电网技术2026，Vol.50Issue(9)：3544-3553,中插13-中插16,14.DOI:10.13335/j.1000-3673.pst.2025.0517
基于模块化多端口直流变换器的海上风电直流汇集拓扑研究
Research on Offshore Wind Power DC Collection Topology Based on Modular Multi-port DC Converter
摘要
Abstract
To handle unbalanced power during the series connection of offshore DC wind turbines,enable online switching,and achieve fault isolation,this paper proposes an offshore wind power DC networking topology based on a modular multi-port DC converter.The DC wind turbine achieves power collection and step-up of the output port voltage through the converter,reducing the number of power conversion stages and the offshore converter station.The power devices are shared between the converter sub-modules and the power balance circuit,lowering hardware costs and stabilizing the output port voltage despite wind speed fluctuations.Moreover,the converter can isolate faults on the high-or low-voltage side,enhancing system flexibility.This paper first analyzes the normal and fault operation conditions of series-connected offshore wind power DC collection systems and the power transmission principle of the DC converter.Subsequently,the control strategy for the proposed DC collection scheme is designed,and fault-isolation and fault-ride-through methods for wind turbines under high-and low-voltage-side faults are presented.Finally,a simulation model of offshore wind power collection system based on the modular multi-port DC converter is established to valid ate the effectiveness and feasibility of the proposed collection scheme.关键词
海上风电/直流汇集/直流变换器/功率平衡支路/故障隔离Key words
offshore wind power system/DC collection/DC converter/power balance circuit/fault isolation分类
信息技术与安全科学引用本文复制引用
王哲,付立军,刘飞,陈哲,黄阮明..基于模块化多端口直流变换器的海上风电直流汇集拓扑研究[J].电网技术,2026,50(9):3544-3553,中插13-中插16,14.基金项目
智能电网重大专项(2030)远海风电新型并网送出系统示范工程项目(2024ZD0801300).Project Supported by Smart Grid-National Science and Technology Major Project of Novel Grid-Integrated Transmission System for Far-Offshore Wind Power(2024ZD0801300). （2030）
