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2011 International Conference on Energy, Automation and Signal最新文献

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Least square and Instrumental Variable system identification of ac servo position control system with fractional Gaussian noise 带分数高斯噪声的交流伺服位置控制系统的最小二乘与仪器变量辨识
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147165
Saptarshi Das, Abhishek Kumar, Indranil Pan, Anish Acharya, S. Das, Amitava Gupta
In this paper, the classical Least Square Estimator (LSE) and its improved version the Instrumental Variable (IV) estimator have been used for the identification of an ac servo motor position control system. The data for system identification has been collected from a practical test set-up for fixed command on the final angular position of the servo motor with varying level of velocity and acceleration. The measured data is corrupted then with externally induced random noise having a Gaussian distribution, commonly known as white Gaussian noise (wGn). Performance of the LSE and IV estimators are also compared for fractional Gaussian noise (fGn) which have heavy tails in its statistical distribution and are capable of modeling real world signals having spiky nature.
本文将经典的最小二乘估计量(LSE)及其改进的工具变量估计量(IV)用于交流伺服电机位置控制系统的辨识。系统辨识的数据是由伺服电机在不同速度和加速度水平下的最终角位置的固定指令的实际测试装置收集的。测量数据被外部诱导的具有高斯分布的随机噪声破坏,通常称为高斯白噪声(wGn)。对于分数高斯噪声(fGn), LSE和IV估计器的性能也进行了比较,分数高斯噪声在其统计分布中具有重尾,并且能够模拟具有尖尖性质的现实世界信号。
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引用次数: 4
Design of CMOS ring oscillator using CMODE 基于CMODE的CMOS环形振荡器设计
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147142
P. Rout, D. P. Acharya
The design of optimal analog and mixed signal (AMS) very large scale integrated circuits (VLSI) with lesser design cycle time is a challenging task for the integrated circuit (IC) designers. Voltage Controlled Oscillator (VCO) is a radio frequency integrated circuit (RFIC) having wide range of applications. This paper presents a new approach to design a ring oscillator (RO) with optimum performance with only one design cycle. The optimal figure of merit performance for a RO with a constraint of achieving a desired centre frequency is observed using a new technique which combines multi-objective optimization with differential evolution (CMODE). The RO is designed by considering the design parameters extracted from constrained CMODE in Cadence Virtuoso analog design environment (ADE) using gpdk090 library. The simulation results are compared with the CMODE predicted indices and are observed to be in good agreement with it. In this work RO circuits with 9 stages of inverters are considered to be designed for 2 GHz centre frequency with the limitations imposed by gpdk090 library. Results of exhaustive simulation and experimental studies for these ROs are presented here to verify the reduced design cycle time and superior performance offered by the proposed design methodology.
以较短的设计周期设计最优的模拟和混合信号(AMS)超大规模集成电路(VLSI)是集成电路设计人员面临的一项具有挑战性的任务。压控振荡器(VCO)是一种应用广泛的射频集成电路(RFIC)。本文提出了一种只用一个设计周期就能设计出性能最优的环形振荡器的新方法。采用一种将多目标优化与差分进化(CMODE)相结合的新技术,观察了以达到期望中心频率为约束的RO的最优性能图。在Cadence Virtuoso模拟设计环境(ADE)中,利用gpdk090库从约束CMODE中提取设计参数,设计RO。将模拟结果与CMODE预测指标进行了比较,结果与CMODE预测指标吻合较好。在这项工作中,考虑在gpdk090库的限制下,将具有9级逆变器的反相电路设计为2 GHz中心频率。本文给出了详尽的仿真和实验研究结果,以验证所提出的设计方法所缩短的设计周期时间和提供的优越性能。
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引用次数: 15
A robust control strategies to improve transient stability in VSC-HVDC based interconnected power systems 基于VSC-HVDC的互联电力系统暂态稳定性鲁棒控制策略
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147186
N. Nayak, S. Routray, P. Rout
This paper presents a robust non linear sliding mode controller(SMC) for VSC-HVDC transmission link in parallel with an AC transmission line connecting a synchronous generator to infinite bus. A non linear sliding mode controller has been proposed to provide voltage support by means of reactive control at both ends; to damp power oscillations and improve transient stability by controlling either active or reactive power, and to control the power flow through the HVDC link. The proposed control scheme is tested under several system disturbances like changes in short-circuit ratio, faults on the converter and inverter buses. Based upon the time domain simulations in MATLAB/SIMULINK environment, the proposed controller is tested and its better performance is shown compare with the PI controllers whose gains are optimized with teaching learning optimization technique. The proposed controller improves voltage stability, damping of power oscillations and transient stability.
