Journal ArticleDOI
A resistance sign-based method for voltage sag source detection
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TLDR
In this paper, a method to determine the origin of voltage sag disturbance is proposed, which can be easily implemented into power quality meters for troubleshooting applications or into digital revenue meters to document the responsibility for disturbances.Abstract:
A method to determine the origin of voltage sag disturbance is proposed in this paper. Its principle is to estimate the equivalent impedance of the nondisturbance side by utilizing the voltage and current changes caused by the disturbance. The sign of the real part of the estimated impedance can reveal if the disturbance is from upstream or downstream. The proposed method can be easily implemented into power quality meters for troubleshooting applications or into digital revenue meters to document the responsibility for disturbances. Extensive field and laboratory test results have proven the effectiveness and robustness of the proposed method.read more
Citations
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Journal ArticleDOI
Fault Location in Distribution Systems Based on Smart Feeder Meters
TL;DR: In this paper, a fault-location method based on smart feeder meters with voltage sag monitoring capability is proposed, where the main idea is to explore voltage measurements from monitors placed in different buses of distribution systems to estimate the fault location.
Journal ArticleDOI
Fault Location in Distribution Networks by Compressive Sensing
TL;DR: In this article, the authors proposed a compressive sensing-based fault location method for distribution networks, where the voltage sag vector and impedance matrix produce a current vector that is sparse enough with one nonzero element to represent the bus at which a fault occurs.
Journal ArticleDOI
A Novel Method for Single and Simultaneous Fault Location in Distribution Networks
TL;DR: This paper introduces a novel method for single and simultaneous fault location in distribution networks by means of a sparse representation (SR) vector, Fuzzy-clustering, and machine-learning.
Journal ArticleDOI
High Frequency Impedance Based Fault Location in Distribution System With DGs
TL;DR: The proposed method uses high frequency (up to 3 kHz) fault information and short window measurement to avoid the influence of DG control loops and can be employed to distribution systems with multiple branches and laterals.
Journal ArticleDOI
A New Fault Location Technique in Smart Distribution Networks Using Synchronized/Nonsynchronized Measurements
M. Majidi,M. Etezadi-Amoli +1 more
TL;DR: A new impedance-based technique to locate all fault types in distribution networks with/without distributed generators using a new procedure to form an impedance matrix using only series impedances of the distribution lines is introduced.
References
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Journal ArticleDOI
Nonlinear dynamic load models with recovery for voltage stability studies
TL;DR: In this article, a simple dynamic load model is proposed which captures the usual nonlinear steady-state behavior plus load recovery and overshoot, and a simple but important dynamic voltage stability analysis is developed based on the model.
Journal ArticleDOI
Voltage stability analysis using generic dynamic load models
Wilsun Xu,Y. Mansour +1 more
TL;DR: In this article, the authors investigated the dynamic nature of voltage stability using a generic load model representing the dynamic behaviour of aggregate loads, and revealed the mechanism of voltage collapse by examining the interaction of load dynamics with the supply network.
Journal ArticleDOI
A direction finder for power quality disturbances based upon disturbance power and energy
TL;DR: In this paper, the authors used sampled voltage and current waveforms to determine on which side of a recording device a disturbance originates by examining the energy flow and peak instantaneous power for both capacitor energizing and voltage sag disturbances.
Proceedings ArticleDOI
Dynamics of a buck converter with a constant power load
TL;DR: In this article, the buck converter with a constant power load was studied and the line-to-output and control-tooutput transfer functions were derived, for voltage mode control and current mode control, in continuous conduction mode and discontinuous conduction modes.