多馈入交直流混联系统小干扰稳定研究综述

A Review of Small Signal Stability Studies of Multi-infeed AC-DC Hybrid System

我国电源与负荷的分布特点使多直流馈入交流系统成为我国电网发展的显著特征。多回大容量直流输电增强了电网传输能力,也使小干扰稳定问题具有新特点。随着电网复杂程度提高,多馈入交直流电力系统面临的小干扰稳定问题更加严峻,亟待进行具体的理论分析。介绍了多馈入交直流系统的典型结构和特点,回顾了多直流馈入交流系统动态交互作用机理及其小干扰下的稳定问题,总结了这一领域的研究方法及成果。最后,对多馈入交直流系统未来发展趋势及所面临的挑战进行了讨论,结果可为相关研究工作提供参考。

Multi-infeed AC-DC hybrid system is the notable form of China’s power grid upgraded because of the distribution of the generation and load.Multiple high-capacity high voltage direct current transmission lines enhance the transmission capacity,while the problem of small signal stability will emerge new features.As the complexity of the power grid increases,the small signal stability problem faced by multi-feed AC-DC power systems becomes more severe,and a specific theoretical analysis is urgently needed.The article introduced the typical structures and characteristics of multi-feed AC-DC hybrid systems.The system dynamic interaction mechanisms and the stability problems under the small signal stability caused by AC-DC system interaction were reviewed.The research methods and their achievements in this field were summarized.The future developing trend of multi-feed AC-DC hybrid system and the challenges were discussed to provide references for related research work at last.