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

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ContikiOS based library fire detection system 基于ContikiOS的图书馆火灾探测系统
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391340
Burak Karaduman, Moharram Challenger, Raheleh Eslampanah
In this paper, a ContikiOS based Library Fire Detection System has been designed and implemented using wireless sensor networks. The system consists of Atmel AVR IRIS motes which are operating with IEEE 802.15.4 network protocol, Linux based RaspberryPI, and ESP8266 Wi-Fi transceiver. The system can be easily transported, re- positioned and expanded. Benefiting from multithreading feature of ContikiOS and executing the tasks in parallel, the system has a short response time, which is critical for fire detection. According to the test results, the system responds to the changes in temperature and prompts a warning/alarm message in approximately 4 seconds.
本文设计并实现了一个基于contkios的无线传感器网络图书馆火灾探测系统。该系统由采用IEEE 802.15.4网络协议的Atmel AVR IRIS motes、基于Linux的RaspberryPI和ESP8266 Wi-Fi收发器组成。该系统便于运输、重新定位和扩展。得益于ContikiOS的多线程特性和并行执行任务,该系统具有较短的响应时间,这对火灾探测至关重要。根据测试结果,系统对温度变化做出反应,并在大约4秒内提示警告/报警信息。
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引用次数: 11
Selective harmonic elimination for three-phase voltage source inverters using whale optimizer algorithm 基于whale优化算法的三相电压源逆变器选择性谐波消除
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391290
Gamze Nalcaci, M. Ermiş
Selective Harmonic Elimination (SHE) shows superior harmonic performance at low switching frequencies to eliminate low-order harmonics and this property decreasing losses is a very effective way to reach higher efficiencies in power electronics applications. In this paper, Whale Optimizer Algorithm (WOA) is implemented to decide optimum switching angles for three-phase Voltage Source Inverter (VSI) of eliminating some high order harmonics while providing the required voltage. Besides, Particle Swarm Optimization (PSO) algorithm is also applied and the optimum switching angles are calculated off-line to eliminate the 5th, 7th, 11th, 13th, 17th, and 19th harmonics. The output voltages obtained by the application of WOA and PSO are compared using the total harmonic distortion (THD). By the comparison of these results, we show that WOA gives faster and more accurate results in terms of decreasing THD than PSO algorithm in SHE applications.
选择性谐波消除(SHE)在低开关频率下显示出优越的谐波性能,以消除低阶谐波,这种特性降低了损耗,是电力电子应用中达到更高效率的一种非常有效的方法。本文采用Whale优化算法(WOA)来确定三相电压源逆变器(VSI)的最佳开关角,以在提供所需电压的同时消除部分高次谐波。此外,采用粒子群优化算法(Particle Swarm Optimization, PSO)离线计算最优开关角,消除第5、7、11、13、17、19次谐波。利用总谐波失真(THD)对WOA和PSO的输出电压进行了比较。通过对这些结果的比较,我们发现在SHE应用中,WOA算法在降低THD方面比PSO算法更快、更准确。
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引用次数: 11
Classification of CAD dataset by using principal component analysis and machine learning approaches 基于主成分分析和机器学习方法的CAD数据集分类
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391358
Ali Cüvitoğlu, Z. Işik
Machine-Learning (ML) methods are applied to diagnose diseases and to observe disease developments. We utilized several ML methods on Z-Alizadeh Sani dataset, which is about Coronary Artery Disease (CAD). We applied t-test for feature selection and then Principal Component Analysis (PCA) to reduce dimensionality because of small sample size. 10-fold Cross-Validation was applied to ML methods, which achieved higher than 80% average accuracy. Besides, sensitivity and specificity results are around 70% and 90%, respectively. The Artificial Neural Network reached 93% AUC, which is the best performance out of six methods. The overall results are quite promising compared to the previous study.
