CN110346632B

CN110346632B - Angle difference two-dimensional map expression method for representing wide-area dielectric loss

Info

Publication number: CN110346632B
Application number: CN201910607565.9A
Authority: CN
Inventors: 叶新林; 张武波; 洪亮亮; 王俊肖
Original assignee: HANGZHOU XIHU ELECTRONIC INSTITUTE
Current assignee: HANGZHOU XIHU ELECTRONIC INSTITUTE
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2021-08-24
Anticipated expiration: 2039-07-05
Also published as: CN110346632A

Abstract

The invention discloses an angular difference two-dimensional map expression method for representing wide-area dielectric loss. The invention is realized as follows: and installing sensors on all monitoring points, and synchronously acquiring and recording current data of each monitoring point at each moment in a wide area. The method comprises the steps of calculating phase information of each monitoring point at each moment on the basis of current data collected by a sensor, designating one monitoring point as a reference point, obtaining an angular difference conducted between different monitoring points based on the same waveform at the same moment, displaying real-time monitoring data of the angular difference in a two-dimensional graphical interface mode, and judging the change of the insulation state of the high-voltage equipment by monitoring the fluctuation change of the angular difference. The invention innovatively uses the map mode to express the angular difference on the basis of the current data acquired by the sensor, and can synchronously display the real-time monitoring data of the angular difference in a wide area on a two-dimensional graphical interface.

Description

Angle difference two-dimensional map expression method for representing wide-area dielectric loss

Technical Field

The invention belongs to the field of atlas analysis visualization, and particularly relates to an angular difference two-dimensional atlas expression method for representing wide-area dielectric loss.

Background

Dielectric loss detection is one of the main methods for reflecting the insulation state of a medium, and is convenient for quantitative analysis of the loss characteristics of an insulation material, and generally, the dielectric loss is calculated by measuring the tangent value of a phase difference (hereinafter, referred to as an "angular difference"), and the insulation state of the medium is reflected by the fluctuation state of the dielectric loss.

The development of the current information technology is increasingly wide, and the role and the status of the visualization technology in enterprise safety production are more and more important. However, in the field of visualization, there is no related map expression method for the expression mode of the angular difference, and the angular difference and the change of the dielectric insulation state cannot be intuitively and clearly monitored.

Disclosure of Invention

The invention aims to provide an angular difference two-dimensional map expression method for representing wide-area dielectric loss aiming at the defects of the prior art, and the specific thought is as follows:

and installing sensors on all monitoring points, and synchronously acquiring and recording current data of each monitoring point at each moment in a wide area. The method comprises the steps of calculating phase information of each monitoring point at each moment on the basis of current data collected by a sensor, designating one monitoring point as a reference point, obtaining an angular difference conducted between different monitoring points based on the same waveform at the same moment, displaying real-time monitoring data of the angular difference in a two-dimensional graphical interface mode, and judging the change of the insulation state of the high-voltage equipment by monitoring the fluctuation change of the angular difference.

The specific method comprises the following steps:

and (1) installing sensors at different monitoring points, and synchronously acquiring and recording current data of each monitoring point at each moment in a wide area. One of the monitoring points is designated as a reference point, phase information is acquired on the basis of current data acquired by the sensor, the angular difference delta phi between the other monitoring points and the reference point at the same moment is calculated, and angular difference changes caused by the characteristics of a power grid circuit, environmental characteristics and the characteristics of the sensor and an acquisition circuit are eliminated by a background computer program.

And (2) defining a two-dimensional coordinate axis of the map, and selecting a coordinate X axis as an angle difference axis delta phi, which is the angle difference of each monitoring point and the reference point at the same moment. The center position of the angular difference axis is marked as "0", which represents that the angular difference between the position and the reference point is 0, and the position of the point is the position of the reference point.

And selecting a coordinate Y axis as a test point axis D to represent the position of each monitoring point. The height of the monitoring point indicates the number of occurrences of the angular difference value, and a higher height indicates a greater number of occurrences of the value.

And (3) mapping the corresponding test points and the detection data of the angular difference to two-dimensional coordinates, thereby drawing an angular difference two-dimensional map.

Analyzing the angular difference two-dimensional map, wherein inherent angular differences exist between the monitoring points and the reference points due to the distance, so that the angular differences between the monitoring points and the reference points are normally distributed by taking the inherent angular differences as centers, namely, the occurrence of peaks indicates normal; if the angular difference shifts and continuously increases, a hump or continuous hump appears, which indicates that the insulation state of the equipment at the monitoring point changes.

