Unlock instant, AI-driven research and patent intelligence for your innovation.

A Correction Method of Arc Model Based on Pearson Coefficient

A coefficient and arc technology, applied in the field of simulation and calculation of the arc grounding process of distribution network, can solve the problem that the simulation results cannot accurately reflect the actual situation, and achieve the effect of strong adaptability

Active Publication Date: 2021-10-08
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This application provides an arc model correction method based on the Pearson coefficient to solve the problem that the simulation results of the existing model cannot accurately reflect the actual situation for the arc ground fault

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Correction Method of Arc Model Based on Pearson Coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] see figure 1 , the application provides a Pearson coefficient-based arc model correction method, the method comprising:

[0013] Step 11: Using the arc model and the current three-phase voltage value of the ground resistance and the fault ground current value, calculate the parameters to be corrected, and the parameters to be corrected include the first time constant, the second time constant and the voltage constant.

[0014] Specifically, using the following formula, parameters to be corrected, the parameters to be corrected include a first time constant, a second time constant and a voltage constant;

[0015] (1)

[0016] (2)

[0017] (3)

[0018] Among them, g is the arc conductance measured in the experiment, t is the time variable, τ is the third time constant, G is the static conductance, A is the first time constant, B is the second time constant, I0 is the fault ground current value, Varc is the voltage constant.

[0019] The specific calculation ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present application discloses a method for correcting an arc model based on the Pearson coefficient. The method includes: using the arc model to calculate the parameters to be corrected; Target parameters; according to multiple sets of target parameters and the current grounding resistance, use the Pearson coefficient formula to calculate the Pearson coefficient corresponding to each set of target parameters; according to the Pearson coefficient corresponding to each set of target parameters, the Pearson coefficient closest to 1 will be calculated. The target parameters corresponding to the inferior coefficients are determined as the optimal parameters. This method can optimize the design of model parameters in each case of grounding resistance; use the measured data to design model parameters, and the model parameters change with the change of grounding resistance, which has strong versatility and adaptability, and can be better applied to Complex and varied actual lines.

Description

technical field [0001] The present application relates to the field of simulation and calculation of arc light grounding process of distribution network, and in particular to an arc model correction method based on Pearson coefficient. Background technique [0002] The distribution network is widely distributed and the structure is complex. The grounding method of the domestic distribution network is mainly based on the non-effective neutral point grounding, mainly the neutral point is not grounded, and the neutral point is grounded through the arc suppression coil. The non-effective neutral point grounding system is also called the small current grounding system, and the most common fault in the small current grounding system is the single-phase grounding fault. In single-phase grounding accidents, most of them belong to arcing grounding. On the one hand, arc combustion may cause fire, and on the other hand, it may cause large transient overvoltage, which endangers the saf...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G06F30/20
CPCG01R31/086G01R31/088G06F30/367
Inventor 何乐为刘红文杨庆王科聂鼎杨金东
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST