points. The main obstacle hindering large scale of integration of the wind energy is the thermal capacity limits of the existing transmission lines infra structure. Thermal capacity computation techniques are based on heat balance equation stipulated in IEEE 738. This paper analyses the heat balance equation and proposes the addition of new variable to the set of heat balance equations, discusses the economic aspects of dynamic line ratings. The main objective of this paper is to mathematically integrate the effect of precipitation rate into the heat balance equation, based on empirical study conducted.
风力发电技术及其传动系统在世界范围内的快速发展,增加了对风电场接入电网的需求。英国的目标是增加风能的贡献,加上良好的风力剖面,导致对配电和输电连接点的需求不断增长。阻碍风能大规模并网的主要障碍是现有输电线路基础设施的热容量限制。热容量计算技术基于IEEE 738中规定的热平衡方程。本文对热平衡方程进行了分析,提出了在热平衡方程组中增加新的变量,并从经济方面讨论了动态线路额定值。本文的主要目的是在实证研究的基础上,将降水率的影响在数学上整合到热平衡方程中。
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引用次数: 0
Promoting The ‘E’ In Stem 推广Stem中的“E”
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893594
Sara Darwish, Mohamed Darwish
Science, Technology, Engineering, and Mathematics (STEM) has been growing initiative for the past twenty years, and many countries are attempting to make significant steps in its implementation. In this paper the link between STEM Education and STEM Occupation is highlighted. This link is very important when it comes to engineering discipline in general and power engineering in particular.
在过去的二十年里,科学、技术、工程和数学(STEM)越来越受到重视,许多国家都试图在实施STEM方面迈出重大步伐。本文强调了STEM教育与STEM职业之间的联系。当涉及到一般的工程学科,特别是动力工程时,这种联系是非常重要的。
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引用次数: 0
Power Hardware In the Loop and Ancillary Service for Voltage Regulation in Low Voltage Grid 低压电网电压调节的电力硬件在环及辅助服务
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893578
S. Oyegoke, Y. Habtay, Marios Maniatopoulos, P. Kotsampopoulos, Simeon Keates
Power production via traditional generators play a major role to meet demand, however, the trend is shifting towards utilization of distributed renewable sources. Distributed Energy Resources (DER) becomes a means to support loads locally. As DERs are typically intermittent sources, there are challenges associated with the high level of penetration of these resources that are of concern to grid operators. There are also opportunities associated with this technology as the inverters connecting the DERs could support voltage regulation by performing reactive power compensation in the grid.The concept of utilizing droop controlled DERs as reactive power resources is explored in this paper. As the active power production fluctuates with solar insolation, the spare capacity of the inverters could be employed to provide effective reactive power compensation to support the grid.In this paper, Power Hardware in the Loop (PHIL) simulation was employed where a single-phase PV inverter hardware is operated in parallel with three other real-time simulated inverters to deliver ancillary services. The results have shown that the switching steps of the On-Load Tap changer transformer (OLTC) were reduced, thus improving overall system performance.
通过传统发电机发电在满足需求方面发挥着主要作用,然而,趋势正在转向利用分布式可再生能源。分布式能源(DER)成为局部支持负荷的一种手段。由于DERs通常是间歇性的,因此存在与这些资源的高度渗透相关的挑战,这是电网运营商所关注的。与此技术相关的还有机会,因为连接der的逆变器可以通过在电网中执行无功补偿来支持电压调节。本文探讨了利用下垂控制的DERs作为无功资源的概念。由于有功发电量随日照量的变化而波动,可以利用逆变器的备用容量提供有效的无功补偿,支持电网运行。本文采用电源硬件在环(PHIL)仿真,其中单相光伏逆变器硬件与其他三个实时仿真逆变器并联运行,以提供辅助服务。结果表明,有载分接变压器(OLTC)的开关步骤减少,从而提高了系统的整体性能。
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引用次数: 3
Supporting LV Distribution Network Voltage Using PV Inverters Under High EV Penetration 利用光伏逆变器在高EV渗透下支持低压配电网电压
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893498
E. Akakabota, G. Pillai, M. Allison
The growing popularity of Electric Vehicles (EV) as an alternative to fossil-fuel-driven vehicles has immense environmental appeal. Considering the effects on distribution networks, which were not designed to support such loads, several challenges are bound to be encountered in a future with purely EVs. One of such technical challenges is the effect of charging several EVs at the same time on distribution network voltage. While coordinated charging is one solution, reactive power compensation can be used to support voltage at the point of connection without the need for a centralised control. This paper explores the feasibility of using installed photovoltaic (PV) inverters as voltage compensation devices in Low Voltage (LV) distribution networks. A reactive power controller was developed in Simulink for PV inverters. The case study of a UK LV network for the winter season was used to investigate the feasibility. Results using a cumulative under-voltage index (CUVi) developed to quantify the contributions of the PV inverter reactive power compensation to network voltage support shows that for up to 30% EV penetration, the available PV capacity alone can completely eliminate under-voltage incidents.