针对同步发电机与无限母线连接的交流传输线并联的vdc - hvdc输电链路,提出了一种鲁棒非线性滑模控制器。提出了一种非线性滑模控制器,通过无功控制在两端提供电压支持;通过控制有功或无功功率来抑制功率振荡和提高暂态稳定性,并控制通过HVDC链路的功率流。在短路比变化、变换器和逆变器母线故障等多种系统干扰下,对所提出的控制方案进行了测试。基于MATLAB/SIMULINK环境下的时域仿真,对所提出的控制器进行了测试,并与采用教学优化技术优化增益的PI控制器进行了比较,结果表明所提出的控制器具有更好的性能。该控制器提高了电压稳定性、功率振荡阻尼和暂态稳定性。
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引用次数: 7
Reactive power compensation in inverter-interfaced distributed generation 逆变器接口分布式发电中的无功补偿
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147216
S. Jena, B. Babu, G. Mishra, A. Naik
The consumption of reactive power is stochastic in nature for the distribution system. This uncertain variation of the reactive power leads to 1) Variation of voltage at the point of common coupling(PCC) 2)Low power factor 3)low efficiency 4) improper utilization of distribution system and 5) loss of synchronism for a grid connected inverter based — distributed generation. Now a day's distributed generation (DG) system uses current regulated PWM voltage-source inverters (VSI) for synchronizing the utility grid with DG source in order to ensure the grid stability. In this paper reactive power compensation based hysteresis controller and adaptive hysteresis controller is analyzed for inverter interfaced DG which can control the active and reactive power independently. The adaptive hysteresis controller can reduce the current harmonic at PCC considerably which ensures lower total harmonic distortion (THD). The performance indices include THD of the grid current, fast current tracking during steady state and transient conditions. The studied system is modeled and simulated in the MATLAB Simulink environment.
配电系统的无功功率消耗具有随机性。这种不确定的无功功率变化导致1)共耦合点电压变化(PCC) 2)功率因数低3)效率低4)配电系统利用不当5)基于并网逆变器的分布式发电失去同步。为了保证电网的稳定,目前的分布式发电(DG)系统采用电流调节型PWM电压源逆变器(VSI)实现电网与DG源的同步。本文分析了基于无功补偿的磁滞控制器和基于自适应磁滞控制器的逆变器接口DG有功和无功独立控制。自适应迟滞控制器可以有效地降低PCC电流谐波,从而降低总谐波失真(THD)。性能指标包括电网电流的THD,稳态和暂态状态下的快速电流跟踪。在MATLAB Simulink环境下对所研究的系统进行了建模和仿真。
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引用次数: 5
Design of nonlinear stabilizers for a power system with multiple machines connected to infinite bus 多机连接无限母线的电力系统非线性稳定器设计
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147205
K. Vaisakh, T. Jyothsna, U. C. Patnaik
The main objective of this paper is to investigate the performance of multiple machines connected to a common bus terminal with that of an equalized generator typically, considered in a power system. A detailed analysis of small signal and transient stability has been carried out to study the effectiveness of the systems in the presence of a non-linear controller and a conventional PSS. The performance of the controllers has been evaluated by carrying out the simulation on a five-machine test system for small and large disturbances. Case study shows that intensity of oscillations has reduced much in the case of multiple machines equipped with the non-linear controllers.
