【摘要】 800 kV上海庙—临沂特高压直流输电工程受端（沂南换流站）配置有3台同步调相机，为换流站提供紧急动态无功支撑。近年来，山东省外同步调相机多次故障跳机，限制了同步调相机功能的发挥，须评估同步调相机故障对特高压直流输电的影响。基于PSACD仿真平台及现场设备实际参数，建立上海庙—临沂分层接入特高压直流输电工程的计算模型，评估了同步调相机甩负荷、失磁、出口短路故障及故障时同步调相机投运台数对特高压直流输电的影响，研究发现：甩负荷及失磁故障影响较小；升压变压器高压侧短路一般会导致直流换相失败，低压侧短路会导致直流功率大幅跌落但一般不会导致换相失败；同时投运2台及以上调相机可减少故障严重程度，加快故障恢复。研究结果可为现场有针对性地开展运维检修提供指导。更多还原

【Abstract】 The receiving end of ± 800 kV UHVDC transmission syntem from Shanghaimiao to Linyi is equipped with 3 synchronous condensers to provide emergency dynamic reactive power support.In recent years,the synchronous condenser has tripped for many times,which limits the function of the synchronous condenser.It is necessary to evaluate the impact of the synchronous condenser fault on UHVDC transmission. The simulation model of UHVDC transimission system with synchronous condensers was established based on the PSCAD software and the actual parameters of field equipment.The impacts of the load rejection,loss of excitation,short-circuit fault and the number synchronous condenser in operation on UHVDC transmission were evaluated.The research shows that the load rejection and loss of excitation have little impact on the UHVDC transimission system.The short circuit at the high voltage side of the step-up transformer will generally lead to UHVDC commutation failure,and the short circuit at the low voltage side will lead to a sharp drop in UHVDC power,but generally will not lead to commutation failure.When two or more cameras are put into operation at the same time,the severity of the fault can be reduced and the fault recovery can be accelerated.The research results can provide guidance for operation and maintenance.更多还原