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2023 8th International Engineering Conference on Renewable Energy & Sustainability (ieCRES)最新文献

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Grid Load Balancing Using Phase Adapter Via Fuzzy Logic 基于模糊逻辑的相位适配器电网负载均衡
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209543
H. Elaydi, Obada Alqaramani
Balancing the load in the distribution networks is one of the basic needs to ensure the operation of power systems without additional energy load. Unbalance load on low voltage side distribution transformer is one of the problems in the electrical distribution systems due to several nonlinearities. The cause of the nonlinearities can be attributed to: the nature of subscribers’ power demand, the instantaneous changes in the electricity usage at homes daily and seasonally which varies based on the outside temperature. This can lead to a non-zero neutral current and technical and commercial losses. Nonzero neutral also called return current refers to the flowing of unbalanced three phase currents that produces unbalanced voltage drops in the electric feeders (technical losses). These losses lead to money losses for electrical distribution companies. This energy was supposed to be sold to subscribers, but it was lost to the feeder lines. In this research, a fuzzy logic was utilized to design a load balancing controller using MATLAB. ETAP program was also used to make load flow analysis. The designed fuzzy controller was able to reduce the losses by 3.5%.
配电网负荷均衡是保证电力系统无附加负荷运行的基本要求之一。低压侧配电变压器的不平衡负荷是配电系统中常见的非线性问题之一。非线性的原因可以归结为:用户电力需求的性质,每日和季节性家庭用电量的瞬时变化,这取决于外部温度的变化。这可能导致非零中性电流和技术和商业损失。非零中性点又称回流,是指在馈线中产生不平衡电压降的不平衡三相电流的流动(技术损耗)。这些损失给配电公司带来了经济损失。这些电能本应卖给用户,但却被输电线输掉了。在本研究中,利用模糊逻辑在MATLAB中设计了一个负载均衡控制器。采用ETAP程序进行潮流分析。所设计的模糊控制器能使损耗降低3.5%。
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引用次数: 0
Fabrication and Characterization of CdS Quantum Dot-Sensitized Solar Cell Based on TiO2 Film by Successive Ionic Layer Adsorption and Reaction (SILAR) Technique 基于TiO2薄膜的连续离子层吸附反应(SILAR)技术制备CdS量子点敏化太阳能电池及表征
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209431
H. Musleh, S. Shaat, N. Dahoudi, J. Asad, Samy Mansy
The most affordable alternatives to traditional silicon solar cells are quantum dot-sensitized solar cells. II-VI semiconductors compound have been widely used as Quantum Dot absorbers. Thin film of TiO2 blocking layer was deposited onto FTO layer to prevent recombination of charges to achieve higher efficiency. A TiO2 nanostructure-based cadmium sulfide quantum dot sensitive solar cell has been created. TiO2 films degrade utilizing the SILAR method (Successive Ionic Layer Adsorption and Reaction). Enhancement the electrical conduction and reducing the recombination of charges between layer is a very strong tool for the characterization of photovoltaic devices. TiO2 films were immersed into 0. 05M KC1 solution at 70 0C for different time. Efficiency was experimentally tested using current-voltage (I-V) in order to extract fabricated device properties. Solar cells with cadmium sulfide quantum dots are demonstrating a performance of 1.5-1.82%. Under AM1.5 illumination, a short circuit current density of 5.922 mA/c$mathrm{m}^{2}$ and an open circuit voltage of around 0.613 V were attained.
