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2021 IEEE International Conference on Automation/XXIV Congress of the Chilean Association of Automatic Control (ICA-ACCA)最新文献

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A non-linear regression model for inertia identification using synchrophasors and Big Data 基于同步量和大数据的惯性识别非线性回归模型
J. Quiroz, I. Soto, Esteban Toledo-Mercado, H. Chávez, Raul Zamorano-Illanes, Jonathan Pereira-Mendoza
This work proposes a model for inertia identification of an electrical power system. A non-linear regression is used from a mathematical model that relates power and frequency variation, obtained from a synchrophasor network. Fitting of the non-linear regressions processed with Big Data, from the PMU and the different real generation contingencies, obtained from the national system operator, are presented.
本文提出了一种电力系统惯性辨识模型。从同步相量网络中获得的功率和频率变化的数学模型中使用非线性回归。本文介绍了用大数据处理的非线性回归的拟合,这些非线性回归来自PMU和来自国家系统运营商的不同实际发电偶然性。
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引用次数: 0
Supervision and control system of a didactic plant in the teaching of industrial automation and control 工业自动化与控制教学中教学装置的监控系统
N. Silva, A. Cervantes, F. Gomes, Reinel Aguedo
This article presents a supervision and automatic control system of the pilot plant present in the Laboratory of Instrumentation, Automation and Control (LIAC) at UACSAUFRPE, aiming to cover the first three levels of the automation pyramid: field devices, control and supervision. The system architecture consists of two reservoirs, a programmable logic controller S7-1200, sensors, actuators, and the Elipse SCADA and Matlab software. The methodology for modeling using experimental identification for the level system is presented applying an input step to the plant, with the data being accessed from the supervisory system by the network through the OPC protocol. With the model obtained, simulation and experimentation results are presented using the Proportional- Integral (PI) control strategy for changes in the reference. Finally, a plant supervision and control system and a human-user interface are developed, allowing supervision of the four process variables: level, temperature, pressure and flow, and the level control in the upper reservoir. In addition, it is possible to manage alarms, historical records and reports, for decision making in failure prevision, maintenance and troubleshooting.
本文介绍了UACSAUFRPE仪器,自动化和控制实验室(LIAC)中试工厂的监督和自动控制系统,旨在涵盖自动化金字塔的前三个层次:现场设备,控制和监督。系统架构包括两个储层,一个可编程逻辑控制器S7-1200,传感器,执行器,以及椭圆SCADA和Matlab软件。采用实验识别方法对液位系统进行建模,将输入步骤应用于工厂,数据由网络通过OPC协议从监控系统访问。根据所建立的模型,采用比例积分(PI)控制策略对参照物的变化进行了仿真和实验。最后,开发了工厂监控系统和人机界面,可以监控四个过程变量:液位、温度、压力和流量,以及上部水库的液位控制。此外,还可以管理警报、历史记录和报告,以便在故障预测、维护和故障排除方面做出决策。
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引用次数: 0
Optimal Nonlinear Regulation of Euler-Lagrange Dynamic Systems 欧拉-拉格朗日动态系统的最优非线性调节
R. Galindo, Y. O. Unufio
A wide variety of methods are used to solve control problems and find optimal control laws that improve the behavior of systems. In this article, a control law is designed for fully actuated dynamic Lagrange systems, that is, systems that have the characteristic that their control input dimension is the same as the dimension of the generalized position vector, beside their parameters are known and their states are known or can be estimated. Canceling part of the dynamics of the system and using the Pontryagin Theorem, a control law is determined that allows the proposed quadratic criterion to be minimized and that ensures the asymptotic stability of the feedback system in the Lyapunov sense. This control law is implemented for optimal regulation, in one of the known problems of optimization of the carriage with the pendulum.
各种各样的方法被用来解决控制问题,并找到改善系统行为的最优控制律。本文设计了完全驱动的动态拉格朗日系统的控制律,即具有控制输入维数与广义位置向量维数相同,且参数已知,状态已知或可估计的系统。利用庞特里亚金定理,抵消系统的部分动力学,确定了一个控制律,使所提出的二次准则最小化,并保证反馈系统在李雅普诺夫意义上的渐近稳定性。该控制律的实现是为了最优调节,在一个已知的问题,车厢的优化与摆。
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引用次数: 0
Variable Structure Control for a Simplified Linear Model of a Wheelchair 轮椅线性简化模型的变结构控制
M. Mineo, Márcia Roberto Covacic, R. Gaino
In this manuscript, a variable structure control strategy is proposed for a simplified linear model which represents a wheelchair commanded by blowing and suction. This model has a proportional and a proportional-integral controller, which were previously included to guarantee stability on the wheelchair. In the simplified model, variations on the parameters of the motors are assumed as polytopic uncertainties, which are considered for the description of the system in state space. Firstly, for a plant ${A(alpha), B(alpha), C}$ an output feedback matrix $G$ and a constant output tandem matrix $F$ were obtained such that the system ${A((x)-B(alpha)GC, B((x), FC}$ is strictly positive real. Then, the variable structure control law is designed for the system. The simulation results show the fast convergence of the state variables, even considering the uncertainties.
