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2010 IEEE Industry Applications Society Annual Meeting最新文献

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A Dynamic Dynamometer for Testing of Mining DC Motors 矿用直流电机动态测功机的研制
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615624
R. Betz, G. Mirzaeva, T. Summers
This paper describes the development of a 2.2 MW DC electric machine based dynamometer for the cyclic testing of motors used in mining applications. The dynamometer, through the application of sophisticated control, is able to simulate the real dynamic digging conditions of an electric rope shovel. The paper will discuss the facility and the control algorithms to implement the dynamic dynamometer. Simulation results will be presented.
本文介绍了一种用于矿山电机循环测试的2.2 MW直流电机测功机的研制。该测功机通过精密控制的应用,能够模拟电动绳铲的真实动态挖掘工况。本文将讨论实现动态测功机的设备和控制算法。将给出仿真结果。
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引用次数: 10
Electric Power System Analysis and Design of an Expanding Steel Cogeneration Plant 某扩建热电厂电力系统分析与设计
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5616762
Cheng-Ting Hsu, Chao-Shun Chen, Chia-Hung Lin
This paper presents the electric power system analysis and design of an expanding steel cogeneration plant. The power system configuration and the equipment parameters of the cogeneration plant are well designed according to the power flow, short circuit, voltage fluctuation, harmonic flow and transient stability analyses. According to the power flow analysis, the site and capacity of shunt capacitor banks as well as the tap position of transformers are determined to maintain all the buses voltage at acceptable range and to keep the power factor above 0.95. Also, to comply with the restriction of circuit breaker capacity, the high impedance transformers are designed even if they consumed more reactive power from the system. In addition, the voltage fluctuation resulted from the dramatic reactive power variation of hot strip rolling mill can be greatly reduced if proper static var compensator (SVC) is installed. The significant voltage sag due to the starting of induction motor can be effectively improved by applying wye-delta transformer starter. Furthermore, the total voltage harmonic distortion (THDV) and the total current demand distortion (TDDI) are both acceptable if the proper filters are installed. It is also found that the cogeneration system can keep stable operation in isochronous mode by applying the governor control action and the load shedding scheme after tie line tripping. It is concluded that the power system analyses is important for the steel plant with cogeneration unit to identify hidden problems and remedy strategy to ensure the system power quality and operation performance.
本文介绍了某新建热电厂的电力系统分析与设计。根据潮流分析、短路分析、电压波动分析、谐波分析和暂态稳定分析,对热电联产电厂的电力系统配置和设备参数进行了优化设计。根据潮流分析,确定并联电容器组的位置、容量和变压器分接位置,使各母线电压保持在可接受范围内,使功率因数保持在0.95以上。同时,为了满足断路器容量的限制,即使高阻抗变压器消耗更多的系统无功功率,也要设计高阻抗变压器。此外,如果安装适当的静态无功补偿器(SVC),可以大大降低热连轧机组无功功率变化剧烈所引起的电压波动。采用眼型三角变压器起动器可以有效地改善感应电动机起动时电压骤降的问题。此外,如果安装适当的滤波器,总电压谐波失真(THDV)和总电流需求失真(TDDI)都是可以接受的。采用调速器控制和脱线后减载方案,可以使热电联产系统在等时模式下保持稳定运行。分析结果表明,电力系统分析对于发现热电联产钢厂存在的问题并制定对策,保证系统电能质量和运行性能具有重要意义。
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引用次数: 35
Performance Improvements in an Arc Welding Power Supply Based on Resonant Inverters 基于谐振逆变器的弧焊电源性能改进
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615497
A. Navarro-Crespin, R. Casanueva, F. Azcondo
This paper describes improvements developed in an arc welding power supply based on resonant inverters. A new stand-by operation sequence based on sliding phase is proposed in order to reduce the discharge capacitor size. This stand-by solution also relieves the voltage specification of the resonant inductor. The interleaving operation of paralleled stages and the output connection wires are used to minimize the output capacitor current ripple and so extend the power supply's lifetime. Moreover, synchronous rectification is proposed in order to increase the efficiency and reduce the operation temperature of the output power stage. Finally, sequences are described for establishing and extinguishing arcs. TIG welding is selected for testing operations.