机器学习(ML)方法被应用于疾病诊断和观察疾病发展。我们在关于冠心病(CAD)的Z-Alizadeh Sani数据集上使用了几种ML方法。由于样本量小,我们采用t检验进行特征选择,然后采用主成分分析(PCA)进行降维。对ML方法进行10倍交叉验证,平均准确率高于80%。敏感性约为70%,特异性约为90%。人工神经网络的AUC达到93%,是6种方法中性能最好的。与之前的研究相比,总体结果相当有希望。
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引用次数: 12
Time-domain analysis of full-wave quasi-resonant zero-current switching buck converter by modified nodal analysis 基于修正节点分析的全波准谐振零电流开关降压变换器时域分析
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391294
İskender Özdemir, A. Yildiz
In this study, an efficient method for the analysis of full-wave quasi-resonant zero-current switching buck converter is proposed. To decrease the switching losses, the converter control uses with zero-current switching (ZCS) technique. In the analysis, the modified nodal analysis (MNA) is used to obtain system equations. Simulation results are included to the study.
本文提出了一种分析全波准谐振零电流开关降压变换器的有效方法。为了降低开关损耗,变换器控制采用零电流开关技术。在分析中,采用修正节点分析(MNA)得到系统方程。仿真结果也被纳入到研究中。
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引用次数: 1
An improved duty cycle ZVT two swicth forward converter 一种改进型占空比ZVT双开关正激变换器
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391297
H. Bodur, F. Zungor, Erdem Akboy
In this paper, an isolated dc-dc converter based on an active demagnetization structure is presented in order to demagnetize transformer of a converter. Also, duty cycle limitation of two switch forward converter is improved with using this structure. At the same time, A Zero Voltage Transition (ZVT) cell is integrated into this improved converter and Soft Switching (SS) for the switches is achieved, too. So, the proposed converter has features duty cycle more than %50 and no turn on switching losses. Operation principles, theoretical analyses and design methods are presented. These theoretical analyses are verified with simulation results using PowerSIM (PSIM) programme.
本文提出了一种基于有源消磁结构的隔离式dc-dc变换器,以实现变换器变压器的消磁。同时,该结构还提高了双开关正激变换器的占空比限制。同时,将零电压转换单元集成到改进的变换器中,并实现了开关的软开关(SS)。因此,所提出的变换器具有占空比大于50%和无导通开关损耗的特点。介绍了其工作原理、理论分析和设计方法。利用PowerSIM (PSIM)仿真软件对理论分析进行了验证。
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引用次数: 1
Comparison of phase and level shifted switching methods for a three-phase modular multilevel converter 三相模块化多电平变换器移相和移电平开关方法的比较
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391307
A. O. Arslan, M. Kurtoglu, F. Eroǧlu, A. Vural
In this study, a three-phase, 10-kV DC, 50-Hz, modular multilevel converter is designed in PSCAD environment by using 10 sub-modules in each arm. For each submodule of the designed converter, half bridge structure consisting of two IGBTs, two reverse parallel connected diodes and one capacitor are used. The gate signals triggering the semiconductors are obtained by comparing sinusoidal reference signal and triangular carrier signals are used to compare the level shift and phase shift pulse width modulation (PWM) methods. Modulation methods are compared by changing the modulation index and carrier frequency in terms of switching cases, DC voltage utilization factor and output voltage harmonic content. Level shifting (LS) method is advantageous in terms of number of switching with respect to phase shifting (PS) methods while phase shifting methods is better in terms of direct current voltage utilization factor and harmonic content. In the PS-PWM method, it is seen that the number of switching is independent from the modulation index, whereas in the level shifting PWM methods, the number of switching changes with respect to the modulation index. Modular multi-level converters (MMC) provide a cost advantage in medium and high voltage applications compared to conventional two and three-level inverters because of the output voltages do not need to filter out low harmonic content due to the sinusoidal proximity of the output voltages.
