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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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Device for Automatic Particle Size Analysis and the of Sedimentation Using Pattern Recognition 采用模式识别的自动粒度分析及沉降装置
D. Martins, Wesley Pacheco, V. Damin
This article describes the operation of an device for automatic particle size analysis and the of sedimentation using pattern recognition. The device performs measurement in 32 levels and for each level an electric voltage curve is generated; the combination of the 32 curves forms a data matrix that characterizes the soil sedimentation behavior. The matrix is then subjected to classification by pattern recognition by neural network perceptron of multiple layers; previously trained with reference samples. The neural network classifies the soil texture by identifying the probabilities of the sample being tested as one of the reference samples.
本文介绍了一种利用模式识别进行粒度自动分析和沉降的装置的操作。该装置在32个电平中进行测量,并为每个电平生成电压曲线;32条曲线的组合形成了表征土壤沉降行为的数据矩阵。然后通过多层神经网络感知器进行模式识别对矩阵进行分类;之前用参考样本训练。神经网络通过识别被测样本作为参考样本的概率来对土壤质地进行分类。
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引用次数: 0
Self-Consumption Improvement for a Nanogrid with Photovoltaic and Vehicle-to-Home Technologies 利用光伏和车对户技术改善纳米电网的自耗
Francesco Giordano, A. Ciocia, P. Di Leo, F. Spertino, A. Tenconi, S. Vaschetto
This article investigates the contribution to the self-consumption achievable appropriately exploiting the battery of an Electric Vehicle (EV) in a residential nano-grid with photovoltaic generation. A battery energy management algorithm is presented and different scenarios of EV usage for different kinds of users have been investigated. Two households located in Northern and Southern Italy, respectively, are taken in examination. The results show that, even in the worst case, a remarkable increment on self-consumption is achieved with respect to the case without EV.
本文研究了在住宅纳米电网中适当利用光伏发电的电动汽车(EV)电池对实现自我消费的贡献。提出了一种电池能量管理算法,并对不同类型用户使用电动汽车的不同场景进行了研究。分别位于意大利北部和南部的两个家庭接受了检查。结果表明,即使在最坏的情况下,相对于没有电动汽车的情况,自我消费也有显著的增加。
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引用次数: 7
Optimal Dynamic Tariffs for Flexible Ramp Market in the Presence of Wind Power Generation and Demand Response 考虑风力发电和需求响应的柔性坡道市场最优动态电价
G. Osório, M. Shafie‐khah, Nuno G. S. Soares, J. Catalão
The uncertainty and variability as a consequence of modern utilization of wind power in the electrical system besides unpredicted contingencies of the system components can impose crucial challenges on the Independent System Operator's (ISO) performance. In such a situation, increasing operational flexibility is the main way to cover wind power unpredictability and to enable secure operation of the power system. To this end, this paper proposes a flexible security-constrained program to schedule supply-side and demand-side via an optimal pricing and incentive scheme. The considered demand response (DR) programs include time of use (TOU), real-time pricing (RTP), critical peak pricing (CPP), as well as emergency demand response program (EDRP). The study aims to find the most effective DR scheme among a set of DR programs to improve the efficiency of electricity markets while guaranteeing the security and environmental restrictions through minimization of two objective functions, the ISO's operational cost and pollutant emissions from generation units.
现代电力系统中风力发电的不确定性和可变性,以及系统组件不可预测的偶然性,对独立系统运营商(ISO)的性能构成了重大挑战。在这种情况下,提高运行灵活性是克服风电不可预测性和保障电力系统安全运行的主要途径。为此,本文提出了一个灵活的安全约束方案,通过最优定价和激励方案来调度供给侧和需求侧。考虑的需求响应(DR)计划包括使用时间(TOU)、实时定价(RTP)、关键峰值定价(CPP)以及紧急需求响应计划(EDRP)。本研究的目的是在一组DR方案中找到最有效的DR方案,以提高电力市场的效率,同时通过最小化两个目标函数(ISO的运营成本和发电机组的污染物排放)来保证安全和环境限制。
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引用次数: 5
Time Domain Based Security Enhancement Methodologies for Transformer Differential Protection Scheme 基于时域的变压器差动保护方案安全增强方法
P. Kumari, Rathinam Ananthanarayanan, S. Balamurugan
This paper proposes security enhancement algorithms for transformer differential protection, which claims to augment the unit security by providing required sensitivity during internal fault conditions and stability for external faults. The proposed algorithm is executed by modelling a biased differential characteristic and developing algorithms for security issues in a transformer considering the most predominant system conditions i.e. inrush condition during transformer energization and CT saturation during heavy through fault conditions. Detection of inrush currents were performed using statistical analysis of differential power and using a discrimination index. CT saturation detection is independent of current waveform analysis and is based on the calculation of the saturation time. The proposed algorithms are evaluated and validated under different scenarios using MATLAB/Simulink environment and investigative study is performed. The results are visualized as current trajectories plotted on the relay operating characteristics summarized for easy conception of the algorithm.
