高压端信号取样隔离电路的研究

在对高压设备的电气参数进行测量时,由于现场环境较复杂,干扰源多,故对其信号取样隔离部分的抗干扰性能要求较高,其抗干扰性能好坏将直接影响测量结果的准确性。本文以测量高压设备的介质损耗为例,针对干扰特性设计了由差分平衡取样电路和光脉冲调制解调组成的隔离电路,使信号经取样隔离后具有较低的失真。

Study on the high voltage terminal''''s signals sampling and its isolation circuit

In electrical parameter measurement of high-voltage equipment,the anti-interfer-ence ability of sampling and isolation pa rt of high voltage terminal's signals is very im-portant because of the complex environment and lots of interference sources in locale.It affects accuracy of the result directly.This paper,taking the measurement of dielectric loss for e xample,designs a differentiate-balance sampling circuit and a light impulse mo d-de-mod circuit,which can bring signals of low-distortion after sampling an d isolation.