电力系统频率动态行为衍变与分析方法需求综述

Review of frequency dynamic behavior evolution and analysis method requirements of power system

低惯量可再生能源发展导致电力系统运行形态发生变化,频率动态行为愈加复杂,频率安全稳定面临新的挑战。阐述频率动态响应过程,综述频率动态行为量化特征和分析方法,强调基于人工智能分析方法的优势和前景。从可再生能源发电强波动、电源非同步并网低惯量及大功率缺额与连锁故障高风险三个角度,分析电力系统运行形态变化,探讨对频率分析与控制的新要求。剖析可再生能源快速发展背景下电力系统等效惯量的内涵,综述可再生能源虚拟惯量控制方法,强调多类型虚拟惯量协调控制的优势和前景。总结频率分析与控制领域中亟待研究的重点内容,给出后续研究建议。

The development of renewable energies changed the operation states of power systems, which complicated the frequency dynamics and brought about new challenges to frequency security and stability. The process of frequency dynamic response was introduced, whose quantitative characteristics and analysis methods were reviewed. And the strengths and promising prospects of frequency dynamics analysis method based on artificial intelligence were emphasized. From the viewpoints of the strong variability of renewables energies, the low inertia of nonsynchronous power sources, and the high risk of large power deficits and cascading faults, the changes of the operation states of power systems were analyzed, and the new requirements on frequency analysis and control were discussed. The inertia definition of power systems with the rapid development of renewable energies was revealed, and the virtual inertia control methods were reviewed. The strengths and promising prospects of the coordination control of multi-type virtual inertia were emphasized. The important issues to be focused in the research area of frequency analysis and control were summarized, and the suggestions for further studies were provided.