大规模互联电网低频振荡分析与控制方法综述

A Survey on Analysis on Low Frequency Oscillation in Large-Scale Interconnected Power Grid and Its Control Measures

低频振荡已成为严重威胁互联电网安全稳定运行的突出问题。从第1次提出低频振荡的概念到目前为止,涌现了许多新的和改进的分析方法去解决这个问题。现阶段,广域测量系统的出现又为更好地在线监视低频振荡提供了新的技术手段。从振荡机制、分析方法和防控措施等几个方面较为系统地总结了低频振荡研究领域的方法和成果。鉴于目前电网发展迅速,低频振荡仍然是威胁电网安全稳定运行的重要因素,为促进低频振荡防控新技术的工程应用,提出包括强迫振荡源搜索、谐振机制研究、辨识方法综合应用、新型控制器研制等7个需要重点关注研究问题。

Low frequency oscillation （LFO） severely threatens the secure and stable operation of interconnected power grids. Since the appearance of the concept of LFO there are lots of analysis approaches to solve this problem. At present wide area measurement system （WAMS） provides new technical manner for better on-line monitoring of LFO. The authors systemically summarize the approaches and results of LFO research in the aspects of oscillation mechanism, analysis methods and measures to prevent and control LFO. In view of rapid development of interconnected power grid, LFO is still an important factor threatening security and stability of power grids. To promote engineering application of new techniques to prevent and control LFO, several problems, which is to be pay special attentions to, such as searching forced oscillation source, research on LFO, comprehensive application of identification methods, development of novel controller and so on are proposed.