本文提出了变压器差动保护的安全增强算法,该算法通过在内部故障条件下提供所需的灵敏度和在外部故障条件下提供稳定性来提高机组的安全性。该算法通过建模一个有偏微分特性,并考虑到变压器上电时最主要的系统条件,即变压器上电时的涌流条件和重故障时的CT饱和条件,开发变压器安全问题的算法来执行。采用差分功率的统计分析和判别指标对浪涌电流进行检测。CT饱和检测不依赖于电流波形分析,而是基于饱和时间的计算。在MATLAB/Simulink环境下对所提出的算法进行了不同场景下的评估和验证,并进行了调查研究。结果显示为在继电器工作特性上绘制的电流轨迹,以便于算法的概念。
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引用次数: 0
Outdoor Workers Exposed to UV Radiation: Comparison of UV Index Forecasting Methods 暴露于紫外线辐射的户外工人:紫外线指数预测方法的比较
F. Leccese, G. Salvador, D. Lista, C. Burattini
Ultra-Violet (UV) radiation covers only a minimal part of solar spectrum (5%) but produces severe effects on human health. Everyone is exposed to Sun but some outdoor workers categories are exposed not only in their leisure time but also during their working activities. To protect outdoor workers health, daily estimates of UV radiation are needed and without a national service providing a measured UV Index (UVI) in the Italian territory, UVI forecasting methods are welcomed. Forecasting methods can be classified in two major groups: methods based on the estimation of the UV total irradiance from solar total irradiance and methods based on regression models of measured UVIs. The former have greater uncertainties (about 30%) and are more suitable for epidemiologic studies, the latter, due to their better precision (about 10-20%), are more suitable for daily UVI evaluation.
紫外线(UV)辐射只覆盖太阳光谱的极小部分(5%),但对人体健康产生严重影响。每个人都暴露在阳光下,但一些户外工作者不仅在闲暇时间,而且在工作活动中也暴露在阳光下。为了保护户外工作人员的健康,需要对紫外线辐射进行每日估计,意大利境内没有提供测量紫外线指数(UVI)的国家服务机构,因此欢迎紫外线指数预测方法。预测方法可分为两大类:基于太阳总辐照度估算紫外线总辐照度的方法和基于实测紫外线回归模型的方法。前者的不确定性较大(约30%),更适用于流行病学研究;后者的精度较好(约10-20%),更适用于日常UVI评估。
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引用次数: 11
Aspects Regarding the Dimensioning of the Analog Circuits with Magnetically Coupled Coils 关于磁耦合线圈模拟电路尺寸的几个问题
I. Sirbu
As many applications in electrical engineering use circuits that include magnetic coupling coils, this paper aims to analyze their operation in permanent sinusoidal regime. It will be determined and will be taken into account the influence that certain parameters of the circuit have on some more important features. In order to obtain optimal performance, conditions will be imposed and relations that the quantities must verify will be derived. Two cases of practical utility were analyzed in detail: the case of two coupled coils in series and the case of the magnetically coupled coils used in wireless power transfer. The imposed condition referred to obtain a maximum value for the power transmitted to the load, respectively for the current through it. This has resulted in various relations and restrictions imposed on the parameters of the circuit.
由于电气工程中的许多应用都使用包含磁耦合线圈的电路,本文旨在分析它们在永久正弦状态下的工作。将确定并考虑到电路的某些参数对某些更重要的特性的影响。为了获得最佳性能,将施加条件,并推导出数量必须验证的关系。详细分析了两个耦合线圈串联和磁耦合线圈在无线电力传输中的实际应用情况。所施加的条件指的是获得传输到负载的功率的最大值,分别为通过它的电流。这导致了对电路参数施加的各种关系和限制。
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引用次数: 0
Conversion Error of Exponential to Second Order Polynomial ZIP Load Model Conversion 指数到二阶多项式ZIP负荷模型转换的转换误差
M. Leinakse, J. Kilter
This paper presents two novel analytical methods for exponential to second order polynomial (i.e. ZIP) load model conversion. The load model conversion error of the proposed methods and three known methods is compared based on the results of conducted numerical analysis. The conversion accuracy of the proposed analytical methods was found to be better than the accuracy of previously known analytical conversion method. In some cases, the conversion error of proposed methods was comparable to non-linear least squares conversion results. It is also shown that the load model conversion error depends on the used conversion method, exponential load model parameter values and the voltage used for error calculation.
