POWER SUPPLY SYSTEM COMPRISING AN ISOLATED COMMUNICATIONS APPARATUS

This application provides an isolated communications apparatus and a power supply system, applied to a transformer. The transformer includes N first rectifier units and a second rectifier unit, and the isolated communications apparatus includes N first control units, a second control unit, and a signal convergence unit. The first control units are connected to the first rectifier units in a one-to-one correspondence manner. Each first control unit is connected to the signal convergence unit, and the signal convergence unit and the second control unit are connected through an optical fiber. The signal convergence unit is configured to: receive first data packets from the N first control units, and send the first data packets of the N first control units to the second control unit; and receive at least one second data packet from the second control unit, determine a first control unit corresponding to each second data packet, and send each second data packet to the first control unit corresponding to each second data packet. According to the solutions, a quantity of used optical fibers can be greatly reduced, to reduce optical fiber deployment costs.