本文提出了一种简化线性模型的变结构控制策略,该模型代表了由吹吸指挥的轮椅。这个模型有一个比例控制器和一个比例积分控制器,这两个控制器之前是为了保证轮椅上的稳定性而包含的。在简化模型中,将电机参数的变化假设为多面体不确定性,在状态空间中对系统进行描述。首先,对于一个对象${a (alpha), B(alpha), C}$,得到一个输出反馈矩阵$G$和一个常数输出串联矩阵$F$,使得系统${a ((x)-B(alpha)GC, B((x), FC}$是严格正实数。然后,设计了系统的变结构控制律。仿真结果表明,即使考虑不确定性,状态变量的收敛速度也很快。
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引用次数: 1
Hydrogen technologies and PEM fuel cells: A sustainable alternative for Chile 氢技术和PEM燃料电池:智利的可持续替代方案
Melannie Sepúlveda, E. Baeza, M. Carrillo, Nathalie Risso, J. Rohten
Severe climate change effects along with the increasing need for countries to become independent from fossil fuels are leading countries to seek more sustainable energy sources. This is not an easy task, as many renewables lack the portability and reduced variability which is required to properly satisfy energy demands. In this context, hydrogen technologies are a promising alternative to work towards this goal. This work presents a brief summary on hydrogen technology properties, focusing in particular on the description of hydrogen cells, their characteristics and main applications. Finally, the operation of a PEM cell is simulated using a computer model, in order to illustrate how these tools can be used to further characterize PEM cell performance when designing hydrogen-based solutions.
严重的气候变化影响以及各国越来越需要摆脱对化石燃料的依赖,促使各国寻求更可持续的能源。这不是一项容易的任务,因为许多可再生能源缺乏适当满足能源需求所需的可移植性和可变性。在这种情况下,氢技术是实现这一目标的一个有希望的替代方案。本文简要介绍了氢技术的特点,重点介绍了氢电池的特点和主要应用。最后,使用计算机模型模拟PEM电池的操作,以说明在设计氢基溶液时如何使用这些工具进一步表征PEM电池的性能。
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引用次数: 0
An Effective Approach for Optimal Coordination of Directional Overcurrent Relays Based on Artificial Ecosystem Optimizer 基于人工生态优化器的定向过流继电器优化协调的有效方法
M. Abdelhamid, S. Kamel, M. A. Mohamed, C. Rahmann
In this paper, the artificial ecosystem-based optimization (AEO) algorithm is applied to coordinate directional over current relays (DOCRs). Optimal coordination of DOCRs is non-linear and highly constrained problem but it is important to keep secure and protected power system operation. The AEO algorithm is one of the recent nature-inspired meta-heuristic algorithms. It simulates the flow of energy into an Earth's ecosystem by three living organisms including production, consumption, and decomposition. The AEO is successfully applied to coordinate DOCRs with the aim of minimizing the overall operating time of the relays used in three test systems including 8-bus, 9-bus, and 15-bus systems. The results of the developed algorithm are compared with other well-known algorithms. The simulation results demonstrated the importance and effectiveness of the proposed algorithm in finding the optimal coordination of DOCRs and minimizing the overall operating time of the relays.
本文将基于人工生态系统优化(AEO)算法应用于坐标定向过电流继电器(docr)。docr的优化协调是一个非线性、高约束的问题,但对于保证电力系统的安全运行具有重要意义。AEO算法是近年来自然启发的元启发式算法之一。它模拟了能量通过三种生物体进入地球生态系统的过程,包括生产、消耗和分解。AEO成功地应用于协调docr,目的是最大限度地减少三个测试系统(包括8总线,9总线和15总线系统)中使用的继电器的总体运行时间。将该算法的结果与其他已知算法进行了比较。仿真结果证明了该算法在寻找docr的最佳协调和最小化继电器总体运行时间方面的重要性和有效性。
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引用次数: 4
Optimal Allocation of Multiple Distributed Generations in Radial Distribution Systems Using Levy Flight Distribution Algorithm 基于Levy飞行分配算法的径向配电系统多代分布式优化分配
A. Eid, S. Kamel
In this work, the newly metaheuristic Levy Flight Distribution (LFD) optimization technique is implemented for optimal allocation of distributed generations (DG) in radial distribution systems (RDS). The integration of DGs elevates the performance of the distribution systems. The system performance improvement appears in reducing the power losses and voltage deviation and maximizing the system stability. Different numbers of DGs operating at unity power factor (UPF) and optimal lagging power factor (OLPF) are used to achieve the various objectives. The IEEE 33-bus RDS is used as the test system. The obtained results verify the value of the LFD algorithm for solving the DG allocation problem.
