STATCOM与发电机励磁的多指标协调控制

Multi-index coordinated control for STATCOM and generator excitation

针对单机无穷大系统,使用多指标非线性控制方法,建立6阶非线性数学模型,实现凸极式发电机励磁与STATCOM的协调控制。从STATCOM内部结构入手,采用STATCOM的脉冲控制角θ和STATCOM超前系统电压角α为控制量,克服了以往的STATCOM模型的约束条件,提高了STATCOM与发电机励磁协调控制的动、静态性能。仿真结果同线性最优控制方法比较,并验证了所建STATCOM模型和所求非线性控制率u的合理性和有效性。

According to a single machine infinite bus( SMIB) system, the six order nonlinear mathematics model is established to realize coordinated control of salient-pole generators and STATCOM by multi-index nonlinear control scheme. This paper,starting with the internal structure of STATCOM,uses the STATCOM 's pulse control angle θ and the angle α as the control amount. This new model which overcomes the previous strong constraints conditions of the STATCOM improves the nonlinear system's dynamic and steady-state performances. The simulation results which compared with the method of the Linear Optimal Control( MNC) indicate that the new STATCOM model and the nonlinear control rate u presented in this paper are reasonable and effective.