基于非线性预测控制算法的发电机励磁与快速汽门协调控制

Coordinated control of excitation and fast valve based on nonlinear prediction algorithm

在非线性预测控制理论的基础上,提出了基于多目标方程的综合预测模型。采用发电机功角和机端电压输出方程为预测模型对各状态变量进行预测,在线滚动优化求出含有预测信息的励磁与快控汽门协调控制规律。通过建立预测模型方式,较好地解决了发电机状态方程非线性、时变的问题;通过对多目标系统综合求解,实现发电机组励磁与快速汽门系统的相互关联、协调控制。对单机无穷大系统的计算机仿真结果表明,采用此算法提高了系统的暂态稳定性和电压稳定性,增强了系统在故障后的动态品质。

On the basis of nonlinear predictive control strategy,a multi-objective system equation is proposed.The coordinated control design method of excitation and fast valve based on nonlinear predictive control is put forward and the controlling regulation is obtained.The predictive modeling and the idea of multi-objective system control theory can well resolve the problem of nonlinear,time-varying and interrelation of power system.The simulations of single machine infinite bus system show that by use of coordinated control of excitation and fast valve law based on nonlinear prediction control algorithm the power angle stability and voltage stability can be evidently improved and dynamic characteristics can be enhanced.