含电压稳定裕度约束的模型预测电压控制器设计

本文提出一种基于模型预测控制的新型电压控制器设计方案，当系统发生扰动导致电压下降时，该控制器通过调节发电机参考电压设定值和无功补偿点的电容器投切量，使故障后系统电压恢复并满足给定的电压稳定裕度。该滚动优化模型中，目标函数综合考虑了电压偏移和控制成本，其等式约束为系统微分代数方程式，并将电压稳定裕度约束引入到不等式约束条件中。为了提高求解效率，采用直接动态优化方法将该动态优化模型转化为非线性规划问题，并采用AMPL优化建模软件提供的内点算法求解。以新英格兰39节点系统为基础构造的算例表明了所提方法的有效性。

Design of Model Predictive Voltage Controller with Constraints of Voltage Stability Margin

A new type of voltage controller is designed based on model predictive control in this paper. When the voltage follows caused by disturbs, the controller can restore the system voltage and maintain the voltage margin through coordinating reference voltages setting and the reactive power of shunt capacitor. In the dynamic optimization model, it considers the voltage derivation and control costs in the objective function, and the inequality constrains voltage magnitude and stability margin. To enhance computational efficiency of solving this optimization model, direct dynamic optimization method is used to convert this model into a nonlinear programming problem which can be solved using the interior-point algorithm given by AMPL as a mathematical optimization solver. Simulation results on New England 10-machine 39-bus system verify effectiveness of the proposed method.