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2014 International Conference on Advances in Electrical Engineering (ICAEE)最新文献

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Investigation on mixed insulating fluids with nano fluids and antioxidants 纳米流体与抗氧化剂混合绝缘液的研究
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838453
P. Krishna Kumar, S. Senthil Kumar, M. Ravindran
In the whole world the electricity plays a major role today. The important component in the power system is the transformer which is composed of solid and liquid insulation. Insulating fluids used in transformer decides the efficiency of transformer. Today we use mineral oil as insulating fluid but due to the increase in need of electricity the scarcity of mineral oil exist. The sudden replacement of mineral oil with other liquid is somewhat difficult for the researcher. First the natural ester and the silicone oil has the greatest disadvantage of high viscosity. In this paper an effort has been made to find the alternative solution with the concept of mixed insulating fluids. The paper also concluded with enhancing the critical parameters such as breakdown voltage, flash and fire point of individual and mixed insulating fluid with the suitable additives of nano material and antioxidants. For investigation mineral oil, sunflower oil, Rice bran oil and silicone oil are chosen. The critical parameters to be analyzed are flash point, fire point, viscosity and breakdown voltage.
在当今世界,电力扮演着重要的角色。变压器是电力系统的重要组成部分,它由固体和液体绝缘组成。变压器绝缘液的使用决定了变压器的工作效率。今天我们使用矿物油作为绝缘液,但由于电力需求的增加,矿物油的稀缺性存在。突然用其他液体代替矿物油对研究人员来说有些困难。首先天然酯和硅油最大的缺点是粘度高。本文尝试用混合绝缘流体的概念寻找替代方案。适当添加纳米材料和抗氧化剂,可以提高单独绝缘液和混合绝缘液的击穿电压、闪点和着火点等关键参数。研究选用矿物油、葵花籽油、米糠油和硅油。需要分析的关键参数有闪点、着火点、粘度和击穿电压。
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引用次数: 12
A simple load flow method for radial distribution system 径向配电系统的一种简单潮流法
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838529
S. Mandava, V. Ramesh, P. Karthikeyan
The radial network is the one which passes through the network without any connection to other supply. It is used for isolated loads like rural areas. Different forward-backward sweep algorithms exist for the load flow analysis of radial distribution systems. A new method of load flow analysis for radial distribution system is explained in this paper. This method is worked out by considering voltage independent loads and voltage dependency loads. The voltage profile results of the proposed method are compared with ratio flow method. Adequate simulations are performed by using Matlab.
径向电网是一种不与其他电源连接而穿过电网的电网。它用于孤立的负载,如农村地区。针对径向配电系统的潮流分析,存在不同的正向-反向扫描算法。本文介绍了一种新的径向配电系统潮流分析方法。该方法考虑了电压无关负载和电压相关负载。将该方法的电压分布结果与比例流法进行了比较。利用Matlab进行了充分的仿真。
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引用次数: 3
Simulation of solar based DC-DC converter for armature voltage controlled separately excited motor 电枢压控分励电机太阳能DC-DC变换器仿真
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838539
S. Jayaprakash, V. Ramakrishnan
This paper presents a Solar based DC-DC converter for armature voltage controlled separately excited motor. The circuit has two full wave converter connected to boost the voltage and also for the power factor correction (PFC) converters. That the two full wave converter is controlled by MOSFET. Output side of Controlled converter is connected to pi filter. Finally separately excited motor is connected to output side. Controlled voltage is applied to the armature of the motor. Speed of motor, Torque and Armature current are measured by experimental. The circuit with all the component parameters operate at zero-voltage switching which retains the high circuit efficiency. A circuit operation and simulation designed for a 220v dc output arrived and tested.
