Rapid deexcitation system for synchronous machines with...

H - Electricity – 02 – P

Patent

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Details

H02P 9/12 (2006.01) H02K 19/38 (2006.01)

Patent

CA 2751943

The invention relates to a rapid deexcitation system for synchronous machines (1) with indirect excitation by means of an excitation machine (2) and rotating rectifier bridge (8) comprising: - a deexcitation impedance (10) connected between the field winding (5) of the synchronous machine (1) and the rotating rectifier bridge (8); - a controller (9) connected in parallel with the deexcitation impedance (10); - a control circuit (11) of the controller (9) configured to: .cndot. keep the controller (9) closed such that the rotating rectifier bridge (8) directly feeds the field winding (5) of the synchronous machine (1) during normal operation of the synchronous machine (1); .cndot. open the controller (9) such that the deexcitation impedance (10) remains in series with the field winding (5) and with the rotating rectifier bridge (8) when the synchronous machine is to be deexcited.

La présente invention concerne un système de désexcitation rapide pour machines synchrones (1) à excitation indirecte au moyen d'une machine excitatrice (2) et d'un pont redresseur rotatif (8). Le système de désexcitation comprend: - une impédance de désexcitation (10) connectée entre l'enroulement inducteur (5) de la machine synchrone (1) et le pont redresseur rotatif (8); - un élément de manoeuvre (9) connecté en parallèle à l'impédance de désexcitation (10); - un circuit de commande (11) de l'élément de manoeuvre (9) conçu pour: en fonctionnement normal de la machine synchrone (1), maintenir l'élément de manoeuvre (9) fermé de sorte que le pont redresseur rotatif (8) alimente directement l'enroulement inducteur (5) de la machine synchrone (1); ou, lorsqu'il est nécessaire de désexciter la machine synchrone, ouvrir l'élément de manoeuvre (9) de sorte que l'impédance de désexcitation (10) reste connectée en série à l'enroulement inducteur (5) et au pont redresseur rotatif (8).

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