本研究在PSCAD环境下设计了一个三相、10kv直流、50hz的模块化多电平变换器,每个臂上有10个子模块。设计的变换器的每个子模块均采用由两个igbt、两个反向并联二极管和一个电容组成的半桥结构。通过对比正弦参考信号得到触发半导体器件的门信号,并利用三角载波信号对电平移位和相移脉冲宽度调制(PWM)方法进行比较。通过改变调制指数和载波频率,从开关情况、直流电压利用系数和输出电压谐波含量等方面对调制方法进行了比较。电平移法在开关次数上优于相移法,而相移法在直流电压利用系数和谐波含量上优于相移法。在PS-PWM方法中,可以看到开关次数与调制指数无关,而在电平移位PWM方法中,开关次数相对于调制指数而变化。与传统的二电平和三电平逆变器相比,模块化多电平转换器(MMC)在中高压应用中提供了成本优势,因为输出电压不需要由于输出电压的正弦接近而过滤掉低谐波内容。
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引用次数: 18
Prototype of buck converter using fuzzy logic control for LED driver 基于模糊逻辑控制的LED驱动器降压变换器原型
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391295
O. Setyawati, H. Suyono, H. Himawan, Nanang Sulistiyanto, M. Rif'an
We present model simulation as reference and ARM STM32 microcontroller - based prototype buck converter. The inductor current and output voltage of the buck converter were controlled using Mamdani method - fuzzy logic in pulse width modulation switching mode. In this research, the prototypes were built based on fuzzy logic and also PID (Proportional-Integral-Derivative) controller. The system prototype without controller, controlled by fuzzy logic, and controlled by PID reached settling time of 31 ms, 24 ms, and 60 ms, respectively. Steady state error of the system prototype controlled by PID was the least, i.e. 0.34 %, meanwhile the prototype controlled by fuzzy logic showed 1.34 % However, controlling the system using fuzzy logic was able to eliminate the overshoot completely. These design and experiment results show that the system can be used for adjusting LED (Light Emitting Diode) driver.
本文给出了基于ARM STM32单片机的降压变换器的仿真模型。在脉宽调制开关模式下,采用模糊逻辑控制buck变换器的电感电流和输出电压。在本研究中,基于模糊逻辑和PID(比例-积分-导数)控制器建立了原型。无控制器、模糊逻辑控制和PID控制的系统原型分别达到了31 ms、24 ms和60 ms的稳定时间。采用PID控制的系统原型稳态误差最小,为0.34%,而采用模糊逻辑控制的系统原型稳态误差为1.34%,而采用模糊逻辑控制的系统能够完全消除超调。设计和实验结果表明,该系统可用于调节LED (Light Emitting Diode)驱动器。
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引用次数: 1
Generalized adaptive phase-shifted PWM for single-phase seven-level cascaded H-bridge multilevel inverters 单相七电平级联h桥多电平逆变器的广义自适应移相PWM
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391291
F. Eroǧlu, A. O. Arslan, M. Kurtoglu, A. Vural
Cascaded H-bridge multilevel inverters have gained a significant popularity in medium to high power motor drive applications and grid-connected renewable energy systems in recent years. Under equal DC voltages, cascaded H-bridge multilevel inverters use phase-shifted pulse width modulation (PS-PWM) technique to generate the output voltage. However, under unequal DC voltages which may happen because of the renewable energy sources connected to front-end of the multilevel inverter, traditional PS-PWM method fails to achieve good output harmonics. In this paper, a frequency domain analysis of PS-PWM is presented. By using the analysis, a phase angle modification of traditional PS-PWM is introduced. The proposed method helps eliminate first order harmonics of triangular carrier frequency and its sidebands under randomly selected DC voltages and DC voltage fault conditions. Finally, simulation results for single phase seven- level cascaded H-bridge multilevel inverter are presented to validate the good performance of the proposed method.
