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2018 International Conference on Applied Smart Systems (ICASS)最新文献

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A processor in the loop implementation for a grid connected photovoltaic system considering power quality issues 考虑电能质量问题的并网光伏系统的环内处理器实现
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651962
Brahim Elkhalil Youcefa, A. Massoum, S. Barkat, S. Bella, P. Wira
Processor in the Loop (PIL) is a technique for the validation and verification of control algorithms on a real DSP board. This paper presents a PIL control implementation of a fully grid connected photovoltaic system for power quality improvement under nonlinear load variations. Moreover, the proposed control technique is based on predictive direct power control (PDPC) method. It reduces harmonics and provides reactive power compensation due to loads non-linearity and sudden variations. The source currents therefore recover a sinusoidal waveform with a unity power factor. Furthermore, the power transferred from the PV system into the utility grid is also increased. PIL co-simulation results prove the efficiency of the proposed implementation of the control algorithm.
在环处理器(PIL)是一种在实际DSP板上验证控制算法的技术。本文提出了一种全并网光伏系统在非线性负荷变化下改善电能质量的PIL控制实现方法。此外,该控制技术基于预测直接功率控制(PDPC)方法。它减少谐波,并提供无功补偿由于负载的非线性和突然变化。因此,源电流恢复一个具有单位功率因数的正弦波形。此外,从光伏系统传输到公用电网的功率也增加了。PIL联合仿真结果证明了所提控制算法的有效性。
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引用次数: 1
High-performance Zynq FPGA-based wireless sensor node for vibration monitoring systems 基于高性能Zynq fpga的振动监测系统无线传感器节点
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8652026
Bengherbia Billel, Ould Zmirli Mohamed, Chadli Samir, Toubal Abdelmoghni, M. Mohamed, Lachenani Sidahmed
Vibration-based condition monitoring of rotating machinery is considered as the most effective strategies of early fault detection and maintenance. Wired solutions in the traditional vibration analyses and surveillance systems suffer considerably from several disadvantage such as low mobility and high cost of installation and maintenance. The technological progresses led in the last decades in the fields of microelectronics, micromechanics and wireless technologies have brought a new generation of ad hoc networks called wireless sensor networks (WSN) that presents significant challenges and offers economic practical solutions. The use of the WSN in the vibration analysers is useful to monitor and analyse the vibration of rotating machinery as well as early fault detection. However, the vibration analyser WSN based must meet several requirements such as high-performance processing capabilities with a high sampling rate and low power consumption. System-on-chip (SoC) designs based on FPGA circuit is an attractive approach to increase performance and decrease costs during industrial equipment monitoring process. In the present work, we designed and implemented a high-performance wireless node for vibration analysing based on Xilinx Zynq FPGA platform. The proposed node collects a tri-axes vibration data and performs FFT computations of maximum 16384 points. FFT results are then transferred to the base station through an Xbee module. The experimental results showed that the node achieves the requirements of high-sampling rate up to 50 kHz, where the relative error between the computed frequency by the FFT of the node and the real frequency of the generated signal can be reduced to less than 0.1%.
基于振动的旋转机械状态监测被认为是早期故障检测和维修的最有效策略。在传统的振动分析和监测系统中,有线解决方案存在许多缺点,例如移动性低、安装和维护成本高。在过去的几十年里,微电子、微力学和无线技术领域的技术进步带来了新一代的自组织网络,称为无线传感器网络(WSN),它提出了重大挑战,并提供了经济实用的解决方案。无线传感器网络在振动分析仪中的应用有助于对旋转机械的振动进行监测和分析,以及早期的故障检测。然而,基于WSN的振动分析仪必须满足高性能处理能力、高采样率和低功耗等要求。基于FPGA电路的片上系统(SoC)设计是工业设备监控过程中提高性能和降低成本的一种有吸引力的方法。本文设计并实现了一种基于Xilinx Zynq FPGA平台的高性能无线振动分析节点。该节点采集三轴振动数据,进行最大16384个点的FFT计算。FFT结果然后通过Xbee模块传输到基站。实验结果表明,该节点达到了高达50 kHz的高采样率要求,节点的FFT计算频率与产生信号的实际频率之间的相对误差可以降低到0.1%以下。
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引用次数: 2
IoT-based experimental prototype for monitoring of photovoltaic arrays 基于物联网的光伏阵列监测实验样机
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8652014
A. Hamied, A. Mellit, MA. Zoulid, R. Birouk
In this paper a smart prototype has been designed for monitoring of PV arrays using Internet of Things (IoT). An electronic sensing board has been designed. A website application has been also developed in order to monitor the data online (electrical PV array current and voltage, air temperature and solar irradiance). The designed prototype has been verified experimentally at Renewable Energy Laboratory in Jijel University (Algeria). Experimental results showed the capability of the prototype to monitor the data without using additional circuits and efforts. The prototype could be used for fault detection (FD) in PV arrays by integrating for example a FD algorithm.