本文介绍了一种基于太阳能的电枢压控分励电动机DC-DC变换器。该电路有两个全波转换器连接到升压和功率因数校正(PFC)转换器。两个全波变换器由MOSFET控制。受控变换器的输出侧连接pi滤波器。最后分别励磁电机连接到输出侧。控制电压加在电机的电枢上。通过实验测量了电机转速、转矩和电枢电流。该电路的所有元件参数都在零电压开关下工作,保持了较高的电路效率。为220v直流输出设计的电路操作和仿真已经完成并进行了测试。
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引用次数: 2
Performance optimization of tunable standing wave thermoacoustic engine by varying the stack parameters and resonator length: An experimental study 可调谐驻波热声发动机性能优化的实验研究
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838468
Harshal Agarwal, K. Akhil, Vishnu R Unni, N. Ravi, R. Sujith, S. Iqbal, B. Pesala
Thermoacoustic heat engine (TAHE) converts thermal power (heat) into acoustic power. TAHE has been gaining significant interest because of its non-fuel specific, low cost and high reliability (due to reduced moving parts) compared to conventional IC engines. The performance of TAHE depends upon the various parameters such as stack position, stack length and resonator length. Previously, we built a fixed TAHE which converts heat energy to electrical energy with an efficiency of 2 %. However, the performance of the fixed engine was not fully optimized. To investigate further, another novel tunable TAHE has been built with the goal of optimizing the efficiency by tuning three critical parameters, namely stack position, stack length and resonator length. This paper shows the influence of stack parameters (stack position and stack length) and resonator length on the performance of the thermoacoustic heat engine. The performance is measured in terms of the pressure amplitude generated inside the TAHE using air as the working fluid. It is observed that the stack's position considerably affects the performance. Further, from experiments, it is observed that the maximum acoustic power is generated when the stack is positioned closer to a pressure antinode.
热声热机(TAHE)将热能(热)转化为声功率。与传统的IC发动机相比,TAHE因其非燃油特性、低成本和高可靠性(由于减少了活动部件)而备受关注。TAHE的性能取决于各种参数,如堆栈位置、堆栈长度和谐振器长度。之前,我们建造了一个固定的TAHE,它将热能转换为电能,效率为2%。然而,固定发动机的性能并没有得到充分的优化。为了进一步研究,我们构建了另一种新型可调谐TAHE,其目标是通过调整三个关键参数,即堆栈位置,堆栈长度和谐振腔长度来优化效率。本文研究了叠层参数(叠层位置、叠层长度)和谐振腔长度对热声热机性能的影响。性能是根据TAHE内部产生的压力幅值来测量的,TAHE使用空气作为工作流体。可以观察到,堆栈的位置对性能有很大影响。此外,从实验中观察到,当堆叠位置靠近压力反天线时,产生的声功率最大。
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引用次数: 1
Hardware architecture design and mapping of ‘Fast Inverse Square Root’ algorithm “快速平方根反比”算法的硬件架构设计与映射
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838433
Saad Zafar, Raviteja Adapa
The Fast Inverse Square Root algorithm has been used in 3D games of past for lighting and reflection calculations, because it offers up to four times performance gains. This paper presents a hardware implementation of the algorithm on an FPGA board by designing the complete architecture and successfully mapping it on Xilinx Spartan 3E after thorough functional verification. The results show that this implementation provides a very efficient single-precision floating point inverse square root calculator with practically accurate results being made available after just 12 short clock cycles. This performance measure is far superior to the software counterpart of the algorithm, and is not processor dependent like rsqrtss of x86 SSE instruction set. Results of this work can aid FPGA based vector processors or graphic processing units with 3D rendering. The hardware design can also form part of a larger floating point arithmetic unit for dedicated reciprocal square root calculations.
