基于降阶模型辨识的交直流混合输电系统广域阻尼控制

提出了一种辨识交直流混合输电系统降阶模型并设计其广域阻尼控制器的方法。首先在单输入单输出系统模型辨识原理的基础上提出交直流混合输电系统降阶模型的辨识方法；根据射影控制原理进一步设计了交直流混合输电系统的广域阻尼控制器。考虑到广域反馈信号在传输过程中存在的通信时延对系统稳定性的影响，设计了基于广域信号主导模式的时延补偿环节。以规划中的南方电网交直流混合输电系统进行算例研究，验证了所设计的广域阻尼控制器的有效性与可靠性。

Wide-Area Damp Control for AC/DC Hybrid Transmission Systems Based on Identification of Reduced Order Model

The authors propose a method to identify the reduced order model of AC/DC hybrid transmission system and design the wide-area damp controller for the hybrid system. At first, based on the principle for the identification of single input single output system model, an identification method for reduced order model of AC/DC hybrid transmission system is presented; then according to the principle of projective control, a wide-area damp controller for AC/DC hybrid transmission system is further designed. Considering the impact of communication delay existing in the transmission of wide-area feedback signal on system stability, based on the dominant mode of wide-area signal a time-delay compensation link is designed. Taking the being planned AC/DC hybrid transmission system of South China Power Grid for calculation example, the effectiveness and reliability of the designed wide-area damp controller is verified.