Power grid voltage measurement anomaly identification method based on distance correlation coefficient

A technology of correlation coefficient and grid voltage, applied to electrical components, circuit devices, complex mathematical operations, etc., can solve the problems of increasing equipment, grid influence, passive mode, and low recognition accuracy, so as to prevent the loss of electricity bill measurement and improve safety The effect of stabilizing economic operation

Active Publication Date: 2020-09-04
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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AI Technical Summary

Benefits of technology

This patented technology helps detect small changes that may occur during an AC transmission line's performance over time without losing its ability for energy supply. It does this through monitoring both current (I) and voltage levels at different points along it's pathway. By analyzing these measurements with other sources like sensors attached to the cable, we are able to identify any issues early enough before they affect their effectiveness. These technical improvements improve safety and stability while also enhancing efficiency when replacing faulty components such as fuses used in electrical devices.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the reliability of measuring and controlling voltage measurements from distributed sources like generators (G) located far away from their original location due to factors like environmental conditions during installation/maintenance procedures. Specifically, there can exist issues related to maintaining accurate voltage values collected and analyzated over long distances between different locations.

Method used

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  • Power grid voltage measurement anomaly identification method based on distance correlation coefficient
  • Power grid voltage measurement anomaly identification method based on distance correlation coefficient
  • Power grid voltage measurement anomaly identification method based on distance correlation coefficient

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Embodiment

[0054] Such as figure 1 As shown in the present invention, a grid voltage measurement abnormality identification method based on the distance correlation coefficient comprises the following steps:

[0055] S1: Form historical voltage data file F1 from the historical voltage data collected by the grid voltage data acquisition system; historical voltage data file F1 includes the same substation, different intervals, the same voltage level, and the same phase (A phase or B phase or C phase) Voltage data Among them, t1 represents the time scale, and the value range is T1 is the time length of the F1 file; sam is the sampling interval of the grid voltage data acquisition system; i is the different intervals of the same voltage level of the substation, the value range is 1≤i≤B, and B is the total number of intervals of the same voltage level of the substation;

[0056] S2: According to step S1, calculate the voltage data in the historical voltage data file F1 by using the Min dista

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Abstract

The invention discloses a power grid voltage measurement abnormity identification method based on a distance correlation coefficient, and the method comprises the steps of automatically calculating adistance correlation coefficient matrix among a plurality of intervals through a given multi-dimensional voltage historical data file F1 at the same voltage level, and learning to find out a thresholdvalue for identifying the abnormity of voltage measurement data; calculating a distance correlation coefficient matrix among a plurality of intervals by utilizing the to-be-identified voltage data file F2; and judging a voltage measurement data state in the new multi-dimensional voltage data file by combining a threshold value which is automatically learned by utilizing historical voltage data and is used for identifying the abnormity of the voltage measurement data, thereby realizing the voltage measurement and transmission state identification of a transformer substation voltage transformer, a secondary transmission and transformation loop and a measurement and control device. According to the invention, the slight measurement abnormality of the voltage transformer can be discovered inadvance by applying the existing power grid voltage data without power failure, maintenance and hardware installation, and the identification precision is high.

Description

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Claims

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Application Information

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Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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