同步电动机励磁控制器的设计要点

本文介绍同步电机的运行方式，作为电动机运行时对励磁控制的要求以及传统励磁控制器的缺点，并提出了全数字式同步电动机晶闸管励磁控制器的改进设计方法。     

基于遗传算法和模糊PID的励磁控制器

随着电力系统的发展,常规PID励磁控制器已经不能满足系统运行的动态和静态性能要求,为了克服这一缺点,设计了一种新型模糊PID控制器,在常规模糊PID励磁控制器基础之上,提出了一种利用遗传算法优化的模糊控制器.介绍了同步发电机自动励磁系统及模糊PID励磁控制器的构成,模糊PID控制器的原理及作用.仿真研究结果表明利用该方法设计的励磁控制器具有更好的动静态特性.     

基于DSP的电动轮自卸车励磁控制器的设计

针对重型电动轮自卸车电传动控制系统插件板多且存在故障率高、检修麻烦且备件昂贵等缺点,提出了一种以TMS320F2812为控制核心的电动轮自卸车励磁控制器的设计方法;介绍了电动轮白卸车的电气原理,说明了励磁控制器对电动轮自卸车的控制过程;讨论了交流采样、频率测量与同步信号和移相触发等实现技术;给出了励磁控制器主程序流程图和恒功率牵引运行励磁控制算法;测试结果表明该励磁控制器抗干扰能力强、控制精度好、集成度高且性能稳定.     

数字式柴油发电机组励磁控制器设计

本文研究了数字式励磁控制器的原理,提出了高性能的数字式励磁控制器的设计方案.硬件方案采用MCU建立高性能的硬件平台.软件方案采用同步交流采样算法,为高性能励磁控制提供精确的实时参数,励磁控制算法采用CMAC神经网络 经典的PID控制智能算法,实现了很好的动态响应.     

基于PCC的双馈风力发电系统励磁控制器的研究

在分析现有变速恒频双馈风力发电励磁控制系统的基础上,提出了一种基于PCC的双馈励磁控制器的实现方案;以PCC可编程控制器作为励磁控制器的核心控制器,简化了系统硬件结构,提岛了系统稳定性和系统的反应速度;通过搭建仿真实验系统,原动机采用15kW交流异步电机来模拟风机,双馈发电机采用绕线式感应电机,以整流模块和逆变模块组合为双向变流器,加入PCC励磁控制器,进行起励、故障切除等的仿真实验,检测了在发电机转速发生变化和跨越同步转速的情况下励磁控制器的工作情况和效果,实验结果证明,该方案完全满足实际要求.     

交流励磁发电机智能模糊励磁控制研究

在深入分析和研究交流励磁发电机的基础上,结合模糊控制不依赖对象模型、控制迅速等优点,针对交流励磁发电机提出了一种带有智能模糊控制器的新颖解耦励磁控制方法.通过模糊控制理论建立了相应的励磁控制模型,并以双PWM变换器为基础设计了智能模糊励磁控制器;通过仿真分析验证了智能模糊励磁控制器提高了系统的运行性能,以及智能模糊控制方法的正确性和有效性.     

电力系统鲁棒励磁控制器设计

本文给出了一种设计电力系统鲁棒励磁控制器的方法。设计原理是基于关于仿射非线性系统的Ｈ∞控制理论。控制器由两部分组成：一部分是线性最优励磁控制器，另一部分是额外补偿部分。仿真结果表明，电力系统的暂态特性在利用Ｈ∞控制之后得到明显改善。     

基于TMS320F2812的励磁控制器的设计与实现

文章介绍了一种以TM S320F2812为控制核心的励磁控制器,利用其数据处理能力强、片内外设丰富的特点,实现了交流采样、频率测量、移相触发等功能。试验表明,该励磁控制器已达到国标要求,TMS320F2812能够很好地满足励磁控制器的要求,具有良好的应用前景。     

基于TMS320C240x的励磁控制器研究

针对现在电力系统中励磁控制器数据处理慢、传输效率低的问题.本文提出了一种基于TMS320C240xa的DSP微机励磁控制器的设计方法,文中详细介绍了励磁控制器的模拟量输入单元、同步测频单元、数字量输出单元和移相触发单元的硬件设计.经过实验验证,这种基于DSP的微机励磁控制器具有硬件简单、软件灵活、抗干扰能力强、控制精度高的特点,可以推广应用于各种同步发电机的励磁控制.     

一种基于DSP的励磁控制器设计方法

针对现在电力系统中励磁控制器数据处理慢,传输效率低的问题,本文提出了一种基于TMS320C240xa的DSP微机励磁控制器的设计方法,文中详细介绍了励磁控制器的模拟量输入单元、同步测频单元、数字量输出单元和移相触发单元的硬件设计,并给出软件的主程序和中断服务程序设计方案.经过实验验证,这种基于DSP的微机励磁控制器具有硬件简单,软件灵活,抗干扰能力强,控制精度高.可以推广应用于各种同步发电机的励磁控制.     

