基于改进飞蛾优化算法的水火互联电网负荷频率控制

负荷频率控制是互联电网进行有功调频的重要方法,设计了一种基于改进飞蛾优化算法的水火互联电网负荷频率控制方案,该方案将Lévy飞行策略引入到飞蛾优化算法中,同时在飞蛾的更新公式中引入动态惯性权值和历史最优火焰平均值以改善算法性能,并对互联电网分数阶PID控制器参数进行优化整定,以提高收敛速度及寻优精度。建立三区域水火互联电网LFC系统仿真模型,采用改进飞蛾优化算法搜索获得最优的分数阶PID控制器参数,并在阶跃负荷扰动下进行仿真分析。结果表明,所提方案具有很好的鲁棒性和控制效果。

Load Frequency Control of Hydro and Thermal Interconnected Power Grid Based on Improved Moth-flame Optimization Algorithm

Load frequency control (LFC) is an important method for active frequency modulation in interconnected power grids. A load frequency control scheme for hydro and thermal interconnection grid is designed based on improved Moth-flame optimization algorithm. The scheme introduces the Lévy flight strategy into the moth optimization algorithm, and the dynamic inertia weight and the historical optimal flame average in the moth update formula is adopted to improve the performance of the algorithm and optimize the parameters of the fractional-order PID controller of the interconnected grid, which enhances the convergence speed and optimization accuracy. A simulation model of the three-area hydro and thermal interconnection grid LFC system is established. The proposed algorithm is used to search for the optimal fractional order PID controller parameters and simulation analysis under step load disturbance. The results show that the proposed scheme has good robustness and control effect.