METHOD OF REMOTE PROTECTION OF OVERHEAD POWER LINE Russian patent published in 2015 - IPC H02H3/40 G01R31/08 

FIELD: machine building.

SUBSTANCE: according to the method the active and reactive resistances are measured to the short circuit point as per emergency values of current, voltage, and angular displacement between them at the moment of voltage occurrence. With setpoints the distance between place of protection installation and short circuit point is compared, it is determined based on weighed averaging of distance evaluations received considering changes of active and reactive resistances. Upon smooth change of the operation mode parameters of the line the protection is disabled until protection enabling upon reset of short-term operation mode of the power transmission line. Change of the mode parameters is registered as per changes of sign of the distance between the protection installation point and short circuit point. Additionally based on the emergency values of current, voltage and angle of displacement between them at least one procedure of damage point determination of the power transmission lien is made with reception of the distance evaluations to the shirt circuit point. The weighed average evaluation or evaluation is provided for the distance between the protection installation point and shirt circuit point.

EFFECT: improved operation stability of the remote protection.

1 dwg