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2020 21st International Scientific Conference on Electric Power Engineering (EPE)最新文献

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Photodetectors for cylindrical illuminance sensor 用于圆柱形照度传感器的光电探测器
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269220
Michal Kozlok, P. Žák
The paper describes the basic principles of illuminance measurement and possibilities of multi-point measurement of light field spatial properties. Based on the research, the description contains three steps of the development of a multi-point cylindrical illuminance sensor and their hardware architectures. The development aims to create a functional prototype that would allow measurement in addition to one scalar quantity of cylindrical illuminance also the prevailing direction of light in one plane in space, symmetrical, diffuse component, and visual appearance indicator calculated from the ratio of horizontal and cylindrical illuminance.
本文介绍了照度测量的基本原理和多点测量光场空间特性的可能性。在此基础上,介绍了多点圆柱形照度传感器的三个开发步骤及其硬件结构。该开发旨在创建一个功能原型,除了可以测量一个标量的圆柱形照度,还可以测量空间中一个平面上的主要光方向,对称,漫射分量,以及从水平和圆柱形照度的比例计算的视觉外观指标。
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引用次数: 0
Investigation of a Damaged Filter-Compensation Unit 损坏滤波器补偿装置的调查
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269199
Stanislav Nowak, S. Kocman
Nowadays, almost 50% of steel is made from steel scrap by electric heating and melting, mostly in arc furnaces. The electric arc furnace with all its equipment is often a key unit in the entire steel manufacturing process. Therefore, all electric arc furnace equipment must be designed with respect to the requirement of high reliability for long-term operation under very hard conditions in the steel mill. A very important part of the furnace installation is the device that compensates the undesirable reactive power and also reduces the voltage distortion in the supply grid. A filter-compensation unit is used for this purpose. During the operation of the filter-compensation unit in an investigated furnace installation a failure occurred, whose causes are described in this paper.
如今,几乎50%的钢是由废钢通过电加热和熔化制成的,主要是在电弧炉中。电弧炉及其所有设备往往是整个炼钢过程中的关键设备。因此,所有电弧炉设备的设计都必须考虑到高可靠性的要求,以适应钢厂在非常恶劣的条件下长期运行。加热炉安装的一个非常重要的部分是补偿不需要的无功功率和降低电网电压畸变的装置。滤波器补偿单元用于此目的。本文介绍了某加热炉过滤补偿装置在运行过程中发生的故障,并阐述了故障发生的原因。
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引用次数: 0
A Review of the Holonic Architecture for the Smart Grids and the Self-Healing Application 智能电网的全息结构及其自愈应用综述
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269182
M. F. Abdel-Fattah, Hannah L. Kohler, Peter Rotenberger, Leonard Schöler
Smart grid is the network of the future. However, many questions still remain about the exact structure of the grid. This paper aims to explain the idea behind the holonic architecture of smart grids and give a framework on self-healing within this architecture. The state of the art is presented with different organization structures that are proposed for smart-grids applications, as well as the potential the holonic structure brings along and also the challenges that must be dealt with. The framework for self-healing from faults, or interruption, is presented, including prerequisites, quality coefficients evaluation and development, and the self-healing procedure. Some thoughts regarding the application of holonic architecture for self-healing function in smart grids, are also presented.
