SYSTEM FOR CALCULATING ELECTRIC QUANTITY, TRANSFORMER SUB-STATION COMPRISING SUCH SYSTEM AND METHOD FOR CALCULATING ELECTRIC QUANTITY WITH SUCH SYSTEM Russian patent published in 2018 - IPC G01R19/25 

FIELD: measurement; test.

SUBSTANCE: invention relates to electrical measuring equipment. Calculation system (20) is configured to calculate an electrical quantity associated with electrical equipment, comprising several secondary electrical conductors (42A, …, 48C) electrically connected to a primary electrical conductor (34; 36; 38). System comprises first module (60) including wireless transmitter (70) and a plurality of second modules (62A, 62B, 62C), each comprising wireless transceiver (86A, 86B, 86C) current (IA1, IA2, IA3, IB1, IB2, IB3, IC1, IC2, IC3) sensor (83A, 83B, 83C) for measuring current flowing in the corresponding conductor among the primary and secondary electrical conductors. First module comprises first transmission means (72, 74) for sending to each second module first time synchronisation message (M1). Each second module includes first means (84A, 88A; 84B, 88B; 84C, 88C) for receiving first synchronisation message (M1) and second transmission means (84A, 88C) for sending second message (M2A, M2B, M2C) containing at least one current intensity value measured by the corresponding current sensor to third module (63).

EFFECT: current values are measured almost simultaneously, preferably with a synchronisation error of less than 10 mcs, and the third module comprises wireless receiver (101), second means (102, 104) for receiving second messages (M2A, M2B, M2C) and electric quantity calculator (104) based on almost simultaneously measured current values obtained in said second messages.

16 cl, 9 dwg