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2020 IEEE International Conference on Power and Energy (PECon)最新文献

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Transformer Ageing Investigation and Correlation of Furanic Compound and Degree of Polymerization for Power Transformer Life Assessment 变压器老化研究及电力变压器寿命评估中呋喃化合物与聚合度的相关性
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314543
M. Talib, M. Aziz, Yogendra Balasubramaniam, Y. Z. Y. Ghazali, M. R. Z. Abidin, M. Yousof
Furans are one of the ageing by-products produced and partially dissolved in transformer oil as a result of degradation of insulation paper in power transformer. The analysis of furanic compound thus widely used as a diagnostic tool to assess the health state of transformer paper insulation system. The correlation of furans data and the degree of polymerization (DP) has been previously studied to establish the end life criteria of in-service power transformer. This paper presented the post mortem ageing investigation on insulation material of power transformer. The DP profile of the axial and radial direction of transformer winding was presented. In addition, the correlation of 2FAL concentration and the average DP value of the transformer were compared with the existing established empirical equations correlations.
呋喃是电力变压器绝缘纸降解产生并部分溶解在变压器油中的老化副产物之一。因此,呋喃化合物的分析作为一种诊断变压器绝缘系统健康状况的工具被广泛应用。呋喃数据与聚合度(DP)的相关性已被研究,以建立在用电力变压器的终寿命标准。本文介绍了电力变压器绝缘材料的事后老化研究。给出了变压器绕组轴向和径向的DP曲线。此外,将2FAL浓度与变压器平均DP值的相关性与已有的经验方程相关性进行了比较。
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引用次数: 2
Sectionalization of Degraded Polymeric Cable with Multiple Joints using TDR Technique 基于TDR技术的多接头降解聚合物电缆分段
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314302
T. M. Kuan, A. M. Ariffin, W. Raymond
This paper presents the study on time domain reflectometry (TDR) technique in sectionalizing degraded cable along a polymeric insulated cable with multiple joints. TDR has been widely used for fault localization in polymeric cables. However, it only gives an average condition of the cable and could not pinpoint the degraded section along a cable especially for cable with jointing. Hence, this paper investigates the ability of TDR technique to pinpoint degraded cable section for an XLPE cable with two joints. The TDR system is modelled in MATLAB with a 300-metre XLPE cable that is divided into three equal lengths of 100 m and joint together using two cable joints. The location of degraded cable section is varied to study the ability of TDR in detecting degraded cable at various locations. Simulation results are then validated experimentally with the same cable configurations. Findings from validation of results show that TDR is capable of pinpointing the degraded cable section which allow sectionalization to take place for cable replacement.
本文研究了时域反射法(TDR)在多接头聚合物绝缘电缆分段中的应用。TDR已广泛应用于聚合物电缆的故障定位。但是,它只能给出电缆的平均状态,不能精确定位电缆沿电缆的退化截面,特别是对于有接头的电缆。因此,本文研究了TDR技术对双接头交联聚乙烯电缆退化截面的精确定位能力。TDR系统在MATLAB中使用300米XLPE电缆进行建模,该电缆被分成三个等长的100米,并使用两个电缆接头连接在一起。通过改变退化电缆段的位置,研究TDR在不同位置检测退化电缆的能力。然后用相同的电缆结构对仿真结果进行了实验验证。结果验证的结果表明,TDR能够精确定位退化的电缆部分,从而允许进行电缆更换的分段。
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引用次数: 0
Fault Signature Analysis for Medium Voltage Overhead Line Based on New Characteristic Indices 基于新特征指标的中压架空线路故障特征分析
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314486
S. H. Asman, N. F. Ab Aziz, Mohd Zainal Abidin Abd Kadir, U. Amirulddin
Medium voltage overhead line is exposed to fault due to the system spanning across a huge geographical area. The faults can lead to power outages and become a concern for power utilities. The outages can be due to various causes such as lightning strike, animal encroachment, and equipment failure. In some cases, the lightning strike might not affect the system as it self-clears and is represented as a lightning strike without fault. While, in other cases, a lightning strike with fault might present itself, thus, reducing the electrical performance. The impact of outages can be reduced if power utility operators utilize appropriate tools to analyze the fault signature. Several characteristic indices can be extracted from the signal waveform collected from Digital Fault Recorders (DFR) for practical applications. This paper presents fault signature analysis based on voltage and current parameters from the databases of overhead line system. Fault duration based on wavelet transform, rise time, decay time, and rate of change of neutral current are presented. The signature of lightning without fault, lightning with fault, and animal encroachment are established based on extracted characteristics.
