基于结构保持模型的多SVC协调控制

Coordinated Control for Multi-SVCs Based on Structure Preserving Model of Power System

针对非线性微分代数系统,在广义Hamilton系统理论的基础上,提出广义拟Hamilton系统的概念及相关控制策略从而实现该系统的镇定,并将其应用于含有多个SVC的结构保持多机电力系统中。根据系统结构,通过预反馈的方法完成拟Hamilton实现。在此基础上设计了相应的SVC协调控制器。所得Hamilton函数不仅可以看作是含有SVC控制结构保持模型的暂态能量函数,而且具有Lyapunov函数的特性,既保证了数学上的严密性,又有明确的物理意义。仿真结果说明所提方法对增强暂态稳定的有效性。

For the nonlinear differential algebraic system, this paper gives a new idea of generalized quasi Hamiltonian system and relevant control strategy based on the generalized Hamiltonian system theory. And this idea is applied to a structure preserving multimachine power system with static var compensators （SVC）. Based on the structure of the system, a prefeedback method is used to transform the system into a quasi Hamiltonian system. Accordingly the coordinated control law of SVC is designed with the Hamiltonian function, which can not only be regarded as the transient energy function of structure preserving model with SVCs, but also have the properties of Lyapunov function. The Hamiltonian function has precise mathematical meaning and specific physical meaning. Simulation results demonstrate the proposed method is effective in enhancing the transient stability.