Solution to the inverse problem regarding the location of substation’s grounding grid by using the derivative method

2018 ◽  
Vol 56 (4) ◽  
pp. 549-558 ◽  
Author(s):  
Aamir Qamar ◽  
Fan Yang ◽  
Naidong Xu ◽  
Syed Ahmar Shah
Keyword(s):  
Inverse Problem ◽  
Grounding Grid ◽  
Derivative Method

scholarly journals BREAKPOINT DIAGNOSIS OF SUBSTATION GROUNDING GRID USING DERIVATIVE METHOD

2017 ◽  
Vol 57 ◽  
pp. 73-80 ◽  
Author(s):  
Aamir Qamar ◽  
Nadir Shah ◽  
Zeeshan Kaleem ◽  
Zahoor Uddin ◽  
Farooq Alam Orakzai
Keyword(s):  
Grounding Grid ◽  
Derivative Method

scholarly journals TOPOLOGY MEASUREMENT OF SUBSTATION'S GROUNDING GRID BY USING ELECTROMAGNETIC AND DERIVATIVE METHOD

2016 ◽  
Vol 67 ◽  
pp. 71-90 ◽  
Author(s):  
Aamir Qamar ◽  
Fan Yang ◽  
Wei He ◽  
Ammad Jadoon ◽  
Muhammad Zeeshan Khan ◽  
...  
Keyword(s):  
Grounding Grid ◽  
Derivative Method

Magnetic field inverse problem of grounding grid and its application

2012 ◽  
Vol 40 (3) ◽  
pp. 173-183 ◽  
Author(s):  
Fan Yang ◽  
Yan Jiang ◽  
Qinyan Shi ◽  
Tao Chen ◽  
Wei He
Keyword(s):  
Magnetic Field ◽  
Inverse Problem ◽  
Grounding Grid

scholarly journals Derivative Method Based Orientation Detection of Substation Grounding Grid

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1873 ◽  
Author(s):  
Aamir Qamar ◽  
Muhammad Umair ◽  
Fan Yang ◽  
Muhammad Uzair ◽  
Zeeshan Kaleem
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Critical Parameters ◽  
Magnetic Flux Density ◽  
Main Peak ◽  
Diagonal Branch ◽  
Grounding Grid ◽  
Derivative Method ◽  
Grounding Grids ◽  
Orientation Detection

The grounding grid is a key part of substation protection, which provides safety to personnel and equipment under normal as well as fault conditions. Currently, the topology of a grounding grid is determined by assuming that its orientation is parallel to the plane of earth. However, in practical scenarios, the assumed orientation may not coincide with the actual orientation of the grounding grid. Hence, currently employed methods for topology detection fails to produce the desired results. Therefore, accurate detection of grounding grid orientation is mandatory for measuring its topology accurately. In this paper, we propose a derivative method for orientation detection of grounding grid in high voltage substations. The proposed method is applicable to both equally and unequally spaced grounding grids. Furthermore, our method can also determine the orientation of grounding grid in the challenging case when a diagonal branch is present in the mesh. The proposed method is based on the fact that the distribution of magnetic flux density is perpendicular to the surface of the earth when a current is injected into the grid through a vertical conductor. Taking the third order derivative of the magnetic flux density, the main peak coinciding with the position of underground conductor is accurately obtained. Thus, the main peak describes the orientation of buried conductor of grounding grid. Simulations are performed using Comsol Multiphysics 5.0 to demonstrate the accuracy of the proposed method. Our results demonstrate that the proposed method calculate the orientation of grounding grid with high accuracy. We also investigate the effect of varying critical parameters of our method.

scholarly journals Topological derivative method for an inverse problem modeled by the Schr¨odinger equation

2018 ◽  
Author(s):  
Lucas Dos Santos Fernandez ◽  
Antonio André Novotny ◽  
Ravi Prakash
Keyword(s):  
Inverse Problem ◽  
Topological Derivative ◽  
Derivative Method

AN INVERSE PROBLEM IN THE DYNAMICAL REATOR THEORY

1982 ◽  
Vol 2 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Dexing Feng ◽  
Guangtian Zhu
Keyword(s):  
Inverse Problem
Sign in / Sign up

Export Citation Format

Share Document