量子点敏化太阳能电池是传统硅太阳能电池最实惠的替代品。II-VI半导体化合物作为量子点吸收剂已被广泛应用。在FTO层上沉积TiO2阻断层薄膜,防止电荷的复合,从而提高效率。制备了一种基于TiO2纳米结构的硫化镉量子点敏感太阳能电池。利用SILAR(连续离子层吸附和反应)方法降解TiO2薄膜。增强电传导和减少层间电荷的复合是表征光伏器件的一个非常有力的工具。将TiO2薄膜浸入0。05M KC1溶液在70℃下不同时间。利用电流-电压(I-V)对效率进行了实验测试,以提取制备的器件性能。硫化镉量子点太阳能电池的性能为1.5-1.82%。在AM1.5照度下,短路电流密度为5.922 mA/c$ mathm {m}^{2}$,开路电压约为0.613 V。
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引用次数: 0
Thermoelectrical Analysis of a New Hybrid PV-Thermal Flat Plate Solar Collector 一种新型混合光伏-热平板太阳能集热器的热电分析
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209472
Y. Nassar, Khalid A. Amer, H. El-khozondar, A. Ahmed, Abdulgader Alsharif, M. Khaleel, M. Elnaggar, R. El-Khozondar, A. Salem
A practical design presented in this paper; a hybrid PV solar panel and flat plate solar air heating collector (HSC). When the PV solar cells are installed on the upper surface of the absorber plate at the entrance of air duct of the air heater solar collector, the system will generate both electricity and heat. Numerical model based on energy balance of a PV solar/thermal flat plate air heater solar collector (PV/T) has been developed. The analysis is aiming to identify the optimum contribution of the PV in the proposed HSC according to local transient energy behavior of the components of the HSC. The results substantiated the success of HSC technology in reducing the surface temperature of solar cells and increasing their productivity compared to a conventional PV solar panel. The optimum ratio of PV solar cell is found 25% of the total length of the HSC. Although the proposed HSC reduced the thermal efficiency of the solar collector from 42% to 39%, it increased the electrical efficiency of the PV solar cells from 11% to 14%. As a result, the overall efficiency of the proposed HSC was raised to 53%.
本文给出了一个实用的设计方案;混合光伏太阳能电池板和平板太阳能空气加热集热器(HSC)。当将光伏太阳能电池安装在空气加热器太阳能集热器风道入口吸收板的上表面时,系统既发电又发热。建立了基于光伏太阳能/热平板空气加热器太阳能集热器(PV/T)能量平衡的数值模型。分析的目的是根据局部瞬态能量行为确定光伏在HSC中的最佳贡献。结果证实了HSC技术在降低太阳能电池表面温度和提高其生产力方面的成功,与传统的光伏太阳能电池板相比。PV太阳能电池的最佳比例为HSC总长度的25%。虽然提议的HSC将太阳能集热器的热效率从42%降低到39%,但它将光伏太阳能电池的电效率从11%提高到14%。因此,拟议的HSC的整体效率提高到53%。
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引用次数: 1
Accelerating the Run-Time of Convolutional Neural Networks through Weight Pruning and Quantization 通过权值修剪和量化加速卷积神经网络的运行时间
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209460
Rajai Alhimdiat, W. Ashour, Ramy Battrawy, D. Stricker
Accelerating the processing of Convolutional Neural Networks (CNNs) is highly demand in the field of Artificial Intelligence (AI), particularly in computer vision domains. The efficiency of memory resources is crucial in measuring run-time, and weight pruning and quantization techniques have been studied extensively to optimize this efficiency. In this work, we investigate the contribution of these techniques to accelerate a pre-trained CNN model. We adapt the percentile-based weights pruning with focusing on unstructured pruning by dynamically adjusting the pruning thresholds based on the fine-tuning performance of the model. In the same context, we perform uniform quantization for presenting the weights values of the model’s parameters with a fixed number of bits. We implement different levels of post-training and aware-training -fine-tuning the model with the same learning rate and number of epochs as the original. We then refine-tune the model with a lower learning rate and a factor of 10x for both techniques. Finally, we combine the best levels of pruning and quantization and refine-tune the model to explore the best-pruned and quantized pre-trained model. We evaluate each level of the techniques and analyze their trade-offs. Our results demonstrate the effectiveness of our strategy in accelerating the CNN and improving its efficiency, and provide insights into the best combination of techniques to accelerate its inference time.
加速卷积神经网络(cnn)的处理在人工智能(AI)领域,特别是在计算机视觉领域有着很高的需求。内存资源的效率是衡量运行时间的关键,为了优化内存资源的效率,人们广泛研究了权值修剪和量化技术。在这项工作中,我们研究了这些技术对加速预训练CNN模型的贡献。我们根据模型的微调性能动态调整剪枝阈值,对基于百分位的权值剪枝进行改进,重点关注非结构化剪枝。在相同的上下文中,我们执行统一量化,以固定位数表示模型参数的权重值。我们在与原始模型相同的学习率和epoch数下,实现了不同级别的后训练和意识训练微调模型。然后,我们用较低的学习率和两种技术的10倍因子来优化模型。最后,我们将最佳修剪和量化水平结合起来,对模型进行微调,以探索最佳修剪和量化的预训练模型。我们评估每个级别的技术,并分析它们的权衡。我们的结果证明了我们的策略在加速CNN和提高其效率方面的有效性,并为加速其推理时间的最佳技术组合提供了见解。
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引用次数: 0
Assessment of the THD Problem in the Southern Governorates Desalination Plant 南部省海水淡化厂THD问题的评估
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209474
Mohamed Abdelati, Nasreddin Elmezaini
The problem of the Total Harmonic Distortion (THD) in the Southern Governorates RO Desalination Plant was first raised when the newly installed PV solar system inverters did not successfully integrate with the plant while being on the backup generators mode. The PV system contractor, reported that the THD levels in the plant are higher than the acceptable standard level. He suggested installing external filters on the Variable Frequency Drive (VFD) devices to reduce the THD levels in the plant network. The main contractor submitted a Variation Order of over 500,000 EUR for installing external filters for both phase-1 and phase-2 production lines of the plant. The aim of this work is to conduct power analyses of the plant and carry a comprehensive survey to identify the THD levels of the existing phase-1 plant under all different running scenarios, diagnose the problem and to identify suitable solutions.
