考虑大规模新能源并网的多端柔直系统故障处理技术归纳与展望

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关键词：直流输电；MTDC；故障穿越；直流侧故障；交流侧故障 DOI：10.15938/j. emc.2025.11.016 中图分类号：TM72 文献标志码：A 文章编号：1007-449X（2025）11-0168-17

Induction and prospects of fault processing technology considering large-scale renewable energy integration in MTDC systems

LIU Yiqi1， WU Yucheng²， YIN Laicheng¹，LI Binbin³， ZHANG Zhenbin4，LI Tan5 （1.ColegeofomputerandControlEnginering，NortheastForestryUniversity，Harbin150040，China;2.CollgeofMecanical andElectricalEngineering，NortheastForestry University，Harbn15Oo40，China;3.SchoolofElectrical Engneeringand Automation，Harbin Instituteof Technology，Harbin15oo1，China;4.ScholofElectricalEnginering，ShandongUniversity， Jinan 25010，China;5.State Grid Economic and Technological Research Institute Co.，Ltd.，Beijing 102211，China）

Abstract：Considering the backdrop of large-scale cross-regional integration of renewable energy，multiterminal flexible direct current （MTDC）transmission systems are widely used. Within this context，enhancing the reliability of inter-regional energy support and ensuring stable power transmission have become critical for guaranteeing the long-term safe and reliable operation of MTDC systems. Fault issues were proposed on both the AC and DC sides of interface converters within MTDC systems，and existing fault-handling strategies were analyzed from multiple perspectives，including converter self-clearing technology，high-voltage DC circuit breaker technology，multi-device coordinated control，output power suppression，and surplus energy dissipation techniques. Furthermore， a comparative analysis was conducted on the advantages and disadvantages of these fault-handling methods in terms of hardware cost，applicability，and operational conditions. Finally，the key technical challenges were summarized in AC/DC fault handling and future research prospects were presented， providing valuable technical insights for the continued development of MTDC system fault management technologies.

KeyWords：high voltage direct current transmission；multi-terminal direct current;； fault ride-through ; DC-side fault; AC-side fault

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面向“双碳”目标，发展绿色、低碳、可再生能源，加速能源转型势在必行[1-3]。（剩余34509字）