摘要
针对发电厂、变电所中直流系统绝缘监测及接地故障支路的查找，提出两种新方法双不对称电桥法和支路电容补偿法，前者采用双不对称电桥定量监测各种情况下直流系统的绝缘状况，有效地解决了正负绝缘都下降时不能正确监测系统绝缘的问题，后者采用补偿各支路对地电容的方法，解决了当支路对地电容较大时，准确查找接地支路的问题。研制出了基于新原理的、由单片机控制的自动装置。
In this paper, the author proposes two kinds of new technique, double unbalances electric bridges and sub-wire capacity compensation, for monitoring DC system insulation and locating grounding faults in power plants and substations. The former quantitatively monitors the insulation status of a DC system in all circumstances by means of double unbalance electric bridges, thus effectively solves the problem of inaccurate monitoring of the DC system insulation at the time when insulation of both the positive and negative buses decreases; while the latter through compensating sub-wire capacity, solves the problem as how to accurately locate the grounding faults when sub-wire earth capacity becomes comparatively large. Considering these new principals, an automatic device controlled by a single chip processor is developed.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
1998年第1期96-100,共5页
Journal of North China Electric Power University：Natural Science Edition
