A Critical System Strength Evaluation of a Power System with High Penetration of Renewable Energy Generations

被引：34
作者：
Yu, Lin [1 ]
Sun, Huadong [1 ]
Xu, Shiyun [1 ]
Zhao, Bing [1 ]
Zhang, Jian [1 ]
机构：
[1] China Elect Power Res Inst, State Key Lab Power Grid Safety & Energy Conserva, Beijing 100192, Peoples R China
来源：
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS | 2022年 / 8卷 / 03期
关键词：
Critical short circuit ratio; critical value; grid impedance ratio; maximum power transfer theorem; static equivalent circuit analysis; STABILITY ANALYSIS;
D O I：
10.17775/CSEEJPES.2021.03020
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The power system is experiencing a higher penetration of renewable energy generations (REGs). The short circuit ratio (SCR) and the grid impedance ratio (GIR) are two indices to quantify the system strength of the power system with REGs. In this paper, the critical short circuit ratio (CSCR) is defined as the corresponding SCR when the system voltage is in the critical stable state. Through static voltage stability analysis, the mathematical expression of the CSCR considering the impact of GIR is derived. The maximum value of CSCR is adopted as the critical value to distinguish the weak power system. Based on the static equivalent circuit analysis, it is proved that the CSCR is still effective to evaluate critical system strength considering the interactive impact among REGs. Finally, we find that the GIR can be neglected and the SCR can be used individually to evaluate the system strength when SCR>2 or GIR>5. The correctness and rationality of the CSCR and its critical value are validated on ADPSS.
引用
收藏
页码：710 / 720
页数：11
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