Voltage sag source location: A review with introduction of a new method

Moradi, Mohammad H.; Mohammadi, Younes

doi:10.1016/j.ijepes.2012.04.041

Cited by 27 publications

(15 citation statements)

References 19 publications

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“…It has been developed for fault direction estimation in radial distribution networks with DG. The second method [30] uses magnitude change in the positive-sequence current phasor as an additional criterion. Note, that only the extended method [30] is discussed further on and is given by…”

Section: Existing Methods Based On a Positive-sequence Current Phasormentioning

confidence: 99%

“…Several methods for the detecting and tracking of voltage sag sources have already been reported and reviewed . Methods for upstream-downstream detections of voltage sag sources are based on different criteria, such as disturbance energy [12][13][14][15][16], voltage-current characteristics [17,18], incremental impedance [19][20][21][22], voltage characteristics [27,28] and current change [29,30]. Furthermore, statistical methods have been applied to increase the effectiveness and degree of confidence.…”

Section: Introductionmentioning

confidence: 99%

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Instantaneous positive‐sequence current applied for detecting voltage sag sources

Polajžer

Štumberger

Dolinar

2015

IET Generation, Transmission & Distribution

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This study proposes a method for detecting voltage-sag sources, using only the measurements of line currents. Instantaneous symmetrical components are introduced for accommodating the transient nature of voltage sag events, where a magnitude and phase change in the instantaneous positive-sequence current is used as a criterion. The proposed method is compared with conventional phasor-based methods known from the literature. All the discussed methods for voltage sag source detection, both the already known and the proposed ones, were evaluated by applying extensive simulations, laboratory tests and field testing. When compared with the phasor-based methods, the proposed method showed faster response, a higher degree of confidence and superior effectiveness, especially for transient voltage sag events in networks with distributed generation and active loads.

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Section: Existing Methods Based On a Positive-sequence Current Phasormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Instantaneous positive‐sequence current applied for detecting voltage sag sources

Polajžer

Štumberger

Dolinar

2015

IET Generation, Transmission & Distribution

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“…25,26 Methods in the fifth category locate the sag source based on current information only. The first method proposed in this category 27 was based on the phase changes in the positive-sequence current and because of its application in radial systems, Moradi et al proposed the following method, 28 which used a magnitude change in the positive-sequence current as an extra criterion to the method of. 27 The testing of certain mentioned methods known from the literature showed that in the cases of asymmetrical sags, these methods were rather ineffective.…”

Section: Previous and Related Workmentioning

confidence: 99%

Relative location of voltage sags source at the point of common coupling of constant power loads in distribution systems

Mohammadi

Leborgne

2020

Int Trans Electr Energ Syst

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Summary Constant power (Scte) loads such as large induction motors or power converters in customer facilities of distribution systems have a significant effect on the fault currents and thus on the relative location of voltage sag sources. This paper evaluates the methods for determining the relative location of voltage sag sources at the point of common coupling (PCC) of Scte loads. The results of simulating 800 voltage sag events on IEEE 13 bus unbalance system (modelled by ATP) show that many of the methods fail at classifying upstream (US) faults at the PCC of Scte loads. Therefore, a new method is introduced using the ratio of current magnitudes and changes of power angle in positive sequence components, during and before the voltage sag, with a determined threshold for the currents and a specified tolerance for the power angle obtained from voltage sags generated by different fault types. The results obtained in the proposed index for similar simulation cases show that the method applied to monitors installed at the PCC of the Scte loads is very accurate. Also, the proposed index is effective for higher resistance faults and changes in the short circuit capacity (SCC) of the main grid.

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“…Nowadays, voltage dips and supply interruptions are the most important power quality (PQ) concerns faced by customers [1][2][3][4]. In fact, total complaints related to voltage dips account for 80% of total PQ transient complaints [5].…”

Section: Introductionmentioning

confidence: 99%

“…Voltage tolerance curves (at 100% fail probability) depending of the type of load 1. For interpretation of color inFig.…”

mentioning

confidence: 99%

Load influence on the response of AC-Contactors under power quality disturbances

Honrubia-Escribano

Gómez‐Lázaro

Molina‐García

et al. 2014

International Journal of Electrical Power & Energy Systems

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Voltage sag source location: A review with introduction of a new method

Cited by 27 publications

References 19 publications

Instantaneous positive‐sequence current applied for detecting voltage sag sources

Instantaneous positive‐sequence current applied for detecting voltage sag sources

Relative location of voltage sags source at the point of common coupling of constant power loads in distribution systems

Load influence on the response of AC-Contactors under power quality disturbances

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