The invention discloses a power distribution network medium-
low voltage topology identification method and
system, and the method comprises the steps that a power distribution main
station transmits aline
transformer topology updating instruction to an intelligent
distribution transformer terminal, thereby enabling the intelligent
distribution transformer terminal to generate a characteristic current modulation pulse, and enabling the characteristic current modulation pulse to be coupled to a medium-
voltage line through a power
distribution transformer; the intelligent power distribution terminal detects the characteristic current modulation pulse, analyzes the characteristic current modulation pulse to judge a medium-
voltage line to which the characteristic current modulation pulse belongs, and sends topology updating information to the power distribution main
station; the power distribution main
station obtains a
voltage line transformation topological relation in the power distribution network according to the received topological updating information; each intelligent distribution
transformer terminal carries out low-voltage
topology identification on the area where the intelligent distribution
transformer terminal is located by means of
broadband carrier communication, and sends low-voltage
topology identification information to the power distribution main station; and the power distribution main station updates the real-time topological structure according to the voltage line transformation topological relation and the low-voltage topological identification information in the power distribution network. According to the power distribution network medium and
low voltage topology identification method and
system, manual configuration is not needed, the identification result is complete and accurate, and accurate
topology information support can be provided for intelligent application of the power distribution network.