电力系统鲁棒励磁控制器的设计

较系统地介绍了电力系统鲁棒励磁控制器的设计方法。给出单机无穷大系统中水轮发电机组的线性化模型,在此基础上推导出了所研究系统的状态空间描述,并按鲁棒控制理论设计了鲁棒励磁控制器。最后,用计算机仿真的方法对该控制器进行了研究,结果表明线性鲁棒励磁控制器在稳定系统方面优于线性最优励磁控制器。     

同步发电机最优励磁控制器的设计与实现

设计了一种以TMS320LF2407A为核心的最优励磁控制器。它以线性最优控制理论为基础,利用该DSP芯片强大的数据处理、丰富的片内外设资源和实时控制能力,实现了快速交流采样、PID控制算法、数字移相触发等功能。现场运行结果表明,该励磁控制器具有较高的控制精度和较好的稳定性。     

非线性励磁控制器的研究

同步发电机励磁控制器是电厂中十分重要的控制设备,结合传统PID控制对非线性励磁控制方式进行有效的改进.DSP控制器与可编程逻辑器件CPLD为核心组成的微机励磁控制器,具有很好的应用前景.     

现场CAN总线在同步发电机励磁系统中的应用

介绍了现场CAN总线通讯以及在同步发电机励磁控制系统中的运用,并具体给出了利用AT89C52单片机和CAN控制器SJA1000实现CAN接点通信的方法。     

PCC双通道励磁调节器的研究与开发

励磁系统是同步发电机的重要组成部分。介绍了一种新型的基于可编程计算机控制器(PCC)的双通道励磁调节器,详细介绍了PCC励磁调节器特点和软硬件系统设计的基本原理。     

考虑发电机励磁的AC/DC系统模型与控制器设计

针对高压直流输电系统(HVDC)与发电机励磁协调控制问题,建立了HVDC和发电机励磁综合控制模型,采用微分几何变换法进行部分线性化获得了与原系统相同定性行为的线性系统.基于该线性化模型设计了控制方案并对控制器进行仿真.仿真结果表明,验证了控制器的有效性、可靠性,易于实际应用.     

无刷双馈风力发电系统双空间矢量调制矩阵变换器励磁控制

矩阵变换器具有低频性能好、功率因数可调节、四象限运行等特点,以矩阵变换器为无刷双馈风力发电机的励磁控制器,可建立交流励磁变速恒频风力发电系统。采用双空间间接矢量控制策略控制矩阵变换器输出电流的幅值、频率、相位,从而调节发电机控制绕组电流的幅值、频率、相位,实现无刷双馈风力发电系统的变速恒频运行及功率因数控制。采用C语言编写数字信号处理器控制系统程序,实现双空间间接矢量调制策略,复杂可编程逻辑器件实现四步换流和产生双向开关矩阵控制信号。通过实际风力发电机组平台进行了相关试验,结果验证了控制方案的有效性。     

基于新型变结构的交直流附加阻尼控制器设计

针对现有变结构直流附加控制器简化模型存在误差和控制器精度不足的问题,提出一种基于新型变结构的交直流附加阻尼控制器设计方法。首先通过状态观测器得到系统的状态变量,引入变结构控制理论,选取线性切换函数和指数趋近律,且结合二次型性能指标最优控制,设计抑制交直流输电系统区域间低频振荡的新型变结构直流附加控制器;为进一步提高系统稳定性,基于该方法设计发电机励磁附加控制器,实现机网协调控制;最后在PSCAD建立四机两区域仿真模型进行时域仿真,仿真结果表明该新型变结构附加控制器具有较强的鲁棒性和较好的暂态稳定控制性能,研究成果可指导工程实践。     

基于反推方法的滑模自适应励磁控制

针对电力系统参数摄动和外界干扰等因素对励磁系统的影响,经过对传统模型状态变量的变换,建立了励磁控制系统模型,设计了基于backstepping方法的模糊滑模励磁控制器。该方法通过逐步构造Lyapunov函数和设计切换函数．从而得到了最终的控制规律。最后对所设计的算法进行了仿真研究,与常规PID＋PSS控制方法相比,系统在动静态响应性能上均优于PID＋PSS控制。通过仿真表明这种控制方法不仅有效而且还能达到比较满意的控制效果。     

基于双微机励磁调节器脉冲板的设计及改进

介绍了一种基于ARM控制器芯片AT91RM9200设计的双套微机励磁调节装置的组成,重点讨论了装置脉冲板的设计。针对励磁调节器的关键部分——故障监测和主从切换单元提出了合理的改进。改进后的设计简化了硬件结构,增加了软件的逻辑判断,同时提高了故障切换的稳定性。最后讨论了相关有效的抗干扰技术措施。     

