Effects of various unbalanced voltages on the operation performance of an induction motor under the same voltage unbalance factor condition

In industries, electric motors contribute a major percentage of electrical loads, and by implication, a major portion of the generated electrical energy is consumed by electric motors, and it is therefore vital to ensure that these motors operate with negligible energy loss. In operational environment, many factors can be responsible for a reduction in motor performance. One of the major factors is a regime of voltage unbalance that affects the motor, the load and supply network. Three phase induction motor studies can be carried out using methods such as real load test, finite element analysis, flux linkage-current relations etc. A new model based on phase frame analysis has been developed for easy computation of sequence components. This paper seeks to explore the performance of a 3-phase induction motor operating under unbalance voltage conditions using the phase frame analysis. The results of this study established that there are negative impacts of supply imbalance on the performance of three phase motor.

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“…This difference becomes significant for high level of unbalance when the NEMA definition is used. According to the works of [4,[8][9][10] (1)…”

Section: Definitions Of Voltage Unbalancementioning

confidence: 99%

The performance of a 3-Phase Induction Machine under Unbalance Voltage Regime

Adekitan¹,

Ogunjuyigbe²,

Ayodele³

et al. 2017

JESTR

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“…The result of superposition decides the condition of over and under voltage. If positive sequence component of voltage disturbed in such a way that it magnitude become less than one (in pu) then this event is under-voltage whereas for more than one (in pu), the condition is over -voltage [18].…”

Section: Symmetrical Component Analysis Of Im and Pattern Of Unbalancmentioning

confidence: 99%

“…It can be observed from Fig. 4, that the positive sequence voltage is exactly reflected in k z for any value of k v , and hence it can be consider as the reflection of positive sequence voltage, which is deciding factor for the condition of unbalance [18]. In this section, k z , k ν , and θ v have been taken into consideration for the precise assessment of the performance of IM under different degree and manner of supply voltage unbalance.…”

Section: Pattern Of Voltage Under the Condition Of Supply Voltage Unbmentioning

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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“…1159-1995, for example; voltage unbalance, voltage sags, voltage swells, partial or total loss of one or more phases. Voltage unbalance can occur due to an incomplete transposition of transmission lines, unbalanced loads, open delta transformer connection, disconnected three-phase capacitor bank and the proliferation of nonlinear and large single-phase loads [1] . Voltage unbalance worsens the operation of AC electric machines.…”

Section: Introductionmentioning

confidence: 99%

A Fast Series Active Filter using Sliding Mode Control to Correct and Regulate Unbalance Voltage in Three-Phase System

Chatchanay

2009

American J. of Engineering and Applied Sciences

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Problem statement:A Sliding Mode Controller (SMC) with fast reference voltage generation to correct and regulate unbalance voltage in three-phase system was proposed. Approach: The compensation algorithm was not based on three-symmetrical component decomposition so the controller can yield a fast response that was essential in such a critical real time control work. The reference voltages were fed to the SMC, which was a robust closed loop controller. Results: The proposed algorithm and control scheme of series active filter could correct and regulate unbalance voltage in three-phase system under arbitrary fault conditions of the utility supply. Conclusion: A design example and its simulation results proved the concept and validated the proposed algorithm.

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Effects of various unbalanced voltages on the operation performance of an induction motor under the same voltage unbalance factor condition

Cited by 55 publications

References 5 publications

The performance of a 3-Phase Induction Machine under Unbalance Voltage Regime

The performance of a 3-Phase Induction Machine under Unbalance Voltage Regime

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

A Fast Series Active Filter using Sliding Mode Control to Correct and Regulate Unbalance Voltage in Three-Phase System

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