35 kV数字变电站合并单元模拟信号采集卡研究

摘要

针对35 kV变电站的互感器输出信号的特性，设计了一种模拟信号采集卡。该卡分别为电子式互感器输出模拟小信号和传统互感器模拟信号设计采集电路，对多通道模拟数据同步采集。通过实验验证了其功能的正确性，还可满足合并单元数据采集设计精度的要求。%An analog signal acquisition card is designed for the output signal of 35kV substation.The acquisi-tion circuits for small analog signal from the electronic transformer and analog signal from the traditional transformer are designed respectively to receive multi-channel analog signals simultaneously .Experiments verify the correctness of its functions , and show that the card fully meets the design requirements of precision data acquisition of the mer -ging unit .