Methodology for assessment of financial losses due to voltage sags and short interruptions

Chan, Jhan Yhee; Milanović, Jovica V.

doi:10.1109/epqu.2007.4424119

Cited by 28 publications

(11 citation statements)

References 20 publications

(30 reference statements)

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“…Electromagnetic structure has four different working states, including closed, releasing, released and attracting. The following conclusions can be deduced from formula (1) and (2).…”

Section: Operation Principle Of Electromagnetic Structurementioning

confidence: 77%

Test and study on sensitivity of electronic circuit in low‐voltage release to voltage sags

Ouyang

Liu

2017

IET Circuits, Devices & Syst

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This study focuses on sensitivity of electronic circuit in low-voltage release to voltage sags based on a large-scale test results. Although studies about ride-through capability of some electronic devices during voltage sags have been carried out, there is few research available on sensitivity of electronic circuit in low-voltage release to voltage sags. Operation principle and working states of electromagnetic structure are discussed. Subsequently, a detailed test scheme is proposed based on latest standards and several kinds of 220 V low-voltage releases have been tested. Test results indicate that output waveform of electronic circuit under voltage sags can be classified into two types, which shows a clear correspondence with working state of electromagnetic structure and tripping condition of low-voltage release. Finally, six working modes are presented to analyse the relationship between output waveform of electronic circuit and the magnitude and duration of voltage sags in details.

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“…Electromagnetic structure has four different working states, including closed, releasing, released and attracting. The following conclusions can be deduced from formula (1) and (2).…”

Section: Operation Principle Of Electromagnetic Structurementioning

confidence: 77%

Test and study on sensitivity of electronic circuit in low‐voltage release to voltage sags

Ouyang

Liu

2017

IET Circuits, Devices & Syst

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“…Breakdown of electric motors owing to the voltage sags is a serious problem in the industry. This is also associated with significant monetary loss [9]- [11]. Many studies have explored the effects of voltage sag on the functioning of an induction motor [12]- [18].…”

Section: Introductionmentioning

confidence: 99%

Analytical assessment of torque and stator currents of an induction motor due to voltage sags

Huchche¹,

Patne

2023

IJECE

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<span lang="EN-US">Voltage sag is a frequently encountered phenomenon in a power system to which many three phase induction motors are directly connected. This paper presents a simple analytical method for calculation of net electro-magnetic torque and stator currents of an induction motor subjected to symmetrical as well as unsymmetrical sags in supply voltage. This work presents an innovative path to compute net electro-magnetic torque and increase in stator currents for all seven types of sags using the well-known symmetrical component theory. Such a simple method and expressions used in this paper are not reported in the literature reviewed so far. The computation is further extended for different load conditions while varying the symmetrical sag magnitude. The simplicity of analytical assessment of loading effect on electro-magnetic torque from no-load to full-load condition for all sag types is presented. The outcome of the study was verified by imitating the environments for various types of sag in MATLAB/Simulink. The observations are that the average output torque of a motor decreases and ripple in power increases during unsymmetrical sags.</span>

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“…Moreover, the equipment performs differently under various voltage sags, which leads to uncertainty in equipment malfunction [14]. To account for this uncertainty, various methods have been used to evaluate equipment sensitivity to voltage sag, including probabilistic methods [15], [16] and fuzzy logic [17]. Probabilistic methods possess the advantages of less computation and straightforward results and are exploited to evaluate voltage sag severity.…”

Section: Introductionmentioning

confidence: 99%

Evaluation Method and Probabilistic Index of Voltage Sag Severity Considering Point-on-wave

Gao

Zhong

et al. 2021

Journal of Modern Power Systems and Clean Energy

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The impact of voltage sag on sensitive devices is related to the time when the sag occurs. However, the point-onwave of a sag is uncertain. Therefore, this paper presents a novel approach to evaluate the voltage sag severity considering a random point-on-wave. First, the uncertainty of equipment malfunction is revealed. Second, under a given residual voltage, the relationship between the point-on-wave and the duration that the device can withstand is described with a fitting curve. Third, a voltage sag probabilistic index is proposed to describe the severity. The evaluation procedure is also presented. Finally, three types of releasers are tested and analyzed to determine the effectiveness of the proposed method. The evaluation method can help instruct electrical engineers establish more wellgrounded sag mitigation proposals.

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Methodology for assessment of financial losses due to voltage sags and short interruptions

Cited by 28 publications

References 20 publications

Test and study on sensitivity of electronic circuit in low‐voltage release to voltage sags

Test and study on sensitivity of electronic circuit in low‐voltage release to voltage sags

Analytical assessment of torque and stator currents of an induction motor due to voltage sags

Evaluation Method and Probabilistic Index of Voltage Sag Severity Considering Point-on-wave

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