【作者】 张宗华；

【导师】 李啸骢；

【作者基本信息】 广西大学 ， 电力系统及其自动化， 2007， 硕士

【摘要】 随着电网规模的不断扩大，在带来巨大经济效益同时也给电力系统的安全稳定运行带来严重的挑战。改善电力系统控制品质，提高其稳定性和安全水平，是电力系统稳定研究的一个重要课题。本文围绕这一问题，研究和探讨了多指标非线性控制理论在同步发电机励磁控制中的应用。励磁控制器是励磁系统的重要组成部分，对电力系统的安全稳定运行有着十分重要的意义。随着大规模集成电路技术及计算机技术的发展，采用微处理器作为硬件控制核心的微机励磁控制器将成为今后励磁控制器的发展方向。随着励磁控制法的不断改进与发展，对微机励磁控制器的运算速度提出了非常高的要求，本文根据这种要求，以DSP(数字信号处理器)作为控制核心，研究了基于DSP的励磁控制器。本文首先介绍了励磁控制器的发展趋势，包括励磁控制器的硬件结构及控制方法的发展，目前微机励磁控制器的基本结构以及励磁控制方式对励磁控制器的要求。其次，文中在介绍了控制理论的基础上设计了一个基于DSP的同步发电机多指标非线性励磁控制器，并着重介绍了励磁限制器的原理和设计。最后，文中分别从DSP、A／D采样、FFT产生等几个方面详细地论述了基于DSP的励磁控制器的硬件设计以及实时的软件设计。文中提出的这种基于DSP的励磁控制器采用了许多先进技术，如交流采样、数字脉冲等。这些先进技术的采用使得本文中的励磁控制器结构简单、性能可靠、操作方便。这种基于DSP的励磁控制器在半实物仿真器上进行了相关实验。实验表明，该励磁控制器的各项功能符合设计要求，且有些功能优于其他的励磁控制器。更多还原

【Abstract】 With the continuous enlargement of power grid, the demand to system security and stability is getting more and more. The large power grid brings latent threat and challenge to system security and stability while getting enormous economic benefits simultaneously. This paper is enclosed this problem and study in the nonlinear control theory in a number of indicators of synchronous generator excitation control.Excitation controller, as a main part of excitation system, is very important to the safe and steady operation of power systems. With the development of large-scale integrate circuit technology and computer technology, microcomputer-based excitation controller will become the main stream of excitation controllers in the future. Constant improvement in excitation control method set an even higher requirement for the computation of the microcomputer -based excitation controller. Based on this request, the paper studies the DSP-based excitation controller by using DSP (Digital Signal Processor) as the control center.Firstly, this paper introduces the developing tendency of excitation controller, including the development of hardware and control method, microcomputer-based excitation controller’s hardware structure and requirement of excitation control method to hardware. Secondly, this paper also introduces the theory basis of Multiple Indicator nonlinear excitation controller, and the theory and design of the excitation limiter. Finally, this paper deals with the design of the DSP-based excitation controller’s hardware and realization method of its software from the aspects of DSP, A/D conversion, FFT. The DSP-based excitation controller adopts many advanced technologies, such as alternating current sampling, digital pulse etc. Because of the adoption of these advanced technologies, the excitation controller’s structure is simpler, its performance is reliable and its operation convenient.The DSP-based controller in this exciting semi-loop simulation on the experimental device. Results of the test show that all functions of the excitation controller are efficient and some are even better than the other microcomputer-based excitation controllers.更多还原