ELECTRICITY TRANSMISSION LINE DISTANCE PROTECTION METHOD Russian patent published in 2017 - IPC H02H3/40 

FIELD: electricity.

SUBSTANCE: according to the method, the complex quantity input convert the second voltages groups and currents which further convert in the third voltage and third currents in the model of the undamaged part of the line; form the first triphase complex power of the first voltage and second currents, and a second similar power of the third voltages and currents; form a universal protection measurement as a ratio of the second triphase power to the first one and characterize the protection operation on a plan of this measurement and trigger the execution unit in case when the complex measurement is in a range of the specified operating characteristic area. With regard to the above mentioned, the first values refer to the current mode setting of the power transmission. The second values are the emergency currents components and voltages. The third voltage values is the result of the first values conversion, and the third currents is the result of the second values conversion.

EFFECT: protection sense ability increase with regard to a shunt fault in the protected zone.

12 dwg, 1 tbl