Novel technique to calculate the effect of electromagnetic field of HVTL on the metallic pipelines by using EMTP program

Abstract

Novel technique to calculate the effect of electromagnetic field of HVTL on the metallic pipelines by using EMTP program Ghada M. Amer Article information:To cite this document: Ghada M. Amer, (2007),"Novel technique to calculate the effect of electromagnetic field of HVTL on the metallic pipelines by using EMTP program", COMPEL -The international journal for computation and mathematics in electrical and electronic engineering, Vol. 26 Iss 1 pp. 75 -85 Permanent link to this document: http://dx.If you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -The paper proposes to present the effect of the high voltage transmission lines on the metallic pipelines by calculating the induced voltage due to mutual inductance between the two circuits especially in short circuit conditions of high voltage overhead transmission lines. Design/methodology/approach -The electro magnetic transient program (EMTP) is used to simulate the high voltage transmission lines in normal case and in different faulty case conditions. A software is built on MATLAB program (M-file) to study the effects of various parameters on the magnitude of the induced voltage such as: separation distance between the high voltage transmission line and the metallic pipeline (horizontal distance), different cases of short circuits and normal operation case, the screening factor, and the soil resistivity. Findings -The three-phase to ground fault gives the least induced voltage, and phase to ground fault case is the most serious case. The induced voltage decreases with increasing the soil resistivity until 400 Vm and after this, the induced voltage in the metallic pipeline increases with increasing the soil resistivity for all phase fault types. Research limitations/implications -It does not deal with all types of interference such as capacitive interference. Practical implications -This technique helps to know the electrical influence exerted by power line on a pipeline. So it can prevent the pipeline from posing a shock hazard rather than corrosion. Originality/value -This paper presents the effect of the high voltage transmission lines on the metallic pipelines by calculating the induced voltage due to mutual inductance between the two circuits especially in short circui...

EMF Analysis for a 380kV Transmission OHL in the Vicinity of Buried Pipelines

“…The pipeline voltages for a given pipeline exposure with the power line can be calculated using matrix analysis techniques [18]. The selfpotential coefficient of a pipeline close to the earth is given by (1) where h p is the pipeline's height above ground measured from the pipe's center, and r p is the pipeline's radius, both are in m. P p = 17.975109×10 6 × log e…”

“…If a person touches the pipeline i whose voltage is V p (i) , the current that would flow through the person's body is determined by the series combination of his contact resistance to earth and the pipeline's capacitive reactance. In practice, the latter is much greater than the person's resistance and therefore the discharge current is given by (6).…”

“…Further extra protecting wires underneath the power line conductors are explored for reducing the induced voltages under direct and indirect lightning strikes to the high-voltage power conductor. In fact, the work presented in [5], [6] presented the impact of different OHL configurations nearby gas pipeline on the induced voltage using Electromagnetic Transient Program (EMTP).…”

Analysis of transient inductive interference in underground pipelines due to faults on nearby power lines

“…Isogai et al (2004) developed a modelling method to simulate ac induced voltages to a buried gas pipeline from an overhead transmission line based on electromagnetic transient program (EMTP), which attention is mainly paid to the effect of varying configuration of an overhead line on the induced voltages. More lately, the inductive interference generated by 132 kV overhead transmission line on metallic pipelines has been analyzed under faulty conditions based on EMTP (Amer, 2007). Results have shown that phase to ground fault case is the most serious case.…”

Wave propagation effects induced in transmission pipelines by EMI from power lines

“…These numerical models are capable of analyzing the interacting contribution of multiple variables to the overall magnitude of AC interference. Typical standard software packages for calculation of the EMI and corresponding effects on buried pipelines were reviewed in the literature [10][11][12][13][14][15][16][17][18][19][21][22][23][24][25][26].…”