二次型性能指标优化的多机电力系统负荷频率控制

Quadratic Performance Index Optimal Model of Multi-machine Power System Load Frequency Control

为了提高电能质量、确保电力系统经济稳定的运行,本文针对多机的负荷频率控制系统的结构特点,提出了基于二次型动态优化的自抗扰控制器(ADRC)参数设计方法,并在此基础上提出了多机电力系统负荷频率控制的方法。利用最优控制的二次型性能指标思想进行ADRC的非线性反馈控制器(NLSEF)参数的自整定,达到系统的最优调节。而二次型优化与ADRC融合解决了ADRC参数整定难的问题。实例仿真分析验证了ADRC在负荷频率控制系统应用的可行性,与传统PID控制比较,所设计的控制器在不消耗过多的能量下,实现负荷频率的最优控制,系统无超调鲁棒性强,达到了更为理想的控制效果。

In order to improve the quality of the power system as well as ensure economic stability of power system operation.Based on a single area with multi-machines and the structure characteristics of the load frequency control system,a kind of coordinator named ADRC will be put forward,which take as the premise of multi-machines power system load frequency control.Using the quadratic performance index optimal control method to realize self-tuning of nonlinear feedback control（NLSEF）,in this way to achieve the system optimal regulation.ADRC parameter dynamic self-tuning will be analyzed as key points unless using quadratic performance index optimal control.Compared with PID using ARDC is more excellent in adaptability and robustness.Besides optimized can achieve more ideal control effect.