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2012 International Conference on Emerging Trends in Electrical Engineering and Energy Management (ICETEEEM)最新文献

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Application of accelerated life testing principles to project long term lumen maintenance of LED luminaires 加速寿命测试原理在LED灯具长期流明维护工程中的应用
K. Shailesh, S. Kini, C. P. Kurian, S. Tanuja, M. Kamath
This work presents our effort to predict the long term reliability of LED arrays using the application of accelerated life testing principles. Assessment of long term reliability and performance of LED arrays is a testing exercise but it is also vital for successful acceptance of Solid State Lighting (SSL) systems. The objective of this work is to analyze IESNA LM-80 test data obtained from the LED manufacturers to study how failure is accelerated by stress and fit an acceleration model to the data. This acceleration model can be used to accurately project the reliability of the LED arrays under normal operating conditions. The methodology was to apply statistical analysis to LM-80 test data and obtain accelerated models for life-stress relationships and life-time distributions. The Arrhenius-Weibull, Generalised Eyring-Weibull and Inverse Power-Weibull models were obtained and were compared for their effectiveness in to predicting the reliability of LED arrays.
这项工作展示了我们使用加速寿命测试原理预测LED阵列长期可靠性的努力。评估LED阵列的长期可靠性和性能是一项测试工作,但它对于成功接受固态照明(SSL)系统也至关重要。这项工作的目的是分析从LED制造商获得的IESNA LM-80测试数据,以研究应力如何加速失效,并将加速模型拟合到数据中。该加速模型可用于准确预测LED阵列在正常工作条件下的可靠性。方法是对LM-80试验数据进行统计分析,获得寿命-应力关系和寿命分布的加速模型。得到了Arrhenius-Weibull、generalized Eyring-Weibull和Inverse Power-Weibull模型,并比较了它们在预测LED阵列可靠性方面的有效性。
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引用次数: 7
Dynamic Economic Emission Dispatch problem with valve-point effect 具有阀点效应的动态经济排放调度问题
C. Rani, D. Kothari
The advancement in power systems has led to the development of Dynamic Economic Emission Dispatch (DEED)that is difficult to solve by classical optimization method. The proposed paper work is to evolve a simple and effective method for an optimum generation dispatch to minimize the fuel cost and emission of power networks. This paper presents a Chaotic Self Adaptive Particle Swarm Optimization (CSAPSO) algorithm to solve DEED problem. Many non-linear characteristics of the generator such as value point effect, non smooth cost functions of fuel and emission and ramp rate limits are considered in this proposed method. The cost function of the generator exhibits the non convex characteristics, as the valve point effects are modeled and imposed as rectified sinusoid components. The velocity, which is popularly known as sensitive parameter of CSAPSO is adjusted dynamically in order to increase its precision. A chaotic local search operator is introduced in the proposed algorithm to avoid premature convergence. The effectiveness of the proposed optimization is verified in simulation studies using MAT LAB software. In this proposed work, fuel cost and emission are treated as competing objectives. The applicability and high feasibility of the proposed method is validated on 10 unit test systems. Results of the application of the proposed method are presented in this reported work.
随着电力系统的发展,传统优化方法难以解决的动态经济排放调度问题得到了发展。提出了一种简单有效的优化发电调度方法,使电网的燃料成本和排放最小化。提出了一种混沌自适应粒子群优化算法(CSAPSO)来解决契约问题。该方法考虑了发电机的许多非线性特性,如值点效应、燃料和排放的非光滑成本函数以及斜坡速率限制。当阀点效应被建模并作为整流正弦分量施加时,发电机的成本函数表现出非凸特性。为了提高CSAPSO的精度,对通常被称为敏感参数的速度进行动态调整。为了避免算法过早收敛,在算法中引入了混沌局部搜索算子。利用MAT LAB软件进行了仿真研究,验证了该优化方法的有效性。在这项拟议的工作中,燃料成本和排放被视为竞争目标。在10个单元测试系统上验证了该方法的适用性和高可行性。本文给出了该方法的应用结果。
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引用次数: 5
A wavelet based protection scheme for distribution networks with Distributed Generation 一种基于小波的分布式发电配电网保护方案
Mahmood Shaik, M. Nageswara Rao, S. A. Gafoor
Integration of Distributed Generation (DG) in distribution power system would affect the fault current level and therefore the relay settings. This paper presents a protection scheme based on the Wavelet Transforms for the detection of the faults with and without DGs. Faults are simulated at each bus and the fault currents are analyzed with Haar wavelet to obtain detail coefficients of single level decomposition. Fault indices are calculated based on d-coefficients and compared with threshold for detecting the fault. The performance of the proposed protection scheme is tested by considering the variations in location and capacity of DG successfully.
