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1、摘要摘要在电力系统的现代化程度越来越高的今天，为了确保电力系统安全、经济运行，提高和维持同步发电机运行稳定性变得尤为重要。改善同步发电机稳定运行的措施有很多，其中运用现代控制理论提高励磁系统的控制性能在社会上得到广泛的认可。为了对非线性系统进行全方位的线性化，本文基于微分几何理论设计一种非线性最优励磁控制器。该控制器通过对最优控制理论和微分几何精确反馈线性化理论相结合，将非线性PID与之并联，组成新的励磁控制器。其良好的控制效果体现在对电力系统稳定性的提高和对机端电压迅速稳定上，而且通过Matlab/Simulink仿真证实了此励磁控制器的优越性。本文为了设计一个拥有更好性能的模糊励磁控制器，
2、并实现了结合非线性PID控制理论、非线性最优控制理论与模糊控制理论所设计的励磁控制器。应用对电压调节有更优良特性的非线性PID励磁控制器作为主励磁控制器，同时应用非线性最优励磁控制器作为附加调节控制器，同时应用模糊控制器来动态协调主励磁控制器和附加调节控制器的作用权重。仿真结果表明，在不同的励磁状态下，所设计的励磁控制器能够在对调节电压以及增加系统阻尼的动态协调控制上有良好的作用。对所设计的这两种励磁控制器最后进行了比较，在控制效果上，两者都基本能达到控制精度和稳定性的要求。当受到静态小干扰时，非线性PID并联非线性最优励磁控制器在控制上不如模糊控制器；当受暂态大干扰时，模糊控制器在稳定时间、
3、超调量和极限稳定时间上都要优于非线性PID并联非线性最优励磁控制器。由此可知在各个方面上，模糊控制器要明显优于非线性PID并联非线性最优励磁控制器。关键词：电力系统；励磁控制；模糊控制；鲁棒性；电压反馈 Opinions and suggestions on the partys mass line educational practiceAccording to the central and provincial, municipal unified deployment, according to municipal Party committee about carrying out
4、the partys mass line educational practice activity in the citys implementation opinions, the spirit of the partys mass line educational practice activities from 20* in January to 99 months, carried out at all levels of departments and directly affiliated institutions and grass-roots party organizati
5、ons. According to my actual County, the county to carry out the education practice put forward the following implementation opinions.First, the overall requirementsCounty county education practice to the eighteen Party of eight, the spirit of the the third Plenary Session of the 18th CPC Central Com
6、mittee as the guidance, conscientiously implement the spirit of general secretary book series of important speech, earnestly implement the Central Committee really, opinions and advice , party implementing the guiding ideology of opinions to determine the objectives and requirements, step method, in
7、 accordance with the look in the mirror, dress up, wash bath, cure treatment, the general requirements of for the people pragmatic honest people as the theme, in carrying forward the spirit of Zhuanglang Zhuang, improve their work style, service to the masses of the people, the foundation of consoli
8、dating grassroots, promote transformation across efforts, to further implement the central eight regulations and The opposition party and government austerity waste regulations , double section provincial regulations, municipal provisions of the twelve plan and the implementation measures for on imp
9、roving the work style of close ties with the masses law, highlight style building, carry out the whole wind spirit, resolutely oppose formalism, bureaucracy, hedonism and wasteful extravagance to solve the problems, Party members and cadres of the style and the masses of people strong, the Ministry
10、of Party members and cadres to further improve their thinking and understanding, to further change the style of the wind, the masses to close, honest and pragmatic people honest image to further establish the foundation to further reinforce the basic level. Style of the building of the new results t
11、o promote the construction of a powerful force of the county and the ecological culture of the county and county construction.In educational practice activities of the unit is mainly: the county and below county departments under the organs, enterprises and institutions directly under the township,
12、street, and community, village, non-public economic organizations, social organizations and other grass-roots organizations. Agencies and branches, each single unit, follow the rules on internal institutions. Educational practice with step by step.To adhere to the county leadership, leadership and l
13、eading cadres to focus on outstanding catch to directly contact the service of the masses of law supervision departments and window units, service industry, educational practice, pay attention to grasp the heavy towns, streets and villages, community education activities and the masses of grassroots
14、 groups in close contact to strengthen, and the majority of Party members, cadres and the mass line line Marx doctrine view of the masses and the partys education.Always speak seriously as a basic attitude, adhere to positive education, to carry out criticism and self criticism group, adhere to the
15、pragmatic, more emphasis on leadership, pay more attention to the layers of the demonstration, more focus on the four winds, solve the problem, pay more attention to open the door, the participation of the masses, pay more attention to the classification guidance. Orderly, pay more attention to the
16、cooperation and cohesion driven, more strict requirements on injection, really supervision practice, ensure education practice is not empty is not empty is not partial, not as a mere formality.Two, the key point of the taskThe main task of the countys education practice is to seize against four wind this focus on centralized solve outstanding problems asked County, township leadership and leading cadres of the four winds, the disadva
