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2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)最新文献

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Energy efficiency improvements in italian historical buildings: The case study of Ascoli Piceno 意大利历史建筑的能效改进:Ascoli Piceno的案例研究
R. C. Grifoni, E. Petrucci, S. Tascini, M. Pierantozzi, D. Lapucci, G. E. Marchesani
Evaluating the energy efficiency of historical buildings is an important theme nowadays, with European directives that fix a strong reduction in energy use and impose an increase in the amount of energy produced by renewable sources. Within restoration and other related disciplines, it is therefore necessary that a specific method of investigation for historical buildings be developed. The methodological approach of energy efficiency in historical buildings, from the building scale to the urban scale, must account for the particular characteristics of historical buildings. Each operation should be carefully examined in each case and defined within a grid of possible interventions that can combine conservation and innovation. Public administrations have also recently addressed these themes to evaluate medium and long-term strategies useful in more effectively managing the heritage. These objectives form the basis for recent research involving the city of Ascoli Piceno. The aim is to provide the entities that manage the cultural heritage with criteria and methods to completely and critically assess historical buildings while also duly considering aspects related to their energy performance.
评估历史建筑的能源效率是当今一个重要的主题,欧洲指令规定大力减少能源使用,并增加可再生能源的发电量。因此,在修复和其他相关学科中,有必要开发一种特定的历史建筑调查方法。历史建筑节能的方法论方法,从建筑规模到城市规模,都必须考虑到历史建筑的特殊性。每一项操作都应该在每种情况下仔细检查,并在可以结合保护和创新的可能干预措施的网格中进行定义。公共行政部门最近也讨论了这些主题,以评估有助于更有效地管理遗产的中长期战略。这些目标构成了最近涉及阿斯科利皮切诺市的研究的基础。其目的是为管理文化遗产的实体提供标准和方法,以全面和批判性地评估历史建筑,同时适当考虑与能源性能相关的方面。
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引用次数: 0
Impact of Photovoltaic Generators on the Three Phase Short Circuit Operating Conditions 光伏发电机组三相短路工况的影响
L. Alfieri, G. Carpinelli, A. Bracale, P. Caramia, A. D. Di Fazio
Distributed generation (DG) produces many benefits for the distribution systems that are operated as active systems, even if they have been traditionally designed as passive networks. Then, new technical issues must be addressed, involving both normal and abnormal operating conditions such as short circuits. Photovoltaic systems (PVSs) are among the most diffuse DG and their contributions to the short-circuit operating conditions depend on several factors, such as environmental conditions, PVS inverter control characteristics, self-protection systems, and fault location and type. An analytical model that aims at quickly and accurately analyzing the three-phase short-circuit operating conditions in a distribution system in presence of PVSs is presented in this paper. The model is applied to a typical North American MV network characterized by large penetration of PVSs, investigating the influence of the aforementioned factors.
分布式发电(DG)为作为有源系统运行的配电系统带来了许多好处,即使它们传统上被设计为无源网络。然后,必须解决新的技术问题,包括正常和异常操作条件,如短路。光伏系统(pv)是最分散的DG之一,其对短路运行条件的贡献取决于几个因素,如环境条件、pv逆变器控制特性、自我保护系统以及故障位置和类型。本文提出了一种分析模型,旨在快速准确地分析有pvs存在的配电系统三相短路运行情况。将该模型应用于一个典型的北美MV网络,该网络的特点是PVSs的渗透率很大,研究了上述因素的影响。
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引用次数: 4
Loss of Field Protection of Synchronous Generator in a Realistic Framework Using RTDS RTDS在现实框架下的同步发电机失磁保护
Abbas Hasani, F. Haghjoo, F. D. da Silva, C. Bak
This paper suggests an appropriate framework for synchronous generator loss of field (LOF) protection studies by using RSCAD software incorporated with real-time digital simulator (RTDS). A single machine system is modeled in RSCAD environment and LOF studies are done precisely on it. Various types of LOF events, including short circuit and open circuit with crowbar or surge-arrester activation, which cannot be studied in common kinds of power system software, are investigated. The obtained results demonstrate that the generator dynamics differ in the face of various LOF failures. Therefore, the effectiveness of the mentioned framework for LOF protection studies becomes clear.
