中国电机工程学报2026，Vol.46Issue(17)：6250-6262,中插9,14.DOI:10.13334/j.0258-8013.pcsee.251499
计及换流器矢量控制的海上风电柔性低频输电系统对称故障短路电流解析计算
Analytical Calculation of Symmetrical Fault Currents in Offshore Wind Power Flexible Low-frequency Transmission Systems Considering Converter Vector Control
摘要
Abstract
The fault transient characteristics of offshore wind farms interconnected via flexible low-frequency transmission systems are greatly affected by the converter control links.Existing fault current calculation methods neglect the converter control-induced transient processes,leading to significant errors.This poses challenges for setting protection device parameters and designing fault ride-through strategies.To address these issues,this paper proposes an analytical fault current calculation method that accounts for the vector control characteristics of both the grid-side converter(GSC)of wind turbines and the modular multilevel matrix converter(M3C)station.Firstly,equivalent source models incorporating the post-fault active regulation effects of the converters are developed.Secondly,to resolve the coupling problem of fault currents from the two converter sides at the fault resistance,this paper implements an effective system decoupling strategy based on partitioned calculations.To address the coupling issue between the d-and q-axis components of the M3C low-frequency side fault current,this paper also proposes a novel method employing common-factor-based decoupling operations,which enables the analytical calculation of the M3C station dq-axis currents,accurately capturing the transient response of its dual-loop control systems.Finally,the model is built on both the PSCAD/EMTDC simulation platform and the RTDS experimental platform.The simulation and experimental results validate the accuracy of the proposed method.Furthermore,the comparison with existing fault analytical calculation methods demonstrates the superiority of the proposed approach.关键词
海上风电/低频输电/模块化多电平矩阵换流器/故障电流/等效电源/公共因子Key words
offshore wind power/low-frequency transmission/modular multilevel matrix converter(M3C)/fault current/equivalent power source/common factor分类
信息技术与安全科学引用本文复制引用
向念文,程海龙,邵冰冰,王书来,田宇,韩彬,赵国亮,刘宗烨..计及换流器矢量控制的海上风电柔性低频输电系统对称故障短路电流解析计算[J].中国电机工程学报,2026,46(17):6250-6262,中插9,14.基金项目
国家重点研发计划项目(2021YFB2401100) （2021YFB2401100）
国家电网有限公司科技项目(5211DS22002C) （5211DS22002C）
中央高校基本科研业务费专项资金项目(JZ2024HGTB0230). National Key R&D Program of China(2021YFB2401100) （JZ2024HGTB0230）
Science and Technology Project of State Grid Corporation of China(5211DS22002C) （5211DS22002C）
Fundamental Research Funds for the Central Universities(JZ2024HGTB0230). （JZ2024HGTB0230）
