CALCULATION SYSTEM OF AN ELECTRICAL MAGNITUDE, TRANSFORMATION STATION INCLUDING SUCH A SYSTEM AND CALCULATION PROCESS OF AN ELECTRICAL MAGNITUDE WITH SUCH A SYSTEM

摘要

This calculation system (20) is suitable for calculating an electrical quantity relating to an electrical installation comprising several secondary electrical conductors (42A, .., 48C) electrically connected to a primary electrical conductor (34; 36; 38). The system includes a first module (60) having a radio transmitter (70) and a plurality of second modules (62A, 62B, 62C). These second modules include a radio transceiver (86A, 86B, 86C) and a sensor (83A, 83B, 83C) of the intensity (IA1, IA2, IA3, IB1, IB2, IB3, IC1, IC2, IC3) of the current flowing in a corresponding conductor among the primary and secondary conductors. The first module comprises first means (72, 74) for transmitting, to each second module, a first time synchronization message (M1). Each second module comprises first means (84A, 88A; 84B, 88B; 84C, 88C) for receiving the first message (M1) and second transmission means (84A, ... 88C), intended for a third module (63), of a second message (M2A, M2B, M2C) containing at least one value of the intensity measured by the corresponding current sensor. The intensity values are measured almost simultaneously, preferably with a synchronization error margin of less than s, and the third module comprises a radio receiver (101), second means (102, 104) for receiving the second messages. (M2A, M2B, M2C) and a member for calculating (104) the electrical quantity from the intensity values received via said second messages.