本文介绍了一种基于谐振逆变器的弧焊电源的改进。为了减小放电电容的尺寸,提出了一种新的基于滑动相位的待机操作顺序。这种备用方案也减轻了谐振电感的电压规格。并联级和输出连接线的交错操作可以最大限度地减少输出电容电流纹波,从而延长电源的使用寿命。为了提高效率,降低输出功率级的工作温度,提出了同步整流的方法。最后,描述了建立和熄灭电弧的顺序。试验操作选用TIG焊。
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引用次数: 13
A New Method for Estimation and Control of Temperature Profile over a Sheet in Thermoforming Process 热成形过程中板料温度分布估计与控制的新方法
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615714
M. Chy, B. Boulet
This paper presents a new method for the estimation of surface temperature of a sheet using temperature sensors at different positions of the sheet. The proposed method is developed and designed in such a way that it can estimate the temperature profile over the entire sheet through its spatial harmonics and control the spatial harmonics to obtain the desired temperature profile. Computational cost is also considered during the development of the proposed method. A PI controller is used to control each spatial harmonic to achieve the desired temperature profile over the sheet. The proposed estimation method of the temperature profile is based on the two-dimensional FFT. Each component of the two-dimensional space temperature harmonics is controlled by adjusting the heater temperatures. The performance of the proposed temperature estimation technique is tested in simulation for different desired temperature profile to compare with a simple method of temperature estimation based on the weighted average temperature of the sensors surrounding the location of interest. Thereafter, the performance of the proposed temperature control technique based on the spatial harmonics is compared with the conventional control technique in simulation. The superiority of the proposed method for the estimation of temperatures and hence the accuracy of the developed controller and its prospective real-time application is evidenced by the results.
本文提出了一种利用薄板不同位置的温度传感器估算薄板表面温度的新方法。该方法可以通过空间谐波估计整个薄片的温度分布,并对空间谐波进行控制以获得所需的温度分布。在该方法的开发过程中,还考虑了计算成本。PI控制器用于控制每个空间谐波,以达到所需的温度分布在板材上。提出了基于二维FFT的温度分布估计方法。通过调节加热器温度来控制二维空间温度谐波的各分量。在不同的期望温度分布下,对所提出的温度估计技术进行了仿真测试,并与基于感兴趣位置周围传感器加权平均温度的简单温度估计方法进行了比较。在此基础上,通过仿真比较了基于空间谐波的温度控制技术与传统控制技术的性能。结果证明了所提出的温度估计方法的优越性,从而证明了所开发控制器的准确性及其潜在的实时应用。
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引用次数: 9
Reduction of Neutral Current in Airport Lighting System 减少机场照明系统中性点电流
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5614428
G. Bhuvaneswari, G. Somasundaram
Airport electrical distribution network has a number of non-linear and single-phase loads that cause imbalances, resulting in significant amount of current flow in the neutral conductor, even under normal operating conditions. The power quality of the airport distribution system is adversely affected by its lighting load controlled by a constant current controller. This paper addresses the related issues of unbalances, harmonics and neutral current in a typical airport power distribution network. Efforts have been made to estimate the required size of the neutral conductor given the ratings of various loads in the distribution system. The lighting load has been modeled (i) as an incandescent lamp controlled by a power electronic controller (ii) as a fluorescent lamp having an electronic ballast as the starter and being controlled by an AC voltage controller. It is found that the neutral current flow is about 300% of the full-load current rating when the lighting system is being controlled by a constant current controller. The paper explores two solution methodologies namely, application of zigzag transformer and application of star delta transformer along with a single phase active filter, for reducing the neutral current. The relative merits and demerits of these proposed solutions have been brought out.
