Electronic voltage transformer of electricity distribution network and phase voltage measurement method thereof

Abstract

The invention relates to an electronic voltage transformer of an electricity distribution network and a phase voltage measurement method thereof. A data optical interface, an optical fiber transmission module, a processing circuit, an electric field pickup plate electrode and a piezometer ring of the electric field pickup plate are arranged internally in the shell body of the electronic voltage transformer of an electricity distribution network. The phase voltage measurement method comprises the steps: a high-pressure contact arm is connected with a point to be tested, and then the electric field pickup plate detects a voltage signal according to the electric field intensity near the high-pressure contact arm and sends the signal to the processing circuit; then the voltage is sent to a micro controller after the processing circuit filters and reshapes the voltage in order to carry out A / D sampling and calculation, and thus, the voltage of the test point is obtained; then the voltage value is sent to the optical fiber transmission module, and the data is transmitted to a data collector in the form of light.

Description

technical field [0001] The invention relates to a power system automation product and a method for measuring phase voltage thereof, in particular to an electronic voltage transformer of a distribution network and a method for measuring phase voltage thereof. Background technique [0002] At present, most distribution networks in my country use systems with indirect neutral points. Generally, this type of system can only install an electromagnetic voltage transformer in the substation to detect the phase voltage, and it is not allowed to add a similar electromagnetic voltage transformer to the line. Type voltage transformers are used to provide phase voltage to line equipment, because the system cannot have a second grounding point, and adding outdoor voltage transformers to the system is likely to cause system resonance, resulting in resonance overvoltage, which brings great harm to the system. The present invention is exactly the solution proposed at this problem. Contents...

AI Technical Summary

Problems solved by technology

[0002] At present, most distribution networks in my country use systems with indirect neutral points. Generally, this type of system can only install an electromagnetic voltage transformer in the substation to detect the phase voltage, and it is not allowed to add a similar electromagnetic voltage transformer to the line. Type voltage transformers are used to provide phase voltage to line equipment, because the system cannot have a second grounding point, and adding outdoor voltage transformers to the system is likely to cause system resonance, resulting in resonance overvoltage, which brings great harm to the system

Images