Мodeling of electromagnetic effects of multicircuit power lines on pipelines

Introduction. An effective way to reduce land allocation for the construction of power engineering facilities is to implement multi-circuit power lines (MCPL). In the medium term, it can be expected that in some areas these lines will be located near main pipelines; due to the electromagnetic influence on the parts of the structure, potentials may arise that are dangerous for personnel and negatively affect the corrosion protection systems. To solve the problem of calculating the effects of MCPL on pipelines, an approach based on phase coordinates can be effectively used.

Goal. To develop digital models for determining induced potentials and currents on a pipeline laid parallel to the route of a multi-circuit power line.

Research methods. Technologies for modeling the modes of electric power systems in phase coordinates were used.

Results and discussion. A comparison of a MCPL and a corridor of lines allowed the authors to formulate the following conclusions. In the normal mode the induced voltages at individual points of the pipe in the model with a multi-circuit power transmission line exceed similar indicators for the corridor of lines by almost two times. In an open-phase mode the potential ratios on the pipe for a MCPL and a corridor of lines are within the range of 0.7…2.44, and for currents 0.7…0.82.

Conclusion. The applied approach to calculation of induced voltages is universal and can be used to determine modes in networks of various configurations. The models presented in the article can be useful in the practice of designing sections of joint passage of promising multi-circuit power transmission lines and pipelines when planning measures to ensure the safe operation of service personnel. The scientific novelty of the presented results consists in the use of an original method for determining the electromagnetic effects of multi-circuit power transmission lines on pipelines, based on the use of phase coordinates. The method applies to multi-circuit power transmission lines of other designs, for example, four- and six-circuit.

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