北斗RNSS授时技术在智能电网雷电定位系统中的应用

doi:10.11959/j.issn.1000-0801.2019032

Abstract

Abstract:

The smart grid lightning location system is an important power service,and its lightning location accuracy largely depends on the accuracy of time synchronization.Three kinds of BeiDou timing methods were studied and compared,and the RNSS timing method was found to be most suitable for lightning location systems.Furthermore,the principle and characteristics of RNSS timing were studied,and a low-cost user terminal timing hardware and software architecture and algorithm were proposed.The Kalman filter-based BeiDou second pulse signal was used to calibrate the user clock and adjust the voltage through the PID algorithm.The temperature-controlled crystal oscillator made the deviation between the user terminal time and the GNSS time below 100 ns at any time to meet the accuracy requirements of the lightning positioning system.

Key words: BeiDou, RNSS, timing, smart gird, lightning locating, time synchronization

CLC Number:

TN927

Hao ZHANG,Hongzhen YANG,Weiping SHAO,Jiming YAO. Application of BeiDou RNSS timing technology in smart grid lightning locating system[J]. Telecommunications Science, 2019, 35(2): 134-141.

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References 3

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	RDSS单向授时	RDSS双向授时	RNSS授时
授时精度/ns	100.6	10.8	23.7
可用范围	区域地区	区域地区	全球
前提条件	位置已知	无	无
首次授时时间	快	快	需要首先定位
连续性	连续授时	间断授时	连续授时
用户机功率	小	要求发射射频信号，功率大	小
动态范围	静止用户	较低动态	高动态
用户数目	无限制	受系统容量限制	无限制
保密性	较差	较差	高

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Application of BeiDou RNSS timing technology in smart grid lightning locating system

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