针对主动配电网中某些智能终端异常，导致保护失效的问题，提出一种适用于智能终端异常的配电网自适应保护方法。该方法根据各智能终端（STU）量测到的开关量和电流量，对开关的通断和各STU的运行状态进行判断。设计了一种适用于线路和环网柜的自适应保护方案与判据，在STU异常的情况下，分别对传统区域保护和自适应保护进行分析。通过PSCAD仿真软件对本文所提方法进行验证。结果表明该方法可有效应对STU异常导致保护失效的情况。

Aiming at the problem of protection failure caused by abnormal intelligent terminals in active distribution network, an adaptive protection method for distribution network with abnormal intelligent terminals is proposed. This method judges the on-off of the switch and the running state of each smart terminal unit (STU) according to the measured switching and current of each STU. An adaptive protection scheme and criterion suitable for line and ring network cabinet are designed. In the case of abnormal STU, the traditional regional protection and adaptive protection are analyzed respectively. The method proposed in this paper is verified by PSCAD simulation software. The results show that the method can effectively deal with the protection failure caused by STU abnormality.

基于换流器与电网控制保护协同的直流配电网保护及故障恢复策略研究（52107098）