The invention discloses a zero-flashing low-
voltage distribution system and an operation method thereof. The zero-flashing low-
voltage distribution system comprises a first power supply, a second power supply, an emergency
bus, a second dual-power automatic
changeover switch or a
solid-state
changeover switch, wherein the first power supply and the second power supply are connected with two ordinary buses in a switching
station respectively; one end of the emergency
bus is connected with a mobile emergency power supply and the first power supply separately through a first dual-power automaticchangeover switch; the other end of the emergency
bus is connected with a static
energy storage uninterruptible power supply at a user side; the second dual-power automatic
changeover switch or the
solid-state changeover switch is in load connection with a user. The zero-flashing low-
voltage distribution system and the operation method thereof have the advantages that the power supply switching operation of the dual-power automatic changeover switches at a load side under the fault is avoided, thereby solving the problem of load flashing caused by
voltage sag during power supply switching, andsolving the problem of
voltage fluctuation; if the static
energy storage uninterruptible power supply breaks down or is not replenished by the power supplies before a battery runs out, the power supplies are switched to a right circuit for power supply, and sensitive load flashing caused by the
voltage sag can occur during power supply switching.