Research and Application of Judgement Technology of Typical Medium and Low-Voltage Faults Based on Big Data Technology

In order to find the disconnection of medium and low-voltage lines timely and effectively, based on the big data of power supply established by the special work of marketing, distribution and regulation data sharing and integration, this paper constructs a research and adjustment model for typical medium and low-voltage faults from the perspective of electrical value (voltage, current, unbalance rate) in the low-voltage side of the distribution transformer. It analyzes the logical relationship of corresponding electrical characteristic values after faults such as line disconnection, single-phase loss and single-phase grounding of the distribution transformer when the 10 kV distribution transformer operates under different load factors, winding connection group, three-phase unbalance rate and system voltage, and applies fault warning model in the daily operation and maintenance of the distribution network, to improve the quality of active repair service, shorten the fault finding and users’ power outage time, and improve the reliability of power supply.