本文的主要目的是研究在一个电力系统中,多台机器连接到一个公共总线终端与一个典型的均衡发电机的性能。通过对小信号和暂态稳定性的详细分析,研究了系统在非线性控制器和常规PSS存在下的有效性。通过对五机测试系统进行大小干扰的仿真,对控制器的性能进行了评价。实例研究表明,在多台机器配置非线性控制器的情况下,振动强度大大降低。
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引用次数: 0
A new method of Evolutionary programming in DG planning DG规划中一种新的进化规划方法
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147215
M. Bavafa
Smart grid is a relatively new term that refers to the application of information technology to power systems. Due to the complexity of such systems, the possibilities have yet to be clearly defined. Smart Grid will be a new way to the development of the power network. In the development of Smart Grid, how to integrate the Renewable Energy and the Distributed Generation (DG) safely and reliably is a problem urgent to be solved. Siting and sizing of DG planning in Smart Grid construction are researched in this paper. A multi-objective optimal model is established and normalized in the DG number, location and individual capacity of uncertainty. The improved Evolutionary programming is used to solve this optimization problem. Finally, the validity of the method proposed in the paper is proved by an example.
智能电网是一个相对较新的术语,指的是信息技术在电力系统中的应用。由于这类系统的复杂性,其可能性还有待明确界定。智能电网将是电网发展的新途径。在智能电网的发展过程中,如何安全可靠地将可再生能源与分布式发电相结合是一个亟待解决的问题。研究了智能电网建设中DG规划的选址和规模。建立了多目标优化模型,并对DG数量、位置和个体容量的不确定性进行了归一化。采用改进的进化规划方法求解这一优化问题。最后,通过算例验证了本文方法的有效性。
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引用次数: 7
Modified differential evolution optimization algorithm for multi-constraint optimal power flow 多约束最优潮流的改进差分进化优化算法
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147113
M. Nayak, K. R. Krishnanand, P. Rout
In this paper presents an algorithm for solving optimal power flow problem through the application of a modified differential evolution algorithm(MDE). The objective of an optimal Power Flow(OPF) is to find steady state operation point which minimizes total generating unit (thermal) fuel cost and total load bus voltage deviation from a specified point while maintaining an acceptable system performance in terms of limits on generator real and reactive power outputs, bus voltages, transformer taps, output of various compensating devices and power flow of transmission lines. Differential Evolution (DE) is one of evolutionary algorithms, which has been used in many optimization problems due to its simplicity and efficiency. The proposed MDE is in the framework of differential evolution owning new mutation operator and selection mechanism. To test the efficacy of the algorithm, it is applied to IEEE 30-bus power system with two different objective functions. The optimal power flow results obtained using MDE are compared with other evolutionary methods. The simulation results reveal that the MDE optimization technique provides better results compared to other methods recently published in the literature as demonstrated by simulation results.
本文提出了一种应用改进的差分进化算法求解最优潮流问题的算法。最优潮流(OPF)的目标是找到稳态工作点,使发电机组(热)总燃料成本和总负载母线电压偏离最小,同时在发电机实功率和无功输出、母线电压、变压器分接、各种补偿装置的输出和输电线路的功率流的限制方面保持可接受的系统性能。差分进化算法是进化算法中的一种,以其简单、高效的特点被广泛应用于优化问题中。该模型在差分进化的框架内,具有新的变异算子和选择机制。为了验证该算法的有效性,将其应用于具有两种不同目标函数的IEEE 30总线电力系统。比较了采用MDE方法得到的最优潮流结果。仿真结果表明,MDE优化技术与文献中其他方法相比具有更好的优化效果。
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引用次数: 25
Robust distributed linear parameter estimation in wireless sensor network 无线传感器网络鲁棒分布线性参数估计
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147136
T. Panigrahi, B. Mulgrew, B. Majhi
In a wireless sensor network each sensor node collects scalar measurements of some unknown parameters, corrupted by independent Gaussian noise. Then the objective is to estimate some parameters of interest from the data collected across the network. In this paper a simple iterative robust distributed linear parameter estimation algorithm is proposed where the diffusion co-operation scheme is incorporated. Each node updates its information by using the data collected by it and the information received from the neighbours. When any node fails to transmit correct information to the neighbours and/or the data collected by the node is noisy then the least mean square based diffusion estimation is not accurate. Hence a robust diffusion linear estimation algorithm is proposed here in order to improve the accuracy of the estimation in distributed wireless sensor network.
