Enhanced FRT and Postfault Recovery Control for MMC-HVDC Connected Offshore Wind Farms

被引：75

作者：

Li, Weixing ^{[1
]}

Zhu, Meng ^{[1
]}

Chao, Pupu ^{[1
]}

Liang, Xiaodong ^{[2
]}

Xu, Dianguo ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Elect Engn, Harbin 150001, Peoples R China

[2] Univ Saskatchewan, Dept Elect & Comp Engn, Saskatoon, SK S7N 5A9, Canada

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2020年 / 35卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Offshore wind farms; MMC-HVDC; fault ride through; two-stage voltage drop control; adaptive voltage rise control; voltage-dependent active current control; FAULT-RIDE; POWER-PLANTS; VOLTAGE; AC; REQUIREMENTS; CONVERTERS; SYSTEM;

D O I：

10.1109/TPWRS.2019.2944940

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Modular Multilevel Converter based High Voltage Direct Current (MMC-HVDC) connected offshore wind farms could suffer serious challenges: DC overvoltage during a fault and post-fault DC voltage restoration. In this paper, to mitigate DC overvoltage, a two-stage voltage drop control scheme is proposed for offshore MMC to realize a fast active power reduction, by coordinating with a voltage-dependent active current control of individual wind turbines. The voltage drop depths are designed by considering the offshore de-loading efficiency and the stability of WTs. To improve the post-fault DC voltage recovery performance, an adaptive voltage rise control scheme is proposed to coordinate the recovery of onshore and offshore active power. The recovery trajectory of DC voltage is formulated and further employed to design the onshore active power ramp rate for uninterrupted operation of WTs. Case studies have been conducted on two test systems to validate the proposed method.

引用

页码：1606 / 1617

页数：12

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