Neutral-point earth-free distributing network direct-to-ground capacitance current measuring method
A technology of capacitive current to ground and ungrounded neutral point. It is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables. It can solve the problems of short-circuit impedance test accuracy and achieve accurate measurement results.
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[0020] see figure 1 , figure 1 It is a wiring diagram for implementing the present invention by using the substation busbar voltage transformer and the ground-to-ground capacitance current measuring instrument 4 of the neutral point ungrounded distribution network. Substation bus voltage transformer consists of primary winding 1 and secondary winding 2,3. The three windings are all three-phase windings, and the primary winding 1 is a star-connected winding, that is, its first end is connected to the three-phase busbar 5 of the distribution network, and the tail end is connected to the ground after star-shaped connection. The secondary winding 2 is a star-connected winding, the ends of the three-phase windings are connected together, and the first and last ends of the a-phase winding are respectively connected to the two voltage signal input terminals of the measuring instrument 4; the secondary winding 3 is an open delta connection, that is The first and last phases of the t...
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