Characteristic current information bit identification method

The invention relates to the technical field of low-voltage power distribution network automation, and discloses a characteristic current information bit identification method, which comprises the following steps of: presetting a to-be-transmitted characteristic synchronization signal and a to-be-transmitted information sequence; a transmitting end collects power frequency voltage, and switches according to a to-be-transmitted characteristic synchronization signal and a to-be-transmitted information sequence; a receiving end collects power frequency voltage and current, and subtracts the adjacent power frequency periods of the power frequency current and stores the difference; carrying out correlation calculation on the power frequency current and the to-be-sent characteristic synchronization signal; determining whether to record a sending starting time point and jump to a next step or a previous step; when the decoded address is consistent with the power frequency current sending preset starting time point a