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2015 International Conference on Power, Instrumentation, Control and Computing (PICC)最新文献

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GSM based digital door lock security system 基于GSM的数字门锁安全系统
Adnan Ibrahim, Afhal Paravath, P. Aswin, S. M. Iqbal, Shaeez Usman Abdulla
This paper discusses the design and implementation of a GSM based digital door lock security system using PIC platform. A 5-digit password was used to lock/unlock the doors by employing a gear motor. Three consecutive unsuccessful attempts in entering the correct password results in sending a warning message, was sent to preset mobile numbers, as a means of detecting unauthorized intrusion. A 3D scaled model of a house with door controlled by a gear motor was constructed to implement and demonstrate the proposed system. A separate arrangement was made to install the control. The experimental result and analysis were promising.
本文讨论了一种基于GSM的基于PIC平台的数字门锁安全系统的设计与实现。一个5位数的密码被用来用齿轮马达锁/解锁门。连续三次输入正确密码失败,系统会向预设的流动电话号码发出警告讯息,以侦测未经授权的入侵。建立了一个由齿轮电机控制的带门的房屋的三维比例模型来实现和演示所提出的系统。另作安排安装控制装置。实验结果和分析是有希望的。
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引用次数: 26
Analysis of power oscillation damping capability of STATCOM-POD and optimal placement of PMUs in IEEE-14 bus system IEEE-14总线系统中STATCOM-POD的功率振荡阻尼能力分析及pmu的优化配置
R. Visakhan, R. Rahul, K. Hridya, A. Kurian
The main issue considering power system security is how to reduce the overshoot and have better rate of damping of power system oscillations. Generally, Power System Stabilizer (PSS) are used for power system oscillation damping, but inter area oscillations are not effectively damped with PSS, so Flexible ac transmission system (FACTS) devices with supplementary controller are used for effective damping of power system oscillations. For performance analysis the results of eigenvalue analysis and Time domain simulation results are compared for results validation. The controllers such as power oscillation damper and power system stabilizer are tuned according to eigenvalue analysis by considering system stability. The main objective is to reduce the peak overshoot and settling time of inter area oscillations thereby improving power system stability. The optimal placement of phasor measurement units (PMUs) are also done through annealing optimization technique and results of annealing methods are validated using system observability index. Analysis of static synchronous compensator with power oscillation damper (STATCOM-POD) in terms of power oscillation damping is carried out for different case studies such as A three phase short circuit fault, line outage and load contingency. The proposed works are simulated on an IEEE 14 bus standard test system. The test system for the proposed work is modeled and simulated using MATLAB/PSAT. Results shows that by proper tuning of POD with FACTS controllers the power oscillations are damped faster than conventionally used PSS and by the optimal placement of PMUs, the cost of installation of PMUs can be reduced to great extent.
如何减小超调量,使电力系统振荡具有较好的阻尼率,是考虑电力系统安全性的主要问题。通常使用电力系统稳定器(PSS)来抑制电力系统的振荡,但PSS不能有效地抑制区域间振荡,因此采用带补充控制器的柔性交流输电系统(FACTS)装置来有效地抑制电力系统的振荡。在性能分析方面,将特征值分析结果与时域仿真结果进行了比较,对结果进行了验证。在考虑系统稳定性的基础上,根据特征值分析对功率振荡阻尼器和电力系统稳定器等控制器进行了调谐。其主要目的是减少区域间振荡的峰值超调量和稳定时间,从而提高电力系统的稳定性。采用退火优化技术对相量测量单元(pmu)进行了优化布置,并利用系统可观测性指标对退火方法的结果进行了验证。针对三相短路故障、线路中断和负荷偶发等不同情况,对功率振荡阻尼器静态同步补偿器(STATCOM-POD)进行了功率振荡阻尼分析。在ieee14总线标准测试系统上进行了仿真。采用MATLAB/PSAT软件对该测试系统进行了建模和仿真。结果表明,通过使用FACTS控制器对POD进行适当的调谐,可以比传统的PSS更快地抑制功率振荡,并且通过优化pmu的放置,可以在很大程度上降低pmu的安装成本。
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引用次数: 2
A novel control method for voltage regulation and island detection of a DC microgrid connected photo voltaic converter system 一种新型的直流微网光伏变换器电压调节与孤岛检测控制方法
K. Anoop, M. Nandakumar
This paper presents maximum power point tracking, bus voltage regulation and island detection of a photo voltaic panel using One Cycle Control (OCC). The power generation by renewable energy sources depends highly on atmospheric conditions and due to that they are very chaotic in nature. Hence rapid control becomes an essential requirement for the converters used for power conditioning. Conventionally PI controller is used for the control of power electronic circuits employed in such systems. But PI controller takes few switching cycles to track the variations in operating conditions while the OCC can track them within one switching cycle. Moreover compared to PI, OCC has a better transient response. Short current pulse based maximum power point tracking is used here. An island mode detection based on input current perturbation is also explained. MATLAB/Simulink simulation results demonstrate the performance of OCC.
