电力系统混沌振荡的模糊滑模控制研究

发布时间：2018-01-29 11:04

本文关键词： 电力系统混沌振荡滑模变结构控制模糊控制　出处：《河北联合大学》2014年硕士论文　论文类型：学位论文

【摘要】：混沌理论在非线性系统研究中已经占据了重要地位，在诸多领域都可以发现其卓越的研究成果和实用价值。就目前而言，电力系统如何能够安全稳定运行，已经成为人们越来越关注的话题，当电力系统产生混沌振荡现象的时候，就会对系统的稳定运行产生一定影响，甚至会给整个互联电力系统带来巨大的损失。由于电力系统显著的非线性特征，它会在一定条件下产生无规则的混沌振荡。为了克服混沌振荡对系统造成的破坏，保证系统正常高速的平稳运行，所以需要进行深入的分析并找出切合实际的控制方法。通过对混沌现象及其发展历程的介绍，就目前混沌的研究现状加以分析和解释说明，指出研究的目的和意义，概述研究内容及技术路线。对混沌的本质定义和基本特性进行了分析，并对混沌分类及判定规律做了进一步说明，着重介绍了当前应用最为广泛的几种混沌控制方法。针对几种典型的电力系统混沌模型进行分析研究，根据不同数学模型的不同性质判断其发生混沌的条件，，并研究通向混沌的路径。介绍了滑模变结构控制与模糊控制的相关理论和抖振问题，选取二阶互联电力系统的数学模型为研究对象，采用滑模变结构控制方法，由于传统滑模变结构控制的基本特性，所以该方法存在高频抖振的缺点，在控制过程中加入模糊控制规则，设计模糊滑模变结构控制器，进行理论数值分析并通过MATLAB仿真平台实现。仿真结果表明，模糊滑模变结构控制器既抑制了电力系统的混沌振荡，又对高频抖振起到了很好的消除作用，验证了设计的优越性。
[Abstract]:Chaos theory has played an important role in the study of nonlinear systems, and its outstanding research results and practical value can be found in many fields. At present, how can power systems operate safely and stably. People have become more and more concerned about the topic, when the power system chaotic oscillation phenomenon, it will have a certain impact on the stable operation of the system. It will even bring huge losses to the whole interconnected power system, due to the remarkable nonlinear characteristics of the power system. In order to overcome the damage caused by chaotic oscillation and ensure the system running smoothly and at high speed, it can produce irregular chaotic oscillation under certain conditions. Therefore, it is necessary to carry out in-depth analysis and find out practical control methods. Through the introduction of chaos phenomenon and its development course, the present research situation of chaos is analyzed and explained, and the purpose and significance of the study are pointed out. The essential definition and basic characteristics of chaos are analyzed, and the classification and judging law of chaos are further explained. The most widely used chaos control methods are introduced in this paper. Several typical chaotic models of power system are analyzed and studied. According to the different properties of different mathematical models, the conditions of chaos are judged. The related theories and buffeting problems of sliding mode variable structure control and fuzzy control are introduced. The mathematical model of second order interconnected power system is chosen as the research object and the sliding mode variable structure control method is adopted. Because of the basic characteristics of the traditional sliding mode variable structure control, this method has the shortcoming of high frequency buffeting. Fuzzy control rules are added to the control process and fuzzy sliding mode variable structure controller is designed. The simulation results show that the fuzzy sliding mode variable structure controller can suppress the chaotic oscillation of power system. It also plays a good role in eliminating the high frequency buffeting and validates the superiority of the design.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712

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