COMPENSATION-BALUN Russian patent published in 2017 - IPC H02J3/18 

FIELD: electricity.

SUBSTANCE: area of use: the invention relates to the protection of the electric lines from accidents, namely to the automatic compensation of capacitive earth fault currents of 6-10 kV with neutral earthed through an adjustable arc suppression reactor, as well as in networks with combined neutral grounding with the same arc suppression reactor. The invention can be used to automatically adjust the arc suppression reactor inductance by phase method in response to the capacity of the distribution network and for natural network asymmetry compensation in the normal network operation. Substance of the invention: the compensation-balun includes adjustable arc suppression reactor 1 connected to the phase network neutral and device 2 of the natural network asymmetry compensation. Arc suppression reactor 1 is made with control winding 3 and signal winding 4. Device output 2 is connected to control winding 3 of arc suppression reactor 1, and the input - to the neutral conductor and to phases "A", "B", "C" of network 5 380 V 50 Hz used for their own needs. Phase current or total current of two phases is introduced, when the source of the artificial neutral displacement is disabled through the current regulator in device 2 to the zero sequence circuit through the control reactor winding. Current controllers in device 2 are identical.

EFFECT: creating a universal device that allows to perform natural network asymmetry compensation without the device rework in a wide range of variations; the possibility of actual current regulating of natural network asymmetry without disconnecting the arc suppression reactor from the network; improving the accuracy and reliability of the compensation results; increasing the stability of the neutral voltage displacement and ensuring the sustainability of the automation in devices for automatic capacitive earth fault current compensation using the phase or amplitude adjustment principle of the arc suppression reactor.

2 cl, 1 dwg