近年来,级联h桥多电平逆变器在中大功率电机驱动应用和并网可再生能源系统中获得了显著的普及。级联h桥多电平逆变器在直流电压相等的情况下,采用相移脉宽调制(PS-PWM)技术产生输出电压。然而,在多电平逆变器前端接入可再生能源可能导致直流电压不均匀的情况下,传统的PS-PWM方法无法获得良好的输出谐波。本文对PS-PWM进行了频域分析。在此基础上,介绍了传统PS-PWM的相角修正方法。该方法可以消除随机选择的直流电压和直流电压故障条件下三角载波频率及其边带的一阶谐波。最后给出了单相七电平级联h桥多电平逆变器的仿真结果,验证了该方法的良好性能。
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引用次数: 8
Battery state of charge and state of health estimation for VRLA batteries using Kalman filter and neural networks 基于卡尔曼滤波和神经网络的VRLA电池充电状态和健康状态估计
Pub Date : 2018-05-03 DOI: 10.1109/ICEEE2.2018.8391298
Amin Sedighfar, M. R. Moniri
Determination of state of charge (SOC) and state of health (SOH) in today's world becomes an increasingly important issue in all the applications that include a battery. In fact, estimation of the SOC and SOH is a fundamental need for the battery, which is the most important energy storage in Hybrid Electric Vehicles (HEVs), smart grid systems, drones, UPS and so on. Regarding those applications, the estimation algorithms are expected to be precise and easy to implement. This paper presents an online method for the estimation of the SOC and SOH of Valve-Regulated Lead Acid (VRLA) batteries. The proposed method uses the well-known Kalman Filter (KF), and Neural Networks (NNs) and for SOH estimation uses Augmented Kalman Filter (AKF). All of the simulations have been done with MATLAB software. The NN is trained offline using the data collected from the battery discharging process. A generic cell model is used, and the underlying dynamic behavior of the model has used two capacitors (bulk and surface) and three resistors (terminal, surface, and end), where the SOC determined from the voltage represents the bulk capacitor. The aim of this work is to compare the performance of conventional integration-based SOC estimation methods with a mixed algorithm. Moreover, by containing the effect of temperature, the final result becomes more accurate.
在当今世界,充电状态(SOC)和健康状态(SOH)的测定在包括电池在内的所有应用中变得越来越重要。事实上,SOC和SOH的估算是电池的基本需求,而电池是混合动力电动汽车(hev)、智能电网系统、无人机、UPS等最重要的储能系统。对于这些应用,期望估计算法精确且易于实现。提出了一种阀控铅酸(VRLA)电池荷电状态和SOH在线估计方法。该方法使用了众所周知的卡尔曼滤波(KF)和神经网络(nn),并使用增广卡尔曼滤波(AKF)进行SOH估计。所有的仿真都是用MATLAB软件完成的。使用从电池放电过程中收集的数据离线训练神经网络。使用了通用电池模型,模型的底层动态行为使用了两个电容器(大块和表面)和三个电阻(终端,表面和端),其中从电压确定的SOC代表大块电容器。这项工作的目的是比较传统的基于集成的SOC估计方法和混合算法的性能。此外,由于考虑了温度的影响,最终结果更加准确。
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引用次数: 10
Time-domain analysis of static VAR compensator by modified nodal analysis 基于修正节点分析法的静态无功补偿器时域分析
Pub Date : 2018-05-01 DOI: 10.1109/ICEEE2.2018.8391319
E. Akçay, A. Yildiz
In this study, the analysis of fixed capacitor thyristor controlled reactor (FC-TCR), one of Static VAR compensation techniques, is performed by modified nodal analysis (MNA). In the analysis, semiconductor elements are modelled with two- valued resistor concept. The resulting equations are solved by Trapezoidal method, used in numerical analysis. All of the simulation results are obtained in Matlab M-File environment.
本文采用修正节点分析法对静态无功补偿技术之一的固定电容晶闸管控制电抗器(FC-TCR)进行了分析。在分析中,半导体元件用二值电阻器概念建模。所得方程用梯形法求解,用于数值分析。所有仿真结果均在Matlab M-File环境下得到。
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引用次数: 1
期刊
2018 5th International Conference on Electrical and Electronic Engineering (ICEEE)
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