A Flexible Saturation Limiter for DC-Link Voltage Control of Grid-Forming Inverters With Enhanced Transient Stability

被引：2

作者：

Luo, Cheng ^{[1
,2
]}

Ma, Xikui ^{[1
]}

Liu, Teng ^{[3
]}

Wang, Xiongfei ^{[4
,5
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China

[2] Aalborg Univ, AAU Energy, DK-9220 Aalborg, Denmark

[3] China Southern Power Grid, Elect Power Res Inst, Guangzhou 510663, Peoples R China

[4] KTH Royal Inst Technol, Div Elect Power & Energy Syst, S-11428 Stockholm, Sweden

[5] Aalborg Univ, Dept Energy AAU Energy, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON ENERGY CONVERSION | 2023年 / 38卷 / 04期

关键词：

Grid-forming (GFM) inverters; transient stability; DC-link voltage controller (DVC); flexible saturation limiter (FSL); SYNCHRONIZATION; CONVERTERS;

D O I：

10.1109/TEC.2023.3273723

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：

This article analyzes the influence of the saturation limiter used with dc-link voltage control (DVC) on the transient stability of grid-forming (GFM) inverters and proposes a flexible saturation limiter to alleviate its adverse impact. First, it is found that the conventional saturation limiter (CSL) can enhance transient stability. Yet, it would boost the dc-link voltage or even trigger overvoltage protection, especially when the threshold value of CSL is small. To tackle the adverse impact of CSL on dc-link voltage, a flexible saturation limiter is proposed, which only begins to limit the active power reference when the derivative of dc-link voltage turns from positive to negative (the dc-link voltage reaches its peak value at this instant). Finally, experimental tests confirm the effectiveness of the scheme.

引用

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页码：2514 / 2524

页数：11

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