智能电网是未来的网络。然而,关于网格的确切结构仍然存在许多问题。本文旨在解释智能电网全息架构背后的思想,并给出该架构中自我修复的框架。介绍了智能电网应用中不同组织结构的现状,以及全息结构带来的潜力和必须应对的挑战。提出了故障或中断自修复的框架,包括先决条件、质量系数的评估和开发以及自修复过程。本文还就全息结构在智能电网自愈功能中的应用提出了一些思考。
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引用次数: 0
Electric Vehicle Charging Loads in Residential Areas of Apartment Houses 公寓小区电动汽车充电负荷研究
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269191
Oula Lehtinen, Sami Pitkäniemi, Atte Weckman, Mikael Aikio, Michel Mabano, M. Lehtonen
Electric vehicle (EV) charging is expected to constitute a substantial part of the power demand in residential areas in the future. Its effects on the principles of distribution network planning and load profiles need to be studied. In this paper, we evaluate the feasibility of replacing the conventional cars with EVs in Finnish district heated apartment house areas. Stochastic simulation is used to combine a probabilistic charging model and electricity consumption data. We estimate the effects of uncontrolled, curtailed and price-optimized residential EV charging with different charging powers defined in the standards. The simulation results show that with 11.1 kW and 22.2 kW uncontrolled charging, the example apartment house connections would be overloaded. It is also found that the price-optimized charging should include a coordinated control logic that supports the local grid. With 1.84 kW charging, the power demand stays within the acceptable limits, but the coincidence factor increases from 0.2 to 0.63-0.93.
电动汽车(EV)充电预计将构成未来居民区电力需求的重要组成部分。其对配电网规划原则和负荷分布的影响有待研究。在本文中,我们评估了在芬兰区域供暖公寓地区用电动汽车取代传统汽车的可行性。采用随机仿真方法,将概率充电模型与电力消耗数据相结合。在不同充电功率下,分别对住宅电动汽车充电不受控制、限制和价格优化的效果进行了评估。仿真结果表明,在11.1 kW和22.2 kW不可控充电情况下,示例公寓住宅连接将出现过载。研究还发现,价格优化收费应包含支持本地电网的协调控制逻辑。充电功率为1.84 kW时,电力需求仍在可接受范围内,但符合因子从0.2增加到0.63-0.93。
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引用次数: 5
Impact of Cable Impedance on the Harmonic Emission of LED Lamps 电缆阻抗对LED灯谐波发射的影响
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269271
M. N. Iqbal, L. Kütt, B. Asad, Noman Shabbir
This paper presents the effect of installation cables on the current harmonics emission due to nonlinear loads. Climate change and volatile fuel prices are persuading policy-making institutions to move in the direction of energy efficiency practices. The energy-efficient models of household appliances contain power electronic circuits and, thus, a source of current harmonics. In order to estimate the influence of current harmonics on the distribution network, an accurate assessment of power quality is required when the non-linear sources are connected to the distribution grid. However, accurate assessment is a challenging task because of the involvement of various uncertainties. This paper focuses on the influence of installation cables on the current harmonics connected with the nonlinear devices.
本文讨论了安装电缆对非线性负载引起的电流谐波发射的影响。气候变化和不稳定的燃料价格正在说服决策机构朝着提高能源效率的方向发展。家用电器的节能模型包含电力电子电路,因此是电流谐波的来源。为了估计电流谐波对配电网的影响,需要对非线性电源接入配电网时的电能质量进行准确的评估。然而,由于涉及各种不确定因素,准确评估是一项具有挑战性的任务。本文着重研究了安装电缆对与非线性装置连接的电流谐波的影响。
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引用次数: 3
A Relation of the Parameters of Grounding Device with the Level of Over-voltage when a Surge Arrester Triggered 避雷器触发时接地装置参数与过电压水平的关系
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269253
Yuri E. Adamyan, I. S. Kolodkin, S. Krivosheev, S. Magazinov, V. Titkov, Konstantin V. Iakushov
It is known that high-frequency rapidly damped oscillations occur at the front of the voltage pulse remaining after the operation of the nonlinear surge arrester (SPD). The amplitude of these oscillations is determined by the circuit properties in which the SPD stands, and it can significantly exceed the level of the remaining voltage at the SPD, negatively affecting the internal insulation of the high-voltage equipment elements. The parameters of these high-frequency oscillations are determined by the grounding device (GD) parameters in which the SPD is connected. Due to the results analysis of the numerical simulation of the current flow processes in the GD, it is shown that the GD impedance is complex, and the transient resistance of the GD can be used to describe the GD reaction to pulsed action. A distinctive feature of the transient resistance is their high sensitivity to load parameters in the high-frequency interval of the action (at the pulse front) and the steady-state value of the GD resistance after 10–20 microseconds, determined in stationary modes. The maximum values of high-frequency overvoltages are determined by the maximum values of a transient resistance. The numerical simulation results of the lightning current spreading process in a 3D formulation for various GD configurations showed that there is an optimal parameters ratio depending on the time constant of the soil (the product of dielectric constant and conductivity), at which minimum amplitudes of high-frequency oscillations are observed.
