A switch integrated medium voltage electronic voltage transformer

Abstract

The invention discloses a switch integrated medium-voltage electronic voltage transformer comprising a breaker switch body and an external capacitor; the features are that a wire inlet / outlet metal pole plate is in a cylinder structure with two opening ends, and coaxially sleeved on the breaker wire inlet / outlet periphery; an insulation gap is formed between the wire inlet / outlet metal pole plateand the breaker inlet wire, thus forming a wire inlet / outlet capacitor; the wire inlet / outlet capacitor is connected in series with the external capacitor via a wire, and grounded, thus enabling the wire inlet / outlet capacitor and the external capacitor to cascade and form a breaker wire inlet / outlet voltage divider, and enabling the breaker wire inlet / outlet voltage divider and the breaker switchbody to form an integrated structure. An existing electromagnetic sensor is complex in structure and low in precision; the method can solve said problems, and uses a capacitance dividing potential drop principle to design the compact electronic voltage transformer with a simple structure, thus accurately and effectively measuring the voltage on two ends of the breaker.

Description

technical field [0001] The invention belongs to the technical field of high-voltage measurement, and in particular relates to an integrated medium-voltage electronic voltage transformer. Background technique [0002] In the power system, the measurement part of the medium-voltage circuit breaker mainly includes voltage measurement and current measurement. Accurately obtaining circuit breaker voltage and current is of great significance for relay protection and circuit breaker operation monitoring. Among them, the input and output line voltage of the intelligent circuit breaker is an important operating parameter. In the distribution network, a smart power distribution network can be composed of multiple smart circuit breakers. Each intelligent circuit breaker can quickly judge the type of fault and the location of the fault according to the primary voltage and current data in the power distribution network, realize accurate positioning and isolation of the fault, and improv...

AI Technical Summary

Problems solved by technology

According to the method of the technical solution of the present invention, aiming at the complex structure and low precision of the current electromagnetic voltage transformer, a simple and compact electronic voltage transformer is designed based on the principle of capacitive voltage division, which can accurately and effectively measure the two terminal voltage

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