本文设计了一个智能原型,用于利用物联网(IoT)监测光伏阵列。设计了一种电子传感板。还开发了一个网站应用程序,以便在线监测数据(光伏阵列电流和电压、空气温度和太阳辐照度)。设计的原型已经在Jijel大学(阿尔及利亚)的可再生能源实验室进行了实验验证。实验结果表明,该样机无需额外的电路和努力就能监测数据。该原型可用于光伏阵列的故障检测(FD),例如通过集成FD算法。
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引用次数: 16
A neural-based approach for impoving the magnification of degraded document images from mobile terminals 一种用于提高来自移动终端的降级文档图像放大率的基于神经的方法
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651994
Zakia Kezzoula, Soumia Faouci, Djamel Gaceb
Optical reading of degraded and low-resolution text requires the application of an effective super-resolution approach to improve the recognition rate. In this context, we propose a new approach to improve the finesse and reduce the complexity of an existing non-linear super-resolution method, which is inefficient on low-resolution degraded texts from mobile terminals. In order to preserve the readability of fine line text on this type of images, it is important to increase the local neighborhood perimeter without increasing computational complexity. Our approach is a new way of using of a neural architecture based on multi-layer perceptron. It represents a new technique of using a neural architecture by learning, linearizing and extending a limited super-resolution algorithm, non-linear, complex and inefficient on degraded character images. The obtained results demonstrate, also, the effectiveness of our approach compared to conventional approaches based on a direct neuronal learning of low / high resolution transformation.
光学读取退化和低分辨率文本需要采用有效的超分辨率方法来提高识别率。在此背景下,我们提出了一种新的方法来提高现有的非线性超分辨率方法的灵巧性和降低复杂性,该方法在移动终端的低分辨率退化文本上效率低下。为了保持这类图像上细线文本的可读性,在不增加计算复杂度的情况下增加局部邻域周长是很重要的。我们的方法是利用基于多层感知器的神经结构的一种新方法。它代表了一种利用神经结构学习、线性化和扩展有限超分辨率算法的新技术,该算法是非线性、复杂和低效的退化特征图像。获得的结果也表明,与基于低/高分辨率转换的直接神经元学习的传统方法相比,我们的方法是有效的。
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引用次数: 0
Fuzzy Sliding Mode Method for Speed regulation of a Dual Star Induction Machine Drive fed by Multi-level Inverters 多级变频器驱动双星感应电机的模糊滑模调速方法
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651948
E. Zaidi, K. Marouani, H. Bouadi, Abd Elhalim Kassel, L. Bentouhami, E. Merabet
This paper presents a robust fuzzy-sliding mode control (FSC) technique for speed control of a drive system based on dual star induction machine (DISM). The machine is fed by two multilevel voltage source inverters (MLVSI) and its control is achieved using a fuzzy-sliding mode controller combined with the indirect field oriented control (IFOC) technique. The MLVSI technology has recently emerged and applied to DC-AC conversion to obtain sinusoidal waveform and to fulfill different applications constraints such as: high power conversion, power segmentation and power control. The FSC has many advantages, such as: fast response good robustness, high efficiency and suppressed chattering phenomenon. The presented study is validated by a series of simulation results showing the main responses of the drive system in case of different operating conditions. Also, the proposed FSC controller is compared to the classical PI controller and demonstrated superior performances.
