Vol. 12 є 3, 2022 p 268 - 276

Pages

Article name, authors, abstract and keyword

268-276

Study of the possibility of using magnetic field sensors for measuring direct current in steel pipelines

Sergey V. Savchenkov a, Ekaterina V. Isupova b, Ruslan V. Aginey b

a Giprogazcenter, JSC, 26 Alexeevskaya Str., Nizhny Novgorod, 603950, Russian Federation
b Ukhta State Technical University, 13 Pervomayskaya Str., Ukhta, 169300, Russian Federation

DOI: 10.28999/2541-9595-2022-12-3-268-276

Abstract: Current intensity flowing in the steel pipeline is one of the key indicators applied for analysis of these corrosion monitoring systems. Modern monitoring systems use voltage drop calculations; however, this method has some drawbacks. Contactless methods for current intensity measuring by a permanent magnetic field value are promising; however, correct assessment in this case is hampered by effects of such parameters as Earth magnetic field and pipe metal magnetization on the measured value. Measured current intensity contribution in magnetic field intensity near pipelines is small in comparison with contribution of Earth and pipe metal fields; therefore, errors (including essential ones) are inevitable when the current intensity is evaluated using magnetic field measurements. The authors set the following objective: to study a possibility of direct current sensors development, working principle of which is based on measuring permanent magnetic field intensity, offer robust options of their application and evaluate errors of such measuring systems. Main factors complicating the problem solution are considered. It is shown that the tangential magnetic field component essentially differs (more than fourfold) in pipeline sections; therefore, places for sensors installation shall be selected using magnetometric measurements. Influence of the Earth magnetic field and other sources of time-invariant homogeneous fields could be excluded when using two magnetic field intensity sensors located diametrically opposite relatively the pipeline axis. The metal magnetic field can vary in time; therefore, some methods for detection and consideration of such variations are proposed in the paper.

Keywords: current intensity, Earth magnetic field, direct current magnetic field, magnetic field, direct current, current intensity measurement, corrosion monitoring

For citation:
Savchenkov S. V., Isupova E. V., Aginey R. V. Study of the possibility of using magnetic field sensors for measuring direct current in steel pipelines. Science & Technologies: Oil and Oil Products Pipeline Transportation. 2022;12(3):268Ц276. https://doi.org/10.28999/2541-9595-2022-12-3-268-276

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