已知在非线性避雷器(SPD)工作后剩余的电压脉冲前端会发生高频快速阻尼振荡。这些振荡的幅度是由SPD所在的电路特性决定的,它可以显著超过SPD的剩余电压水平,对高压设备元件的内部绝缘产生负面影响。这些高频振荡的参数由防雷器所连接的接地装置(GD)参数决定。通过对GD内电流流动过程的数值模拟结果分析,表明GD阻抗是复杂的,GD的瞬态电阻可以用来描述GD对脉冲作用的反应。瞬态电阻的一个显著特征是它们对动作的高频间隔(在脉冲前)的负载参数和在静止模式下确定的10-20微秒后的GD电阻的稳态值具有高灵敏度。高频过电压的最大值由瞬态电阻的最大值决定。对不同GD构型下三维雷击电流扩散过程的数值模拟结果表明,与土壤的时间常数(介电常数与电导率的乘积)有关,存在一个最优参数比,在该参数比下,雷电电流的高频振荡幅度最小。
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引用次数: 0
The disturbance of high-voltage apparatus thermal fields and ways of its diagnostics 高压仪器热场扰动及其诊断方法
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269268
M. Sukhichev, V. Titkov, P. Tukeev, A. Bekbayev, Y. Sarsenbayev
In this study features and factors important for thermal fields of several high-voltage electrical apparatus elements, such as high-voltage transformer input, polymer surge arrestor, bus contact and high-voltage power cable, have been considered. Stationary thermal field disturbances, caused by defects, have been studied, and possibility of their detection via monitoring data from infrared, contact and optical temperature sensors have been assumed. The features of non-stationary thermal field disturbances, taking place under pulse currents in bus connections and surge arrestors, have been analyzed, thus allowing to get information about device defects.
本文研究了高压变压器输入端、聚合物避雷器、母线触点和高压电力电缆等几种高压电器元件的热场特征和影响因素。研究了由缺陷引起的稳态热场扰动,并假设了通过红外、接触式和光学温度传感器监测数据检测缺陷的可能性。分析了在脉冲电流下母线连接和避雷器中发生的非稳态热场扰动的特征,从而可以获得有关器件缺陷的信息。
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引用次数: 1
Experimental and simulated data at fragment productions in 100 MeV proton-induced reaction on 232Th 232Th上100 MeV质子诱导反应产生碎片的实验和模拟数据
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269277
R. Holomb, K. Katovský, I. Haysak, J. Adam, R. Vespalec, J. Vrzalová, M. Zeman, V. Brudanin, L. Zavorka, D. Karaivanov, A. Solnyshkin, D. Filosofov, J. Khushvaktov, V. Tsupko-Sitnikov
This paper shows the results from the experiment that was done in JINR (Joint Institute for Nuclear Research) Dubna. Thorium foil between two aluminum foils was irradiated inside Phasotron with 100 MeV protons. As a result - gamma spectra was obtained from the Th and aluminum foils and residual nuclei cross-sections were evaluated from the reaction. Also there was made a simulation analysis of the beam distribution inside the Th foil and particle escape from the target. The experimental cross-sections were compared with calculations made in Monte-Carlo simulation (MCNP 6.1).