分布式发电在配电系统中的集成将影响故障电流水平,从而影响继电器的整定。本文提出了一种基于小波变换的故障检测方案,用于检测带和不带dg的故障。对各母线进行故障模拟,利用Haar小波对故障电流进行分析,得到单级分解的详细系数。基于d系数计算故障指标,并与阈值进行比较,实现故障检测。通过考虑DG的位置和容量变化,成功地测试了所提出的保护方案的性能。
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引用次数: 9
"Notice of Violation of IEEE Publication Principles" A novel co-design approach for soft error mitigation for embedded system “违反IEEE发布原则的通知”一种嵌入式系统软错误缓解的新型协同设计方法
C. Amutha, M. Ramya, C. Subashini
The protection of processor-based systems to mitigate the harmful effect of transient faults. This paper proposes an Depth packet inspection methodology for facilitating the design of fault tolerant embedded systems, the packet inspection is possible in compressed data and thereby achieve high fault coverage in accuracy and speed. The methodology is supported by an infrastructure that hardware and software soft errors mitigation techniques in order to best satisfy both usual design constraints permits to easily combine hardware and software dependability requirements. It is based on a FPGA architecture that facilitates the implementation of software-based techniques, providing a uniform isolated from target hardening core that allows the automatic generation of protected source code.
以处理器为基础的系统的保护,以减轻瞬态故障的有害影响。为了方便嵌入式系统的容错设计,本文提出了一种深度包检测方法,可以对压缩数据进行包检测,从而在精度和速度上实现较高的故障覆盖率。该方法由基础设施支持,硬件和软件软件错误缓解技术为了最好地满足通常的设计约束,允许轻松地将硬件和软件可靠性要求结合起来。它基于FPGA架构,有助于实现基于软件的技术,提供与目标强化核心的统一隔离,允许自动生成受保护的源代码。
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引用次数: 1
An effective control technique for an Impedance Source Inverter based wind energy system 风电系统阻抗源逆变器的有效控制技术
F. M. Savio, M. S. Kumar
In this paper the effectiveness of the Control Strategies for the Impedence Source Inverter based Wind Energy Conversion System are compared. The wind energy system uses a Self Excited Induction Generator (SEIG) which is the most emerging application in the field of Wind Energy Conversion System (WECS). The proposed system is modeled with a generator-side Diode Bridge Rectifier and a Stand-Alone side ZSI. The control strategies used for the Impedance Source Inverter are Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width Modulation (SVWM) as two cases for the comparison of the Total Harmonic Distortion (THD). The comparison of both control strategy shows the efficiency of the output in terms of reduced current harmonics and the current harmonic content observed to be less in using SVPWM compared to SPWM, The results are generated in MATLABSIMULINK and are shown.
