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2018 5th International Conference on Electrical and Electronic Engineering (ICEEE)最新文献

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Distribution network fault section identification and fault location using artificial neural network 基于人工神经网络的配电网故障区段识别与故障定位
Pub Date : 2018-06-21 DOI: 10.1109/ICEEE2.2018.8391345
Masoud Dashtdar, R. Dashti, H. Shaker
In this paper, a method for fault location in power distribution network is presented. The proposed method uses artificial neural network. In order to train the neural network, a series of specific characteristic are extracted from the recorded fault signals in relay. These characteristics are obtained by wavelet transform on three-phase currents and sequences and extracting the high frequency characteristic. Since high frequencies are generated during the occurrence of the fault, signal information could be extracted using wavelet transform. After wavelet transform, the entropies of the minor components of the sequences as well as three-phase signals could be obtained using statistics to extract the hidden features inside them and present them separately to train the neural network. Also, since the obtained inputs for the training of the neural network strongly depend on the fault angle, fault resistance, and fault location, the training data should be selected such that these differences are properly presented so that the neural network does not face any issues for identification. Therefore, selecting the signal processing function, data spectrum and subsequently, statistical parameters and their combinations are very important. Finally, one could estimate the fault section, fault location, and fault resistance after implementing the neural network. The simulation results show the good performance of neural network for the faults in different angles, locations, and resistances.
本文提出了一种配电网故障定位方法。该方法采用人工神经网络。为了训练神经网络,从记录的继电器故障信号中提取一系列特定的特征。这些特征是通过对三相电流和序列进行小波变换并提取高频特征得到的。由于故障发生过程中会产生高频信号,因此可以利用小波变换提取信号信息。经过小波变换后,利用统计量得到序列和三相信号的小分量熵,提取其中的隐藏特征,分别呈现,训练神经网络。此外,由于神经网络训练所获得的输入强烈依赖于故障角度、故障阻力和故障位置,因此在选择训练数据时应使这些差异得到适当的体现,从而使神经网络不会面临任何识别问题。因此,选择信号处理函数、数据频谱以及随后的统计参数及其组合是非常重要的。最后,利用神经网络对故障区域、故障位置和故障电阻进行估计。仿真结果表明,神经网络对不同角度、不同位置、不同电阻的故障都有较好的处理效果。
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引用次数: 28
Protection coordination assessment and improvement of electrical network of an industrial complex in connection to power grid: An experience report 某工业园区电网并网保护协调评估与改进经验报告
Pub Date : 2018-06-21 DOI: 10.1109/ICEEE2.2018.8391343
R. Dashti, Salahedin Hassani, H. Shaker
Protection of electrical network of an industrial complex is a challenging task in particular in connection to the power grid. This paper is focused on this challenging task and reports on the experience of protection coordination assessment and improvement of electrical network of South Pars Gas Complex (SPGC) and in particular the third south Pars refinery. Today South Pars is the economic hub and heart of the gas and petrochemical industry in Iran. The continuous and stable production of gas from the South Pars Gas Field is very important. In order to supply power to the third south Pars refinery four gas turbine generators (GTG) each with a capacity of 41.1MW and two emergency diesel generators (EDG) each with a capacity of 4.5 MW have been installed. In addition to this, one external line to connect the plant to the power grid is considered. Now the third refinery as an island electrical network operates independently from the power grid and provides energy needs of the refinery process and utility units. By connecting the refinery's electrical network to the power grid short-circuit current value increases. If an error occurs on the internal network when the refinery is connected to the power grid, the fault current will be higher compared to when the Refinery works in island mode. This is because current is also injected from the power grid to the faulty point. In this paper, the third south Pars refinery protection coordination in connection to the power grid will be assessed. The ETAP software will be used for the simulation. While the paper reports the practical experience in relation to this particular case study, the approach and experience helps to face the practical challenges in similar projects.
