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从提高反馈信号阻尼效果的角度出发,提出一种基于贡献因子的反馈信号优选方法。首先利用区间扩张理论和摄动理论将各反馈信号对闭环特征根的阻尼效果进行量化,并据此提出贡献因子的概念,然后利用贡献因子之和表征的系统总阻尼效果优选信号。IEEE 4机11节点系统和16机68节点系统的频域和时域仿真结果表明:基于贡献因子优选的反馈信号可协调不同类型的附加控制器,且适用于不同的控制规律;同时,还能够显著提高整个系统的阻尼水平,且控制效果与利用全部信号的控制效果相当,在系统运行方式发生变化的情况下具有一定的鲁棒性。
From the perspective of improving the damping effect of feedback signal, a feedback signal optimization method based on contribution factor is proposed. Firstly, the damping effect of each feedback signal on the closed-loop eigenvalue is quantified by using the interval expansion theory and perturbation theory. Based on this, the concept of contribution factor is proposed, and then the total damping effect optimization signal is used to represent the sum of contribution factors. The results of frequency domain and time domain simulation of IEEE 4-machine 11-node system and 16-machine 68-node system show that the feedback signal based on the contribution factor optimization can coordinate different types of additional controllers and is applicable to different control laws; at the same time, Significantly increase the damping level of the whole system, and the control effect is equivalent to the control effect of using all the signals, and has certain robustness under the condition that the system operation mode is changed.