基于智能平衡桥的直流系统绝缘监测

当前直流电源系统绝缘监测采用的是电压平衡桥原理,但由于电缆、设备老化造成对地电压失衡,从而影响绝缘监测装置监测对地电阻的精度.本文设计智能平衡桥装置,通过自动投切等效网络电阻,可解决常规平衡桥存在失衡的缺陷.

Insulation monitoring for DCsystem based on intelligent balance bridge

The DC power system insulation monitoring using the principle of voltage balance bridge,but due to the aging of the cable and equipment,often cause of voltage imbalance,thus affecting the insulation monitoring devices,monitoring of resistance of precision.In this paper,we design an intelligent balance bridge device,which can solve the problem of the balance by automatically switching the equivalent network resistance.