Low-voltage Ride-through Method of AC Collection System for Renewable Energy Connected to Converter Station

被引：0
|
作者：
Jia K. [1 ]
Dong X. [1 ]
Bi T. [1 ]
Wang H. [1 ]
Niu H. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, North China Electric Power University, Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2024年 / 48卷 / 06期
关键词：
active voltage reduction; collection system; low-voltage ride-through; VF control;
D O I：
10.13335/j.1000-3673.pst.2023.0819
中图分类号：
学科分类号：
摘要：
When the AC collection system of the renewable energy connected to the converter station fails, the converter station is very prone to overcurrent locking and cannot realize the low-voltage ride-through (LVRT). Based on the analysis of the coupling mechanism and the characteristics of the power exchange devices at both ends, the problems existing in the power exchange system are first analyzed on the basis of the superposition of these devices. Then, an LVRT method based on the active step-down control is proposed. By monitoring the local output current of the converter station, the dynamic adaptive selection of the step-down amplitude is realized. At the same time, the LVRT boundary conditions characterized by the AC current are set. Finally, the problem of overcurrent locking of the converter station during the LVRT is solved. A refined model of the AC collection system with renewable energy connected to the converter station is built in the PSCAD, and the effectiveness of the proposed control method is verified by simulation. © 2024 Power System Technology Press. All rights reserved.
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页码：2385 / 2393
页数：8
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