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基于分时长期演进(TD-LTE)4G无线通信技术,研究了TD-LTE帧同步工作机制,将绝对时间与TD-LTE系统同步帧结构映射,提出了一种基于TD-LTE帧同步的电网时间同步方法,设计了时延补偿机制,以修正无线传播多路径造成的时延偏差,提高授时精度.通过搭建试验平台实测分析,验证了该方法的可行性,无线授时系统的时间同步精度可达亚微秒量级,可满足配电网各类业务需求.
Based on time-division-long-term evolution (TD-LTE) 4G wireless communication technology, the working mechanism of TD-LTE frame synchronization is studied and the absolute time is mapped with the synchronization frame structure of TD-LTE system. A TD-LTE frame synchronization based power grid Time synchronization method, a delay compensation mechanism is designed to correct the delay deviation caused by multipath propagation and improve the timing accuracy.Through the test and analysis of the test platform, the feasibility of this method is verified, and the time synchronization accuracy of the wireless timing system Delta microsecond magnitude, to meet the needs of various types of distribution network business.