特高压混合多端直流系统故障退站后处置方法研究

Research on disposal methods of station disconnection caused by UHV hybrid multi-terminal HVDC system fault

本文结合工程运维经验,以±800kV昆柳龙特高压混合多端直流工程为例,介绍多端直流系统运行接线方式,分析多端直流系统故障退站后进入不同运行方式的处置流程,并说明不同处置措施下的直流输送能力变化及负荷损失程度,以期为相关技术人员在多端直流工程现场运维过程中处置退站故障提供参考。

Based on the experience of engineering operation and maintenance,taking±800kV Kunliulong ultra high voltage(UHV)hybrid multi-terminal DC project as an example,this paper introduces the multi-terminal DC operation wiring mode,analyzes the multi-terminal DC fault and different operation modes after exiting the station.The change of DC transmission capacity and the degree of load loss under different disposal methods are described,which can provide preference for the disposal of outgoing faults in the on-site operation and maintenance of multi-terminal DC.