Fast Inverse Square Root算法在过去的3D游戏中用于照明和反射计算,因为它提供了高达四倍的性能提升。本文给出了该算法在FPGA板上的硬件实现,设计了完整的架构,并经过全面的功能验证,成功地将其映射到Xilinx Spartan 3E上。结果表明,该实现提供了一个非常高效的单精度浮点平方根反计算器,只需12个短时钟周期即可获得几乎准确的结果。这种性能度量远远优于该算法的软件对应,并且不像x86 SSE指令集的rsqrtss那样依赖于处理器。这项工作的结果可以帮助基于FPGA的矢量处理器或图形处理单元进行3D渲染。硬件设计也可以构成一个更大的浮点运算单元的一部分,用于专用的倒数平方根计算。
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引用次数: 11
Demand side management based congestion relief model 基于需求侧管理的拥堵缓解模型
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838432
S. Venkatesan, T. S. Manipriya, J. Senthil Kumar
Congestion in the transmission network prevents the implementation of the desired market transaction. This paper proposes a new, simple and effective congestion management scheme, which will meet the objective of ISO (Independent System Operator). To relieve congestion, an auction mechanism for interruptible load has been designed and integrated with congestion relief model. The effectiveness of the proposed method is examined for an ISO operating in a bilateral contract, for the real-time selection of interruptible load offer. The IEEE 30-Bus system and Indian 69-Bus utility Bus systems with considering transactions have been used for validation of various case studies.
传输网络中的拥塞阻碍了预期市场交易的实现。本文提出了一种新的、简单有效的拥塞管理方案,以满足ISO(独立系统操作符)的目标。为了缓解拥塞,设计了可中断负荷的竞价机制,并将其与拥塞缓解模型相结合。以双边合同中运行的ISO为例,验证了该方法在可中断负荷报价实时选择中的有效性。IEEE 30总线系统和印度69总线实用总线系统已被用于各种案例研究的验证。
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引用次数: 1
Fuzzy controller for reduced voltage source multicell converter 低压源多电池变换器的模糊控制
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838492
P. Ponnambalam, P. R. T. Reddy, B. S. Sekhar, B. Kiran
Multilevel converters are the result of growing need for higher power converters. This paper presents a new configuration of stacked multi cell converter using PWM technique controlled by fuzzy logic. The main advantage of this new configuration of stacked multi cell converter in comparison with other multi cell converter is reduced number of DC voltage sources. Here in this paper the number of DC voltage sources is reduced from two to one. We can achieve this by connecting upper stack switches by a common DC voltage source. By increasing the number of levels the ac output with fewer harmonic is achieved. As the number of levels increases the output voltage is improved and simultaneously THD (Total Harmonic Distortion) is reduced. In this paper THD is controlled using MAT LAB/fuzzy logic tool box. The circuit in this paper is simulated using MATLAB/SIMULINK and the results are presented to check the effectiveness of the converter and its control.
多电平变换器是高功率变换器需求增长的结果。本文提出了一种采用模糊逻辑控制的PWM技术的叠置多单元变换器的新结构。与其他多单元变换器相比,这种新型堆叠多单元变换器的主要优点是减少了直流电压源的数量。本文将直流电压源的数量从两个减少到一个。我们可以通过一个公共直流电压源连接上层堆叠交换机来实现这一点。通过增加电平的数量,实现了谐波更少的交流输出。随着电平数的增加,输出电压得到改善,同时总谐波失真(THD)降低。本文采用MAT LAB/模糊逻辑工具箱对THD进行控制。利用MATLAB/SIMULINK对电路进行了仿真,并给出了仿真结果,验证了变换器及其控制的有效性。
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引用次数: 0
Analysis and design of Peak Current controlled IBFC for high power factor and tight voltage regulation 高功率因数、高稳压型峰值电流控制IBFC的分析与设计
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838487
M. Subbarao, C. Sai Babu, S. Satyanarayana, S. S. Kumar
The control technique presented in this paper -Peak Current Mode Control is a simplified power factor correction (PFC) technique for single stage AC/DC converters, By using low cost standard PWM control IC's implementation becomes easy for this controller. In this paper Integrated buck-fly back converter (IBFC) is a single stage AC/DC converter, operating in discontinuous conduction mode (DCM) to achieve high Power factor with fast output voltage regulation. Comparative analysis of Peak current mode controller to hysteresis current controller for 90-230V input, 48V Output and 200W ac-dc converter operating at 100 kHz is presented and MATLAB/SIMULINK is used for implementation and simulation results show the performance improvement of proposed controller.