利用RSCAD软件结合实时数字模拟器(RTDS),提出了一种适用于同步发电机失磁保护研究的框架。在RSCAD环境下对单机系统进行建模,并对其进行了精确的LOF研究。研究了各种类型的LOF事件,包括由撬棍或避雷器激活的短路和开路,这些事件在常用的电力系统软件中无法研究。结果表明,在不同的LOF失效情况下,发电机的动力学特性是不同的。因此,上述LOF保护研究框架的有效性变得清晰。
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引用次数: 5
Analysis of the Sensitivity of the Extended Kalman Filter Based Inertia Estimation Method to the Assumed Time of Disturbance 基于扩展卡尔曼滤波的惯性估计方法对假定扰动时间的灵敏度分析
D. D. Giudice, S. Grillo
The inertia constant of an electric power system determines the frequency behavior immediately after a disturbance. The increasing penetration of renewable energy sources is leading to a smaller and more variable inertia, thereby compromising the frequency stability of modern grids. Therefore, a real-time estimation of the inertia would be beneficial for grid operators, as they would become more aware of the frequency stability of their grids. This paper focuses on an estimation method based on the extended Kalman filter. To be started, such method requires the knowledge of the time of disturbance, which, in turn, needs to be estimated. The purpose of this paper is to evaluate the sensitivity of the extended Kalman filter based inertia estimation method to the assumed time of disturbance.
电力系统的惯性常数决定了扰动后的频率行为。可再生能源的日益普及正在导致更小和更可变的惯性,从而损害现代电网的频率稳定性。因此,对惯性的实时估计将有利于电网运营商,因为他们将更加了解其电网的频率稳定性。本文研究了一种基于扩展卡尔曼滤波的估计方法。这种方法首先需要知道扰动的时间,然后对扰动的时间进行估计。本文的目的是评估基于扩展卡尔曼滤波的惯性估计方法对假定扰动时间的灵敏度。
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引用次数: 18
Tower-Type Flow Accelerators for a Wind Power Plant 风力发电厂塔式气流加速器
A. Bubenchikov, T. V. Bubenchikova, Shepeleva E. Yu, V. Salnikov, E. Ivanova
The article considers six-bladed designs of an air flow accelerator of a simplified type. The geometry of channels allowing to increase the velocity of the air ram in 2.75 times is determined. The design accelerating the ram air by 55% and increasing the power generated by the wind turbine threefold is described.
本文研究了简化型气流加速器的六叶片设计。通道的几何形状允许增加2.75倍的空气冲压速度是确定的。该设计使冲压空气加速55%,使风力发电机的发电量增加三倍。
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引用次数: 1
Statistical Assessment of Lightning-Induced Overvoltages in Low Voltage Lines 低压线路雷击过电压的统计评定
F. Napolitano, F. Tossani, J. D. R. Penaloza, A. Borghetti, G. Piparo, C. Mazzetti, C. Nucci
The aim of the paper is to present an efficient procedure for the accurate assessment of the frequency of lightning-originated faults in low voltage distribution lines. The advantage of the proposed procedure lies in the application of the stratified sampling technique, which allows to reduce the computational effort required by the Monte Carlo method. Indeed, such a sampling technique is particularly effective when the collecting area is very large, as in the lightning performance analysis of low voltage lines. The paper shows the results for the case of an overhead cable line and similar results have been obtained for a line with bare conductors. The procedure is also applied for the selection of surge protective devices through the assessment of the statistical distribution of their absorbed charges.
本文的目的是提出一种准确评估低压配电线路雷击故障频率的有效方法。该方法的优点在于应用了分层抽样技术,从而减少了蒙特卡罗方法所需的计算量。事实上,当采集区域非常大时,如在低压线路的雷电性能分析中,这种采样技术特别有效。本文给出了架空电缆情况下的结果,对于裸导线线路也得到了类似的结果。该程序也适用于通过评估其吸收电荷的统计分布来选择电涌保护装置。
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引用次数: 0
Risk Analysis of Levelized Cost of Electricity to Renewable Energy in Brazil 巴西可再生能源电力平准化成本的风险分析
Daywes Pinheiro-Neto, Elder GeraldoDomingues, Luane SchiochetPinto
This paper presents a risk analysis approach of levelized cost of electricity (LCOE) to renewable energy in Brazil: hydro, wind, and photovoltaic energy. The Monte Carlo method is applied to stochastic models to generate synthetic time series of four random variables: water inflow, wind speed, solar irradiance, and temperature of photovoltaic panel. Probability distribution of the levelized cost of electricity for the three sources are provided and analyzed. In addition, a sensitivity analysis was performed considering two key parameters: investment expenditure and discount rate, where a comparative analysis between sources is carried out. The results provide important risk information to assist policy makers and investors in the decision-making process.
