基于路由采样时基同步的电子式互感器数字输出校验方法  

Calibration System of Electronic Transformers with Digital Output Based on the Routed Sample Clock

作　　者：宋涛[1,2] 

机构地区：[1]淄博职业学院电子电气工程学院,淄博255314 [2]华中科技大学电气与电子工程学院,武汉430074

出　　处：《高压电器》2013年第9期19-22,27,共5页High Voltage Apparatus

基　　金：山东省科技发展计划项目(2011GGA03213);山东省高等学校科技计划项目(J12LN93)~~

摘　　要：随着智能电网的建设,对数字化变电站内统一时钟的要求越来越高,而不同的同步源对电子式互感器校验准确度的影响也不相同。另外,标准通道模拟信号的高精度数字化采样及合并单元的数据帧捕获也是影响电子式互感器数字输出校验系统精度的关键因素,而目前的研究并没有充分考虑到这些因素。故笔者提出了一种基于路由采样时基同步的电子式互感器数字输出校验方法。该办法采用24位A/D转换器保证了标准通道采集单元的高精度和宽动态范围且路由采样时基的新颖同步方法将同步误差控制在纳秒级。系统校准验证了该办法的有效性,现场实际校验证明该系统可靠性强、精度高、易操作。Calibration system with digital output is realized by construction of standard channel, digital processing of standard channel,receiving the digital output of MU synchronous. But these factors are not fully considered in current researches. So a calibration system with digital output is proposed in this paper. Precision and dynamic range are guaranteed by A/D converter with 24 resolution and synchronization error limit is nanosecond by using the novelty synchronization method based on the routed sample clock. To verify effectiveness,error calibration was carried out in the State Grid Electric Power Research Institute of China and results show that the proposed system can reach the precision class up to 0.05. Actual calibration shows that the system has high-accuracy and strong antiinterfere ability.

关 键 词：数字输出校验方法 路由采样时基 同步方法 数据帧捕获 

分 类 号：TM45[电气工程—电器]