Data processing method for error correction of logarithmic arc model simulation data

Abstract

A data processing method for error correction of logarithmic arc model simulation data is disclosed. A logarithmic arc model simulation data sequence P (V, I) with one cycle is obtained. The arc voltage Vmax and- Vmax is the data demarcation point, and P (V, I) is divided into two 1 / 2 periodic data sequences. By choosing appropriate correction parameters, the correction equation is established asfollows: L: Varc=f (Iarc) to V'arc=f (I'arc), and a new data sequence P '(V', I ') is obtained. The corrected data P '(V', I ') have the same characteristics as the real recorded data V-I curve is more close to the external characteristics, which provides data support for the subsequent research of arc grounding fault; the invention aims at solving the problem that the simulation waveform of the logarithmic arc model uarc=sgn (iarc) UTln (| iarc | / IS+1) can not characterize the measured arc V. The simulation waveform of the logarithmic arc model uarc=sgn (iarc) UTln (| iarc | / IS+1) can not represent the measured arc V. I phase angle difference problem, the corrected data has more close to the actual arc external characteristics, improve the accuracy of the logarithmic arc model simulation data.

Description

technical field [0001] The invention relates to the technical field of power system protection and control, in particular to a data processing method for error correction of logarithmic arc model simulation data. technical background [0002] High-voltage transmission lines have the characteristics of long channels and wide coverage, and are susceptible to single-phase arc high-resistance grounding faults due to wildfires, lightning strikes, and insulator flashovers. The fault characteristic quantity of this kind of fault is often lower than the protection setting value, resulting in the delay or even refusal of the protection device action, and there are few field fault data records. [0003] In order to obtain the experimental data of arc high-resistance grounding faults, the American Electric Power Research Institute, the Canadian Hydropower Research Center in Quebec, Wuhan University, and Chongqing University have all established experimental platforms for line breakdown...

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Problems solved by technology

[0006] In order to correct the problem that the arc V-I waveform obtained by the simulation of the arc logarithmic model cannot represent the actual arc V-I phase angle difference, the object of the present invention proposes a data processing method for error correction of the logarithmic arc model simulation data. A deformation function with interval peak value and concave-convex variability is proposed, and a deformation matrix that can be used for data expansion is constructed. The deformation matrix is ​​used to analyze the arc logarithmic model simulation data P (V,I) Perform correction processing to obtain a new arc burning data sequence P' (V',I') , the corrected data has the external characteristics closer to the actual arc, which improves the accuracy of the simulation data of the logarithmic arc model

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