Implementation and test results of a generalized self-tuningexcitation controller

A self-tuning excitation controller performing the functions of AVR (automatic voltage regulation) and stabilization, and an interactive man-machine interface have been implemented using two microcomputers. The general setup of the hardware and software are described. Results of experimental tests on a physical model of a power system are also presented. The results demonstrate the effectiveness of the adaptive controller     

A self-tuning automatic voltage regulator designed for anindustrial environment

Examination of the performance of fixed parameter controllers has resulted in the development of self-tuning strategies for excitation control of turbogenerator systems. In conjunction with the advanced control algorithms, sophisticated measurement techniques have previously been adopted on micromachine systems to provide generator terminal quantities. In power stations, however, a minimalist hardware arrangement would be selected leading to relatively simple measurement techniques. The performance of a range of self-tuning schemes is investigated on an industrial test-bed, employing a typical industrial hardware measurement system. Individual controllers are implemented on a standard digital automatic voltage regulator (AVR), as installed in power stations. This employs a VME platform, and the self-tuning algorithms are introduced by linking to a transputer network. The AVR includes all normal features, such as field forcing, VAr limiting and overflux protection. Self-tuning controller performance is compared with that of a fined gain digital AVR     

用PIC16C54单片机设计DF4型机车步进电机驱动器

介绍使用PIC16C54单片机设计DF4型机车步进电机驱动器的方法,给出了硬件电路和应用软件。用PIC16C54单片机设计的东风4型机车步进电机驱动器的硬件电路比现在使用的普通步进电机驱动器的硬件电器结构大为简化,易于故障查找和维护。     

Integrated fuzzy logic generator controller for stabilityenhancement

An integrated fuzzy logic controller is proposed in this paper for the generator excitation and speed governing control. The proposed controller has three control loops: the first one is the voltage control loop which has the function of automatic voltage regulator (AVR), the second one is the damping control loop which has the function of power system stabilizer (PSS), and the last one is the speed governing control loop which has the function of governor (GOV). A simple fuzzy logic control scheme is applied to all these three loops. The control scheme is simple enough so as not to require heavy computation for the controller, therefore, its real time application is feasible. The effectiveness is demonstrated through nonlinear simulations using a one machine infinite bus system. Comparison studies are also performed to show the advantages of the proposed controller with conventional excitation and speed governing control systems     

花园水电站综合自动化系统的设计与应用

以水电站“无人或少人值守”的原则作为设计主要目标,对花园水电站的综合自动化系统设计及实现方式进行了简单介绍。分别从系统结构、硬件设计及软件设计等几个方面,详细论述了该水电站综合自动化系统的设计过程。该电站的综合自动化系统采用基于美国GE公司90—70系列的可编程逻辑控制器（PLC）,包括了计算机监控、继电保护和发电机励磁等功能,经过各项试验验证,该电站的综合自动化系统达到了要求的设计目标。     

基于LabVIEW的励磁系统状态监测与分析研究

鉴于励磁系统对于整个电力系统的重要性。研究开发了一套基于LabVIEW软件平台的励磁设备的状态监测与分析系统。描述了该系统的硬件体系结构和软件框架,通过软件界面,用户可以直观地观测到励磁系统的各个性能指标。试验表明了该系统具有较好的可靠性和实用性。     

Co-ordinated control of synchronous generator excitation and staticVAR compensator

The application of multivariable control to a synchronous generator excitation and static volt-ampere reactive (VAR) compensator system is described to design a coordinated excitation and firing angle discrete controller. It is based on a reduced-order linearized model, obtained by system identification, which represents the nonlinear dynamics around a specified operating point. The model structure was investigated by simulation studies indicating that a third-order representation was suitable. Direct comparisons of identified model responses with corresponding results from the nonlinear model show that accurate modeling can be achieved by this approach. Quantitative assessments also established that the models are satisfactory. The controller was evaluated by simulation of a nonlinear generator model, involving comparisons between the coordinated controller with several different controllers, over a wide range of operating conditions and disturbances. It is shown that the coordinated control arrangement can provide better stability, voltage control, and damping than the other schemes     

挖掘机器人柴油机油门控制系统

自行设计和研制了一种挖掘机器人柴油机油门电子控制系统，能实现柴油机三种工作模式选择和自动怠速功能，并在系统软件设计和硬件设计两方面采取措施，提高系统的可靠性，使用结果表明，系统完全达到了设计要求。     

变频调速器在微机控制锅炉补水系统中的应用

介绍了锅炉管网传统补水工艺后,设计了采用变频调速器的微机自动补水系统实现恒压补水的工艺和闭环控制原理,给出了系统硬件电路及软件框图。对节电效果进行了分析。