基于反馈线性化的超导磁储能装置控制器研究

以含超导磁储能SMES(SuperconductingMagneticEnergyStorage)装置的单机无穷大电力系统为研究对象,建立了其非线性数学模型。在此模型基础上,提出了一种基于反馈线性化方法和线性最优控制理论的SMES控制规律的简便设计方法。一个重要的特点是:在所构成的线性系统中,通过坐标变换引入了发电机机端电压,因此,可以方便地实现使用SMES同时对系统的功角和电压稳定进行控制。仿真结果表明该控制器对改善系统的阻尼特性和提高系统的电压稳定性都具有良好的控制效果,同时也验证了该控制器的可行性。

Study on controller of superconducting magnetic energy storage based on feedback linearization

A single - machine to infinite - bus power system with SMES(Superconducting Magnetic Energy Storage) unit is investigated and its nonlinear mathematic model is established. A simple control strategy based on the feedback linearization method and the linear optimal control theory is proposed for the controller of SMES. One of its important features is that,as the generator terminal voltage is introduced into the linearized model of the controlled system by a coordinate transformation,it becomes easier to realize multi-functional control of both power angle and voltage stability. Simulation results show that the proposed controller improves both the damping characteristic and the voltage stability of the power system. At the same time,its feasibility is testified.