保护用电流互感器暂态误差测量分析系统研究

Study on the measuring and analysis system of protective current transformer transient error

电流互感器暂态过程描述了电网短路瞬间电流互感器状态,暂态误差值及相关波形,直接给出了电网继电保护瞬间的互感器状态,为电流互感器的开发、设计提供了大量的试验数据和波形。介绍一种基于数字记录记录卡和计算机技术的测量系统的软、硬件组成,阐述该系统具有测量精度高、测控功能强大、数据处理完善等优点。

The transient course of current transformer illustrates the condition of current transformer at a moment when power grid was in short circuit, that is, transient error value and its relevant waveforms describes directly the status of current transformer at a moment when power net relay took action, which provides a lot of testing data and waveforms and has a quite signification for development and design of current transformer. The software and hardware composition of measuring system based on digital recorder and computer technology was introduced, which has advantages of precious measuring, powerful monitoring function and perfect data processing in the paper.