基于目标全息反馈法的发电机非线性励磁控制设计

Nonlinear Excitation Control for Generator Unit Based on NCOHF

针对单输入非线性控制系统,提出了一种目标全息反馈的非线性控制设计方法(NCOHF),以解决非线性控制系统的多目标控制问题。该方法可将非线性控制系统的多目标控制问题转化到线性空间中,并均在性能指标中得到约束,从而控制规律包含全部控制目标的反馈信息,形成目标全息反馈的思想。将这种设计思想运用于发电机非线性励磁控制设计中,分别设计得出2种均以机端电压、有功功率和角速度为控制目标的目标全息反馈非线性励磁控制规律(NECOHF)。仿真结果表明:这2种控制规律不仅能有效地镇定发电机的机械振荡,改善系统的稳定性,而且能很好地解决发电机输出特性的控制精度问题。

This paper proposed the Nonlinear Control design method with Objective Holographic Feedbacks （NCOHF） that could solve the multi-objective control problems of the single input nonlinear control system. Applying the design scheme, the multi-objective control problems of the nonlinear control system were transformed into the linear space and punished by the performance index, so the control law included the feedback information of all control targets. For the excitation control system of the generator, two Nonlinear Excitation Control laws with Objective Holographic Feedbacks （NECOHF） were derived. Simulation results show that NECOHF can not only eliminate the problem of the terminal voltage deviating, but also can damp the mechanical oscillation of the generator. Thus NECOHF improves the output characteristic of the generator.