基于多运行方式的广域阻尼控制器协调设计方法研究

Coordinated Design Approach for Wide-area Damping Control Under Multiple System Operating Conditions

广域阻尼控制是抑制大电网低频振荡的重要手段,针对现有关于广域阻尼控制的研究大多基于简单系统,且大多基于单一运行方式设计控制器参数,在大电网及多运行方式下存在应用困难的不足,提出适用于大电网的广域阻尼控制器设计方法。首先,提出基于频域子空间辨识理论的广域阻尼控制器参数频域设计方法,该方法不需要实际系统建模,基于实测方法完成阻尼控制器参数设计,且方法实施过程简单有效,便于工程应用;然后提出基于遗传算法的广域阻尼控制器多运行方式协调设计方法,利用遗传算法多目标函数协调优化功能保证了控制器在多运行方式下的鲁棒性,同时算法实施过程不依赖于系统的详细模型,因此适用于实际大电网应用;最后,在上述研究基础上提出广域阻尼控制设计流程,为广域阻尼控制技术在实际电网中的应用提供解决方案。通过实际电网的实例验证方法的有效性及在实际电网中应用的可行性。实例分析表明,使用该文方法设计的广域阻尼控制器,系统阻尼特性大幅提升,该方法还具有适应多运行方式的特点,适用于大型互联电网的实际工程应用。

Wide-area damping control is important to suppress low frequency oscillation of large-scale power grid,for the deficiency of existing research on wide-area damping control system is mostly based on simple power systems and the design of the controller parameters mostly based on single operation mode,is difficult to application in the large-scale power grids and multi-operation mode.A wide-area damping controller design method which is suitable for large-scale power grid was presented in this paper.First,the frequency domain design method of wide-area damping controller based on the frequency domain subspace identification was presented.The method don＇t require the actual system modeling,completing damping controller parameter design based on measure,is suitable for project realize.Then,the coordination design method of the wide-area damping controller multi-operation mode based on genetic algorithm was presented.The method ensures controller robustness of multioperation mode used multi-objective optimization coordination function of genetic algorithms,and the algorithm implementation process does not depend on detailed model of the system,so the method is suitable for practical large-scale grid.Finally,the design process of wide-area power grid was presented.The effectiveness of the method and the feasibility of the application in the practical grid are demonstrated by the oscillation examples of the practical grid.The practical case study results show that after using the wide-area damping controller designed by this method,the damping characteristics is significantly improved,the method also is suitable for multi-mode operation,and does not depend on detailed model of the system,can be applied to design the wide-area controller of large-scale interconnected power system.