本文介绍了在杜布纳联合核研究所进行的实验结果。用100兆电子伏特的质子辐照两个铝箔之间的钍箔。结果得到了钍和铝箔的γ谱,并对反应的残核截面进行了评价。模拟分析了金属箔内部的光束分布和粒子的逸出情况。将实验截面与蒙特卡罗模拟(MCNP 6.1)计算结果进行比较。
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引用次数: 0
XS data preparation for 3D full core calculations 3D全岩心计算XS数据准备
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269255
Pavel Suk, J. Frybort
Nuclear safety is the essential aspect of the nuclear power plant operation. The safety is based on the well prepared fuel loading pattern that is created with using 3D full core calculations. The calculations are conducted with the simplified geometry and simplified neutron transport solvers (called macrocodes) in industry based process. The simplified calculation approach is efficient with reduced calculation costs, however the specific library of the macroscopic cross-sections have to be prepared. The library is calculated using deterministic or stochastic lattice codes. The macroscopic cross-sections are affected by the calculation approach, moreover they provide connections of the mathematical solution with the physic meaning. The macroscopic cross-sections are compared in the paper. The main problem of the deterministic calculation codes is self-shielding simulation. The presented approach shows relatively good results consistency with the stochastic code. Otherwise, the XS are affected by the self-shielding methodology in higher scale than the multiplication factor. The XS calculated via different code represents reasonably good compliance, however the transport XS is highly affected by the approach (up to 30 %) or code used for data preparation process (up to 50%).
核安全是核电厂运行的重要方面。安全性是基于使用3D全堆芯计算创建的精心准备的燃料装载模式。在工业过程中使用简化的几何图形和简化的中子输运求解器(称为宏码)进行计算。简化计算方法效率高,计算成本低,但需要编制宏观截面的具体库。该库是使用确定性或随机格码计算的。宏观截面不仅受计算方法的影响,而且提供了数学解与物理意义的联系。本文对宏观截面进行了比较。确定性计算码的主要问题是自屏蔽仿真。该方法与随机码具有较好的一致性。否则,XS在比倍增因子更高的尺度上受到自屏蔽方法学的影响。通过不同代码计算的XS代表了相当好的遵从性,但是传输XS受到方法(高达30%)或用于数据准备过程的代码(高达50%)的高度影响。
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引用次数: 0
Concept of Real-Time Communication in Off-Grid System with Vehicle-to-Home Technology 基于车到家技术的离网系统实时通信概念
Pub Date : 2020-10-19 DOI: 10.1109/EPE51172.2020.9269236
Vojtech Blazek, Michal Petruzela, Jan Vysocký, L. Prokop, Stanisav Misak, D. Seidl
In this paper are proposed two ways of communication in the Off-Grid system, PowerLine communication (PLC) and wireless. Four concepts are created by combining ordinary or smart appliance and PLC or Wireless communication. Reliable communication is necessary for proper operation of the Off-Grid control system based on demand response. It is important for control system to know what appliances are connected and running and for an appliance is important to know whether it is allowed to start operation. At first, the Off-Grid and its control system is described, then several parameters of the communication network created by PLC in the Off-Grid system are tested and analysed. During testing, different appliances are connected to the Off-Grid to identify their impact on these parameters.
本文提出了离网系统的两种通信方式:电力线通信(PLC)和无线通信。通过将普通或智能家电与PLC或无线通信相结合,产生了四个概念。可靠的通信是基于需求响应的离网控制系统正常运行的必要条件。对于控制系统来说,重要的是要知道哪些设备连接并运行,对于一个设备来说,重要的是要知道它是否被允许开始运行。首先介绍了离网及其控制系统,然后对PLC在离网系统中建立的通信网络的几个参数进行了测试和分析。在测试期间,将不同的设备连接到离网设备,以确定它们对这些参数的影响。
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引用次数: 8
期刊
2020 21st International Scientific Conference on Electric Power Engineering (EPE)
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