提出了一种基于双星感应电机(DISM)驱动系统的鲁棒模糊滑模控制技术。电机由两个多电平电压源逆变器(MLVSI)供电,并采用模糊滑模控制器与间接场定向控制(IFOC)技术相结合的方法实现控制。MLVSI技术是近年来出现的,并应用于DC-AC转换,以获得正弦波形,并满足不同的应用限制,如:高功率转换,功率分割和功率控制。FSC具有响应快、鲁棒性好、效率高、能抑制抖振现象等优点。通过一系列的仿真结果验证了所提出的研究结果,显示了不同工况下驱动系统的主要响应。并将所提出的FSC控制器与经典PI控制器进行了比较,证明了其优越的性能。
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引用次数: 4
Application of principal component analysis approach in gas turbine defect diagnosis 主成分分析法在燃气轮机缺陷诊断中的应用
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8652003
A. Bachir, A. Hafaifa, M. Guemana, Nadii Hadroug
Predictive maintenance requires tools to diagnose and determine the aging of equipment, to avoid failures. Numerous off-line and on-line diagnostic and monitoring systems have been proposed; the monitoring by the vibration analysis method is very good and gives an image of the operation of the gas turbine. The analysis of the vibration frequency can indicate the defective components. If the amplitude of the vibrations to a tendency of increase a decay of the components is expected through the time. The gas turbine assembly is generally in good condition even though some components have shown indications of damage because there is always a tolerance range. Parameter monitoring remains to be done to monitor the status of critical components and indications of damage, the application of the PCA method proposes a new approach to the diagnosis and classification of defects based on the vibration signal to monitor the gas turbine state. The characteristics of the vibration signal for a normal speed have many differences with respect to the frequency of the signal when the vibration fault occurs. The most common fault detection techniques have been proposed to detect faults with the frequency and amplitude of the FFT example vibration signals.
预测性维护需要工具来诊断和确定设备的老化,以避免故障。已经提出了许多离线和在线诊断和监测系统;利用振动分析方法对燃气轮机进行监测效果很好,能直观地反映燃气轮机的运行情况。通过对振动频率的分析,可以发现缺陷部件。如果振动的振幅有增加的趋势,则预计元件会随着时间的推移而衰减。燃气轮机组件通常处于良好状态,即使一些部件已经显示出损坏的迹象,因为总是有一个容忍范围。关键部件的状态监测和损伤迹象的参数监测仍有待完成,应用主成分分析方法提出了一种基于振动信号监测燃气轮机状态的缺陷诊断和分类的新方法。在正常转速下,振动信号的特征与振动故障发生时信号的频率有很多不同。最常见的故障检测技术是利用FFT示例振动信号的频率和幅值来检测故障。
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引用次数: 3
Space Vector Pulse Width Modulation for Three Phase Cascaded H-Bridge Inverter 空间矢量脉宽调制的三相级联h桥逆变器
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8652080
Rabiai Attia, Kouzou Abdellah, Hafaifa Ahmed
This paper presents the Space Vector Pulse Width Modulation technique (SVPWM) for Multilevel Cascaded H-Bridge Inverter (CHB Inverter) with a Resistive-Inductive Load (R-L Load) and an equal DC voltage source. Cascaded H-Bridge Inverter generate a large number of voltage vectors and redundant switching states, it create a problem of computational complexity in multilevel inverter. A simple space vector pulse width modulation strategy is proposed to approximate the reference vector, and the calculation of dwell time becomes very simple. Space Vector Modulation has a, numbers of features; good utilization of the DC-link voltage, low current ripple, low harmonic distortion (THD) and reduce switching losses. A three phase multilevel cascaded H-bridge Inverter has been constructed, and simulation results are presented to verify the theoretical study of the system model.
