Coordinated Control Strategy of DC Fault Ride-through for Flexible DC Grid-connected System of Wind Power Based on Energy Storage

被引：0

作者：

Sun Y. ^{[1
]}

Lu Y. ^{[1
]}

Liu Y. ^{[1
]}

Wang Z. ^{[1
]}

Li G. ^{[1
]}

Wu X. ^{[2
,3
]}

机构：

[1] Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education, Northeast Electric Power University, Jilin

[2] Global Energy Interconnection Research Institute Co., Ltd., Beijing

[3] Beijing Key Laboratory of DC Power Grid Technology and Simulation, Beijing

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2023年 / 47卷 / 03期

基金：

中国国家自然科学基金;

关键词：

coordinated control; DC fault ride-through; energy storage system; flexible DC transmission; wind farm;

D O I：

10.7500/AEPS20210816004

中图分类号：

学科分类号：

摘要：

It is an ideal scheme for grid connection of large-scale renewable energy to adopt overhead-line flexible DC transmission with obvious technical and economic advantages. However, the failure rate of overhead lines is high and the DC system faults develop rapidly. Isolating the fault lines by DC circuit breakers alone cannot solve the fault ride-through problem of the system perfectly. To solve this problem, aiming at the DC line fault condition of grid-connected system of large-scale wind power through flexible DC transmission, a complete DC fault ride-through strategy is proposed from fault location and isolation to fault category judgment, and then to the coordinated control between energy storage system, converter station and wind farm by making full use of the extensive configuration of the energy storage system in the wind farm. Then, the fault characteristic is analyzed from the perspective of the energy. Compared with the energy consumption resistor method used in the existing projects, the proposed strategy has higher flexibility and better control effect in adjusting the unbalanced power of the system, and can reuse the stored energy to avoid energy waste. In addition, in order to reduce the power and capacity requirements of the energy storage system, the rotor acceleration control of wind turbines is proposed to reduce the output of wind farms. Finally, the effectiveness of the proposed method is verified on the PSCAD/EMTDC simulation platform. © 2023 Automation of Electric Power Systems Press. All rights reserved.

引用

页码：122 / 132

页数：10

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