中压架空线路由于横跨广大的地理区域而容易发生故障。这些故障可能导致电力中断,成为电力公司关注的问题。停电可能是由于各种原因造成的,如雷击、动物入侵和设备故障。在某些情况下,雷击可能不会影响系统,因为它会自动清除,并表示为无故障雷击。而在其他情况下,可能会出现雷击故障,从而降低电气性能。如果电力运营商利用适当的工具来分析故障特征,可以减少停电的影响。从数字故障记录仪(DFR)采集的信号波形中可以提取出多个特征指标,用于实际应用。本文提出了基于架空线系统数据库中电压和电流参数的故障特征分析方法。给出了基于小波变换的故障持续时间、上升时间、衰减时间和中性点电流变化率。根据提取的特征建立无断层闪电、有断层闪电和动物入侵的特征。
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引用次数: 2
Controllable Electric Vehicle Fast Charging Approach Based on Multi-Stage Charging Current Methodology 基于多级充电电流法的可控电动汽车快速充电方法
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314471
P. Makeen, H. Ghali, S. Memon
This paper expresses a developed Electric Vehicle (EV) fast-charging control system based on multi-stage charging current methodology. The controller does not require a current sensor or any compensation circuit as in the current mode control (CMC) and the voltage mode control (VMC). The proposed controller drives the EV charging current to a predetermined value throughout an enhancement in the closed-loop feedback controller based on the duty cycle. A required duty cycle is anticipated through the design and analysis of the switched-mode DC-DC parasitic buck-boost converter supplied from Renewable Energy Sources (RESs) and has been represented as a variable DC supply. In this paper, the validity of the proposed controller has been studied by three main scenarios using the MATLAB/Simulink computer program. The scenarios proved the fast speed response and accuracy of the investigated controller.
介绍了一种基于多级充电电流法的电动汽车快速充电控制系统。控制器不需要电流传感器或任何补偿电路,如在电流模式控制(CMC)和电压模式控制(VMC)。该控制器通过基于占空比的闭环反馈控制器的增强,将电动汽车充电电流驱动到预定值。通过可再生能源(RESs)提供的开关模式DC-DC寄生降压-升压转换器的设计和分析,预测了所需的占空比,并将其表示为可变直流电源。本文利用MATLAB/Simulink计算机程序,通过三种主要场景对所提控制器的有效性进行了研究。仿真结果表明,所研究的控制器响应速度快,精度高。
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引用次数: 9
Design and Analysis of Five-level cascaded LLC Resonant Converter 五电平级联LLC谐振变换器的设计与分析
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314463
Salah Alatai, Mohamed Salem, D. Ishak, M. Kamarol, M. Jamil, Ali Bughneda
The design and analysis of a five-level cascaded LLC resonant tank converter was presented in this study. The proposed converter steps-down the voltage, and the construction of the designed converter and the tank selected parameters forces the input impedance of the resonant tank to behave as a capacitor. Besides, the lack of any transformer in this design is beneficial in terms of cost reduction and the number of elements. The performance of the proposed converter was evaluated in a MATLAB-SIMULINK platform and based on the outcome of testing three different switching frequencies and measuring the ZCS for all switches, there was an agreement between the simulation and theoretical findings. Hence, the results conformed the ability of the proposed converter to provide a wide range of load operation (0.8 ≤ Fn ≥ 1.6) with input voltage of almost 400V and output voltage of 48V.
