变电站时间同步及监测技术研究与应用

The technical research and application of time synchronism and monitoring in substation

电力系统安全稳定运行离不开各种自动控制设备,因此为自动控制设备提供参考时间的时间同步装置得到广泛应用,而且由早期分散独立的GPS对时装置发展到目前的冗余配置的全站统一对时系统,更先进的还有局部区域组成时间同步网。电网时间的偏差,对电力系统内的相位比较、故障记录、事件顺序排查等工作造成严重威胁。文章研究了不同技术路线的时间监测技术和应用方案,提出了采用直接测量的精准监测来实现高竞速的时间监测,更好地保障电力设备之间的时间同步准确度,确保相位测量、线路故障定位和电力系统事件顺序记录时间的精准,为电力系统的稳定可靠运行提供技术支撑。

Varies automation devices based the technical of computer and communication are widely used in electric power system to ensure the safety and economy operation of power grid, those devices can not operate normally without unified time reference. The time de- viation will have big threaten to works of phase comparing, fault recording and events sequence analysis. Based on the analysis of different time monitoring technical solutions, the precise time monitoring will assure the time synchronization among power equipment, and assure the accuracy of faulty point distance measurement of power transmission line and verification of power system parameters, improve the ability of power system faulty analysis and stable controlling level, and guarantee the safety operation of power grid in final.