METHOD AND SYSTEM FOR DIFFERENTIALLY PROTECTING AN ELECTRICAL CONNECTION IN A MEDIUM, HIGH OR HIGH VOLTAGE NETWORK

摘要

The invention relates to a method and a system for the differential protection of an electrical connection (7) in a medium, high or very high voltage network. This method, in which two differential protection devices (8, 9) are arranged at both ends (A, B) of this connection (7), comprises a step during which a comparison is made between the locally measured current and the measured current. remote after resynchronization of these devices by shifting the data received from the end located at a distance of half of the propagation time go and return, and a second step during which, if there is an angular phase shift between two currents after resynchronization, performs automatic compensation by controlling the angle of the current vectors.