Abstract：DC system is an important part of the safe operation of substation. The insulation selection test of dc system in transformer substation is an important part of the dc test, which can effectively verify that the insulation monitoring device installed in the dc system can alarm the reduced insulation dc load branch accurately when the insulation of the dc load branch is reduced. By designing simple and reasonable control circuit, ground busbar selection is realized by using change-over switch, and by grounding resistance adjustment and leakage current sensor wire clamp design, it is possible to improve the efficiency of transformer substation dc system insulation line selection test, reduce the risk of mistakenly touching the dc bus during the test, and achieve the ultimate goal of man-machine efficacy.
毛焱, 冯灿成. 一种变电站直流系统绝缘选线试验装置的研究与设计[J]. 电气技术, 2018, 19(11): 88-90.
Mao Yan, Feng Cancheng. Research and design of a test device for insulation selection of DC system in the transformer substation. Electrical Engineering, 2018, 19(11): 88-90.
2018, Vol. 19 
