10.14489/td.2021.12.pp.012-019

2021, 12 December

DOI: 10.14489/td.2021.12.pp.012-019

Shichev P. S.
TO DEVELOPMENT OF A MEASURING SYSTEM AND METHODOLOGICAL SUPPORT FOR CONTROL OF TECHNICAL CONDITION OF CENTRIFUGAL PUMP UNITS
(pp. 12-19)

Abstract. The article discusses solutions to create an algorithm for specifying the value of diagnostic parameters and instrumentation of measuring systems for the method of diagnostics of electric driven cantilever centrifugal pumping units by analyzing the spectra of motor current and voltage. The simulation model of the unit was used to establish a quantitative relationship between the amplitudes of the frequency components of the current and voltage of the motor supply line and the dependence of the phase shift between the fundamental harmonics of the current and voltage signals when varying the pressure developed by the pump centrifugal pumping units. An algorithm has been formed that assumes two approaches to refining the amplitude of the informative frequency component of the current spectrum, taken depending on the set of measured parameters. Arrangements of measuring systems for diagnostics of the centrifugal pumping units are proposed both with minimal possibilities for assessing the state of nodes by the spectrum of the current of one of the phases of the power line of the electric motor, and with the extended functionality of the spectral analysis of signals of currents and voltages of three phases of the motor and the possibility of refining the diagnostic parameters in conditions of their distortion by the frequency components of the mains voltage.

Keywords: technical condition control, current spectrum, non-sinusoidal voltage, measuring system, spectrum analyzer.

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P. S. Shichev (Saint-Petersburg State University of Aerospace Instrumentation, Saint-Petersburg, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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DOI: 10.14489/td.2021.12.pp.012-019

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