DEVICE FOR FULL COMPENSATION OF FIRST SINGLE-PHASE SHORT-CIRCUIT CURRENT HARMONIC

摘要

The invention relates to electric engineering and can be used in high-voltage networks with a compensated neutral. A device for full compensation of the first single-phase short-circuit current harmonic comprises a ground-fault neutralizer, a transformer device for connection to the neutral, a phase controlled choke connected to a three-phase commutation device with a unit for selection of faulty phase comprising two groups having three commutation elements each, in each group the first terminals of commutation elements are connected to the windings of transformer device, the second terminals of commutation elements are connected to one another in the limit of the same group, the united second terminals of first group are connected to the first terminal of phase controlled choke. The transformer device for connection to the neutral is presented as a three-phase three-leg transformer having a neutral point lead of star-connected first winding and with secondary windings, one of which is a triangle-connected winding, the ground-fault neutralizer connected between said point of the primary winding and ground is provided with the secondary winding, one of leads of which is connected to the second terminal of phase-controlled choke, the second terminal - to another terminals of the second group of commutation elements, which are connected to one another. The technical result is reduction in material consumption due to reducing a power portion meant for compensation of an active component consumed for compensation of capacitive component providing in that way further reducing material consumption, improvement of adjustment dynamics due to damping mutual interaction of the capacitive and active components adjustment, as well as reduction of demands to .