本文介绍了利用单周期控制(OCC)实现光伏板最大功率点跟踪、母线电压调节和孤岛检测的方法。可再生能源的发电高度依赖于大气条件,因此它们在本质上是非常混乱的。因此,快速控制成为用于电力调节的变流器的基本要求。传统上,PI控制器用于控制在这种系统中使用的电力电子电路。但是PI控制器需要很少的切换周期来跟踪工作条件的变化,而OCC可以在一个切换周期内跟踪它们。此外,与PI相比,OCC具有更好的瞬态响应。本文采用基于短电流脉冲的最大功率点跟踪。本文还介绍了一种基于输入电流扰动的岛模检测方法。MATLAB/Simulink仿真结果验证了OCC的性能。
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引用次数: 1
Power quality improvement using self-supported Dynamic Voltage Restorer (DVR) in distribution system 利用自支撑式动态电压恢复器改善配电系统电能质量
T. Archana, P. Reji
In this paper a new control algorithm for self-supported Dynamic Voltage Restorer (DVR) is analysed. DVR is used to mitigate the power quality problems in terminal voltage like voltage sag, swell, harmonics etc. Here two PI (Proportional Integrator) controllers are used for regulating the DC bus voltage and the load voltage. The focus of this paper is to reduce the active power injected by DVR. Synchronous Rotating Frame (SRF) theory is used to extract the fundamentals of terminal voltage and reference voltage is genereted. The error between sensed load voltage and reference load voltage is used to generate the control signal for the DVR. The compensation of voltage sag, swell, harmonics is evaluated using the Self-supported DVR. The DVR has been modelled using MATLAB software with its Simulink and Sim-power system (SPS) block set tool boxes.
本文分析了一种新的自支撑式动态电压恢复器控制算法。DVR用于缓解终端电压中的电压凹陷、膨胀、谐波等电能质量问题。这里两个PI(比例积分器)控制器用于调节直流母线电压和负载电压。本文的研究重点是如何降低DVR系统的有功功率。利用同步旋转框架(SRF)理论提取终端电压的基本原理,生成参考电压。利用检测到的负载电压与参考负载电压之间的误差产生DVR的控制信号。利用自持式DVR对电压暂降、膨胀、谐波的补偿进行了评估。利用MATLAB软件及其Simulink和Sim-power系统(SPS)模块集工具箱对DVR进行了建模。
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引用次数: 2
Reducing the transient active power from diesel generator using flywheel energy storage system in isolated wind-diesel hybrid power system 采用飞轮储能系统降低隔离型风-柴油混合动力系统中柴油发电机暂态有功功率
S. Sujith, V. Ramesh
The paper describes the application of a flywheel energy storage system (FESS) for reducing the diesel energy consumption during the post high wind transient period in an isolated wind-diesel hybrid power system. The combination of Diesel Generator(DG) with Wind Generator (WG) ensures that there will be continuous supply of active power to the system and can be effectively utilised for critical power applications. However, the diesel power is neither economical nor environmental friendly in an already installed WDHS. And thus the priority should be to reduce its dependence of power without compromising on continuous power supply. Flywheel based energy storage system is highly effective for the specified mission, especially for locations which suffers from high wind speed oscillations. The paper describes the specified applications of FESS and the system is validated using Matlab /Simulink software. The simulation results show that the peak overshoot of the power from DG reduced by 21 % and the DG power reduces by over 35%, typically, during the said transition interval.
