METHOD FOR RELAY PROTECTION OF REMOTE BACKUP Russian patent published in 2017 - IPC H02H3/40 

FIELD: electricity.

SUBSTANCE: according to the method the currents and voltages are recorded at the beginning of a line, a transmission model of the line is used with the input in the place of observation and outputs in the branches, two-dimensional signals are generated, one for each branch, and ranges of operation are set in the plane of each two-dimensional signal. The transmission model is equipped with an additional output at the end of the line and with the main outputs to the load busbars of the branches, two-dimensional signals are shaped as complex measurements, additional measurement is defined for the end of the line and key measurements - for loads of the branches on the planes of all measurements protection locking areas are specified. The protection is locked if all measurements are displayed in the corresponding locking areas, otherwise the protection operation is triggered if at least one key measurement is displayed in the operation area.

EFFECT: increase in the sensitivity and expansion of the functionality of the remote backup method.

4 cl, 9 dwg