Aiming at the problems exposed by the dual-frequency method in the application of real ships,this paper proposes a line selection strategy that integrates the dual-frequency method and the leakage current comparison method,analyzes the leakage current relationship between each branch under the low-frequency signal at different frequencies and applies it to the problem of small resistance grounding line selection that cannot be solved by the dual-frequency method,analyzes the relationship between the size ordering of the leakage current of each branch and the size of the capacitance to the ground,and applies it to the problem of large resistance grounding line selection that cannot be solved by the dual-frequency method.When the grounding resistance is with-in the measurable range of the dual-frequency method,the method of measuring the insulation resistance of the branch is still used by the dual-frequency method for line selection.The simulation calculation of the Matlab/Simulink platform shows that the compre-hensive line selection technology is feasible.
关键词
双频法/漏电流比较法/小电阻接地/大电阻接地/综合选线
Key words
dual-frequency method/leakage current comparison method/small resistance grounding/large resistance grounding/comprehensive line selection
维普
万方数据