当新安装的光伏太阳能系统逆变器在备用发电机模式下未能成功与工厂集成时,南部省RO海水淡化厂的总谐波失真(THD)问题首次被提出。光伏系统承建商报告厂房内的THD水平高于可接受的标准水平。他建议在变频器(VFD)设备上安装外部过滤器,以降低工厂网络中的THD水平。主承包商提交了一份超过50万欧元的变更订单,用于为工厂的第一阶段和第二阶段生产线安装外部过滤器。这项工作的目的是对电厂进行功率分析,并进行全面调查,以确定现有第一阶段电厂在所有不同运行情况下的THD水平,诊断问题并确定合适的解决方案。
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引用次数: 0
Simulation of Nanoparticles Perovskite Solar Cells 纳米钙钛矿太阳能电池的模拟
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209450
H. El-khozondar, M. M. Shabat
In this work, we present a three-layers solar cell (PV) which consists of perovskite film surrounded by nanocomposite layer and SnO2. The Nanocomposite material is NiOx embedded in air with refractive index depends on the distance from the film (graded change). The absorbance spectrum is calculated using transverse matrix methods (TMM) and solved numerically using Maple. Results show that the proposed PV gives a high absorbance around 600nm which its peak depends on the thicknesses of both the nanocomposite and perovskite layers. Thus, it is recommended for potential PV fabrication.
在这项工作中,我们提出了一种三层太阳能电池(PV),由钙钛矿薄膜和纳米复合层和SnO2包围组成。纳米复合材料是嵌入空气中的氧化镍,其折射率取决于与薄膜的距离(梯度变化)。吸收光谱采用横向矩阵法(TMM)计算,用Maple进行数值求解。结果表明,所制备的PV在600nm附近具有较高的吸光度,其峰值取决于纳米复合材料和钙钛矿层的厚度。因此,它被推荐用于潜在的PV制造。
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引用次数: 0
Assessment of the Impact of Climate Change on Rainfall Patterns in the Gaza Strip 评估气候变化对加沙地带降雨模式的影响
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209477
Imadeddin Alghariz, Y. Mogheir
Ecosystems, infrastructure, and society at all scales feel the effects of climate change and extreme climate events that have been documented all over the world. This research looked at daily precipitation data from eight meteorological stations in the Gaza Strip for a total of 49 years (1973-2021) to determine if there had been any significant changes in the spatial and temporal events of extreme precipitation. Eleven Extreme Precipitation Indices (EPIs) were developed by the Expert Team on Climate Change Detection and Indices (ETCCDI) to characterize the intensity, frequency, and duration of daily rainfall, and these are used to describe the extreme precipitation events. The eleven EPIs had their values estimated using RClimDex software, and their trends were analyzed using the Mann-Kendall test by RStudio software. All indices (with the exception of Consecutive Dry Days (CDD) index) showed rising trends. Just Consecutive Wet Days (CWD) index passed on average the significance test, and passed the significance test in 50% of meteorological stations in the Gaza Strip. The increase in CWD index suggests a potential rise in the length of the rainy season, the increase in water quantities, the mitigation of the demand for water resources, and the mitigation of pressure on the aquifer of the Gaza Strip. Five of these indices passed the significance test in one meteorological station, it includes: Total wet-day precipitation (PRCPTOT), Max1-day precipitation (RX1day), Max5-day precipitation (RX5day), Very wet-day precipitation (R95p) and Number of wet days (R1mm). These indices beside Extremely wet-day precipitation (R99P), Number of heavy precipitation days (R10mm) and number of very heavy precipitation days (R20mm) describe the magnitude in intensity and frequency of extreme precipitation occurrences, and the upward trend of these indices in all meteorological stations suggests the possibility of the potential of flooding, soil erosion and landslides in the Gaza Strip. This study found a declining trend in the CDD index, a measure of drought. A shorter summer (drought) season may be in the horizon for the Gaza Strip if CDD continues to fall as predicted. Vegetation loss may result from a combination of lower CDD, higher CWD, and higher PRCPTOT. Despite being separated by only a few kilometers, some meteorological stations in the Gaza Strip showed contrasting trends, especially in R1mm and CDD indices. Further, at the 99% confidence level, all EPIs (with the exception of the CDD index) have positive correlations with PRCPTOT. On the other hand, CDD has negative correlation with all EPIs).
