REACTIVE POWER SUPPORT CONTROL STRATEGY FOR PV GRID-CONNECTED INVERTERS UNDER ASYMMETRIC GRID FAULTS

被引：0

作者：

Liao, Yiding ^{[1
]}

Xia, Xiangyang ^{[1
]}

Liu, Junxiang ^{[1
]}

Jiang, Daiyu ^{[1
]}

Wang, Can ^{[2
]}

Wang, Lei ^{[2
]}

机构：

[1] School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha

[2] Changgao Electric Group Co., Ltd., Changsha

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 09期

关键词：

fault ride through; inverter; photovoltaic system; power quality; reactive power; safe operation region;

D O I：

10.19912/j.0254-0096.tynxb.2023-0754

中图分类号：

学科分类号：

摘要：

Aiming at the problems of output current peak exceeding limit, AC side power fluctuation and DC side voltage instability in photovoltaic system under asymmetric grid fault, this paper proposes a reactive power support control strategy for photovoltaic grid-connected inverter under asymmetric grid fault. Taking the reactive power support requirement as the goal, the active power safe operation area of the inverter is determined with the active power fluctuation amplitude and the output current peak as the constraint conditions, providing sufficient reactive power support and expanding the active power output capability, or providing partial reactive power support according to the reactive current weight within the constraint conditions to ensure the safe operation of the photovoltaic system in the event of an asymmetric grid fault. Finally, the simulation verifies the effectiveness of the control strategy. © 2024 Science Press. All rights reserved.

引用

页码：326 / 333

页数：7

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