摘要
提出了一种基于协同控制理论的非线性励磁控制器。首先依据同步发电机励磁控制的基本要求和特点,选择机端电压、有功功率和转子角速度三个变量的偏差的线性组合构成流形,以保证有效控制机端电压和抑制系统功率振荡。然后以同步发电机非线性模型为对象,推导出了非线性协同励磁控制器(Synergetic excitation controller,SEC)的控制律,并根据电力系统的运行特性,探讨了控制器参数的选取原则。最后,单机无穷大系统仿真结果表明,无论在大扰动还是在小扰动下,所提非线性协同励磁控制器比常规的AVR+PSS方式下的励磁控制器都能更快更精确地调节机端电压,还能够有效地抑制系统的功率振荡。
This paper proposes a nonlinear excitation controller based on synergetic control theory. Firstly, the deviations of generator terminal voltage and rotor speed and active power are used to make a manifold considering the basic requirements and characteristics of excitation system in order to regulate terminal voltage of generator and suppress power oscillations. Then, the control law of synergetic excitation controller （SEC） is deduced from the nonlinear model of synchronous generator. According to the operating characteristics of power system, the principles of selecting the controller parameters are also presented. Finally, simulation results of a single machine infinite bus （SMIB） power system demonstrate that the performance of the proposed controller is better than that of the conventional AVR＋PSS excitation controller both in terms of terminal voltage regulation of generator and damping power system oscillation under small as well as large disturbances.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2013年第23期1-7,共7页
Power System Protection and Control
基金
国家自然科学基金项目(51207063)~~
关键词
同步发电机
励磁控制
非线性控制
协同控制
流形
synchronous generator
excitation control
nonlinear control
synergetic control
manifold