所有尺度的生态系统、基础设施和社会都感受到了气候变化和极端气候事件的影响,这些事件在世界各地都有记录。本研究分析了加沙地带8个气象站共49年(1973-2021年)的日降水数据,以确定极端降水的时空事件是否有任何重大变化。气候变化探测与指数专家组(ETCCDI)编制了11个极端降水指数(EPIs),用于描述日降水的强度、频率和持续时间,并使用这些指数来描述极端降水事件。采用RClimDex软件对11个EPIs进行数值估计,并采用RStudio软件对其趋势进行Mann-Kendall检验。除连续干旱日指数外,其余指数均呈上升趋势。仅连续雨天(CWD)指数平均通过显著性检验,在加沙地带50%的气象站通过显著性检验。水资源消耗指数的增加表明雨季可能延长,水量增加,对水资源的需求减少,加沙地带含水层的压力减轻。其中5个指标在同一气象站通过显著性检验,分别是总湿日降水量(PRCPTOT)、最大1日降水量(RX1day)、最大5日降水量(RX5day)、极湿日降水量(R95p)和湿日数(R1mm)。这些指数与极端湿日数(R99P)、强降水日数(R10mm)和甚强降水日数(R20mm)一起描述了极端降水发生的强度和频率,这些指数在所有气象站都呈上升趋势,表明加沙地带可能发生洪水、土壤侵蚀和山体滑坡。这项研究发现,衡量干旱程度的CDD指数呈下降趋势。如果CDD继续像预测的那样下降,加沙地带的夏季(干旱)季节可能会缩短。植被损失可能是低CDD、高CWD和高PRCPTOT共同作用的结果。尽管相距只有几公里,加沙地带的一些气象站却显示出截然不同的趋势,特别是在毫米和毫米温差指数方面。此外,在99%的置信水平下,所有epi (CDD指数除外)都与PRCPTOT呈正相关。另一方面,CDD与所有epi呈负相关)。
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引用次数: 0
Performance Evaluation of PID and MPC for Anaylsis of Vehicle Handling 车辆操纵分析中PID和MPC的性能评价
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209529
Mustafa Emheisen, A. Ahmed, Triwiyanto Triwiyanto, Y. Nassar
The automotive single-track model has been employed in this study to provide a more basic modelling and simulating for observing vehicle performance behavior and stability. The conventional controller (PID) and model predictive control (MPC) are the two control technologies employed in this paper. A complete control module that consists of an automotive linear single system, a single-track nonlinear model, and a control strategy must be established in order to achieve the goals of this research. Step steer angle and lane - changing maneuver are the settings for the steering input. The simulation findings in this research demonstrate that superior handling and stability of the vehicle were successfully attained using the control systems built for the vehicle models employed.
