H - Electricity – 02 – H
Patent
H - Electricity
02
H
H02H 3/30 (2006.01) H02H 1/00 (2006.01)
Patent
CA 2730375
The invention relates to a method and a system for the differential protection of an electrical link (7) in a medium-voltage, high-voltage or very high-voltage network. This method, in which two differential protection devices (8, 9) are placed at the two ends (A, B) of this link (7), includes a step during which a comparison is made between the locally measured current and the remotely measured current after these devices have been resynchronized by shifting the data received from the remotely located end by half the round-trip propagation time, and a second step during which, if an angular phase shift between two currents is observed after resynchronization, an automatic compensation is carried out by controlling the angle of the current vectors.
L' invention concerne une procédé et un système de protection différentielle d'une liaison électrique (7) dans un réseau moyenne, haute ou très haute tension. Ce procédé, dans lequel deux dispositifs de protection différentielle (8, 9) sont disposés aux deux extrémités (A, B) de cette liaison (7), comprend une étape pendant laquelle on effectue une comparaison entre le courant mesuré localement et le courant mesuré à distance après resynchronisation de ces dispositifs en décalant les données reçues de l'extrémité située à distance de la moitié du temps de propagation aller+retour, et une seconde étape pendant laquelle, si on constate un déphasage angulaire entre deux courants après resynchronisation, on réalise une compensation automatique par asservissement de l'angle des vecteurs courant.
Areva T&d Protection & Controle
Fasken Martineau Dumoulin Llp
LandOfFree
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