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2015 International Conference on Energy Systems and Applications最新文献

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Robust control of DC drive using sliding mode control 采用滑模控制的直流驱动器鲁棒控制
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503429
Kushal Lodha, M. Bhawalkar
In this paper a sliding mode control (SMC) technique is used for speed control of DC drive. Electrical Drives are used in modern industrial applications with the recent development in power electronics devices. The main feature of SMC is order reduction, decoupling design procedure, load disturbance reduction, and insensitivity to parameter variations (called robustness of system). Reduced order model for DC drive with measured speed and observed state is used. In SMC with unmodelled dynamics chattering phenomenon is eliminated by constructing the sliding manifold based on reduced order with observer state as better than reduced order with measured state. In case of high order models of electric machine, non-linear ties in motion equations; uncertainties in model parameters and disturbances are the main obstacles for development mathematical analysis of such systems. The simulation result depicts that reduced order with observer state is better than reduced order with measured state.
本文采用滑模控制(SMC)技术对直流电机进行速度控制。随着电力电子设备的最新发展,电力驱动已用于现代工业应用。SMC的主要特点是降阶、解耦设计过程、负载干扰减少以及对参数变化不敏感(称为系统的鲁棒性)。采用降阶模型对直流驱动器进行速度测量和状态观察。在具有未建模动力学的滑模控制中,基于降阶观测器的滑模控制比基于降阶测量的滑模控制更有效,从而消除了滑模控制中的抖振现象。对于电机的高阶模型,运动方程中的非线性关系;模型参数的不确定性和扰动是发展此类系统数学分析的主要障碍。仿真结果表明,具有观测态的降阶效果优于具有测量态的降阶效果。
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引用次数: 2
Application of Wind energy system with active and reactive power injection into the utility grid 风电有功无功并网系统的应用
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503338
R. D. Thombare, P. T. Jadhav, D. More
The control strategies for back-to-back power conditioner of variable speed wind energy system are presented in this work. Hysteresis current control PWM technique is adopted to control machine side boost converter. The rectified dc voltage is maintained constant for various operating frequencies of the generator. Also, rectified dc voltage is varied up to desired level. The space vector PWM technique with MPPT is applied to control grid side converter. With the help of aforementioned PWM control techniques, the Active power generated from Wind Mill (PMSG generator) at high speed is fed to the utility grid at unity power factor (within the power conditioner VA rating) within the stipulated harmonic current standard. At low wind speed, reactive power is injected into the utility grid where PMSG act as dynamic VAR. The viability of these control strategies are validated through Matlab simulation results.
提出了变速风能系统背靠背功率调节器的控制策略。采用磁滞电流控制PWM技术控制机侧升压变换器。整流直流电压在发电机的不同工作频率下保持恒定。此外,整流直流电压变化到所需的水平。将空间矢量PWM技术与MPPT结合,应用于电网侧变换器的控制。在上述PWM控制技术的帮助下,风力发电机(PMSG发电机)高速产生的有功功率在规定的谐波电流标准内以单位功率因数(在功率调节器额定电压范围内)送入电网。在低风速下,将无功功率注入电网,以PMSG作为动态无功值,通过Matlab仿真结果验证了这些控制策略的可行性。
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引用次数: 0
The graphical security system by using CaRP 采用鲤鱼实现图形化安全系统
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503319
Pooja Kulkarni, G. Malwatkar
Now a days, there are many security systems are used for different security purposes. The text based passwords are widely used for authentication in many internet applications. But the text password is insecure for a variety of reasons. For example, users tend to pick passwords that can be easily guessed. On the other hand, if a password is hard to guess, then it is often hard to remember. Due to this reasons, the graphical password is the one best alternative for text based password. In this paper Captcha technology with the graphical password is introduced which increases the security. Captcha is the Completely Automated Public Turing test which tells the Computers and Humans Apart. Captcha is an image or a program that protects websites from bots that is computer generated program. Here graphical password system is built on top of Captcha technology, which is named as Captcha as graphical passwords (CaRP). CaRP is the combination of both graphical password and Captcha. CaRP system takes the advantages of both Captcha and the graphical password. It avoids the many security problems altogether. The problems like as shoulder-surfing attacks, relay attacks, online guessing attacks, etc. CaRP also overcome the disadvantages of graphical password system. Image hotspot problem is the well-known problem in graphical password system that is avoided in CaRP system. CaRP offers reasonable security and the usability it appears to fit well with same practical applications for improving online security.