本文对基于阻抗源逆变器的风能转换系统控制策略的有效性进行了比较。风能系统采用自激感应发电机(SEIG),这是风能转换系统(WECS)领域中最新兴的应用。该系统采用发电机侧二极管桥式整流器和独立侧ZSI进行建模。阻抗源逆变器采用正弦脉宽调制(SPWM)和空间矢量脉宽调制(SVWM)两种控制策略来比较总谐波失真(THD)。两种控制策略的比较表明,在降低电流谐波方面,使用SVPWM的输出效率比使用SPWM的输出效率低,并且与SPWM相比,使用SVPWM的输出电流谐波含量更少,结果在MATLABSIMULINK中生成并显示。
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引用次数: 1
Power quality enhancement of wind generators connected to grid 并网风力发电机电能质量的提高
K. Shanthini, N. Verappan
The wind power generation is rapidly growing and the use of wind farms and other distributed power generation systems have drastically increased. According to IEC standard, the power quality is determined from the performance of wind generators. In this paper using a FACTS controller device the power quality enhanced when the wind generators are connected to the grid system. The power quality becomes an issue when wind generators are connected to the grid, due to the interaction between the grid and the wind turbines. The main impact on the grid by the wind generators, regarding power quality, is related to voltage sag, reactive power, harmonics, power peaks and flickers. The power quality problem arises when the wind generators are equipped with the grid, can be improved by connecting a FACTS controller at a point of common coupling. In this paper, UPFC (UNIFIED POWER FLOW CONTROLLER) control scheme for the wind generators connected grid is used to improve the power quality using MATLAB/SIMULINK in power system block set. Also this UPFC control system that includes both the shunt converter and the series converter has been simulated. In this proposed model, the real and reactive power compensation is the main concern.
风力发电正在迅速增长,风力发电场和其他分布式发电系统的使用急剧增加。根据IEC标准,电能质量是由风力发电机的性能决定的。本文采用FACTS控制装置,提高了风力发电机并网后的电能质量。当风力发电机连接到电网时,由于电网和风力涡轮机之间的相互作用,电能质量成为一个问题。风力发电机对电网电能质量的主要影响与电压凹陷、无功功率、谐波、功率峰值和闪变有关。当风力发电机配备电网时,电能质量问题就会出现,可以通过在公共耦合点连接FACTS控制器来改善。本文采用UPFC(统一潮流控制器)控制方案,利用MATLAB/SIMULINK在电力系统块集中提高风力发电机并网的电能质量。并对并联变换器和串联变换器组成的UPFC控制系统进行了仿真。在该模型中,实功率和无功功率的补偿是主要考虑的问题。
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引用次数: 15
A review and study of harmonic mitigation techniques 谐波抑制技术综述与研究
T. Sekar, B. Justus Rabi
A periodic wave having a frequency that is an integral multiple of the fundamental power line frequency component is harmonics. They are the byproducts of modern electronics devices so it is necessary to mitigate the harmonics and offer techniques to mitigation of harmonics. This paper provides an explanation of the various harmonic mitigation techniques available to solve harmonic problems in three phase power systems. Included are the advantages and disadvantages of each method, their normal circuit connection as well as typical performance that can be expected when each method is properly employed.
频率是电力线路基本频率组成的整数倍的周期波是谐波。它们是现代电子设备的副产品,因此有必要减轻谐波,并提供技术来减轻谐波。本文介绍了解决三相电力系统谐波问题的各种谐波缓解技术。包括每种方法的优点和缺点,它们的正常电路连接以及每种方法正确使用时可以预期的典型性能。
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引用次数: 27
Dynamic resource allocation for machine to cloud communications robotics cloud 机器到云通信机器人云的动态资源分配
B. Dhiyanesh
The computation and information sharing capabilities of networked robotics by proposing a clond robotic architecture. The cloud robotics architecture leverages the combination of a virtual ad-hoc clond formed by machine-to-machine (M2M) communications among participating robots, and an infrastructure cloud enabled by machine-to-cloud (M2C) communications. Clond robotics utilizes elastic computing models, in which resources are dynamically allocated from a shared resource pool in the clond, to support task offloading and information sharing In robotic applications. The propose communication protocols, and several elastic computing models to handle different applications. The technical challenges in computation, communications and security, and illustrate the potential benefits of cloud robotics in several applications.
