AUTOMATIC ADJUSTMENT METHOD OF ARC-SUPPRESSION REACTION COIL Russian patent published in 2014 - IPC H02H3/17 

FIELD: electricity.

SUBSTANCE: method consists in creation on a network neutral in its normal operating mode of an artificial potential from a generator of variable non-industrial frequency and measurement of parameters of the outline of zero network sequence based on the found frequency of resonance of fixed inductance of a reaction coil with the network capacity, and at occurrence of single-phase fault to ground - in recording of a measurement result, deactivation of the variable frequency generator and resonant adjustment of an arc-suppression reaction coil in compliance with the results of the last measurement, supplemented by the fact that as an arc-suppression reaction coil there used is a single-phase controlled reaction coil of a transformer type with short-circuit voltage of 100% between windings, and its resonant adjustment in the single-phase short-circuit mode in compliance with the earlier found values of capacitance current of the network is performed by selection of the required inductance resistance at outputs of secondary winding by means of a switchboard and a set of sufficient amount of resistances with values pro rata to the first numbers of ascending power series 2n, which can be connected to outputs of secondary winding of the reaction coil in series with possibility of shunting with the corresponding switch of the switchboard of any of them.

EFFECT: improving accuracy and quick action of adjustment of ASRC, including in modes of arcing short circuits, at simultaneous provision of harmonicity of compensation current.

3 dwg