机场配电网络有许多非线性和单相负载,这些负载会导致不平衡,即使在正常运行条件下,中性导体中也会产生大量电流。恒流控制器控制的照明负荷对机场配电系统的电能质量产生不利影响。本文讨论了典型机场配电网的不平衡、谐波和中性电流的相关问题。在给定配电系统中各种负载的额定值的情况下,已经作出了估计中性导体所需尺寸的努力。照明负载被建模为(i)由电力电子控制器控制的白炽灯(ii)具有电子镇流器作为启动器并由交流电压控制器控制的荧光灯。研究发现,当采用恒流控制器控制照明系统时,中性电流流量约为满载额定电流的300%。本文探讨了减小中性点电流的两种解决方法,即采用之字形变压器和采用星形三角形变压器加单相有源滤波器。提出了这些解决方案的优缺点。
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引用次数: 0
Isolated Asynchronous Generator in Wind Generation Feeding Dynamic Loads 风力发电动态负载隔离异步发电机
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615618
S. Sharma, Bhim Singh
This paper deals with investigation on the performance of voltage and frequency controller (VFC) of a wind power generation using a capacitor excited isolated asynchronous generator (IAG) feeding dynamic loads. The amplitude of load currents is estimated using the low pass filter to control the voltage and frequency of IAG system. Three-leg voltage source converter (VSC) with a battery energy storage system (BESS) and non-isolated T-connected transformer is used as a VFC. The proposed VFC works as a voltage regulator, a load leveler, a load balancer and a harmonic eliminator. The wind power driven IAG system is modeled and simulated in the MATLAB using Simulink and sim power system (SPS) toolboxes.
本文研究了用电容励磁隔离异步发电机(IAG)馈电动态负载的风力发电机的电压频率控制器(VFC)的性能。利用低通滤波器估计负载电流的幅值,控制IAG系统的电压和频率。采用带电池储能系统(BESS)和非隔离t型连接变压器的三腿电压源变换器(VSC)作为VFC。所提出的VFC可作为电压调节器、负载均衡器、负载平衡器和谐波消除器。利用Simulink和sim power system (SPS)工具箱,在MATLAB中对风力驱动的IAG系统进行了建模和仿真。
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引用次数: 2
Reliability of Example Mechanical Systems for Data Center Cooling Selected by Tier Classification 用分级法选择数据中心制冷机械系统示例的可靠性
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5616041
R. Arno, Gardson Githu, P. Gross, R. Schuerger, Scott Wilson
This is the second paper of a series on data center design. The first paper "Reliability of Example Data Center Designs Selected by Tier Classifications," presented at the 2010 I&CPS Conference addressed electrical designs. This paper will discuss the reliability of the mechanical cooling systems that would be required for data centers with similar designs to the examples used in the previous paper. The review of the metrics of reliability engineering from the first paper will also be included. The data center industry has come to rely on "tier classifications" as presented in a number of papers by the Uptime Institute [1] as a gradient scale of data center configurations and requirements from least (Tier 1) to most reliable (Tier IV). This paper will apply the principles and modeling techniques of reliability engineering to specific examples that were selected based on gradient scale provided by the Tier Classifications and discuss the results.
本文是关于数据中心设计的系列文章中的第二篇。在2010年I&CPS会议上发表的第一篇论文“通过层分类选择的示例数据中心设计的可靠性”讨论了电气设计。本文将讨论与前一篇文章中使用的示例设计相似的数据中心所需的机械冷却系统的可靠性。对第一篇论文中可靠性工程指标的回顾也将包括在内。数据中心行业已经开始依赖于Uptime Institute[1]的许多论文中提出的“层分类”,作为数据中心配置和要求的梯度尺度,从最低(第1层)到最可靠(第4层)。本文将把可靠性工程的原理和建模技术应用于基于层分类提供的梯度尺度选择的具体示例,并讨论结果。
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引用次数: 4
Low Level Ionic Current Sensing Micro-Tip 低水平离子电流传感微针尖
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615300
S. Memon, W. Balachandran
Many of the existing fingerprint biometric sensors have limitations with regard to liveness detection. At Brunel University research is being pursued with a view to developing novel fingerprint sensor based on micro/nano technology. In this paper, we report work in progress of a micro sensor capable of detecting ionic activity of sweat pores on a finger ridge. The multi-physics modeling software (COMSOL) was used to create an electrical model of the sensor and its response to charge coupling in conducting liquid was simulated. The experimental results obtained under various operating conditions agreed well with the simulation results.
