Location of Single Phase to Ground Faults in Distribution Networks Based on Synchronous Transients Energy Analysis
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TLDR
A fault location method based on the analysis of the energy of the transient zero-sequence current in the selected frequency band (SFB) is proposed and the implementation scheme is illustrated with the distribution level phasor measurement units.Abstract:
As a result of small fault current, high level of noise and a large penetration of distributed generators (DG), in the neutral non-effectively grounded medium-voltage (MV) distribution networks, it is quite difficult to locate the faulted line section for single phase to ground faults. In this paper, using a technique based on synchronized measurements in distribution networks, a fault location method based on the analysis of the energy of the transient zero-sequence current in the selected frequency band (SFB) is proposed. The equivalent impedance of the distribution network with lateral branches is studied with an equivalent network, and the phase-frequency characteristics of the equivalent impedance are analyzed. The SFB, within which the transient energy of the faulty line section is larger than that of the healthy line sections is determined. A combined fault-section location criterion is proposed and the implementation scheme is illustrated with the distribution level phasor measurement units. Numerical simulations of the IEEE 34 node system and the field experiments of a 10kV distribution network validate the feasibility and effectiveness of the proposed method.read more
Citations
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A Survey of Fault Prediction and Location Methods in Electrical Energy Distribution Networks
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Location of Single-Line-to-Ground Fault Using 1-D Convolutional Neural Network and Waveform Concatenation in Resonant Grounding Distribution Systems
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TL;DR: The analysis and results in this paper provide new insights on possible applications of synchronized WMU measurements; while they also address a highly challenging problem in power distribution networks.
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Faulty Feeder Detection Based on Fundamental Component Shift and Multiple-Transient-Feature Fusion in Distribution Networks
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Single-phase-to-ground fault section location in flexible resonant grounding distribution networks using soft open points
TL;DR: A method based on low-frequency signal superposition to locate SPG faults in RG distribution systems using a soft open point (SOP) and an adaptive current criterion for fault section location is proposed.
References
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Precision Micro-Synchrophasors for Distribution Systems: A Summary of Applications
TL;DR: In this article, the authors describe high-level findings from an innovative network of high-precision phasor measurement units (PMUs), or micro-PMUs, designed to provide an unprecedented level of visibility for power distribution systems.
Proceedings ArticleDOI
Micro-synchrophasors for distribution systems
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A new deal for safety and quality on MV networks
TL;DR: The authors of this paper summarize the major possible alternatives and the reasons which may lead a utility to modify its original choices and the result of this analysis is the decision to change the neutral earthing of rural MV networks.
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Path Characteristic Frequency-Based Fault Locating in Radial Distribution Systems Using Wavelets and Neural Networks
TL;DR: In this paper, a neural network-based methodology is proposed as a power distribution line fault locator, where the transient voltage is decomposed by a wavelet filter and its energy spectrum is decomosed into different levels.
Journal ArticleDOI
Identifying Single-Phase-to-Ground Fault Feeder in Neutral Noneffectively Grounded Distribution System Using Wavelet Transform
Xinzhou Dong,Shenxing Shi +1 more
TL;DR: In this paper, a single-phase-to-ground fault feeder identification in distribution networks with the application of a wavelet transform technique is presented, which uses zero-sequence current traveling waves to identify the faulted feeder, and the busbar residual voltage to determine an event caused by fault or switch operation.