本文提出了一种具有电阻-电感负载(R-L负载)和等直流电压源的多电平级联h桥逆变器(CHB逆变器)的空间矢量脉宽调制技术(SVPWM)。级联h桥逆变器产生了大量的电压矢量和冗余的开关状态,给多电平逆变器带来了计算复杂度问题。提出了一种简单的空间矢量脉宽调制策略来逼近参考矢量,使得驻留时间的计算变得非常简单。空间矢量调制具有一个、多个特点;良好的利用直流链路电压,低纹波电流,低谐波失真(THD)和降低开关损耗。构建了一个三相多电平级联h桥逆变器,并给出了仿真结果,验证了系统模型的理论研究。
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引用次数: 3
Effect of commutation failures in a GIGRE model for HVDC link connected to AC network 与交流网络连接的高压直流输电链路的GIGRE模型换相故障的影响
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651952
L. Mazouz, S. Zidi, A. Hafaifa, S. Hadjeri, M. Khatir, Larbi Brahimi
The performance of an HVDC link is significantly affected by the strength of the AC network to which it is connected. The interactions between a AC system and a DC link and the associated problems depend to the strength of the CA system. This paper explores the effect of the control system on reestablishing the operation of a CIGRE benchmark model of HVDC link after commutation failures at the inverter, which is connected to a AC network. Single-phase and three-phase AC side faults are simulated using MATLAB / Simulink software.
高压直流输电线路的性能受其所连接的交流网络强度的显著影响。交流系统和直流链路之间的相互作用以及相关问题取决于CA系统的强度。本文探讨了在与交流网络相连接的逆变器换相故障后,控制系统对重建高压直流链路CIGRE基准模型运行的影响。采用MATLAB / Simulink软件对单相和三相交流侧故障进行了仿真。
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引用次数: 2
Robust Wide Area Power System Stabilizers Design in Multimachine System based on Backtracking Search Optimization 基于回溯搜索优化的多机系统鲁棒广域电力系统稳定器设计
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651953
Bousaadia Baadji, H. Bentarzi, A. Mati
In this paper the design of a robust wide-area power system stabilizers (WAPSS) taking into account the effect of the time delay using Backtracking Search optimization is presented. In The wide area control design the remote signal is used as input for the power system stabilizer since it has better observability compared to the local signal. However the introduced time delay due to communication links can degrade the performance of the WAPSS in some cases. The proposed BSA simultaneously search for the optimal WAPSS parameters that relocate the weakly damped modes and maximize the time delay for multiple operating conditions to guarantee the robustness. The effectiveness of the WAPSS is tested on the two-area four machine power system. The nonlinear simulation and eigenvalue analysis have revealed the effectiveness of the proposed controller in damping the inter-area oscillations even with a time delay in the remote signals.
提出了一种考虑时延影响的广域电力系统鲁棒稳定器的回溯搜索优化设计方法。在广域控制设计中,由于远端信号比本地信号具有更好的可观测性,因此远端信号被用作电力系统稳定器的输入。然而,在某些情况下,由于通信链路而引入的时间延迟可能会降低WAPSS的性能。该算法同时搜索最优WAPSS参数,使弱阻尼模态重新定位,并在多种工况下最大化时延,以保证系统的鲁棒性。在二区四机电力系统中测试了WAPSS的有效性。非线性仿真和特征值分析表明,所提出的控制器在抑制远端信号中存在时滞的区域间振荡方面是有效的。
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引用次数: 1
Early Fire Detection System Using Wireless Sensor Networks 基于无线传感器网络的早期火灾探测系统
Pub Date : 2018-11-01 DOI: 10.1109/ICASS.2018.8651977
B. Kadri, Benamar Bouyeddou, Djillali Moussaoui
Every year millions of hectares of forest are devastated by fire, which causes huge damage to forest and nature especially in a country such as Algeria where the size of our forests are in degradation. Existed methods for forest monitoring and fire detection are traditional and based on humans observation, which is inefficient due to the size of controlled regions. Therefore the deployment of automatic fire detection system is unavoidable to allow early and fast fire extinction. In this paper we present an early fire detection system based on Wireless Sensor Network.
每年都有数百万公顷的森林被大火烧毁,这对森林和自然造成了巨大破坏,特别是在阿尔及利亚这样一个森林面积正在退化的国家。现有的森林监测和火灾探测方法是传统的、基于人类观察的方法,由于控制区域的大小,效率低下。因此,部署火灾自动探测系统是实现早期快速灭火的必然要求。本文提出了一种基于无线传感器网络的早期火灾探测系统。
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引用次数: 20
期刊
2018 International Conference on Applied Smart Systems (ICASS)
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