许多现有的指纹生物识别传感器在活体检测方面存在局限性。布鲁内尔大学正在进行研究,以期开发基于微纳米技术的新型指纹传感器。在本文中,我们报告了一种能够检测手指脊上汗孔离子活性的微型传感器的工作进展。利用多物理场建模软件COMSOL建立了传感器的电学模型,并模拟了传感器对导电液体中电荷耦合的响应。不同工况下的实验结果与仿真结果吻合较好。
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引用次数: 0
Financial Analysis of a Large Scale Photovoltaic System and Its Impact on Distribution Feeders 大型光伏系统的财务分析及其对配电网的影响
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5615954
Chia-Hung Lin, W. Hsieh, Chao-Shun Chen, T. Ku, C. Tsai
To promote the PV installation, a large scale photovoltaic (PV) system installed in the Main Stadium of the 2009 World Games has been investigated for the design of selling price of PV power generation. The PV power generation is simulated according to the hourly solar irradiation and temperature provided by the weather bureau. The cash flow of annual power generation, the O&M cost and the capital investment cost of the PV system is then used to derive the payback years and the internal rate of return for the PV system under different selling price of PV power generation. The voltage variation and the power system loss of the distribution feeder which serves the Main Stadium are also performed by executing the 3-φ load flow analysis for the impact analysis of the PV system. The results indicate that the reduction of voltage drop and power system loss can be obtained with the PV system installed to provide the dispersed generation for the local loads. However, the PV system penetration is limited due to the violation of voltage variation introduced by the large intermittent PV power generation. The selling price of PV generation has to be designed according to the conditions of solar irradiation and temperature so that sufficient incentives can be provided to encourage more customers to participate the PV program.
为推广光伏发电,对2009年世界运动会主体育场安装的大型光伏发电系统进行了光伏发电销售价格设计研究。光伏发电根据气象局提供的每小时太阳辐照度和温度进行模拟。然后利用光伏发电的年发电现金流、运维成本和资金投资成本,推导出不同光伏发电销售价格下光伏发电系统的投资回收期和内部收益率。通过对光伏系统进行3-φ潮流分析,对主会场配电馈线的电压变化和电力系统损耗进行分析。结果表明,采用光伏发电系统为局部负荷提供分散发电,可以降低电压降和电力系统损耗。然而,由于大规模的间歇性光伏发电带来的电压变化违规,光伏系统的渗透率受到限制。光伏发电的销售价格必须根据太阳照射和温度的情况来设计,这样才能提供足够的激励,鼓励更多的客户参与到光伏项目中来。
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引用次数: 58
Optimizing Safety and Efficiency in the Mining Industry 优化矿业安全与效率
Pub Date : 2010-11-01 DOI: 10.1109/IAS.2010.5616002
J. C. Warren, S. Shahroozi
This paper discuss the optimization of safety, schedule efficiency and cost effectiveness of delivering projects for the mining industry through implementation of pre-assemblies and modularization. This approach helps with reduction of the required on-site labor force by transferring a portion of the required effort-hours off-site. Projects in the mining industry are typically remotely located and therefore require additional effort hours dedicated to building workforce accommodations, camps and associated support infrastructures. All the required additional efforts combined with the project's remote location tends to impose additional constraints on safety, productivity and project delivery schedule.
本文讨论了通过实施预装配和模块化来优化采矿业交付项目的安全性、进度效率和成本效益。这种方法通过将一部分所需的工作时间转移到场外,帮助减少所需的现场劳动力。采矿业的项目通常位于偏远地区,因此需要额外的工作时间来建造劳动力住宿、营地和相关的支持基础设施。所有需要的额外工作,加上项目的远程位置,往往会对安全性、生产力和项目交付时间表施加额外的限制。
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引用次数: 0
期刊
2010 IEEE Industry Applications Society Annual Meeting
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