针对径向配电系统中分布式代(DG)的最优分配问题,提出了一种新的元启发式Levy飞行分配优化技术。dg的集成提高了配电系统的性能。系统性能的提高主要表现在减小功率损耗和电压偏差,最大限度地提高系统的稳定性。在单位功率因数(UPF)和最优滞后功率因数(OLPF)下使用不同数量的dg来实现不同的目标。采用IEEE 33总线RDS作为测试系统。所得结果验证了LFD算法在求解DG分配问题中的价值。
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引用次数: 2
Side Channel Attack Countermeasure for Low Power Devices with AES Encryption 采用AES加密的低功耗设备侧信道攻击对策
Nicolás Ruminot-Ahumada, Claudio Valencia-Cordero, Rodrigo Abarzúa-Ortiz
The advancement of Internet of Things produces a massive increase in the use of low-power devices, which can contain sensitive information. Most of these devices do not have the necessary security to protect their information. Therefore, the work aims is analyze and compare countermeasures for SCA in low-power devices with 128-AES encryption. In this scenario, we analyze existing countermeasures and conclude that algorithm-based countermeasures are more suitable for low-power devices. Subsequently, we run a set of tests to understand the scope of CPA attacks and thus establish a countermeasure that is tailored to these devices. Finally, we propose a countermeasure based on byte logic, comparing it with traditional countermeasures of the same type.
物联网的发展导致低功耗设备的使用大幅增加,这些设备可能包含敏感信息。这些设备大多没有必要的安全措施来保护它们的信息。因此,本文旨在分析和比较采用128-AES加密的低功耗器件中SCA的对策。在这种情况下,我们分析了现有的对抗措施,得出基于算法的对抗措施更适合于低功耗设备的结论。随后,我们运行一组测试,以了解CPA攻击的范围,从而建立针对这些设备的对策。最后,我们提出了一种基于字节逻辑的对策,并与传统的同类型对策进行了比较。
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引用次数: 1
An Improved Direct Method to Compute the Load Margin of Power Systems 电力系统负荷裕度计算的一种改进的直接法
M. E. Bento
The voltage stability margin is an index calculated as the difference between the load level of the nominal operating point of power systems and the load level where a voltage collapse occurs. This index is a valuable safety measure used in power system operation centers. However, this load margin may not be adequate because it does not consider oscillatory instabilities that may eventually arise as the load level increases and also because it does not consider different schemes for active power generation redispatches. This article proposes a unified direct method that determines the load margin of power systems considering voltage and oscillatory instabilities and, in addition, different schemes for active power generation redispatch are considered. Case studies of the application of the proposed method in the IEEE 39-bus power system model are presented and discussed.
电压稳定裕度是根据电力系统标称工作点的负荷水平与发生电压崩溃时的负荷水平之差计算的一个指标。该指标是电力系统运行中心有价值的安全措施。然而,这个负荷余量可能不够,因为它没有考虑随着负荷水平的增加而最终可能出现的振荡不稳定性,也因为它没有考虑有功发电再调度的不同方案。本文提出了一种统一的直接方法来确定考虑电压和振荡不稳定的电力系统的负荷裕度,并考虑了不同的有功发电再调度方案。最后给出并讨论了该方法在IEEE 39总线电力系统模型中的应用实例。
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引用次数: 2
ECG processing algorithm in the QRS complex 心电处理算法中的QRS复合体
Eduardo Viera, Héctor Kaschel, C. Valencia
This research shows the development of a novel algorithm for the processing of ECG (electrocardiograms) focused on the “QRS” complex, which measures the speed and acceleration of the heart rate based on the detection and generation of the “R” peaks. The objective is to establish a time window where the algorithm will run, allowing the early detection of arrhythmias in the heart rhythm, using few hardware and software resources, designed to be implemented in basic MCUs, performing an analysis in the time domain of the ECG. In addition, the design of an IIR filter of the Butterworth type is shown, specially designed for the elimination of Gaussian and Rayleight type noise, ensuring the obtaining of the “R” peaks of the “QRS” complex. The performance tests will be done with 5 ECG samples, four of them with medically normal ECG (Normal Sinus Rhythm), and one with atrial arrhythmia problems. This will ensure that the algorithm works, verifying that at large dispersions of heart rhythm accelerations it is possible to detect arrhythmias, in a simple processing system. Opening the way to the detection of arrhythmias based on the behavior of the acceleration of the heart rate.
本研究展示了一种以“QRS”复合体为中心的ECG(心电图)处理新算法的发展,该算法基于“R”峰的检测和生成来测量心率的速度和加速度。目标是建立一个算法运行的时间窗口,允许在心律中早期检测心律失常,使用很少的硬件和软件资源,设计为在基本mcu中实现,在ECG的时域中执行分析。此外,还设计了一种巴特沃斯型IIR滤波器,专门用于消除高斯和瑞利型噪声,确保获得“QRS”复合体的“R”峰。性能测试将用5个心电图样本进行,其中4个医学上心电图正常(正常窦性心律),1个有心房心律失常问题。这将确保算法的工作,验证在心律加速的大分散下,可以在一个简单的处理系统中检测心律失常。为基于心率加速的行为来检测心律失常开辟了道路。
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引用次数: 1
期刊
2021 IEEE International Conference on Automation/XXIV Congress of the Chilean Association of Automatic Control (ICA-ACCA)
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