Power transmission and distribution network fault locating system

A power transmission and distribution network fault locating system relates to the technical field of power system, and solves the technical problem of monitoring power transmission lines. The power transmission and distribution network fault locating system comprises a locating terminal, a plurality of grounding acquisition devices, a plurality of equipment acquisition devices, a plurality of line acquisition devices and a plurality of lightning arrester current acquisition devices, wherein the grounding acquisition devices are used for acquiring current signals of main transformer grounding lines of a power transmission and distribution network; the equipment acquisition devices are sued for acquiring voltage signals and current signals of power distribution equipment of the power transmission and distribution network; the line acquisition devices are sued for acquiring current signals of three-phase power transmission lines of the power transmission and distribution network; the lightning arrester current acquisition devices are sued for acquiring current signals of lightning arresters of the power transmission and distribution network; each lightning arrester current acquisition device is interconnected with peripheral line acquisition devices through an RF communication mode; and the locating terminal, the grounding acquisition devices and the line acquisition devices are accessed into the same Ethernet network. The system provided by the utility model is suitable for the monitoring and fault location of the power transmission and distribution network.