介绍了飞轮储能系统(FESS)在隔离型风-柴油混合动力系统高风期后暂态期间降低柴油机能耗的应用。柴油发电机(DG)与风力发电机(WG)的组合确保系统将有持续的有功电力供应,并可有效地利用于关键的电力应用。然而,柴油动力既不经济也不环保,在一个已经安装的水处理系统。因此,当务之急应该是在不影响持续供电的情况下减少对电力的依赖。基于飞轮的储能系统对于特定的任务是非常有效的,特别是在遭受高风速振荡的地方。本文介绍了FESS的具体应用,并用Matlab /Simulink软件对系统进行了验证。仿真结果表明,在上述过渡期间,DG功率的峰值超调通常降低了21%,DG功率降低了35%以上。
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引用次数: 3
Suboptimal control of singularly perturbed multiparameter discrete control system 奇摄动多参数离散控制系统的次优控制
G. Babu, M. S. Krishnarayalu
Study of a generalized problem is very important in the sense it provides complete picture of the problem. Accordingly a generalized singularly perturbed multiparemter discrete control system is considered. An open-loop optimal control problem based on Pontriagin's Minimum Principle (PMP) is formulated. The resulting optimal control solution needs special numerical techniques as the system is highly stiff due to multitime scale nature of the system with n small parameters. Hence it is proposed to go for a suboptimal controller that mitigates this problem. Singular Perturbation Method (SPM) that reduces the order and removes the stiffness of the system is an ideal choice for this problem. Here a generalized SPM is presented for this multiparameter problem. The SPM consists of an outer, n initial boundary layer correction (BLC) solutions and n terminal BLC solutions for this problem. An example is provided. The numerical results substantiate the proposed suboptimal controller.
研究广义问题是非常重要的,因为它提供了问题的全貌。据此,研究了广义奇摄动多参数离散控制系统。提出了一个基于Pontriagin最小原理的开环最优控制问题。由于系统具有n个小参数的多时间尺度特性,系统具有高度的刚性,因此得到的最优控制解需要特殊的数值技术。因此,建议采用次优控制器来缓解这一问题。奇异摄动法(SPM)降低了系统的阶数,消除了系统的刚度,是解决这一问题的理想选择。本文提出了多参数问题的广义SPM方法。SPM由一个外部、n个初始边界层修正(BLC)解和n个终端边界层修正解组成。提供了一个示例。数值结果证实了所提出的次优控制器。
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引用次数: 6
DTC of four switch three phase inverter fed induction motor drive using artificial neural network 采用人工神经网络实现四开关三相逆变器馈电异步电动机的直接转矩驱动
C. Ashfak, A. Hareesh
This paper presents direct torque control (DTC) scheme for an induction motor (IM) fed from four switch three phase inverter (FSTPI) using simple structured artificial neural network for switching vector selection and is conceived to be a commercially viable solution having low cost, high efficiency and robustness. By comparing the proposed scheme with conventional DTC for IM fed from six switch and four switch three phase inverter shows interesting performance. Space vector pulse width modulation (SVPWM) is the best technique in comparison with pulse width modulation (PWM) or sinusoidal pulse width modulation (SPWM) because of its lesser total harmonic distortion, wider linear modulation range, their easier digital realization and better DC bus utilization for obtaining the switching voltage vectors. Simulation results show the validity of the proposed scheme.
本文提出了一种采用简单的结构化人工神经网络进行开关矢量选择的四开关三相逆变器(FSTPI)异步电动机直接转矩控制(DTC)方案,该方案具有低成本、高效率和鲁棒性,是一种商业上可行的解决方案。通过与传统的六开关和四开关三相逆变器的直接转矩控制进行比较,得到了令人满意的性能。空间矢量脉宽调制(SVPWM)由于其总谐波失真较小、线性调制范围较宽、易于数字化实现和更好地利用直流母线获取开关电压矢量,是与脉宽调制(PWM)或正弦脉宽调制(SPWM)相比的最佳技术。仿真结果表明了该方案的有效性。
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引用次数: 0
Enhancement of HVDC transmission system stability using bidirectional buck boost inverter 利用双向降压升压逆变器增强高压直流输电系统稳定性
K. P. Sari, K. Chandrabose
HVDC transmission technology is an efficient alternative for bulk power transmission over long distances and is used for subsea electrical transmission and interconnection of asynchronous ac grids. Converters play an important role in HVDC transmission systems. Here a Bidirectional Buck Boost Inverter based HVDC (BBI-HVDC) transmission system is presented. The output voltage and current of the new inverter is purely sinusoidal. The Buck boost inverter based HVDC system with sliding mode controller is simulated and studied through Matlab/Simulink. Analysis of the system is carried out during normal operating conditions, ac side faults and dc side faults. The ability of the proposed controller to track the reference active power has been proved. The results show the promising performance of the BBI-HVDC system.
