SYSTEM AND METHOD OF PROTECTION OF ELECTRIC POWER SYSTEM Russian patent published in 2015 - IPC H02H3/28 

FIELD: electricity.

SUBSTANCE: system contains a set of input power cables (4) for transmission of electric power from electric power generators (2), such as generators (2) driven by the wind energy, to an output cable (40), a set of protective equipment units (5, 50), each of which is designed with a possibility of placement at one of respective input cables (4) or at an output cable (40). Each input and output power cable (4, 40) is fitted with a respective tripping device (6, 60). And each protective equipment unit (5, 50) includes the measuring unit (51) for measurement of current and voltage of the cable (4, 40) and the control unit (53) which is quickly attached to the tripping device (6, 60) of the respective power cable (4, 40) to disconnect selectively the tripping device (6, 60) when the protection system finds differential short circuit. The system is intended for transmission of the electric power from the changing number of electric power generators (2) where the used power cables (4, 9, 11, 40) are changed. The protection system contains the charging current compensator (54) for compensation of differential protection and is designed with a possibility of regulation of compensation on the basis of the electric topology defined from the current use of power cables.

EFFECT: ensuring reliable protection in conditions of changing electric topology of a transmission system.

18 cl, 4 dwg