本研究采用汽车单轨模型,为观察车辆性能行为和稳定性提供更基本的建模和仿真。本文采用了传统的PID控制和模型预测控制两种控制技术。为了实现本研究的目标,必须建立一个由汽车线性单系统、单轨迹非线性模型和控制策略组成的完整控制模块。阶跃转向角度和变道机动是转向输入的设置。仿真结果表明,所建立的控制系统成功地实现了车辆良好的操控性和稳定性。
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引用次数: 0
Multi-Objective Optimal Allocation of Hybrid Electric Vehicles Charging Stations and Renewable Distributed Generators into the Distribution System 混合动力汽车充电站和可再生分布式发电机在配电系统中的多目标优化配置
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209489
M. Zellagui, Samir Settoul, N. Belbachir
Electric vehicle charging stations (EVCS) and renewable distributed generators (RDG) units are very exciting topics that have been implemented and used to enhance the efficiency of the energy of the electrical distribution system (EDS) when it comes to their optimal integration. This paper proposed the use of the marine predators algorithm (MPA) for multi-objective optimal allocation of hybrid EVCS and RDG based on wind and solar power generation in EDS. The novel multi-objective functions proposed for minimizing the active power loss (APL), voltage stability index (VSI), fast voltage stability index (FVSI), line stability factor (LPQ), and power-voltage stability index (PVSI). The capability of the MPA approach is tested for the IEEE 69-bus and compared with other competitive optimization approaches. The simulation results obviously showed the efficiency, feasibility and superiority of the applied MPA algorithm, while respecting the other relevant techniques for optimum solutions for simultaneous hybrid EVCS and RDG unit allocation.
电动汽车充电站(EVCS)和可再生分布式发电机(RDG)单元是非常令人兴奋的话题,它们已经被实施并用于提高配电系统(EDS)的能量效率,当涉及到它们的最佳集成时。提出了利用海洋掠食者算法(MPA)对EDS中基于风能和太阳能发电的混合EVCS和RDG进行多目标优化配置。提出了最小化有功功率损耗(APL)、电压稳定指数(VSI)、快速电压稳定指数(FVSI)、线路稳定因子(LPQ)和功率电压稳定指数(PVSI)的新型多目标函数。在IEEE 69总线上测试了MPA方法的性能,并与其他有竞争力的优化方法进行了比较。仿真结果表明,在尊重其他相关技术的前提下,应用MPA算法求解EVCS和RDG混合机组同时分配最优解的有效性、可行性和优越性。
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引用次数: 0
Simulation for Design the Compressed ECG Signal Transmission System with Baseline Wander Noise 考虑基线漂移噪声的压缩心电信号传输系统的仿真设计
Pub Date : 2023-05-08 DOI: 10.1109/ieCRES57315.2023.10209428
A. Ukasha, Mousa Hasan Omar, Mabrouka Idrees Fadel
An electrocardiogram (ECG) signal is a representation of the electrical activity generated by the heart muscles that is primarily used to detect heart abnormalities. Due to the sensitive nature of the ECG, it contains many types of noise such as baseline wandering, powerline interference, EMG signal, and electrode motion artifacts. This paper introduces a simple signal processing techniques to remove baseline wandering noise from ECG signal. Baseline wandering is a low-frequency noise ranging from 0.5 to 0.6 Hz. This paper proposes a Notch filter and an orthogonal wavelet family by Daubechies families to reduce baseline wandering from the ECG signal. In this work, the ECG compression is based on discrete cosine transform (DCT) and Run Length Encoding (RLE). A comparative study for system performance of the ECG signal in terms of compression ratio (CR), percentage root mean square difference (PRD), mean square error (MSE), and peak-signal-to-noise ratio (PSNR). The results showed that only 12% of the DCT coefficients after the compression process are used to reconstruct the ECG signal, with a compression ratio up to 8.6957 by using (RLE) encoding. Percentage root mean square difference is 0.1436 (PRD) after filtering the signal with a low-pass FIR at the PSNR is equal to 31. 0157dB at the end point of the receiver.
心电图(ECG)信号是由心肌产生的电活动的表示,主要用于检测心脏异常。由于心电图的敏感性,它包含许多类型的噪声,如基线漂移、电力线干扰、肌电图信号和电极运动伪影。介绍了一种简单的信号处理技术,用于去除心电信号中的基线徘徊噪声。基线徘徊是一种0.5 ~ 0.6 Hz的低频噪声。本文提出了一种陷波滤波器和一种基于Daubechies族的正交小波族来减少心电信号的基线漂移。在这项工作中,心电压缩是基于离散余弦变换(DCT)和运行长度编码(RLE)。从压缩比(CR)、百分比均方根差(PRD)、均方误差(MSE)和峰值信噪比(PSNR)等方面对心电信号的系统性能进行了比较研究。结果表明,压缩后的DCT系数仅占12%,采用(RLE)编码后的心电信号压缩比高达8.6957。在PSNR = 31时,用低通FIR滤波后的信号的百分比均方根差为0.1436 (PRD)。0157dB在接收器的末端。
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引用次数: 0
期刊
2023 8th International Engineering Conference on Renewable Energy & Sustainability (ieCRES)
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