本文提出了巴西水电、风能和光伏等可再生能源的平准化电力成本(LCOE)风险分析方法。将蒙特卡罗方法应用于随机模型,生成由进水、风速、太阳辐照度、光伏板温度四个随机变量组成的合成时间序列。给出并分析了三种源的平准化电费的概率分布。此外,考虑两个关键参数:投资支出和贴现率进行敏感性分析,其中对来源进行了比较分析。研究结果为政策制定者和投资者在决策过程中提供了重要的风险信息。
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引用次数: 3
Short-Term Forecasting of District Heating Demand 区域供热需求的短期预测
R. Petrichenko, D. Sobolevsky, A. Sauhats
Focus of the paper is statistical data pre-processing before it applies for prediction the thermal load in district heating networks, focusing on day-ahead hourly planning. Such a planning is highly important for cogeneration plants participating in electricity wholesale markets. Article considers the possibility of correcting detected inconsistencies into district heating statistical data using forecasted values of the heat demand. The case study is based on the examples of heat supply of a large city, gas fired cogeneration power plants and real world data. The cost of errors in the prediction of heat consumption is estimated.
本文的研究重点是统计数据在应用于区域供热网热负荷预测前的预处理,重点是日前时规划。这样的规划对于参与电力批发市场的热电联产电厂是非常重要的。本文考虑了利用热需求预测值对区域供热统计数据中检测到的不一致进行校正的可能性。本案例研究以某大城市供热、燃气热电联产电厂为例,结合实际数据。对热耗预测误差的代价进行了估计。
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引用次数: 3
Daily Operation Optimization for Grid-Connected Hybrid System Considering Short-Term Electricity Price Forecast Scheme 考虑短期电价预测方案的并网混合动力系统日运行优化
Pedro Bento, Hugo Nunes, J. Pombo, S. Mariano, Maria do Rosário Calado
With an increasing public and governmental awareness regarding environment protection and sustainable resources, hand-in-hand with an escalating electricity demand, the exponential growth of renewable energy generation capacity has been the “answer”. Mitigating the environmental harms associated with the more conventional energy sources such as: coal, oil, gas and nuclear. Nonetheless, some challenges remain, particularly concerning the integration of these technologies into the conventional generation mix. Hybrid energy systems allow a paradigm shift from a concentrated conventional generation to a more distributed one. This paper discusses the optimized PV-wind with hydro and battery storage capabilities for a grid-connected application considering the Short-Term Price Forecast information. The proposed technique has been tested in different scenarios, and results demonstrate the effectiveness of the proposed approach.
随着公众和政府对环境保护和可持续资源的意识日益增强,再加上电力需求的不断增长,可再生能源发电能力的指数级增长已成为“答案”。减轻与煤炭、石油、天然气和核能等传统能源相关的环境危害。尽管如此,仍然存在一些挑战,特别是将这些技术整合到传统的发电组合中。混合能源系统允许从集中的传统发电模式转变为更分散的发电模式。本文讨论了考虑短期价格预测信息的并网应用中具有水电和电池存储能力的PV-wind优化方案。在不同的场景下对所提出的技术进行了测试,结果证明了所提出方法的有效性。
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引用次数: 1
Safety Analysis of TN-S and TN-C-S Earthing System TN-S和TN-C-S接地系统的安全性分析
Krishnav Bhatia, P. Darji, H. Jariwala
This paper presents safety analysis of TN-S and TN-C-S earthing system considering different sizes of cable and protective earthing conductor (PEC). For this purpose, touch voltage and electric shock calculations are presented. In TN-C-S system, even with the main protective bonding (MPB) and in TN-S system in spite of local grounding at consumer end, computed touch voltages are quite high and thus unsafe for human. Therefore, to safeguard the persons against dangerous touch voltages in both the earthing systems, novel way of protection that is bonding of grounding grid to the exposed conductive part (ECP) of consumer load is proposed in this paper. Also, grid augmentation is investigated for hazardous step and touch voltages. Based on the two cases, that is with and without bonding the ECP of load to grid, touch voltage assessments are done. The results show that with bonding, touch voltages are reduced substantially. Therefore, safety and reliability of the systems are ensured.
本文对TN-S和TN-C-S接地系统的安全性进行了分析,考虑了不同尺寸的电缆和保护接地导体(PEC)。为此,给出了接触电压和电击的计算。在TN-C-S系统中,即使有主保护键合(MPB),在TN-S系统中,尽管在消费者端有局部接地,但计算出的接触电压仍然很高,对人体不安全。因此,为了保护两个接地系统中的人员免受危险接触电压的伤害,本文提出了一种新的保护方法,即将接地网连接到用户负载的暴露导电部分(ECP)。此外,还研究了危险步进电压和接触电压下的栅格增强。根据负载与电网连接ECP和不连接ECP两种情况,进行了接触电压评估。结果表明,通过键合,触摸电压大大降低。从而保证了系统的安全性和可靠性。
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引用次数: 1
期刊
2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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