如今,有许多安防系统被用于不同的安防目的。基于文本的密码在许多互联网应用中广泛用于身份验证。但是由于各种原因,文本密码是不安全的。例如,用户倾向于选择容易被猜到的密码。另一方面,如果一个密码很难猜测,那么它通常也很难记住。由于这个原因,图形密码是基于文本的密码的最佳替代方案。本文引入了图形化密码验证码技术,提高了安全性。Captcha是完全自动化的公共图灵测试,它可以区分计算机和人类。验证码是一种图像或程序,可以保护网站免受计算机生成程序的影响。这里图形密码系统是建立在验证码技术之上的,称为Captcha as graphical passwords (CaRP)。CaRP是图形密码和验证码的组合。CaRP系统同时采用验证码和图形密码的优点。它完全避免了许多安全问题。问题有:肩冲浪攻击、中继攻击、在线猜测攻击等。鲤鱼还克服了图形密码系统的缺点。图像热点问题是图形密码系统中众所周知的问题,在CaRP系统中避免了这一问题。CaRP提供了合理的安全性和可用性,它似乎非常适合用于提高在线安全性的实际应用。
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引用次数: 4
Loss reduction in 132kV Raymond Substation using DIgSILENT Power Factory by optimal capacitor placement 采用DIgSILENT Power Factory的132kV雷蒙变电站优化电容器布置降低损耗
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503435
P. Sonwane, B. E. Kushare
Capacitor compensation has been widely used in power system at different voltage levels from last five decades. In addition to this, optimal capacitor configuration has a number of advantages such as reducing losses, improving power factor and so on. Since capacitor supply reactive load locally, they improve the load carrying capability of the lines and therefore plays the same role as redundant lines. Since the capacitor bank is added in discrete steps the objective function is not differentiable and the capacitor placement problem is a mixed integer nonlinear program. This paper proposes a case study of 132kV Raymond substation for loss reduction. A Graph search algorithm is used to optimize the cost function. DIgSAILENT Power Factory software is used to evaluate case study of Raymond Substation.
近50年来,电容补偿技术在不同电压等级的电力系统中得到了广泛的应用。除此之外,优化电容器配置还具有降低损耗、提高功率因数等诸多优点。由于电容器局部供电无功负荷,提高了线路的载负荷能力,起到了冗余线路的作用。由于电容器组的加入是离散步骤,因此目标函数不可微,电容器布置问题是一个混合整数非线性规划问题。本文以132kV雷蒙变电站为例进行了减损研究。采用图搜索算法对代价函数进行优化。采用DIgSAILENT Power Factory软件对雷蒙变电站进行案例分析。
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引用次数: 1
Design and implementation of full bridge DC-DC converter for photovoltaic application 光伏应用全桥DC-DC变换器的设计与实现
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503393
S. Chavan, M. Chavan
This communication discusses design and implementation issues of full bridge DC-DC converter developed for photovoltaic application. Here component selection criteria, design and manufacturing of transformer and inductor has beed discussed. Simulation is performed in MATLAB SimPowerSystems toolbox and experimentation is performed on the developed prototype. The converter efficiency is found to be 94%.
本文讨论了用于光伏应用的全桥DC-DC变换器的设计和实现问题。本文对变压器和电感的选用标准、设计和制造进行了讨论。在MATLAB SimPowerSystems工具箱中进行了仿真,并对所开发的样机进行了实验。结果表明,该变流器的效率可达94%。
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引用次数: 4
Augmenting database performance via SQL tuning 通过SQL调优提高数据库性能
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503305
Vamsi Krishna Myalapalli, Thirumala Padmakumar Totakura, Sunitha Geloth
Exponential growth in size of the database in contemporary world inevitably necessitates performance maintenance, so as the database performance is sustained or enhanced. The suggested idea would oblige as a benchmark for efficient Query Tuning and Database Administration, thus enhancing database performance. The strategy of tuning determines how precisely we deal with each bottleneck. The paper reveals varied methodologies to speed up query execution in addition to database performance and can serve as a utility for Database developers, SQL Programmers, Database Administrators and Data Center Managers. Experimental conclusions of our exploration strongly advocate that performance is enriched by saving CPU, I/O and other resources.
