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提出了一种非线性自适应最优励磁控制器。新的控制设计方法基于同步发电机的三阶双轴数学模型 ,其仅由代数运算实现的分散非线性反馈补偿律保证了系统在各种运行方式下具有足够的稳态调节精度。控制算法内置一个简单的在线自适应变增益策略以达到在各种工况下动态最优化控制的目的 ,通过求解闭环特征值优化问题来选取权矩阵的方法改善了系统受扰后的暂态响应性能。仿真计算结果表明 ,与传统的线性最优控制器相比 ,新的励磁控制器具有多方面优点。
A nonlinear adaptive optimal excitation controller is proposed. The new control design method is based on the third-order biaxial mathematical model of synchronous generator. The decentralized nonlinear feedback compensation law, which is implemented only by algebraic operation, ensures that the system has sufficient steady-state regulation accuracy under various operating modes. The control algorithm built a simple online adaptive gain-gain strategy to achieve the goal of dynamic optimal control under various working conditions. By solving the closed-loop eigenvalue optimization problem, the weight matrix is selected to improve the system’s transient response performance. Simulation results show that, compared with the traditional linear optimal controller, the new excitation controller has many advantages.