柔性交流输电系统交直流潮流可靠性评估模型

摘要

Base on the principles of thyristor controlled series compensator (TCSC) .thyristor controlled phase shifting transformers (TCPST) and unified power flow controller (UPFC), a reliability evaluation model of flexible AC transmission system by AC and DC power flow were proposed in the paper. Analyzed and tested with RBTS adopt state enumerative method, results show that AC power flow model can accurately evaluate the system reliability incorporating FACTS devices, and DC power flow model costs less computing time. When the node voltage constraint isn't rigid, the system reliability incorporating FACTS devices by AC power flow model and DC power flow model are similar.%根据串联补偿器(TCSC)、晶闸管控制移相器(TCPST)和统一潮流控制器(UPFC)的工作原理,从交流和直流潮流的视角建立了潮流计算和最优负荷削减模型,采用状态枚举法在RBTS可靠性测试系统中进行分析和验证,结果表明采用交流潮流模型能更准确评估FACTS元件对系统可靠性的影响；而直流潮流模型计算耗时较少,且当节点电压约束不是刚性约束时,所得结果与交流潮流模型结果相近.