日益普及的电动汽车(EV)作为化石燃料驱动的汽车的替代品具有巨大的环境吸引力。考虑到对配电网络的影响,这些网络并不是为支持这样的负荷而设计的,未来纯电动汽车必然会遇到一些挑战。其中一个技术挑战是同时给几辆电动汽车充电对配电网电压的影响。虽然协调充电是一种解决方案,但无功补偿可用于支持连接点的电压,而无需集中控制。本文探讨了安装式光伏逆变器作为低压配电网电压补偿装置的可行性。在Simulink中开发了光伏逆变器无功功率控制器。以英国冬季LV网络为例,探讨了该系统的可行性。使用累积欠压指数(CUVi)来量化光伏逆变器无功补偿对电网电压支持的贡献,结果表明,在EV渗透率高达30%的情况下,仅可用光伏容量就可以完全消除欠压事件。
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引用次数: 1
Bidirectional Power and Data Flow via Enhanced Portal Based TSO-DSO Coordination 基于增强门户的TSO-DSO协调的双向功率和数据流
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893602
M. Radi, G. Taylor, M. Uslar, J. Köhlke, N. Suljanovic
This paper presents enhanced coordination between TSOs and DSOs with regard to market related information and data infrastructures that can be developed using a cloud-based approach. The definition of use cases with regard to the levels of portal access is proposed and particular attention is given to the different time and space scales of data that is needed to provide harmonised access. The attributes of the information layer as defined in the Smart Grid Architecture Model (SGAM) are reflected in the formally defined use cases. Different access levels are demonstrated via the definition of use cases for a trusted cloud platform by considering harmonised access processes and role-based access control for security.
本文介绍了tso和dso之间在市场相关信息和数据基础设施方面的加强协调,这些信息和数据基础设施可以使用基于云的方法开发。提出了关于门户访问级别的用例定义,并特别注意了提供统一访问所需的数据的不同时间和空间尺度。智能电网体系结构模型(SGAM)中定义的信息层属性反映在正式定义的用例中。通过考虑统一的访问流程和基于角色的安全访问控制,通过可信云平台的用例定义演示了不同的访问级别。
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引用次数: 9
Efficiency Investigation of A Protection and Correction Solid State Device for Low-Voltage Distribution Networks 一种低压配电网保护校正固态装置的效率研究
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893523
S. Ioannou, C. Marouchos, M. Darwish, G. Putrus
A Solid State device which can limit and interrupt a fault, apply power factor correction and voltage regulation under normal conditions is presented with an investigation of its efficiency. The losses of the switching semiconductors are investigated by employing the PSIM Thermal Module. This work closely investigates the phase shift between the current and voltage waveforms for a 50Hz system and switching frequency of 5kHz before modelling and calculating the IGBT losses. For DC/DC converters the associated currents and voltages are in phase. However, as this work shows for switched capacitor circuits there is a 90° phase shift between current and voltage. Finally, calculated losses are compared to simulated losses as well as to other methodologies suggested in literature.
提出了一种能在正常情况下限制和中断故障、进行功率因数校正和电压调节的固态器件,并对其效率进行了研究。利用PSIM热模块研究了开关半导体的损耗。在建模和计算IGBT损耗之前,这项工作密切研究了50Hz系统和5kHz开关频率下电流和电压波形之间的相移。对于DC/DC转换器,相关的电流和电压是同相的。然而,正如这项工作所显示的,对于开关电容电路,电流和电压之间存在90°的相移。最后,将计算损失与模拟损失以及文献中建议的其他方法进行比较。
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引用次数: 4
Quasi Dynamic Simulation for the Voltage Control in the Active Networks, Oman Case Study 主动电网电压控制的准动态仿真,阿曼案例研究
Pub Date : 2019-11-07 DOI: 10.1109/UPEC.2019.8893529
A. Al-Nadabi, L. Cipcigan
the transition of passive distribution network towards being active network results in many operation challenges. Voltage control is one of these challenges. This paper has studied the effectiveness of four voltage controlling techniques in a real 132/33/11kV distribution network from Oman which are on-load tap changer control, energy storages installation, transformer tap staggering and power curtailment control. The network has been stressed by large penetration of solar photovoltaic and wind farm power plants. Each techniques have performed differently in maintaining the voltages profile within the statutory limits ±6%. The lowest effectiveness level is the power curtailment, and that is due to the high X/R ratio, as the studied network constitute of overhead lines more than cable lines. Regarding losses reduction effects, energy storage was the highest efficient method whereas the transformer tap staggering control was the lowest efficient method. Moreover, Quasi Dynamic simulation method was used for variable load modeling which has increased the opportunity of large DGs accommodation compared to the static load simulation.
无源配电网向有源配电网的转变给配电网的运行带来了诸多挑战。电压控制就是其中一个挑战。本文研究了阿曼某实际132/33/11kV配电网中有载分接开关控制、储能装置、变压器分接交错和限电控制四种电压控制技术的有效性。太阳能光伏和风力发电厂的大规模渗透给电网带来了压力。每种技术在保持电压分布在法定限制±6%范围内的表现不同。效率最低的是限电,这是由于X/R比高,因为所研究的网络由架空线路组成,而不是电缆线路。在减损效果方面,储能是效率最高的方法,变压器分接交错控制是效率最低的方法。此外,采用准动态模拟方法进行变负荷建模,与静态负荷模拟相比,增加了适应大dg的机会。
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引用次数: 0
期刊
2019 54th International Universities Power Engineering Conference (UPEC)
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