基于留数的广域阻尼控制协调优化设计

Coordinated optimization design for wide area damping control based on residue

广域阻尼控制器在提高主导模式阻尼的同时也可能导致其他模式阻尼的恶化,因此需要对广域阻尼控制器进行协调优化设计。从多模式阻尼协调问题的本质出发,基于留数的概念分析了广域阻尼控制器对不同模式产生的影响,从2个方面进行阻尼协调设计:一方面通过根轨迹法选择控制器地点或反馈信号,另一方面通过改进的粒子群算法进行控制器参数优化,使得在增强主导模式阻尼的同时能避免对非主导模式阻尼的较大影响。通过4机系统上的算例对提出的阻尼协调设计方法进行了验证,说明基于根轨迹的控制和观测配置方法或者基于PSO控制器参数优化可以找到一组配置使得所有非主导模式阻尼不被恶化,或者提供一个将非主导模式阻尼损失降至最低的选择。

While the wide area damping controller improves the damping of dominant modes,it may deteriorate that of non- dominant ones. As a result,it needs the coordinated optimization design. The effect of wide area damping controller on non-dominant modes is studied based on the residue and two ways of coordinated optimization design are proposed：to select the placement of controllers or the feedback signals by the root locus method and to set its parameters by the particle swarm optimization. Eigenanalysis is carried out for a four-machine power system to verify the proposed ways. The results show that a configuration set can be found, which will not deteriorate the damping of non- dominant modes ,or a parameter set can be selected ,which will minimize the damping loss. This project is supported by the Key Project of National Natural Science Foundation of China（50595413）.