Analysis and Estimation of Values of Currents and Voltages at the Disturbances in Induction Machine Using Tested Matlab Simulation

Marković, Nenad; Bjelić, Slobodan; Živanić, Jeroslav; Bogićević, Zorica

doi:10.5815/ijisa.2015.01.01

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…Voltages at the machine ends are symmetrical, if the machine is connected to the voltage system in the GDS, and symmetry can be disturbed by a phase cutoff or feeding from convertors [6,12]. The form of symmetrical components from equation (11) can for some reason be modified, for example, to solve simultaneous asymmetries on GDS models or to introduce the new system components [10,13]…”

Section: The Methods Of Symmetrical Componentsmentioning

confidence: 99%

“…In Clarke coordinate system (α, β, 0) all variables are sinus and when choosing calculation steps attention is placed on the minimum time constant and adequacy of sinus value approximation. In the case of modelling a system in a coordinate system d, i, 0 which is connected to a rotational flux this problem does not exist because within this system (and any system whose rotation is synchronous to the rotational field) all variables in a stationary state appear as constant values [12,18].…”

Section: An Adopted Model Analysis and Algorithm Graphic Presentationmentioning

confidence: 99%

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The mathematical model for analysis and evaluation of the transient process of the three-phase asynchronous machine performance

Marković¹,

Živanić

Lazarevic

et al. 2018

Serb J Electr Eng

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This paper describes an adopted method which could be used in transient process modelling of three-phase asynchronous machines on the computer. Converter asynchronous electric machine feeding requires a detailed research of the transient process influence and the dynamic states of energy exchange between the electrical circuit feeding and the machine itself. A mathematical model has been formulated in order to solve the transient process of the three-phase asynchronous electric machine referring to the two asynchronous machines and containing two matrix models defined by Park's q d  components. In the system of symmetrical components the state and the operation of the first machine was defined based on relations and operation conditions of a direct sequence system and of other machines based on relations and operation conditions of an inverse sequence system. The new method has been derived from the existing psbpwm MATLAB package. The new model simulates the state and operation of a single machine with identical parameters through the state and operation of the two machines with identical parameters: the first in a direct sequence system and the others in an inverse sequence system. Operation analysis of the three-phase induction machine is limited to a transient process occurring in the right angled shape of voltage feeding. The new presented model can, with certain limitations, be applied not only to a three-phase asynchro-nous machine model but to other alternating current machines which have a stator and a rotor. The experiment has been performed following an example of asymmetrical feeding followed by inverse component phenomena of electrical and mechanical values in the machine.

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Section: The Methods Of Symmetrical Componentsmentioning

confidence: 99%

Section: An Adopted Model Analysis and Algorithm Graphic Presentationmentioning

confidence: 99%

The mathematical model for analysis and evaluation of the transient process of the three-phase asynchronous machine performance

Marković¹,

Živanić

Lazarevic

et al. 2018

Serb J Electr Eng

View full text Add to dashboard Cite

show abstract

“…In transient processes of electric machines [2], in addition to the fundamental harmonics and higher voltage harmonics, there are also:  excessive values of currents and magnetic inertia and saturation of magnetic circuits,  large electrodynamic forces caused by excessive currents and influence of interaction of these currents with the shells and armor of ferromagnetic materials,  creation of conditions for ferroresonance, mechanical vibrations in core sheets [3][4]  accelerated aging of insulation material due to cyclic changes of induction,  increase in losses in copper (due to fundamental and higher harmonics),  increased losses in the core (due to hysteresis and vortical currents).…”

Section: Introductionmentioning

confidence: 99%

The Influence of Magnetic Hysteresis in Magnetic Circuit Sheets on Transient Processes in Electrical Machines

Marković¹,

Kosovo²,

Bjelić³

et al. 2021

IJIGSP

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The character of transient processes in electrical machines and transformers defines the shape of magnetization curve of the magnetic circuit, i.e. of its sheets. Approximate analytical or numerical methods are used to determine the influence of saturation and hysteresis on transient processes. This paper presents an analytical method for the calculation of transient process in a magnetic circuit with assumed magnetization characteristic, one part of which contains saturation. An operator calculus was used to solve Maxwell's equations that characterize the transient process.The applied method has been verified by the simulation results using the adapted part of psbxfosaturable.mdl of the MATLAB Simulink software package. It is also shown that due to saturation and influence of hysteresis, additional free components appear in the sheets of the magnetic circuit (recognized in obtained values of current, induction and flux). Analysis of the shape of time diagrams of quantities also shows that the time constants of these quantities increase. In the linear part of the magnetization curve, solutions with higher accuracy are obtained, and in the part of saturation in which the accuracy of the method was not in foreground, only a qualitative analysis of the transient process has been achieved. In comparison with other methods, two regimes of transient processes when given are analyzed: magnetic excitation forces and field strengths, and magnetic fluxes and inductions.

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“…Solutions for wandering currents can be determined by the criterion of similarity to transient currents on power lines. Discharge is an electromagnetic high-frequency phenomenon whose effects are surges and surges, resulting from rapid changes in the potential gradient near the ground, and the direct impact of the discharge leader into conductors or parts of electrical equipment [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Metal Pipes in the Environment on Designing the Underground Electrical Installations

Bjelic¹,

Markovic²,

Marković³

et al. 2020

IJIGSP

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Underground installations are networks of metal pipes and cables in space at a certain distance from the ground surface. Insulating layers of metal pipes of underground installations (gas, plumbing, electrical...) do not provide their full protection against corrosion and breakdowns. In urban areas, wandering currents (electric rail or earthing of power plants) repeatedly increase failures in underground installations in the environment. That is why a certain kind of protection is foreseen for the protection of metal pipes of underground installations against corrosion and destruction from wandering currents. However, until today there is no universal method for calculating the parameters of stationary and quasi-stationary electric fields of wandering currents and a general solution for arbitrary configuration, but it is possible to form a model algorithm for controlling the state and failures of insulation of underground electrical installations. Solutions for wandering currents could be determined by the criterion of similarity to transient currents on power lines. In the paper, in program MATLAB Simulink a simulation for the correction of wandering currents using foreign grounding has been performed on certain parts of underground installations. It has been shown that the solution of the task is possible with help of the model-algorythm which allows a determinaitn of the power on isolation layer of the cable sheat, and with simulation of the different versions of schedule of protective equipment, their optimal schedule could be determined.

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Analysis and Estimation of Values of Currents and Voltages at the Disturbances in Induction Machine Using Tested Matlab Simulation

Cited by 6 publications

References 4 publications

The mathematical model for analysis and evaluation of the transient process of the three-phase asynchronous machine performance

The mathematical model for analysis and evaluation of the transient process of the three-phase asynchronous machine performance

The Influence of Magnetic Hysteresis in Magnetic Circuit Sheets on Transient Processes in Electrical Machines

Influence of Metal Pipes in the Environment on Designing the Underground Electrical Installations

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