基于同步差分信号采样的计量远程校验装置优化设计

Optimum Design of Remote Calibration Device for Metrology Based on Synchronized Differential Signal Sampling

针对计量装置在线校验监测可靠性和精准性的问题,将数字总线的同步采样技术应用到计量装置状态监测系统,设计了基于数字总线的PT/CT二次侧采集终端、线路切换终端、线路控制箱等模块;通过改变计量装置在线状态监测采样模式,不但可以实现远程校验的精确性,而且可解决原有应用存在的施工成本高、布线复杂的难题,同时可为数字总线同步采样技术融入智能变电站的一体化状态监测提供研究基础,以及为计量装置的状态监测技术进一步规范化提供参考依据。

Aiming at the problem of reliability and precision of on-line calibration monitoring of metering device,this paper applies the synchronous sampling technology of digital bus to the condition monitoring system of metering device,and designed the modules of PT/CT two-side acquisition terminal,line switching terminal,line control box and so on based on digital bus.By changing the on-line condition monitoring sampling mode of metering device,it can not only realize the accuracy of remote calibration,but also solve the difficult problem of high construction cost and complicated wiring in the original application.This study can provide a research basis for the integration of digital bus synchronous sampling technology into the integrated state monitoring of intelligent substation,and can also provide reference for the further standardization of the condition monitoring technology of metering device.