Laboratory Work in Teaching Basic Three-Phase Electrical Circuits

This paper proposes a solution for carrying out laboratory work in the strict conditions of the Covid - 19 pandemic. The traditional laboratory can be replaced by the virtual laboratory or the remote laboratory, depending on the requirements of the course and the skills required for the training of engineers. The environment for performing alternative laboratory work (Virtual or Remote Laboratory) is the Multisim software from National Instruments. The student with the help of this software can make the electrical circuits provided in the curriculum of the discipline of General Electrical Engineering. This paper presents four examples of alternative laboratory works for the field of electrical engineering, namely, three-phase electrical circuits, static electrical converters, asynchronous motor and electric drive system. The student can simulate the required regimes in the laboratory guide and is free to simulate other regimes at his own initiative. The paper ends with the proposal of a step-by-step algorithm, which can be a guide for any teacher who wants to organize alternative laboratory work.

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Geometric Algebra Framework Applied to Symmetrical Balanced Three-Phase Systems for Sinusoidal and Non-Sinusoidal Voltage Supply

Mathematics ◽

10.3390/math9111259 ◽

2021 ◽

Vol 9 (11) ◽

pp. 1259

Author(s):

Francisco G. Montoya ◽

Raúl Baños ◽

Alfredo Alcayde ◽

Francisco Manuel Arrabal-Campos ◽

Javier Roldán Roldán Pérez

Keyword(s):

Geometric Algebra ◽

Dimensional Euclidean Space ◽

Active Components ◽

Electrical Circuits ◽

Current Harmonics ◽

Operation Conditions ◽

Multiple Phase ◽

Three Phase ◽

Phase Systems ◽

Definition Of

This paper presents a new framework based on geometric algebra (GA) to solve and analyse three-phase balanced electrical circuits under sinusoidal and non-sinusoidal conditions. The proposed approach is an exploratory application of the geometric algebra power theory (GAPoT) to multiple-phase systems. A definition of geometric apparent power for three-phase systems, that complies with the energy conservation principle, is also introduced. Power calculations are performed in a multi-dimensional Euclidean space where cross effects between voltage and current harmonics are taken into consideration. By using the proposed framework, the current can be easily geometrically decomposed into active- and non-active components for current compensation purposes. The paper includes detailed examples in which electrical circuits are solved and the results are analysed. This work is a first step towards a more advanced polyphase proposal that can be applied to systems under real operation conditions, where unbalance and asymmetry is considered.

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A comparative study of LC filter and damper winding for noise reduction of PWM-fed IM

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209513 ◽

2020 ◽

pp. 1-11

Author(s):

François Balavoine ◽

Grégory Bauw ◽

Bertrand Cassoret ◽

Raphaël Romary

Keyword(s):

Comparative Study ◽

Noise Reduction ◽

Induction Machines ◽

Electrical Circuits ◽

Pwm Inverter ◽

Advantages And Disadvantages ◽

Density Reduction ◽

Harmonic Reduction ◽

Three Phase ◽

Lc Filter

In this paper, two passive solutions for noise reduction of PWM-fed induction machines are compared: the use of LC filter connected between the PWM inverter and the machine, and a three-phase damper wound inside the machine and connected to three capacitors. Firstly, the principle, advantages and disadvantages of each solution are recalled. The equivalent electrical circuits used for the study are also explained. Then, the effectiveness of both solutions in terms of voltage harmonic reduction and harmonic flux density reduction is discussed. The weight and size criteria are also studied. Results are given for two different power ranges of induction machines: 4 kW and 55 kW, and for two different switching frequencies of the PWM inverter: 3 kHz and 8 kHz.

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Geometric algebra framework applied to Symmetrical Balanced Three-Phase Systems for Sinusoidal and Non-Sinusoidal Voltage Supply

10.22541/au.160854230.09514347/v1 ◽

2020 ◽

Author(s):

Francisco Montoya ◽

Raul Baños ◽

Alfredo Alcayde ◽

Francisco M. Arrabal-Campos ◽

Javier Roldan-Perez

Keyword(s):

Geometric Algebra ◽

Dimensional Euclidean Space ◽

Active Components ◽

Electrical Circuits ◽

Current Harmonics ◽

Three Phase ◽

Phase Systems ◽

Definition Of ◽

Conservation Theorem ◽

New Framework

This paper presents a new framework based on geometric algebra (GA) for solving and analysing three-phase balanced electrical circuits under sinusoidal and non-sinusoidal conditions. The proposed approach is an application of the geometric algebra power theory (GAPoT) to three-phase systems. Calculations are performed in a multi-dimensional Euclidean space where cross effects between voltage and current harmonics are taken into consideration. A definition of geometric apparent power for three-phase systems that complies with the energy conservation theorem is introduced. By using the proposed framework, the current can be easily decomposed into active- and non-active components for current compensation purposes. The paper includes detailed examples in which electrical circuits are solved and the results are analysed. This work is a first step towards a more advanced polyphase proposal with realistic cases, where unbalance and asymmetry is included.

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Simulation of Atmospheric Discharge at Power Line

AUTOMATYKA ELEKTRYKA ZAKLOCENIA ◽

10.17274/aez.2020.41.01 ◽

2020 ◽

Vol 11 ◽

pp. 8-14

Author(s):

Andrzej J. Skiba ◽

Keyword(s):

Computer Simulations ◽

Transmission Lines ◽

Power Line ◽

Frequency Spectra ◽

Electrical Circuits ◽

Distributed Parameters ◽

Three Phase ◽

Atmospheric Discharge ◽

Atmospheric Discharges

Modelling electrical circuits by application of schemes containing elements with distributed parameters such as transmission lines has been applied in this research. Functions approximating voltage or current atmospheric discharges have been presented together with frequency spectra of these functions. The results of computer simulations obtained with the help of PSpice software have been presented for a simplified three-phase circuit subject to such discharge.

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