在当今世界,数据库规模的指数级增长不可避免地需要性能维护,以便保持或增强数据库性能。建议的想法将有助于作为高效查询调优和数据库管理的基准,从而提高数据库性能。调优策略决定了我们如何精确地处理每个瓶颈。本文揭示了多种方法来加速查询执行和数据库性能,可以作为数据库开发人员、SQL程序员、数据库管理员和数据中心管理人员的实用工具。我们研究的实验结论强烈主张通过节省CPU、I/O和其他资源来提高性能。
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引用次数: 7
Skew detection of Devanagari script using pixels of axes-parallel rectangle and linear regression 基于轴平行矩形像素和线性回归的Devanagari文字倾斜检测
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503396
T. A. Jundale, R. Hegadi
Skew detection and correction of handwritten data is one of the difficult tasks in pattern recognition area. Here we illustrate the method for skew detection and correction of Devanagari handwritten script. The proposed approach works for single skew. The input images for this research are collected from various writers and contain single/uniform skew words/lines. The proposed approach uses tangential pixels of axes parallel rectangle and linear regression method to calculate the skew of word/line. Finally rotation transformation is used for correction of skew of word/line which is calculated by linear regression. This technique achieves 89% accuracy to correct skew of word and achieves 93% accuracy to correct skew of line for handwritten Devanagari script.
手写数据的倾斜检测与校正是模式识别领域的难点之一。在此,我们举例说明了Devanagari手写体的倾斜检测和校正方法。该方法适用于单偏态。本研究的输入图像来自不同的作者,包含单一/均匀的倾斜单词/行。该方法利用坐标轴平行矩形的切向像素和线性回归方法计算字/线的斜度。最后,利用旋转变换对线性回归计算的字/线倾斜进行校正。该技术对手写体Devanagari文字的斜度校正准确率达到89%,对斜度校正准确率达到93%。
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引用次数: 7
Adaptive approach in deregulation of Indian power system 印度电力系统放松管制的适应性方法
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503333
Krishna T. Madrewar, Walmik A. Gavhane, A. H. Kardile, U. Shiurkar
This paper presents the status of development of power market in India. Power industry is undergoing restructuring throughout the world. The traditional vertically monopolistic structure has been deregulated and replaced by gencos, transcos and discos with competition introduced to gencos and discos in order to reach higher efficiency in electricity production and utilization. With the rapid development of economy and the increasing interdependence between national infrastructures, power system is becoming more and more complicated. However for different countries, the principal objectives and considerations of power system deregulation are different. In this paper special considerations on power system deregulation of developing countries in Asia are discussed. Moreover, because of the deregulation of power system and the impact of power market, the deteriorated natural environment and the potential terrorism attack, power system is facing with more challenges and becomes more vulnerable than ever. Only this way, the power industry, as a significant infrastructure, can realize sustainable development at high efficiency. It is also shown that how to realize system more efficient and reliable operation.
本文介绍了印度电力市场的发展现状。世界各地的电力工业都在经历结构调整。传统的垂直垄断结构已被解除管制,取而代之的是发电公司、跨电公司和迪斯科舞厅,并引入了竞争,以达到更高的电力生产和利用效率。随着经济的快速发展和国家基础设施之间的相互依赖性日益增强,电力系统变得越来越复杂。然而,不同国家的电力系统放松管制的主要目标和考虑是不同的。本文讨论了亚洲发展中国家电力系统放松管制的特殊考虑。此外,由于电力系统的放松管制和电力市场的影响,自然环境的恶化以及潜在的恐怖袭击,电力系统面临着更多的挑战,变得比以往任何时候都更加脆弱。只有这样,作为重要基础设施的电力工业才能实现高效可持续发展。介绍了如何实现系统更高效、可靠的运行。
{"title":"Adaptive approach in deregulation of Indian power system","authors":"Krishna T. Madrewar, Walmik A. Gavhane, A. H. Kardile, U. Shiurkar","doi":"10.1109/ICESA.2015.7503333","DOIUrl":"https://doi.org/10.1109/ICESA.2015.7503333","url":null,"abstract":"This paper presents the status of development of power market in India. Power industry is undergoing restructuring throughout the world. The traditional vertically monopolistic structure has been deregulated and replaced by gencos, transcos and discos with competition introduced to gencos and discos in order to reach higher efficiency in electricity production and utilization. With the rapid development of economy and the increasing interdependence between national infrastructures, power system is becoming more and more