SVC与发电机励磁的非线性状态PI协调控制

NONLINEAR STATE PI CONTROL FOR STATIC VAR COMPENSATOR (SVC) COOPERATING WITH EXCITATION SYSTEM OF GENERATOR

针对电力系统的强非线性和不确定性 ,运用非线性状态比例积分 (PI)解耦控制直接对其非线性不确定对象设计了静止无功补偿器 (SVC)与发电机励磁的协调控制器。该控制器避免了基于反馈线性化理论的非线性协调控制器由于数学模型的误差而影响控制器性能的缺点 ,所得的控制规律与系统运行点和网络结构完全无关。仿真计算表明 ,SVC与发电机励磁非线性状态 PI协调控制器能有效地提高系统的暂态稳定性。

In view of the strong nonlinearity and uncertainty of power system, applying nonlinear state PI decouplingcontroller to its nonlinear uncertain object, a Static Var Compensator(SVC) controller cooperating with the excitation system of generator is designed, thus, the affect of nonlinear cooperative controller, which is based on linearization theory of feedback, on controller performance due to the error of mathematical model can be avoided, and the obtained control law is entirely not dependent on both the operation condition and the network structure of power system. Simulation results show that nonlinear state PI SVC controller cooperating with the excitation system of generator can improve dynamic stability of power system effectively.