Method for balancing loads on a polyphase electrical network, balancing device and corresponding computer program

A method for balancing loads in an electrical network comprising a plurality of phases, each phase supplying electrical energy to at least one connection point adapted to connect an electrical installation of a subscriber to said electrical network, wherein said method is implemented in a balancing device connected to said plurality of phases, said balancing device comprising a plurality of electromechanical relays, each electromechanical relay being adapted to connect a phase in said plurality of phases to an output phase (S) of said connection point, said output phase being intended to supply electrical energy to the electrical installation of the subscriber, and wherein said method comprises:

• after reception, via a communication module, a request to change phase connection, commanding a step of phase connection change to switch from a connection, via a first electromechanical relay, to a first phase to which said output phase is initially connected, to a connection, via a second electromechanical relay, of said output phase to a second phase of said electrical network;
• said phase connection change step comprises:
• commanding opening of all the electromechanical relays of said balancing device,
• obtaining a first measurement of a voltage downstream of the electromechanical relays, and then, after a predetermined period (T), obtaining a second measurement of a voltage downstream of the electromechanical relays,
• obtaining a third measurement of a voltage downstream of the electromechanical relays at the end of the predetermined period, when said first measurement is different from 0 and said second measurement is equal to 0,
• commanding closure of said second electromechanical relay if:
• (i) said first measurement is equal to 0 and said second measurement is equal to 0, or
• (ii) said first measurement is different from 0, said second measurement is equal to 0, and said third measurement is equal to 0;
• commanding closure of said first electromechanical relay if:
• (i) said first measurement is different from 0 and said second measurement is different from 0, or
• (ii) said first measurement is different from 0, said second measurement is different from 0, and said third measurement is different from 0.