Abstract:Increasing the rate of qualified voltage is an important task of power supply enterprise. To manage the index, power supply voltage monitoring and controlling system which can reflect the whole power grid voltage must be established. So, the idea of power supply voltage monitoring and analyzing based on the big data of distribution and utilization is proposed in this paper. The voltages of 10 kV substation bus, 10 kV feeder, distribution transformer and the users of voltage levels can be acquired based on on-line monitoring terminals with voltage monitoring function, which makes timely finding abnormal voltage become possible. Integrating and using the data in existing information systems, and analyzing the causes of abnormal voltage, can locate bottlenecks quickly. The feasibility and effectiveness of power supply voltage monitoring and analyzing based on the big data of distribution and utilization is verified by the actual cases of the power supply enterprises.