Low-voltage topology identification system based on high-frequency characteristic signal

The invention relates to the technical field of electric power, and discloses a low-voltage topology identification system based on a high-frequency characteristic signal. A gateway terminal; a characteristic signal generator; wherein the measurement and control terminal is configured at each low-voltage electricity meter node, the gateway terminal is connected with the low-voltage electricity meter nodes through transmission lines, and the characteristic signal generator is connected with the gateway terminal through a control line; the gateway terminal controls the characteristic signal generator to generate high-frequency characteristic current and injects the high-frequency characteristic current into the transmission line; the measurement and control terminal senses the high-frequency characteristic current received on the transmission line and generates a high-frequency characteristic signal; and the gateway terminal generates a topological relation network of the low-voltage ammeter nodes according to