高压直流输电技术是长距离大容量电力传输的有效替代方案,用于海底电力传输和异步交流电网的互连。变流器在高压直流输电系统中起着重要的作用。本文提出了一种基于双向降压升压逆变器的高压直流输电系统。新型逆变器的输出电压和电流是纯正弦的。利用Matlab/Simulink对基于Buck升压逆变器的滑模控制高压直流系统进行了仿真研究。对系统在正常运行条件下、交流侧故障和直流侧故障进行了分析。实验证明了该控制器具有跟踪参考有功功率的能力。结果表明,该系统具有良好的性能。
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引用次数: 4
Speaker identification and verification of noisy speech using multitaper MFCC and Gaussian Mixture models 使用多锥度MFCC和高斯混合模型的说话人识别和噪声语音验证
Dominic Mathew
The two major applications of speaker recognition applications are speaker verification and speaker identification. But in most of the cases the signal is corrupted with background interferences such as noise and echo. This paper proposes the method of speaker recognition and identification after the noise separation. Support Vector Machine(SVM) classification based signal separation is adopted here. MFCC and Multitaper MFCC are used for feature extraction. Despite having low bias, MFCC has large variance. One promising technique for reducing the variance is to replace Hamming windowed spectrum with a multi-taper spectrum estimate. Gaussian Mixture models along with Universal Background Model(UBM) is used for speaker verification and identification tasks.
说话人识别的两大应用是说话人验证和说话人身份识别。但在大多数情况下,信号会受到背景干扰,如噪音和回声的干扰。本文提出了一种基于噪声分离的说话人识别方法。本文采用基于支持向量机(SVM)分类的信号分离方法。使用MFCC和多锥MFCC进行特征提取。MFCC虽然偏倚低,但方差较大。一种很有前途的减小方差的技术是用多锥谱估计代替汉明窗谱。使用高斯混合模型和通用背景模型(UBM)对说话人进行验证和识别。
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引用次数: 15
A novel technique for optimization of power systems implemented in Simulink (case study: Multi-area frequency control) 在Simulink中实现的电力系统优化新技术(以多区域频率控制为例)
M. Bayati, A. Salmani, M. Abedi, G. Gharepetian
Simulink and Code environments are available in Matlab software to simulate a power system. In spite of less flexibility, Simulink is a user-friendly environment and is often easier than Code to use. To examine stability of the power system and design appropriate controllers in Simulink, researchers must have great knowledge about modern and conventional control theories. The power system may be unstable, if the parameters of the controllers are not be adjusted well. When the system becomes more complicated, finding the parameter values, which lead to the stability, becomes harder, even for expert users. This problem happens commonly, especially for control and robotics engineers. This paper proposes a novel technique to find the optimum values of the adjustable parameters (especially the parameters of the controllers) without any knowledge about control theories, when the power system has been implemented using Simulink.
Matlab软件提供Simulink和Code环境对电力系统进行仿真。尽管灵活性较差,但Simulink是一个用户友好的环境,通常比Code更容易使用。为了在Simulink中检测电力系统的稳定性并设计合适的控制器,研究人员必须具有丰富的现代和传统控制理论知识。如果控制器的参数调整不好,电力系统可能会不稳定。当系统变得更加复杂时,即使对专家用户来说,找到导致稳定性的参数值也变得更加困难。这个问题经常发生,特别是对于控制和机器人工程师。本文提出了一种在不需要任何控制理论知识的情况下,利用Simulink实现电力系统可调参数(特别是控制器参数)的最优取值的新方法。
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引用次数: 3
期刊
2015 International Conference on Power, Instrumentation, Control and Computing (PICC)
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