An efficient method for investigating the ferroresonance of single-phase iron core devices

Cazacu, Emil; Ioniţă, Valentin; Petrescu, Lucian

doi:10.1109/atee.2017.7905167

Cited by 12 publications

(6 citation statements)

References 30 publications

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“…Ferroresonance is a complex nonlinear phenomenon that occurs rarely and is difficult to predict [12,16,21,32]. Ferroresonance can occur in electrical networks where there is an inductive element that can go into saturation ( reactor, transformer), a capacitive element (capacitor, cables, long lines), an AC source, and low damping (light load or no load) [12,21,33].…”

Section: Ferroresonancementioning

confidence: 99%

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Effect of Harmonics on Ferroresonance in Low Voltage Power Factor Correction System—A Case Study

Kutija

Pravica

2021

Applied Sciences

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This paper presents a case study of three-phase ferroresonance in a low-voltage power factor correction system and investigates the influence of harmonic distortion on the occurrence of ferroresonance. Ferroresonance is an extremely dangerous and rare phenomenon that causes overvoltages and overcurrents in the system and degrades the power quality. The study is carried out on real field measurements in an industrial plant where ferroresonance occurs in the power factor correction (PFC) system at the detuned reactor. The three-phase ferroresonance analysed in this paper is an extremely rare phenomenon that has never been reported in this type of configuration. The measurement results have shown that in this type of configuration the high harmonic distortion is a necessary condition for ferroresonance to occur. In such conditions, switching on the capacitor stage triggers the ferroresonance with quasi-periodic oscillations supported by the medium voltage grid. The main contribution is the analysis of the three-phase ferroresonance in the detuned PFC system and the influence of the harmonics on the occurrence of the ferroresonance in such a case. The possible solutions to this problem and recommendations to avoid this phenomenon are discussed.

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Section: Ferroresonancementioning

confidence: 99%

“…are reduced, and as a result there is not enough load to attenuate the ferroresonance. This makes the occurrence of ferroresonance more likely today than in the past [11,15,32]. In general, nonlinear systems theory and chaos are used to analyze ferroresonance, as well as bifurcation diagrams and Poincare mappings [21,32].…”

Section: Ferroresonancementioning

confidence: 99%

Effect of Harmonics on Ferroresonance in Low Voltage Power Factor Correction System—A Case Study

Kutija

Pravica

2021

Applied Sciences

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“…However, in this paper the ferroresonant circuit is analyzed differently, using diagnostic methods. In the diagnostic approach the ferroresonance can be characterized by using either a spectral study method based on Fourier's analysis or a stroboscopic analysis based on Poincaré maps [60][61][62]. These can be used to differentiate between ferroresonance states (e.g., a quasi-periodic state from a chaotic state).…”

Section: Analysis Of Ferroresonancementioning

confidence: 99%

Diagnostic approach in assessment of a ferroresonant circuit

Majka

Klimas

2019

Electr Eng

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This paper presents possibilities offered by a diagnostic system called FeD. The system is completely original; it has been developed by the authors on the basis of Arduino platform. The system has been designed to perform and record measurements and to carry out different numerical operations. The real-time function for several operations is incorporated in this system. The necessary input data for the system consist of the electrical voltage waveforms only. Rescaled voltage quantities can be displayed, measured, recorded or computed in any chosen way. The system has been developed particularly for measurements and computations in the ferroresonant circuits. The strongest part of the system is its versatility. It works with a standard PC and supports a universal connection (USB standard). This is undeniably a cost-wise solution. Driving and control of the system functions are carried out using the authors' original software implemented in SciLab environment. This is free software, similar to and compatible with other existing CAD programs such as Octave and MATLAB. The obtained data, scripts and results can be freely transferred between them. The program is equipped with a transparent GUI. The need of constructing a special system to diagnose the ferroresonant circuit has emerged during earlier ferroresonance analyses and computations. Every ferroresonant circuit requires specific kind of diagnostics to estimate and display its base features in order to determine the best scientific approach to the problem. The ferroresonance phenomenon belongs to the domain of nonlinear problems. Its analysis requires excellent skills in mathematics and physics as well as computer science. Moreover, this subject also requires specialized engineering knowledge, particularly in the field of power engineering and power system equipment. Modern mathematical models and analyses used in ferroresonant computations are quite accurate; however, in case of a common user, they are often difficult to understand or implement. This paper provides full description of construction, features and test results of the developed hardware/software system designed for diagnostics of ferroresonant circuits. The test circuit case study has been performed in the entire power supply range. Results of measurements and computations as well as screenshots captured from authors' original software are shown in different figures. The developed software and recorded data have been finally used in modeling and further simulations. During this, the application of the fractional derivative iron core coil model to ferroresonance analysis has been shown. The waveforms obtained from computer simulations have been compared with those obtained from measurements performed in the test circuit.

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“…For motors with higher power units, one may apply, depending on power level the machine and its operating mode, the following classical procedures [1][2][3][4][5]: star-delta starter, rheostat starters, series stator coils, autotransformer starter, or more recently, the usage of static power converters [8][9][10][11][12]. For motors driven by variable-frequency drive, energising is performed implicitly with a voltage-frequency control [9][10][11][12][13][14][15].…”

Section: The Motor Inrush Current Controlmentioning

confidence: 99%

“…In this particular transient state, the basic electrical and mechanical machine parameters changes as the rotor accelerates. The inrush currents associated with the motor connection to the network have values that could exceed the motor rated currents and exhibit special distorted waveforms [7][8][9][10][11][12][13]. These features of these inrush currents additionally stress up both the motor by increasing the losses within the motor and the supply network by adversely affecting the other loads or receptacles, connected at the common coupling point [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Transient State Characterization of Asynchronous Motors in Modern Low-Voltage Electric Installations

Cazacu

Ioniţă

Petrescu

2018

The Scientific Bulletin of Electrical Engineering Faculty

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Low-voltage asynchronous motor is the most common load used in any industrial electric facility. Due to their robustness and reliability, the induction motors have a very large application spectrum and are to be found in a variety of power units. It is assumed that over 70% of total energy used in any electric utility is dedicated to the electric motor drive systems. The paper quantitatively studies the transient state of such motors, which occurs at their start-up. The waveforms characteristics of these inrush currents are predetermined mainly by solving the associated differential equations that describe the dynamic phenomena at their start-up. An experimental investigation on an induction motor of 4 kW is also carried out. Supplementary, different solutions for the energising of these low-voltage motors are presented highlighting their performances and limits. These methods are critically rated according to their mitigation ability of the power quality issues associated with the energizing process.

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An efficient method for investigating the ferroresonance of single-phase iron core devices

Cited by 12 publications

References 30 publications

Effect of Harmonics on Ferroresonance in Low Voltage Power Factor Correction System—A Case Study

Effect of Harmonics on Ferroresonance in Low Voltage Power Factor Correction System—A Case Study

Diagnostic approach in assessment of a ferroresonant circuit

Transient State Characterization of Asynchronous Motors in Modern Low-Voltage Electric Installations

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