Voltage Measuring Sensor Based on Capacitive Voltage Divider

The use of new innovative devices in modern conditions makes it possible to obtain information about the state of the power line in real time, which in turn increases the reliability of power transmission. This article describes an autonomous voltage sensor with wireless information transmission and tests carried out in the laboratory and on the operating 10 kV line. The voltage sensor is made in the form of a capacitive voltage divider, the first lining of which is a current conductor, the second is an insulated metal rod parallel to the current conductor, suspended from the first lining at a distance of the thickness of the rod insulation. The power supply unit of the sensor consists of two current transformers and reserve capacitors, which ensures stable operation of the device over a long period. The measured data on the potential difference between the conductor and the rod is sent via a wireless radio channel. The assembly is flashed with firmware that implements all the basic operations in the network of the IEEE 802.15.4 standard. It allows you to form new networks, join an existing network, organize data relaying and automatic network recovery.