【摘要】 利用基于实际法建立的RAZFE型距离保护的仿真软件，对含有统一潮流控制器（UPFC）的交流系统进行了仿真计算；并通过设置不同类型的故障，将此系统与普通的交流输电系统继电保护装置的动作行为进行分析比较，发现UPFC安装在保护线路的背后时，保护动作信息将有所变化，但不影响保护的正确动作。这种将保护装置的数字仿真与含有UPFC的FACTS系统的数字仿真相结合的方式，为研究FACTS元件对输电系统原有继电保护的影响提供了一条新的途径。更多还原

【Abstract】 Based on a simulation software of the type RAZFE distance protection. this paper makes a lot of simulatingcalculation for system with unified power flow controller under different faults. The comparison of the relay’s behaviorsbetween the ordinary AC system and the system with UPFC shows that the correctness of protection operation is notinfluenced due to changes of operating signal resulted from UPFC when the UPFC is located behlnd the position of theprotection. The method combines the digital simulation of protection equipment with the dlgital simulation of FACTS withUPFC. It gives a new way to analyze the effect of FACTS on power system protection.更多还原