本文提出了指数到二阶多项式(即ZIP)负荷模型转换的两种新的解析方法。在数值分析的基础上,比较了所提方法与三种已知方法的负荷模型转换误差。所提出的分析方法的转换精度优于先前已知的分析转换方法的精度。在某些情况下,所提出方法的转换误差与非线性最小二乘转换结果相当。计算结果还表明,负荷模型转换误差取决于所采用的转换方法、指数负荷模型参数值和误差计算所用的电压。
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引用次数: 4
Work Function Determination of Transparent Contact for a:Si/c-Si Heterojunction Solar Cells a:Si/c-Si异质结太阳能电池透明接触的功函数测定
L. Lancellotti, E. Bobeico, M. Della Noce, P. Delli Veneri, I. Matacena
It has been largely demonstrated that the a-Si/c-Si heterojunction solar cells can reach high efficiency. A central role in this type of structure is played from the transparent contact workfunction, whose value affects strongly the heterojunction's band structure at the interface with the other layers of the cell. In the present work, different materials have been fabricated in order to test and optimize their application as transparent contacts in our heterojunction solar cells. The workfunction mapping through Scanning Kelvin Probe technique has been used to characterize the electronic surface morphology and homogeneity of the realized layers and to determine the mean workfunction values over the scanned areas.
大量研究表明,a-Si/c-Si异质结太阳能电池具有很高的效率。透明接触功函数在这种结构中起着核心作用,它的值强烈地影响着异质结与细胞其他层界面处的能带结构。在目前的工作中,为了测试和优化它们在我们的异质结太阳能电池中作为透明触点的应用,我们制作了不同的材料。通过扫描开尔文探针技术的工作函数映射被用来表征实现层的电子表面形貌和均匀性,并确定扫描区域的平均工作函数值。
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引用次数: 9
Optimal Operation of PV-Diesel MicroGrid with Multiple Diesel Generators Under Grid Blackouts 电网停电条件下多台柴油发电机组PV-Diesel微电网的优化运行
Mansour Alramlawi, Ayeni Femi Timothy, A. Gabash, E. Mohagheghi, Pu Li
This paper addresses the optimal operation problem of a PV-diesel microgrid considering grid blackouts, which is a usual case of discontinuous power supply in developing countries. The model of a grid-connected PV-diesel microgrid is enhanced, and new practical constraints are added. In addition, a new mixed-integer nonlinear programming (MINLP) problem is formulated to optimize the power flow in the microgrid for covering the load while minimizing the power consumption cost as well as maximizing the dispatched power from the PV-array. To demonstrate the applicability of the developed model and the optimal operation strategy, a comparison between different system configurations is made. The results show that the proposed microgrid can reduce the dispatched power cost while decreasing the power curtailment from the PV-array. Moreover, installing multiple diesel generators (DGs) can significantly reduce the fuel consumption by the DGs in comparison to a single DG in the PV-diesel microgrid.
本文研究了考虑电网停电的光伏-柴油微电网的最优运行问题,这是发展中国家电力供应不连续的常见情况。对并网的光伏-柴油微电网模型进行了改进,增加了新的实际约束条件。此外,提出了一种新的混合整数非线性规划(MINLP)问题,以优化微电网的潮流,以覆盖负载,同时使电力消耗成本最小化,并使光伏阵列的调度功率最大化。为了证明所建立的模型和最优运行策略的适用性,对不同的系统配置进行了比较。结果表明,所提出的微电网在减少光伏阵列的弃电的同时,可以降低调度的电力成本。此外,与光伏-柴油微电网中的单个柴油发电机相比,安装多个柴油发电机(DG)可以显著减少DG的燃料消耗。
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引用次数: 15
Techniques to Increase the Efficiency of Small Hydro Power Plants with Induction Machine 利用感应电机提高小型水力发电厂效率的技术
O. Rubeš, J. Knobloch, D. Cervinka
A small hydro power plant (SHPP) is one possible type of renewable energy sources. It could be placed on small streams without any tall buildings, which makes the SHPP friendly to the environment. However, a SHPP has an induction generator which operates efficiency in nominal power but not in lower power. This paper deals with a method to increase the efficiency in low power with reducing the stator voltage. This method was described earlier and now the key point is to describe possible techniques to decrease the stator voltage. For each of these techniques energy savings in a year period will be calculated and financial savings will be demonstrated in comparison to the cost of the used technical system.
小型水力发电厂(SHPP)是一种可能的可再生能源。它可以放置在小溪流上,没有任何高层建筑,这使得SHPP对环境友好。然而,一个SHPP有一个感应发电机,其运行效率在标称功率,但不是在较低的功率。本文研究了一种在低功率下通过降低定子电压来提高效率的方法。前面已经介绍了这种方法,现在的重点是描述降低定子电压的可能技术。对于每一种技术,将计算一年内节省的能源,并将与所用技术系统的成本进行比较,证明节省的资金。
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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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