complicated. However for different countries, the principal objectives and considerations of power system deregulation are different. In this paper special considerations on power system deregulation of developing countries in Asia are discussed. Moreover, because of the deregulation of power system and the impact of power market, the deteriorated natural environment and the potential terrorism attack, power system is facing with more challenges and becomes more vulnerable than ever. Only this way, the power industry, as a significant infrastructure, can realize sustainable development at high efficiency. It is also shown that how to realize system more efficient and reliable operation.","PeriodicalId":259816,"journal":{"name":"2015 International Conference on Energy Systems and Applications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123115778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Non transformer ZVZCS resonant PWM(RPWM)DC DC converter for high step up and high power applications 无变压器ZVZCS谐振型PWM(RPWM)DC - DC变换器,适用于高升压和高功率应用
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503356
V. A. Patil, M. Hans
The demand for non isolated ZVZCS (Zero voltage Zero current) DC-DC converter with high voltage gain is increases day by day. This converter is suitable for the application such as Hybrid electrical vehicles, fuel cell, ups etc. The proposed method consist of non transformer ZVZCS RPWM high step up dc-dc converter with improved switching method suitable for high power applications. The proposed converter achieves zero voltage switching turn on of the switches as well as reduced turn off the losses in continuous conduction mode which consist of resonance in the auxiliary circuit. As the result of proposed method, by considering small duty cycle reverse recovery losses of diode becomes negligible with low switch current. The auxiliary capacitor reduces its cost & volume as compared with PWM method. In order to verify the result a non transformer ZVZCS RPWM dc-dc converter is designed in MATLAB/SIMULINK & compared with prototype hardware results.
对无隔离零电压零电流高电压增益DC-DC变换器的需求日益增加。该转换器适用于混合动力汽车、燃料电池、ups等应用。该方法由无变压器ZVZCS RPWM高阶升压dc-dc变换器和改进的开关方法组成,适用于大功率应用。该变换器在辅助电路谐振的连续导通模式下,实现了开关的零电压开关导通以及降低了导通损耗。由于该方法考虑了小占空比,当开关电流较低时,二极管的反向恢复损耗可以忽略不计。与PWM方法相比,辅助电容降低了成本和体积。为了验证结果,在MATLAB/SIMULINK中设计了一个无变压器ZVZCS RPWM dc-dc变换器,并与样机硬件结果进行了比较。
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引用次数: 3
Optimizing Big Data Processing in Cloud by integrating versatile front end to Database Systems 通过将多功能前端集成到数据库系统,优化云中的大数据处理
Pub Date : 2015-10-01 DOI: 10.1109/ICESA.2015.7503370
Vamsi Krishna Myalapalli, Thirumala Padmakumar Totakura
The magnitude of data in the concurrent databases is exponentially escalating with respect to time. This advent conveys a challenge in the arena of performance, due to incessant data accumulation, manipulation, analyzing and processing massive volumes of data. The rising space among users and data, invokes inventive tool(s) for resolving the challenges tackled by velocity, volume and variety of Big Data. This paper introduces a novel and versatile Front End Module an Entry Control Module integrated to the Database System(s) in Cloud environments to minimize the impact on underlying database(s). In a nutshell this module aims at performance engineering at Database level, so that the saved band width could be used to process other requests arriving Database. Our experimental approaches and progression evinced that response time is reduced and bandwidth is preserved. Comprehensively, the impact on database(s) is/are minimized.
并发数据库中的数据量随着时间呈指数级增长。由于不断的数据积累、操作、分析和处理大量数据,这种出现在性能领域带来了挑战。用户和数据之间的空间不断扩大,需要创造性的工具来解决大数据的速度、数量和多样性所带来的挑战。本文介绍了一种新颖而通用的前端模块,即集成到云环境中数据库系统的入口控制模块,以最大限度地减少对底层数据库的影响。简而言之,该模块旨在数据库级的性能工程,以便节省的带宽可以用于处理到达数据库的其他请求。我们的实验方法和进展表明,响应时间缩短,带宽保留。总的来说,对数据库的影响是最小的。
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引用次数: 3
期刊
2015 International Conference on Energy Systems and Applications
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