船舶发电机分散励磁鲁棒控制器设计

Robust controller design of ship decentralized excitation generator

为了提高船舶电力系统的抗干扰能力和稳定性,设计了分散励磁式船舶发电机系统的鲁棒控制器,建立了柴油机发电机组的数学模型,明确了模型中干扰项的物理意义。在将发电机组数学模型线性化并增广为广义受控系统后,应用H∞控制理论,设计了发电机的分散励磁鲁棒控制器,并应用线性矩阵不等式方法求解了控制器的解。通过仿真试验,比较了传统的电力系统稳定(PSS)控制器和分散励磁鲁棒控制器的控制效果,表明后者具有更好的抗干扰能力,提高了船舶电力系统的稳定性。

In order to enhance anti-interfere ability and stability of ship electrical power system, the method designing of robust controller of decentralized excitation generator is proposed in this paper. Mathematic model of generator set is illustrated, in which all kinds of interferences on model have specific physic meaning. After linearizing mathematic model of generator set and extending it into a generalized controllable system, H∞ control theory is applied to design decentralized excitation robust controller, then Linear Matrix Inequality（LMI） is adopted to resolve the controller. In simulation experiment, control effect of traditional power system stability（PSS） controller and decentralized excitation robust controller are compared with each other. Simulation results show that the latter has stronger anti-interfere ability and enhance the stability of ship electrical power system.