高电压技术2026，Vol.52Issue(9)：4070-4080,中插4-中插8,16.DOI:10.13336/j.1003-6520.hve.20260496
联网与孤岛场景下MMC差异化暂态穿越策略及仿真验证
Differential Transient Ride-through Strategies and Simulation Verification for MMC in Grid-connected and Islanded Scenarios
摘要
Abstract
With the widespread application of voltage source converter HVDC transmission technology,its safe ride-through capability under AC transient disturbances faces severe challenges.This paper focuses on two typical sce-narios:grid-connected transmission and isolated renewable energy transmission.First,the differentiated ride-through requirements of the two scenarios are analyzed in terms of overcurrent suppression,short-circuit current control,module overvoltage suppression,and mid-to-high-frequency resonance suppression risks.It is revealed that,when the grid im-pedance angle approaches 90°,the transient short-circuit current of the converter is mainly dominated by reactive current components.The ride-through strategies for differentiated scenarios are studied,and the impacts of fault detection,se-quence decomposition,phase-locked loop dynamics,and voltage feedforward on ride-through performance are elucidated.An RTDS real-time simulation platform was established based on China first 66 kV offshore wind HVDC project,verify-ing the effectiveness of the proposed strategy:during onshore station faults,reactive power support can be rapidly provided within 20 ms,and during offshore station faults at the 66 kV side,the fault current can be significantly sup-pressed to 9 kA.This study provides a theoretical basis and practical reference for the transient safety design of flexible DC systems in different application scenarios.关键词
柔性直流/交流扰动/短路电流/故障穿越/暂态稳定/无功支撑Key words
voltage source converter-HVDC/AC disturbance/short-circuit current/fault ride-through/transient stability/reactive power support引用本文复制引用
邹凯凯,殷子寒,杨志强,邹强,卢宇,王仙荣..联网与孤岛场景下MMC差异化暂态穿越策略及仿真验证[J].高电压技术,2026,52(9):4070-4080,中插4-中插8,16.基金项目
国家重点研发计划(2023YFB2405900).Project supported by National Key R&D Program of China(2023YFB2405900). （2023YFB2405900）