Finite-time stabilizing excitation control of a synchronous generator

Using finite-time control approach, this paper proposes a new design method of non-linear robust excitation controllers of the third-order model in power systems. The finite-time excitation controller obtained here can improve the system's behaviour in several aspects, such as quick convergence and robustness for bounded uncertainties. Simulations show that the finite-time excitation controller is more effective than some other excitation controllers.     

Nonlinear variable structure excitation and steam valving controllers for power system stability

A set of novel nonlinear variable structure excitation and steam-valving controllers are proposed in this paper. On the basis of the classical dynamic equations of a generator, excitation control and steam valving control are simultaneously considered. Design of these controllers combines the differential geometry theory with the variable structure controlling theory. The mathematical model in the form of ＂an affine nonlinear system＂ is set up for the control design of a large-scale power plant. The dynamic performance of the nonlinear variable structure controllers proposed for a single machine connected to an infinite bus power system is simulated. Simulation results show that the nonlinear variable structure excitation and steam-valving controllers give satisfactory dynamic performance and good robustness.     

A family of robust adaptive excitation controllers for synchronous generators with steam valve via Hamiltonian function method

Using the Hamiltonian function method,this paper proposes a family of robust adaptive excitation controllers for synchronous generators with steam valve control.First,a parameterization method of robus...     

时滞随机子系统关联大系统的分散镇定

本文研究了系统内部与关联项中均含有时滞与随机噪声激励的大系统的分散镇定,得到大系统由局部控制器分散镇定的充分条件,给出分散控制器设计的算法ＤＤＣ,用异步迭代法求解Ｒｉｃｃａｔｉ联立矩阵方程组,从而求得系统的分散控制器。     

Equivalencing excitation and governor-turbine systems in multi-machine power systems using Walsh functions

When the generators of a coherent group in a power system are equivalenced for transient stability studies, it is logical that the associated controllers—excitation controllers and the speed governing systems—are also equivalenced. Depending upon various design features and capacity, the time constants of the transfer functions of different controllers may be different. This paper presents a Walsh function approach for equivalencing the controllers in multi-machine power systems, taking into account the above differences. The approach has an elegant mathematical base and provides any desired level of accuracy.     

一种DSP励磁控制器移相触发电路的设计

在同步发电机的励磁控制器中,移相触发模块用来触发整流桥中的晶闸管,使其控制角随着发电机端电压的变化而改变,从而达到自动调节励磁的目的,因此移相触发技术是自动励磁调节装置的一项关键技术。在介绍自动励磁控制器原理的基础上,论述一种基于DSP的移相触发电路的各个组成部分的设计和脉冲故障检测技术。这种数字移相触发器移相范围宽,灵敏度高,电路结构简单,安全可靠,可以推广应用于各种同步发电机的励磁控制。     

用确定性激励设计的适应控制

本文解决参数未知、干扰有界的线性离散时间系统的参数估计和适应镇定问题,设计控制器时事先只要求系统的阶巳知,系统能控、能观测,设计时所用的外部激励不用随机信号而用确定性信号。     

Consensus of multiple nonholonomic chained form systems

Consensus problems of multiple nonholonomic systems are considered in this paper. This problem is simplified into consensus problems of two subsystems based on the cascaded structure of nonholonomic chained form systems. Continuous and hybrid distributed controllers have been constructed for these two subsystems respectively based on the theory of cascaded systems. Consensus of multiple nonholonomic chained form systems can be realized using the methodology proposed in this paper no matter whether the group reference signal is persistently exciting or not. Different to previous assumptions on group reference such as persistent excitation or converging to nonzero constant, the condition on the group reference signal have been further relaxed in this paper. Simulation results using Matlab have illustrated the effectiveness of the results presented in this paper.     

Multi machine power system excitation control design via theories of feedback linearization control and nonlinear robust control

The dynamics of a large-scale power system are both nonlinear and interconnected. The equilibrium of such a system is typically unknown and uncertain, and the controllers within are also subject to physical limitations. In this paper, a new application of nonlinear robust control is presented for power system control design. It is assumed that the controllers are designed as a part of generator excitation system design. First, a customized exact feedback linearization scheme is developed for the power system under investigation. This new linearization scheme allows one to transform the power system with a single-axis system model into a linear uncertain system with an unknown equilibrium. Based on the latest development of nonlinear robust control theory, a novel control design is then applied to stabilize the resulting linearized uncertain system. Finally, a nonlinear decentralized excitation control is obtained by the inverse transformation. Compared with existing control schemes, the proposed control is free from such common deficiencies of power system nonlinear controllers as network dependence and equilibrium dependence. Detailed stability analysis and engineering judgment in the control design are provided. The results of simulation studies are presented.     

Dynamic performance improvement of an isolated wind turbine induction generator

A dynamic model of a variable speed stand alone wind generation system is developed. The transient performance of the system under variable wind gust and other disturbance conditions has been studied. It has been observed that a stand alone generator is very vulnerable to transient disturbances in the system. A variable susceptance excitation control system, installed at the generator terminal, has been shown to improve the dynamic performance of the system following transient disturbances. Additional pole-placement based PI and PID controllers in the excitation control circuit are shown to control the violently oscillating and even growing transients very effectively. The robustness of the proposed controller has been tested for various disturbances and also for a range of operation.