Windings Temperature and Loss of Life of an Induction Machine Under Voltage Unbalance Combined With Over- or Undervoltages

Gnaciński, Piotr

doi:10.1109/tec.2008.918596

Cited by 94 publications

(76 citation statements)

References 21 publications

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“…For instance, the damage of the auxiliary engines by unbalanced distortions may cause engine bearings malfunction and lead to the generator breakdown [4]. This may also cause overheating of the bearings when the generator cut in again [5] or significantly faster degradation of equipment insulation (thermal ageing), and result in failure and/or malfunctions in SMGs [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Power Quality Assessment in Shipboard Microgrids Under Unbalanced and Harmonic AC Bus Voltage

Liu

Tarasiuk

Górniak

et al. 2019

IEEE Trans. on Ind. Applicat.

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Abstract-Power quality (PQ) is becoming more and more critical issue in shipboard microgrid systems (SMG). Especially, the impact of voltage unbalance combined with harmonic distortions on the SMG behavior has not been fully investigated. In this paper, simple power quality assessment models and a series of controlled experiments are proposed and carried out in a real ship under seagoing conditions. The ship experimental results are presented and discussed considering non-linear bow thruster load and high power ballast pump loads under unbalanced and harmonic voltage conditions. In addition, the analysis of bow thruster current harmonic surges during the ballast pump start-up is presented. Furthermore, the voltage/current distortions of working generator, bow thruster and pump loads are analyzed. The paper provides a valuable analysis for coping with PQ issues in the SMG.

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Section: Introductionmentioning

confidence: 99%

Power Quality Assessment in Shipboard Microgrids Under Unbalanced and Harmonic AC Bus Voltage

Liu

Tarasiuk

Górniak

et al. 2019

IEEE Trans. on Ind. Applicat.

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“…However, the actual PQ events generally consist of two or more SPDs which occur simultaneously, i.e., MPDs [10,11]. These MPDs, including sag, swell, interruption, harmonic, flicker, oscillation, impulse, notch and other SPDs proposed in [12][13][14][15], carry a high risk of causing economic losses and serious damage to electrical elements. For instance, the arc voltage, which is composed of harmonics, transients and voltage sag, may lead to severe short-circuit and fire hazard owing to its mobility and the increment of resistance temperature [16].…”

Section: Introductionmentioning

confidence: 99%

On the Application of Joint-Domain Dictionary Mapping for Multiple Power Disturbance Assessment

Cai

et al. 2018

Energies

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This paper proposes a joint-domain dictionary mapping method to obtain high assessment accuracy of multiple power disturbances. Firstly, in order to achieve resolutions in both the time and frequency domains, a joint-domain dictionary is proposed which consists of a discrete Hartley base and an identity matrix. Due to the low correlation between the discrete Hartley base and the identity matrix, the joint-domain dictionary mapping can separately capture the approximations of the sinusoidal components and transients. Since the mapping coefficients contain the physical quantities, the eigenvalues of each component can be effectively estimated. A quantified eigenvalue classifier was designed for identifying power disturbances using the estimated eigenvalues. The proposed method was compared with several advanced methods through simulated power disturbances under different noise conditions, and actual data from the Institute of Electrical and Electronics Engineers Power and Energy Society database. The results reveal that the joint-domain dictionary mapping technique shows good performance on parameter estimation and recognition precision, even dealing with complicated multiple power disturbances.

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“…Due to poor PQ, billions of dollars are being wasted every year. Voltage unbalance exist due to the incomplete transposition of transmission line, unbalance load, open delta transformer connection, uneven distribution of single phase load [1][2][3][4][5][6] is now considered as the one of the most important aspect of PQ disturbances. Based on ANSI report presented in [3], the 32 % of the USA electrical distribution system have degree of voltage unbalance lies between 1 and 3 % whereas 2 % of distribution system have degree of unbalance more than 3 %.…”

Section: Introductionmentioning

confidence: 99%

“…Based on ANSI report presented in [3], the 32 % of the USA electrical distribution system have degree of voltage unbalance lies between 1 and 3 % whereas 2 % of distribution system have degree of unbalance more than 3 %. According to IEC recommendation the maximum voltage unbalance of supply system should be not more than 2 % [3,4] where as NEMA MG1-1993 "Motor and Generator" recommends that for voltage unbalance greater than 1 %, Induction motor (IM) should be derated [3]. The voltage unbalance in three phase system is practically impossible to be obviated due to their inherent causes and further this problem is aggravated by the fact that the presence of small unbalance in three phase system will causes the unproportional unbalance in the line current [5].…”

Section: Introductionmentioning

confidence: 99%

Precise Assessment of Performance of Induction Motor under Supply Imbalance Through Impedance Unbalance Factor

Singh¹,

Singh²

2013

Journal of Electrical Engineering

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This paper presents precise assessment of steady-state performance of induction motor (IM) operating under voltage unbalance. The variation of two voltage unbalance factors viz. complex voltage unbalance factor (CVUF) and impedance unbalance factor (IUF) with positive sequence voltage component, reveals that degree and manner of unbalance in supply voltage is exactly reflected in CVUF and IUF, respectively. On this basis, it is shown that for the precise assessment of IM performance, knowledge of both, manner (IUF) and degree (CVUF) of unbalance is important. Further, effect of angle of unbalance, on the performance of the IM and voltage pattern is analyzed. Results depict high sensitivity of derating factor and peak copper losses to this angle. Thus, it should be included along with unbalance factors for the precise and complete performance assessment of IM.

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Windings Temperature and Loss of Life of an Induction Machine Under Voltage Unbalance Combined With Over- or Undervoltages

Cited by 94 publications

References 21 publications

Power Quality Assessment in Shipboard Microgrids Under Unbalanced and Harmonic AC Bus Voltage

Power Quality Assessment in Shipboard Microgrids Under Unbalanced and Harmonic AC Bus Voltage

On the Application of Joint-Domain Dictionary Mapping for Multiple Power Disturbance Assessment

Precise Assessment of Performance of Induction Motor under Supply Imbalance Through Impedance Unbalance Factor

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