Phasor analyzer

Abstract

The invention relates to a detection tool in an electric power system, in particular to a phasor analyzer. The analyzer comprises a base and a dial. A central shaft is arranged on the dial. A rotatable current phasor pointer used for indicating the current phasor is installed on the central shaft. Scale lines for representing angles are marked on the disc face of the dial, wherein the 0-degree scale line and 360-degree scale line coincide with each other and are perpendicular to a horizontal line. Line voltage phasors (shown in the description) and phase voltage phasors (shown in the description) which are successively arranged in 120 degrees along the clockwise direction are marked on the disc face of the dial. The phase voltage phasor (shown in the description) points to the 0-degree scale line and the angle between the line voltage phasor (shown in the description) and the leading phase voltage phasor (shown in the description) is 30 degrees. A corresponding reverse phasor is arranged for each line voltage phasor and a corresponding reverse phasor is arranged for each phase voltage phaser. The analyzer is simple to operate and judges precisely, thereby facilitating that an operator finds out the phase voltage to which the current phasor belongs and judges the accuracy of wiring of a current secondary loop by rotating the current phasor pointer, and analysis and determination processes are simplified.

Description

technical field [0001] The invention relates to a detection tool in a power system, in particular to a phasor analyzer used for online judgment of the correctness of the connection of voltage lines and current lines in a three-phase secondary circuit. Background technique [0002] At present, phasor analysis is often carried out in electric power production, training and teaching, professional appraisal and assessment, especially in electric power marketing, electricity inspection and inspection, and transformer operation and maintenance. In the phasor analysis in the three-phase secondary circuit of the power system, it is often necessary to analyze the phase relationship between the three-phase voltage and the three-phase current, so as to conclude that the wiring of the voltage line and the current line in the three-phase secondary circuit is artificial Deliberately wrong connection or wrong connection due to staff mistakes, and then judge the specific wrong wiring form o...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that currently due to the low relevant knowledge and technical level of surveyors or the unreliable mastery of professional knowledge, it is easy to make mistakes when judging the correctness of the connection of voltage lines and current lines in the three-phase secondary circuit Whether the voltage line and the current line in the three-phase secondary circuit are wrongly connected and the specific form of the wrong line is correctly analyzed and judged. For this purpose, a method for online judgment of the voltage line and current line in the three-phase secondary circuit is provided. Phasor analyzer for correct wiring

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