在无线传感器网络中,每个传感器节点收集一些未知参数的标量测量值,这些参数被独立的高斯噪声破坏。然后,目标是从整个网络收集的数据中估计一些感兴趣的参数。本文提出了一种简单的迭代鲁棒分布线性参数估计算法,其中引入了扩散协同方案。每个节点通过使用自己收集的数据和从邻居接收的信息来更新自己的信息。当任何节点不能向相邻节点传递正确的信息,或者该节点收集的数据有噪声时,基于最小均方的扩散估计就不准确。为此,本文提出了一种鲁棒扩散线性估计算法,以提高分布式无线传感器网络估计的精度。
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引用次数: 11
PSO based location and parameter setting of advance SVC controller with comparison to GA in mitigating small signal oscillations 基于粒子群算法的超前SVC控制器定位与参数设置,并与遗传算法进行了比较
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147126
D. Mondal, A. Chakrabarti, A. Sengupta
This paper aims to select the optimal location and setting parameters of Static VAR Compensator (SVC) controller using Particle Swarm Optimization (PSO) and Genetic Algorithm (GA) to mitigate small signal oscillations in a multimachine power system. Though Power System Stabilizers (PSSs) are prime choice in this issue, its performance gets affected by changes in network configurations, load variations etc. Hence installation of FACTS device, SVC has been suggested here in order to achieve appreciable damping of oscillations. However, performance of any FACTS devices highly depends upon its parameters and suitable location in the power network. In this paper PSO as well as GA based techniques are used to investigate this problem. An attempt has also been made to compare the performance of the PSO based SVC controller with its GA based design. The validity of the proposed techniques is simulated in a multimachine system following two common disturbances. It has been revealed that the PSO based SVC controller is more effective than GA based controller even during critical loading condition.
本文旨在利用粒子群算法和遗传算法对静态无功补偿器(SVC)控制器的最优位置和整定参数进行选择,以减轻多机电力系统中的小信号振荡。虽然电力系统稳定器(pss)是解决这一问题的首选,但其性能会受到网络配置变化、负荷变化等因素的影响。因此,这里建议安装FACTS装置,SVC以获得可观的振荡阻尼。然而,任何FACTS器件的性能在很大程度上取决于其参数和在电网中的合适位置。本文采用粒子群算法和遗传算法对这一问题进行了研究。并将基于粒子群的SVC控制器与基于遗传算法的SVC控制器的性能进行了比较。在一个具有两种常见干扰的多机系统中,对所提方法的有效性进行了仿真。研究表明,即使在临界负载条件下,基于粒子群的SVC控制器也比基于遗传算法的控制器更有效。
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引用次数: 15
Solution to directional relaying for double circuit line 双回路方向继电器的解决方案
Pub Date : 2011-12-01 DOI: 10.1109/ICEAS.2011.6147079
P. Jena, A. Pradhan
Protection of double circuit line is more complex than the single circuit. Problems associated with directional relaying for double circuit line during close-in fault, cross country fault, load change and with high resistance fault are addressed in this paper. Conventional directional relaying algorithm uses fault voltage and current phasors to derive the decisions and thus, finds its limitation during close-in fault, load change and cross country fault. In this work a directional relaying scheme using fuzzy logic system is proposed for protection of the double circuit line. This paper proposes a solution for directional relaying of double circuit line combining four features. The technique is evaluated using data simulated with EMTDC/PSCAD for a double circuit line and the dynamic performance of the algorithm is also studied.
双回线路的保护要比单回线路复杂得多。本文讨论了双回线路定向继电在合闸故障、越野故障、负载变化和高阻故障时的继电问题。传统的定向继电算法采用故障电压和电流相量进行判定,在近距离故障、负荷变化和跨国故障时存在一定的局限性。本文提出了一种基于模糊逻辑系统的双向继电保护方案。本文提出了一种结合四种特点的双回线路定向继电保护方案。利用EMTDC/PSCAD双回线仿真数据对该算法进行了评价,并对算法的动态性能进行了研究。
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引用次数: 9
期刊
2011 International Conference on Energy, Automation and Signal
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