本文介绍了一种五电平级联LLC谐振槽式变换器的设计与分析。所提出的变换器降压电压,所设计的变换器的结构和槽的选择参数迫使谐振槽的输入阻抗表现为电容器的行为。此外,在本设计中没有任何变压器,有利于降低成本和元件的数量。在MATLAB-SIMULINK平台上对所提出的转换器的性能进行了评估,并基于测试三种不同开关频率和测量所有开关的ZCS的结果,仿真结果与理论结果一致。因此,结果表明该变换器能够在输入电压几乎为400V,输出电压为48V的情况下提供大范围的负载工作(0.8≤Fn≥1.6)。
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引用次数: 6
An Intelligent Classification Method of Series Arc Fault Models Using Deep Learning Algorithm 基于深度学习算法的串联电弧故障模型智能分类方法
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314520
A. Omran, Dalila Mat Said, S. M. Hussin, S. Mirsaeidi, Yaser M. Abid
In recent years, machine learning techniques have been widely used to solve many problems for fault diagnosis. A significant number of electrical connectors have been utilized in photovoltaic systems in the presence of parallel and serial modules structures, where many various faults can take place. One of these faults, known as a series arc fault that frequently happens in the PV system. Many series arc fault generator models are derived from studying this type of fault. In this paper, a new intelligent method is proposed to classify various models of series arc fault generator. Different types of series arc fault models have been simulated to generated more than 800 records. The intelligent classification method has been proposed using Python to precisely discriminate among different models structured in a way that simplifies deep feature learning, where a light convolution neural network has been used; the proposed method achieved a high accuracy 98%.
近年来,机器学习技术被广泛应用于解决许多故障诊断问题。大量的电连接器已被用于光伏系统中存在的并联和串行模块结构,其中许多不同的故障可能发生。其中一种故障被称为串联电弧故障,在光伏系统中经常发生。通过对这类故障的研究,得到了许多串联电弧故障发生器模型。本文提出了一种新的智能方法对各种型号的串联电弧故障发生器进行分类。对不同类型的串联电弧断层模型进行了模拟,生成了800多条记录。智能分类方法已经提出使用Python来精确区分以简化深度特征学习的方式构建的不同模型,其中使用了光卷积神经网络;该方法的准确率高达98%。
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引用次数: 10
Exploring the Application of Phasor Measurement Units in the Distribution Network 探讨相量测量单元在配电网中的应用
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314622
Y. Yeung, C. Lau
Phasor Measurement Units or PMU is a measurement device that produces synchronised measurement of phasor, frequency and rate of change of frequency from voltage and/or current signals based on a common time source that typically is the one provided by the Global Positioning System UTC-GPS [1]. It enables operators to monitor the network operating status in real time so as to take corresponding actions promptly and effectively while the network can be properly protected and supply can be restored automatically when fault incidents happen. PMU system can also provide the dedicated information to enhance the system protection scheme, supply reliability and asset utilisation so that the operators can operate the network smartly. This paper discusses system architecture design on the appropriate PMU technology for CLP Power’s system, acquisition, installation, operation and performance evaluation of the PMU system in CLP Power’s distribution network.
