基于时基脉冲同步的变电站电压信号无线远传镜像装置设计

Design of Wireless Remote Transmission Mirroring Device for Substation Voltage Signals Based on Time-Based Pulse Synchronization

摘要: 本文在总结分析现有变电站现场高压试验提取电网PT参考电压方法的基础上，提出一种新型的基于时基脉冲同步的变电站电压信号无线远传镜像装置。该装置通过采集电网电压后，利用绝对时间的时机标注获取信号采集、处理和传输的时间差，通过脉冲离散方法将模拟信号脉冲化，以利于硬件电路的高精度锁相同步，利用脉冲数相移，实现时间差的同步，从而实现高精度跟踪和复原电网PT参考电压。精度检验实验和现场应用实践表明该系统完全满足国家电网公司企业标准Q/GDW540.1-2010《变电设备在线监测装置检验规范》要求。

Abstract: Based on the analysis and summary of existing methods for extracting grid PT reference voltage during on-site high-voltage tests in substations, this paper proposes a novel wireless remote mirroring device for substation voltage signals based on time-based pulse synchronization. After collecting grid voltage, this device utilizes absolute time stamping to obtain the time differences in signal acquisition, processing, and transmission. It converts analog signals into pulses through a pulse discretization method, facilitating high-precision phase-locked synchronization of the hardware circuit. By utilizing pulse number phase shift, it achieves synchronization of time differences, thereby realizing high-precision tracking and restoration of grid PT reference voltage. Accuracy testing experiments and field application practices have shown that this system fully meets the requirements of the enterprise standard Q/GDW540.1-2010 “Inspection Specification for Online Monitoring Devices of Substation Equipment” issued by the State Grid Corporation of China.