中文摘要：

灵活交流输电（FAcTS）技术的利用能够对电力系统可靠性产生重要影响．晶闸管控制的移相器（TCPST）和串联补偿器（TCSC）作为串联FACTS设备能够改变电力潮流的自然分布和有效缓解输电阻塞，静止无功补偿器（SVC）作为并联FACTS设备能提供无功支持和维持系统电压稳定，将它们对电力系统可靠性的影响进行了定量评估．研究了TCPST、TCSC的潮流计算模型以及计及TCPST、TC．SC和SVC的最优负荷削减模型，从而将FACTS设备有效纳入可靠性评估模型中．提出的方法在RBTS可靠性测试系统上进行了验证，计算结果表明FACTS设备能对系统可靠性产生重大改善作用．

英文摘要：

The utilization of Flexible AC Transimssion System（FACTS） technology has significant impact on power system reliability performance. Series FACTS devices such as Thyristor Controlled Phase Shifting Transformers （TCPSTs） and Thyristor Controlled Series Compensators（TCSCs） can change the natural allocation of the power flow and effectively alleviate transmission congestion. Parallel FACTS devices such as Static Var Compensators（SVCs） can provide reactive power support and maintain voltage stability. So it is important to quantitatively evaluate their benefits to the power system reliability. The traditional models of the composite generation and transmission system reliability evaluation are mainly focused on conventional generation and transmission facilities. This paper researches the power flow model of TCPST and TCSC, and then presents the optimal load shedding model incorporating TCPSTs,TCSCs and SVCs and effectively incorporates them into the reliability evaluation model. The proposed method is tested on the RBTS and the obtained results show that the system reliability can be improved effectually by FACTS devices.