通过提出一种克隆机器人结构,提高了网络化机器人的计算能力和信息共享能力。云机器人架构利用了由参与机器人之间的机器对机器(M2M)通信形成的虚拟临时云,以及由机器对云(M2C)通信支持的基础架构云的组合。在机器人应用中,Clond机器人利用弹性计算模型,从Clond的共享资源池中动态分配资源,以支持任务卸载和信息共享。提出了通信协议,以及几种弹性计算模型来处理不同的应用。在计算、通信和安全方面的技术挑战,并说明云机器人在几个应用中的潜在好处。
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引用次数: 14
Monitoring semi-batch reactor using principal component analysis 用主成分分析法监测半间歇反应器
S. Damarla, M. Kundu
This work is aimed for the detection of fault occurred in the semi-batch reactor, which treats chromium sludge, at high sludge flow rate. Multivariate Statistical Process Control (MSPC) techniques and Principal component analysis (PCA) were applied to the simulated data for monitoring. In this work, an attempt is made by employing Lanczos symmetric tridiagonalization means for the determination of largest principal components instead of classical methods. Using established PCA model from normal operating condition batches, semi-batch reactor is monitored for specified time period in online fashion. T2 statistic was computed for each sample in order to identify abnormal scenario. The results have shown that the fault is successfully detected.
本文针对半间歇反应器处理铬污泥在高污泥流速下发生的故障进行了检测。采用多元统计过程控制(MSPC)技术和主成分分析(PCA)对模拟数据进行监测。在这项工作中,尝试采用兰佐对称三对角化方法代替经典方法来确定最大主成分。利用建立的主成分分析模型,对半间歇反应器进行了一段时间的在线监测。对每个样本计算T2统计量,以识别异常情况。结果表明,故障检测成功。
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引用次数: 0
Recovery and reliability prediction in fault tolerant automotive embedded system 汽车嵌入式容错系统的恢复与可靠性预测
B. Pattanaik, S. Chandrasekaran
The objective of the work is to propose a recovery and reliability prediction (R&R) in automotive embedded system. The existing reliability enhancement models are emphasizing various redundancy techniques both in hardware and software of recovery time minimization from the affected or degraded states in the automotive systems. The recovery oriented computing is based not only on the severity of the damage caused by the uncertain stimuli or random events on system components, important steps towards defining standard-based middleware which can satisfy real-time requirements in an embedded system. These requirements can only be fulfilled if the middleware utilizes the features of a real-time network. The Controller Area Network (CAN) is one of the most important networks in the field of real-time embedded systems. Automotive vehicles through embedded systems for reasons like emission control, vehicle connectivity, safety and cooperative behaviors. As the development often involves stakeholders from different engineering disciplines and organizations, the complexity due to shared requirements, interdependencies of data, functions, and resources, as well as tight constraints in regards to timing safety. A Redundancy Enabled Collaborative Recovery model is proposed in which the correct and timely activation of multiple recovery mechanisms through time and data redundancy techniques are used for the enhancement of system reliability.
本文的目的是提出一种汽车嵌入式系统的恢复与可靠性预测方法。现有的可靠性增强模型强调在硬件和软件上采用各种冗余技术,以使汽车系统在受影响或退化状态下的恢复时间最小化。面向恢复的计算不仅基于不确定刺激或随机事件对系统组件造成的损害的严重程度,而且是定义满足嵌入式系统实时性要求的基于标准的中间件的重要步骤。只有当中间件利用实时网络的特性时,才能满足这些需求。控制器局域网(CAN)是实时嵌入式系统中最重要的网络之一。汽车通过嵌入式系统进行排放控制,车辆连接,安全和合作行为。由于开发经常涉及来自不同工程学科和组织的涉众,由于共享需求、数据、功能和资源的相互依赖以及时间安全方面的严格约束而导致的复杂性。提出了一种冗余协同恢复模型,通过时间冗余和数据冗余技术,正确、及时地激活多个恢复机制,提高系统可靠性。
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引用次数: 11
期刊
2012 International Conference on Emerging Trends in Electrical Engineering and Energy Management (ICETEEEM)
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