On-line Frequency Security Analysis of Interconnected Power Grid Considering Inertia Adequacy and RoCoF

被引：0
|
作者：
Liu X. [1 ,2 ]
Li H. [1 ,2 ]
Gu X. [1 ]
Zhong W. [3 ]
Li Z. [4 ]
Shi S. [2 ]
机构：
[1] School of Electrical and Electronic Engineering, North China Electric Power University, Hebei Province, Baoding
[2] State Grid Hebei Electric Power Co. Ltd, Hebei Province, Shijiazhuang
[3] State Key Laboratory of Power Grid Security and Energy Conservation, China Electric Power Research Institute, Haidian District, Beijing
[4] National Power Dispatching & Control Centre, Xicheng District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 05期
关键词：
frequency security; inertia adequacy; interconnected power grid; load inertia; rate of change of frequency (RoCoF);
D O I：
10.13335/j.1000-3673.pst.2022.1945
中图分类号：
学科分类号：
摘要：
Since the significant decrease of the system inertia level caused by the rapid increasing proportion of new energy installed capacity, the online assessment of the frequency security margin of the power grid effectively provides a guidance for the safe operation of the system. Firstly, a calculation method of the grid inertia considering the load characteristics and the external power receiving level is proposed by analyzing the composition of the system inertia, and the grid inertia adequacy index and the rate of change of frequency (RoCoF) index are obtained. Secondly, based on the inertia adequacy index and the RoCoF, an analysis of regional power grid mutual supply capacity studying the influence of the fault impact, the power receiving level and the motor inertia on the system frequency security is proposed. Thirdly, the accuracy of the index is verified, the displacement characteristics of the equivalent inertia and the generated output are tested by simulation. Finally, the online evaluation process of the grid inertia adequacy and the analysis method of the safe operation region are proposed, which provides the decision-making basis for guiding the safe operation of the power grid. © 2023 Power System Technology Press. All rights reserved.
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页码：1780 / 1787
页数：7
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