The invention has the advantages that:

the invention innovatively applies the map mode to express the angular difference on the basis of the current data acquired by the sensor, and can synchronously carry out two-dimensional graphical interface display and data analysis on the real-time monitoring data (including corresponding test points and angular differences) of the angular difference in a wide area. Meanwhile, the interface expression mode is clear at a glance, and the change of the insulation state of the high-voltage equipment can be effectively judged by monitoring the fluctuation change of the angular difference.

Drawings

FIG. 1 is an illustration of an example of a map display according to the present invention.

Detailed description of the invention

The present invention will be described in detail below with reference to the accompanying drawings, and it should be noted that the described embodiments are only for the understanding of the present invention, and do not limit the present invention in any way.

In practical application, for example, sensors are installed at the same-voltage side local station three-phase and direct-connection station same-phase different monitoring points, wide-area synchronous current signal reading is achieved, the angular difference between each monitoring point and the reference point at the same moment is calculated, real-time monitoring data of the angular difference is recorded and displayed through a two-dimensional graphical interface, and the dielectric insulation state is monitored by monitoring the change of the angular difference.

The method comprises the following specific steps:

step (1) mounting sensors on the same-voltage side and same-phase different monitoring points of the local station and the direct-connection station, as shown in fig. 1, respectively marking the monitoring points as A0-A10, designating the monitoring point A0 as a reference point, acquiring phase information based on current data acquired by the sensors, calculating the angular difference delta phi between the rest monitoring points A1-A10 and the reference point A0 at the same moment, and eliminating angular difference changes caused by power grid circuit characteristics, environmental characteristics, sensors and acquisition circuit characteristics by a background computer program.

And (2) defining a coordinate X axis as an angular difference axis delta phi, which is the angular difference of each monitoring point and the reference point at the same moment. The center position of the angular difference axis is marked as "0", which represents that the angular difference between the position and the reference point is 0, and the position of the point is the position of the reference point.

Analyzing the angular difference two-dimensional map, wherein the angular differences between the monitoring points and the reference points are inherent due to the distance, so that the angular differences between the monitoring points and the reference points are normally distributed by taking the inherent angular differences as the center, namely, the occurrence of peaks indicates that the equipment is normal, and the insulation state of the equipment is in a normal state; if the angular difference shifts and continuously increases, a hump or continuous hump appears, which indicates that the insulation state of the equipment at the monitoring point changes.

As shown in FIG. 1, the statistical graphs of the angular differences between the monitor points A1-A10 and the reference point, for example, the waveforms corresponding to the monitor point A5, are normally distributed with the angular difference of-3 ° as the center. The waveform of monitoring point a9 shows a hump, i.e. its inherent angular difference shifts and continues to increase, indicating a change in the insulation state of the device at monitoring point a 9.

Claims

1. An angular difference two-dimensional map expression method for representing wide-area dielectric loss is characterized in that:

installing sensors on all monitoring points, and synchronously acquiring and recording current data of each monitoring point at each moment in a wide area; calculating phase information of each monitoring point at each moment on the basis of current data acquired by a sensor, designating one monitoring point as a reference point, obtaining an angular difference conducted between different monitoring points based on the same waveform at the same moment, displaying real-time monitoring data of the angular difference in a two-dimensional graphical interface mode, and judging the change of the insulation state of the high-voltage equipment by monitoring the fluctuation change of the angular difference;

the method comprises the following steps:

installing sensors at different monitoring points, and synchronously acquiring and recording current data of each monitoring point at each moment in a wide area; appointing one of the monitoring points as a reference point, acquiring phase information based on current data acquired by a sensor, calculating the angular difference delta phi between the other monitoring points and the reference point at the same moment, and eliminating angular difference changes caused by the characteristics of a power grid circuit, environmental characteristics and the characteristics of the sensor and an acquisition circuit by a background computer program;

step (2) defining a two-dimensional coordinate axis of the map, selecting a coordinate X axis as an angle difference axis delta phi, and taking the coordinate X axis as the angle difference of each monitoring point and a reference point at the same moment; the central position of the angular difference shaft is marked as '0', the angular difference between the position and the reference point is represented as 0, and the position of the point is the position of the reference point;

selecting a coordinate Y axis as a test point axis D to represent the position of each monitoring point; the height of the monitoring point represents the frequency of the angular difference value, and the higher the height is, the more the frequency of the value is;

mapping the corresponding test points and the detection data of the angle difference to two-dimensional coordinates, thereby drawing an angle difference two-dimensional map;