采用了一种常态下利用双不对称电桥实时监测直流系统绝缘的方法，解决了正负母线绝缘均按比例下降时失效的问题。

A new method is adopted to real-timely monitor DC system insulation, which applies double asymmetrical Bridges to keep it effective when positive and negative pole insulations drop in same proportion.

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本文采用了一种常态下利用双不对称电桥实时监测直流系统绝缘的方法，解决了上述问题。目前广泛使用的低频信号注入法容易受到直流系统支路中存在的对地分布电容的影响。

A new method of monitoring real-timely for DC system insulation using double asymmetrical Bridges in normal mode is adopted in this paper, and the shortcomings of symmetrical bridge are overcome.

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