本文提出的控制技术——峰值电流模式控制是一种简化的单级AC/DC变换器功率因数校正(PFC)技术,通过使用低成本的标准PWM控制IC,使该控制器易于实现。集成buck-fly - back变换器(IBFC)是一种单级AC/DC变换器,工作在断续导通模式(DCM)下,以实现高功率因数和快速输出电压调节。对输入90-230V、输出48V、工作频率为100khz的200W交直流变换器的峰值电流模式控制器与滞回电流控制器进行了对比分析,并利用MATLAB/SIMULINK进行了实现,仿真结果表明所提控制器的性能有所提高。
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引用次数: 3
Regulated voltage operation of a stand-alone 3-Ø self-excited induction generator 单机3-Ø自励感应发电机稳压运行
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838501
K. Subramanian, S. P. Sabberwal
This paper describes the performance of a wind driven 3-Ø self-excited induction generator (SEIG) terminal voltage regulation with thyristor switched reactor (TSR) and voltage source inverter (VSI) for a stand-alone mode. Generated voltage magnitude and frequency of SEIG is varies as soon as load and wind velocity changed. A reduced VA rating of a 3-Ø VSI suggested and implemented to control the system frequency. Since, SEIG is a resonance generator, may lost the resonant condition as soon as frequency and reactance of the system varies. Therefore, in order to retain the resonant condition; TSR technique is used to compensates the changing reactances against full-load capacitance connected across the stator terminals of the generator. A prototype controller designed and implemented in laboratory model of SEIG and tested. The results are presented.
本文介绍了采用晶闸管开关电抗器(TSR)和电压源逆变器(VSI)的风力发电3-Ø自励感应发电机(SEIG)在单机模式下的终端调压性能。随着负荷和风速的变化,SEIG产生的电压幅值和频率也发生变化。建议并实施降低了3-Ø VSI的额定电压来控制系统频率。由于SEIG是谐振发生器,一旦系统的频率和电抗发生变化,就可能失去谐振状态。因此,为了保持共振状态;TSR技术用于补偿发电机定子两端连接的满载电容对电抗变化的影响。在SEIG实验室模型上设计并实现了原型控制器,并进行了测试。并给出了实验结果。
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引用次数: 0
Economic load dispatch including wind power using Bat Algorithm 基于Bat算法的风电经济负荷调度
Pub Date : 2014-06-19 DOI: 10.1109/ICAEE.2014.6838546
J. Jose
This paper presents an efficient and reliable solution of economic load dispatch (ELD) using Bat (BA) Algorithm. The objective of the problem is to minimize cost of power generation while meeting operating constraints. As the wind energy is growing renewable energy source, it is necessary to include wind energy conversion system generators in the economic load dispatch problems. The stochastic nature of wind power output and the imbalance charges such as over estimation cost and under estimation cost due to forecasting errors of wind are taken into account. The feasibility of the proposed algorithm is demonstrated for six unit and fifteen unit thermal system with and without wind power and the results are compared with PSO.
本文利用Bat (BA)算法提出了一种高效可靠的经济负荷调度方法。该问题的目标是在满足运行约束的情况下使发电成本最小化。随着风能日益成为可再生能源,有必要将风能转换系统中的发电机组纳入经济负荷调度问题。考虑了风电输出的随机性,以及由于风电预测误差导致的成本过高和成本过低等不平衡费用。对6机组和15机组热力系统进行了可行性验证,并与粒子群算法进行了比较。
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引用次数: 18
期刊
2014 International Conference on Advances in Electrical Engineering (ICAEE)
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