相量测量单元(Phasor Measurement Units,简称PMU)是一种测量装置,它基于一个共同的时间源(通常是全球定位系统UTC-GPS提供的时间源),从电压和/或电流信号中产生相量、频率和频率变化率的同步测量。[1]使运营商能够实时监控网络运行状态,及时有效地采取相应措施,在发生故障事故时,对网络进行适当的保护,并自动恢复供电。PMU系统还可以提供专用信息,以增强系统保护方案,供应可靠性和资产利用率,以便运营商可以智能地操作网络。本文讨论了适合中电系统的PMU技术的系统架构设计,以及中电配电网PMU系统的获取、安装、运行和性能评估。
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引用次数: 1
Buck Converter Design for Photovoltaic Emulator Application 用于光伏仿真器的Buck变换器设计
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314582
R. Ayop, Chee Wei Tan, S. N. Syed Nasir, K. Y. Lau, Chuen Ling Toh
Photovoltaic (PV) emulator (PVE) allows the development and testing of the PV equipment and system effectively. The PVE is an alternative to controllable light source that requires a large space and highly inefficient. The PVE requires a power converter and the buck converter is preferred due to the control simplicity and high efficiency. Nonetheless, the conventional design of the buck converter cannot be used since the output voltage of the PVE highly dependent on the output resistance. A proper design of the buck converter specified for the PVE application is needed to maintain continuous current mode operation and the output voltage ripple factor below the desired specification. This paper proposed the design for the passive components for the PVE using buck converter, which includes the output resistor, inductor, and capacitor. The single diode model is used to produce the current-resistance characteristic curves of the PV. The control strategy of the PVE is not included in this paper. The results show that the passive components for the buck converter obtained from the derivation able to maintain continuous current mode and has the output voltage ripple factor lower than the desired specification when operates as the PVE. This proves the derivation of the passive components is accurate.
光伏仿真器(PV simulator, PVE)可以有效地对光伏设备和系统进行开发和测试。PVE是一种替代可控光源的方法,需要很大的空间,效率很低。PVE需要一个功率转换器,由于控制简单,效率高,首选降压转换器。尽管如此,由于PVE的输出电压高度依赖于输出电阻,因此不能使用传统的降压转换器设计。需要为PVE应用指定适当的降压转换器设计,以保持连续电流模式工作,并使输出电压纹波系数低于所需的规格。提出了基于降压变换器的PVE无源器件的设计方案,包括输出电阻、电感和电容。采用单二极管模型得到了PV的电流-电阻特性曲线。本文不包括PVE的控制策略。结果表明,推导得到的buck变换器无源元件在作为PVE工作时能够保持连续电流模式,且输出电压纹波因数低于期望规格。这证明无源分量的推导是准确的。
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引用次数: 3
PECon 2020 Copyright Page PECon 2020版权页面
Pub Date : 2020-12-07 DOI: 10.1109/pecon48942.2020.9314452
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引用次数: 0
Techno-Economics of Solar PV Systems on the Commercial Malls Rooftops 商业商场屋顶太阳能光伏系统的技术经济学
Pub Date : 2020-12-07 DOI: 10.1109/PECon48942.2020.9314427
Meshal M. Al-Shammari, E. Al-Ammar
In this paper, the feasibility of installing the PV systems on the rooftop of the shopping centers is investigated. Several case studies are proposed to cover a range of the rooftop area. Each case study contains two main options which include considering the load of the shopping center and exclude the load. The first case study aims to install a 2 MWp PV system according to the Saudi Arabia renewable energy regulation. The 2 MWp PV system is installed to be connected to the low voltage side. In this case study, the needed area to install the 2 MWp is 10,932 m2 which is less than the minimum range of the available area of the shopping mall (60,000 m2). The second case study aims to install the PV system to cover around 75% of the rooftop (60,000 m2). In addition, the feasible area to install the PV systems in the rooftop of the shopping centers are also investigated. Here, the area is found to be more than 8,430.8 m2 in case of the cost of the kWh is 0.07 SAR.
本文研究了在购物中心屋顶安装光伏系统的可行性。提出了几个案例研究,以涵盖一系列的屋顶区域。每个案例研究包含两个主要选项,包括考虑购物中心的负荷和排除负荷。第一个案例研究的目标是根据沙特阿拉伯可再生能源法规安装一个2兆瓦的光伏系统。安装2mwp光伏系统,连接到低压侧。在本案例中,安装2mwp所需的面积为10,932 m2,小于商场可用面积的最小范围(60,000 m2)。第二个案例研究旨在安装光伏系统,覆盖约75%的屋顶(60,000平方米)。此外,还对购物中心屋顶安装光伏系统的可行面积进行了研究。在这里,在千瓦时成本为0.07 SAR的情况下,发现面积超过8,430.8 m2。
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引用次数: 0
期刊
2020 IEEE International Conference on Power and Energy (PECon)
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