工业综合体的电网保护是一项具有挑战性的任务,特别是与电网的连接。本文针对这一具有挑战性的任务,报告了南帕尔斯天然气综合体(SPGC)特别是南帕尔斯第三炼油厂电网保护协调评估和改进的经验。今天,南帕尔斯是伊朗的经济中心和天然气和石化工业的心脏。南帕尔斯气田天然气的持续稳定生产具有重要意义。为了向南帕尔斯第三炼油厂供电,已经安装了四台容量为41.1兆瓦的燃气轮机发电机(GTG)和两台容量为4.5兆瓦的应急柴油发电机(EDG)。除此之外,还考虑了一条将工厂连接到电网的外部线路。现在,第三个炼油厂作为一个孤岛电网独立于电网运行,并提供炼油过程和公用事业单位的能源需求。通过将炼油厂的电网连接到电网,短路电流值增加。当炼油厂接入电网时,如果内部网络出现故障,故障电流会比孤岛模式下的故障电流大。这是因为电流也从电网注入到故障点。本文将对南帕尔斯第三炼油厂并网保护协调进行评估。仿真将使用ETAP软件。虽然本文报告了与此特定案例研究相关的实践经验,但方法和经验有助于面对类似项目中的实际挑战。
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引用次数: 1
Grasshopper optimization algorithm for automatic voltage regulator system 自动调压系统的Grasshopper优化算法
Pub Date : 2018-06-21 DOI: 10.1109/ICEEE2.2018.8391320
B. Hekimoğlu, Serdar Ekinci
A novel design method is presented to determine optimum proportional-integral-derivative (PID) controller parameters of an automatic voltage regulator (AVR) system utilizing the grasshopper optimization algorithm (GOA). The proposed approach is a simple and effective algorithm that is able to solve many optimization problems even those with unknown search spaces effectively. The simplicity of algorithm provides high quality tuning of optimal PID controller parameters. The integral of time weighted squared error (ITSE) is used as the performance index to confirm the performance of the proposed GOA-PID controller. When compared to the other PID controllers based on Ziegler- Nichols (ZN), differential evolution (DE), and artificial bee colony (ABC) tuning methods, the proposed method is found highly effective and robust to improve AVR system's transient response.
提出了一种利用蚱蜢优化算法确定自动电压调节器(AVR)系统最优比例-积分-导数(PID)控制器参数的新设计方法。该方法是一种简单有效的算法,即使在搜索空间未知的情况下,也能有效地解决许多优化问题。算法的简单性提供了高质量的最优PID控制器参数整定。以时间加权平方误差积分(ITSE)作为性能指标,验证了所提出的GOA-PID控制器的性能。通过与基于Ziegler- Nichols (ZN)、差分进化(DE)和人工蜂群(ABC)整定方法的PID控制器进行比较,发现该方法对改善AVR系统的瞬态响应具有较高的鲁棒性和有效性。
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引用次数: 75
Optimization of out-of-band impedance environment for linearity improvements of microwave power transistors 优化带外阻抗环境,提高微波功率晶体管线性度
Pub Date : 2018-06-21 DOI: 10.1109/ICEEE2.2018.8391334
M. Chaudhary, Z. Memon, Z. Yusoff, J. Lees, J. Benedikt, P. Tasker
This paper introduces a novel method that allows the presentation of specific, broadband impedances to a DUT by loadpull. To investigate this method, a derivative of class J power amplifier termed BJ is emulated, which effectively lies between class J and class B along the reactive routes on the Smith chart. The mode helps explore baseband linearization approach and its suitability when using continuous mode architectures. Adopting out-of-band impedance optimization technique allows to present impedances and move progressively from a completely real set of loads to completely imaginary set of loads in a deterministic and systematic way. This further extends a view to look at how well the emulated mode linearizes at a set of BJ contour points along the way. The method uses multiple modulated signal sources, phase synchronized at both radio frequency (RF) and intermediate frequency (IF) to provide a complete multi-harmonic broadband loadpull capability controlled by a single local oscillator and allows complete impedance control at the DUT current generator plane.
本文介绍了一种新颖的方法,该方法允许通过负载拉力来表示对被测设备的特定宽带阻抗。为了研究这种方法,仿真了J类功率放大器的导数BJ,它沿着史密斯图上的无功路径有效地位于J类和B类之间。该模式有助于探索基带线性化方法及其在使用连续模式架构时的适用性。采用带外阻抗优化技术,可以以一种确定性和系统的方式,从完全真实的负载组逐步向完全虚构的负载组移动。这进一步扩展了一个视图,以查看仿真模式在一组BJ轮廓点上线性化的程度。该方法使用多个调制信号源,在射频(RF)和中频(IF)进行相位同步,以提供由单个本地振荡器控制的完整的多谐波宽带负载拉能力,并允许在DUT电流发生器平面进行完全的阻抗控制。
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引用次数: 2
Parameter optimization of power system stabilizer via Salp Swarm algorithm 基于Salp群算法的电力系统稳定器参数优化
Pub Date : 2018-06-21 DOI: 10.1109/ICEEE2.2018.8391318
Serdar Ekinci, B. Hekimoğlu
A novel application of a very recent heuristic-based method, namely Salp Swarm Algorithm (SSA) is presented here for tuning of power system stabilizer (PSS) in a multi- machine power system. The tuning problem of PSS parameters is expressed as an optimization problem and the SSA method is utilized for searching the optimal parameters. The efficacy of the SSA-based PSS design was successfully tested on a well- known 3-machine, 9-bus power system. The results are comparatively evaluated with the other results obtained by the Tabu Search (TS) and the Biogeography-Based Optimization (BBO) methods. From the eigenvalue analysis and nonlinear simulation results it is confirmed that for damping oscillations, the performance of the proposed SSA approach in this study is better than that obtained by other intelligent techniques (TS and BBO).
