双功能电流变送器的研究

提出一种适用于变电站集中式直流采样“变电站微机保护及监控系统”的双功能电流变送器，该变送器用于提供电力系统正常运行时和故障时电流量的数据采集；将正常电流的测量和故障电流的测量集于一体。该变送器主要特点是电路简单可靠、测量范围宽、响应速度快、精度高，既满足正常电流测量精度的要求，又满足故障时电流测量的灵敏度和快速性的要求。

Research of Current Transducer with Double Functions

A double function current transducer is presented in this paper.It transforms both normal AC current and fault AC current into a proportional DC voltage,which can be sampled by an integrated substation protection and monitoring system.The major characteristics of the new type transducer are that it has simple and reliable circuit structure,wide measuring range,fast response and high accuracy.It can satisfy both accuracy requirement for normal current measurement,and high sensitivity and fast response requirement for fault current measurement.