Wind Turbine Grounding Resistance Numerical Calculation

2014 ◽  
Vol 1065-1069 ◽  
pp. 3414-3421
Author(s):  
Cong Li ◽  
Ke Jie Huang ◽  
Xiao Qing Zhang ◽  
Nai Wen Hu
Keyword(s):  
Wind Turbine ◽  
Integral Formula ◽  
Potential Method ◽  
Personal Safety ◽  
Grounding Resistance ◽  
Matlab Program ◽  
Test Platform ◽  
Average Potential ◽  
The Empirical Analysis ◽  
Grounding Resistance Measurement

With the increase capacity of wind turbines, grounding device's influence on the equipment and personal safety is becoming more and more significant. In order to calculate the grounding resistance of a wind turbine more accurately, in this paper, based on the Neumann integral formula and the average potential method is applied to derive a formula which can calculate the value of grounding resistance. A general MATLAB program corresponding to the calculation formula is compiled. By comparing the numerical value with the empirical analysis results and building a grounding resistance measurement test platform the correctness of the formulas and program is verified.

Soil Resistivity Evaluation and Grounding System Resistance

2018 ◽  
pp. 1-37
Keyword(s):  
Resistivity Measurement ◽  
Potential Method ◽  
Measurement Procedure ◽  
Resistance Testing ◽  
Soil Resistivity ◽  
Factors Affecting ◽  
Grounding Resistance ◽  
Ground Resistance ◽  
Transmission Towers ◽  
Electrode Method

This chapter contains the factors affecting the soil resistivity and grounding resistance such as the soil moisture content, soil mineral content and soil temperature. It discusses the methods of measuring of soil resistivity and grounding resistance using Wenner method. Method to obtain the required samples for obtaining accurate site resistivity is presented. Soil resistivity measurement procedure is given in this chapter. The chapter contains three electrode method or fall-of-Potential method, dead earth method, and ground resistance testing existing systems using ‘Selective' Clamp-on-Measuring of high voltage transmission towers feet resistance. Methods of calculating the apparent soil resistivity of Multi-Layers, apparent soil resistivity of two layers and apparent soil resistivity of three layers are presented in this chapter.

An Improved FFT Algorithm and its Application in the Measurement of Grounding Resistance

2012 ◽  
Vol 546-547 ◽  
pp. 260-265
Author(s):  
Wen Yan Chen ◽  
Hang Tuo
Keyword(s):  
Measurement Accuracy ◽  
Measurement Precision ◽  
Resistance Measurement ◽  
Harmonic Amplitude ◽  
Frequency Method ◽  
Grounding Resistance ◽  
Amplitude Correction ◽  
Interference Signals ◽  
Simulation Results ◽  
Grounding Resistance Measurement

For the problems of noise and clutter interference in the measurement of grounding resistance, the article designs a grounding resistance measurement method based on an improved FFT algorithm. We deduce the harmonic amplitude correction formula which can more accurately measure the frequency of the interference signals and the amplitude of the effective signals, and thus improve the measurement accuracy of grounding resistance. This paper also devises a grounding resistance measurement scheme combining the algorithm and the variation-frequency method. The simulation results and the validation of experimental data show that, the algorithm evidently reduces the noise and improves the measurement precision. The algorithm is of high practical value to the grounding resistance measurement.

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