本文提出了一种基于启发式算法的新方法Salp群算法(SSA)在多机电力系统稳定器(PSS)整定中的应用。将PSS参数的整定问题表示为优化问题,并利用SSA方法搜索最优参数。基于ssa的PSS设计的有效性在一个著名的3机9母线电源系统上得到了成功的测试。并与禁忌搜索(TS)和基于生物地理的优化(BBO)方法的结果进行了比较评价。从特征值分析和非线性仿真结果证实,对于阻尼振荡,本文提出的SSA方法的性能优于其他智能技术(TS和BBO)。
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引用次数: 65
A fitness function for parameters identification of Bouc-Wen hysteresis model for piezoelectric actuators 压电作动器Bouc-Wen滞回模型参数辨识的适应度函数
Pub Date : 2018-06-20 DOI: 10.1109/ICEEE2.2018.8391313
A. Saleem, Serein Al-Ratrout, M. Mesbah
Piezoelectric actuators (PA) are widely used in micro and nano positioning systems owing to their high stiffness, fast response, compact structure, and high precision. However, nonlinear behaviors of PAs, due to inherited hysteresis, tend to deteriorate their tracking performance. Therefore, many research works have been devoted to the modeling the hysteresis behavior in PAs. A number of nonlinear models were proposed in the literature such as Bouc- Wen (BW). The performance of identification of BW parameters is highly affected by the type of optimization algorithm and the adopted fitness function. One widely used fitness function is the mean square error (MSE). This choice often results in a relatively high error at the peaks and valleys of the displacement waveform. In this paper, a new optimization fitness function, based on the error in the signal peaks and valleys, is proposed. This fitness function is used to estimate the BW model parameters using the particle swarm optimization (PSO) technique. Experimental and simulation results show that this choice of fitness function improved the performance by up to 90% at the peaks and valleys.
压电致动器具有刚度高、响应速度快、结构紧凑、精度高等优点,在微纳定位系统中得到了广泛的应用。然而,由于遗传迟滞,粒子群的非线性行为往往会降低粒子群的跟踪性能。因此,许多研究工作都致力于模拟PAs的迟滞行为。文献中提出了许多非线性模型,如Bouc- Wen (BW)模型。优化算法的类型和所采用的适应度函数对BW参数的辨识性能有很大影响。一个广泛使用的适应度函数是均方误差(MSE)。这种选择通常会导致在位移波形的峰值和低谷处产生相对较高的误差。本文提出了一种新的基于信号峰谷误差的优化适应度函数。利用该适应度函数,利用粒子群优化(PSO)技术估计模型参数。实验和仿真结果表明,这种适应度函数的选择在峰值和低谷处的性能提高了90%。
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引用次数: 10
Support vector machine of wavelet packet spectral features for identification of obstructive sleep apnea 基于小波包谱特征的支持向量机识别阻塞性睡眠呼吸暂停
Pub Date : 2018-06-20 DOI: 10.1109/ICEEE2.2018.8391366
Serein Al-Ratrout, A. Hossen
Sleep apnea is a complete or partial cessation of breathing during sleep. Obstructive sleep apnea (OSA) is one of the most common breathing-related sleep disorders. The well-known reliable and standard diagnosis test used by specialized physicians is the polysomnographic sleep study. However, this test is complex and time consuming and expensive. Therefore, a non-invasive technique applying signal-processing algorithms is of more benefits for identification of OSA patients from normal subjects. Any identification algorithm has two parts: feature extraction part and feature matching part. In this paper, the feature extraction part depends on the wavelet-packet decomposition technique of the Heart Rate Variability (HRV) signal. The feature matching part uses the support vector machine (SVM). The highest performance on MIT standard data is achieved by the linear support vector machine with 5 stages wavelet decomposition using db1 filters with specificity, sensitivity, and accuracy of 100%, 90% and 93.34%, respectively.
睡眠呼吸暂停是指睡眠时呼吸完全或部分停止。阻塞性睡眠呼吸暂停(OSA)是最常见的呼吸相关睡眠障碍之一。专业医生使用的众所周知的可靠和标准的诊断测试是多导睡眠图睡眠研究。然而,这种测试很复杂,耗时且昂贵。因此,应用信号处理算法的无创技术更有利于从正常受试者中识别OSA患者。任何识别算法都包括两个部分:特征提取部分和特征匹配部分。在本文中,特征提取部分依赖于心率变异性信号的小波包分解技术。特征匹配部分使用支持向量机(SVM)。采用db1滤波器进行5级小波分解的线性支持向量机在MIT标准数据上的性能最高,特异度为100%,灵敏度为90%,准确率为93.34%。
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引用次数: 7
Overcurrent relay coordination tool for radial distribution systems with distributed generation 带分布式发电的径向配电系统过流继电器协调工具
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391292
Poonyapa Sookrod, P. Wirasanti
The conventional structure of distribution systems is evolving rapidly due to the high penetration of distributed generation (DG). DG may have a detrimental effect on protection coordination of overcurrent relays regarding varying short circuit levels. Overcurrent relays are necessary to ensure the reliability of power system by avoiding malfunction and the unnecessary outage of the healthy part of the system. The relay settings have to be changed depending on capacity and location of installed DG. It is complexity to analyze all operating conditions. Therefore, the effects of DG presence on the existent relays must be investigated in order to maintain protection coordination. To overcome relay coordination problem, overcurrent relay coordination tool is proposed in this paper. This tool is developed using concept of adaptive protection scheme. Relay setting parameters are set automatically in response to changing systems. Furthermore, this proposed tool is suitable for the complex future radial distribution systems.
由于分布式发电的高度普及,传统的配电系统结构正在迅速演变。DG可能对过流继电器在不同短路电平下的保护协调产生不利影响。过流继电器是保证电力系统可靠性所必需的,它可以避免系统正常部分的故障和不必要的中断。继电器设置必须根据安装DG的容量和位置进行更改。分析所有的运行工况是很复杂的。因此,为了保持保护协调,必须研究DG的存在对现有继电器的影响。为了克服继电器协调问题,本文提出了过流继电器协调工具。该工具是利用自适应保护方案的概念开发的。继电器设置参数自动设置响应变化的系统。此外,该工具适用于未来复杂的径向配电系统。
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引用次数: 12
Modular multilevel converters: A study on topology, control and applications 模块化多电平变换器:拓扑、控制与应用研究
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391305
M. Kurtoglu, F. Eroǧlu, A. O. Arslan, A. Vural
Modular multilevel converters (MMCs) which have modular architecture and high output performance have been utilized for medium and high power energy conversion systems in recent years. During the last years, the significant studies related to the topology, control or applications of MMC have been conducted. In this paper, MMC circuit topologies, its modulation techniques and application fields are addressed. This paper not only highlights the circuit topology, control concept and applications of the MMC but also presents a review, particularly in terms of latest achievements of it. In addition to these, suggestions for future research topics and trends of MMC are discussed.
模块化多电平变换器具有模块化结构和高输出性能,近年来被广泛应用于中大功率能量转换系统中。在过去的几年里,人们对MMC的拓扑结构、控制和应用进行了大量的研究。本文介绍了MMC电路拓扑结构、调制技术及其应用领域。本文重点介绍了MMC的电路拓扑结构、控制概念和应用,并对MMC的最新研究成果进行了综述。最后,对MMC今后的研究方向和发展趋势提出了建议。
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引用次数: 3
Nonlinear control of a single phase shunt active filter connected photovoltaic systems via sliding mode 滑模法单相并联有源滤波器连接光伏系统的非线性控制
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391301
A. Elallali, A. A. C. Taghzaoui, Y. Mchaouar, A. Hamdoun, I. Lachkar
This paper presents the problem of controlling single-phase active power filter connected photovoltaic system via MPPT. We seek to meet a control strategy for the two following control objectives: i) ensuring the correction of the power factor (PFC) by eliminating harmonics generated by a non-linear load; ii) injecting in the power grid electric energy produced by solar panels, regulated by the MPPT. To achieve the above control objectives, a sliding mode control is designed as a nonlinear control technique applied in the inner loop and a simple proportional-integral (PI) controller is used in the outer voltage control. The System's stability is ensured by Lyapunov framework using system averaging theory. An experiment based on MATLAB/Simulink is designed to confirm the validity of proposed APF controller for this system.
本文提出了用MPPT控制单相有源电源滤波器连接光伏系统的问题。我们寻求满足以下两个控制目标的控制策略:i)通过消除非线性负载产生的谐波来确保功率因数(PFC)的校正;ii)向电网注入由MPPT调节的太阳能电池板产生的电能。为了实现上述控制目标,设计了滑模控制作为一种非线性控制技术应用于内环,并在外部电压控制中使用简单的比例积分(PI)控制器。利用系统平均理论,利用Lyapunov框架保证了系统的稳定性。设计了基于MATLAB/Simulink的实验,验证了所提出的有源滤波器控制器的有效性。
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引用次数: 6
期刊
2018 5th International Conference on Electrical and Electronic Engineering (ICEEE)
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