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DEVICE FOR compensate for capacitive currents at single-phase ground fault in electrical networks with isolated neutral
DEVICE FOR compensate for capacitive currents at single-phase ground fault in electrical networks with isolated neutral
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机译：具有隔离中性线的电网中单相接地故障时的电容性电流补偿装置
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摘要
The invention relates to the field of electrical and electric power, in particular to the payment means of capacitive currents in single-phase earth faults in electric networks with isolated neutral. The aim of the proposed invention is to increase the accuracy of the capacitive currents in single-phase earth fault and the range extension device parameter changes. An apparatus for compensating capacitive currents at single-phase earth faults in electric networks with isolated neutral, comprising three windings, each of which is located on a separate rod of magnetic material, connected on a "star" or "zigzag" whose inputs are each connected to their corresponding mains phase conductor and the neutral point is connected to the input of the fourth coil with variable inductance disposed on the fourth rod of magnetic material with air gaps, the output h tvertoy winding connected to ground, all four yokes rod connected with one and with the other hand. The new device is that, firstly, the yoke connecting rods of the first three windings are joined as two symmetrical three-prong stars at an angle of 120 degrees relative to each other, and a fourth connecting rod yoke joining place; secondly, the fourth coil connected in parallel alternating active and reactive (inductive or capacitive) impedance; third, the fourth reel is provided with taps, and the variable-reactance actively through the switching device connected in parallel to the fourth part of the turns of the coil; Fourthly, on the fourth rod placed fifth additional coil, and the conclusions of the coils in parallel with it including the second variable-reactance actively.
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