عنوان البحث | ملخص البحث | Research Abstract |
DWT-based detection and transient power direction-based location of high-impedance faults due to leaning trees in unearthed MV networks | | Nordic countries. This fault type has been studied in [1] and it was found that the initial
transients in the electrical network due to the associated arc reignitions are behavioral traits.
In this paper, these features are extracted us |
An adaptive single pole autoreclosure based on zero sequence power | | a novel adaptive single pole autoreclosure is introduced. This reclosure is
based on monitoring the fundamental component of the zero sequence instantaneous
power to detect the extinction instant of the arc in its secondary period. Thus |
A novel selectivity technique for high impedance arcing fault detection in compensated MV networks | | Abstract In this paper, the initial transients due to arc reignitions associated with high
impedance faults caused by leaning trees are extracted using discrete wavelet transform
(DWT). In this way, the fault occurrence is localized. Th |
DWT‐based extraction of residual currents throughout unearthed MV networks for detecting high‐impedance faults due to leaning trees | | Modelling of a high-impedance arcing fault due to a leaning tree in medium voltage (MV) networks was experimentally verified and the network transients due to this fault were also investigated. Even though the tree had a very high resistanc |
DWT-based investigation of phase currents for detecting high impedance faults due to leaning trees in unearthed MV networks | | In this paper, features of earth faults due to leaning trees are extracted from the network phase currents using the discrete wavelet transform (DWT). Due to the associated arc reignitions, the initial transients in the electrical network g |
Enhanced commutation circuit design of hvdc circuit breaker using EMTP | | In this paper, electromagnetic transient program (EMTP) aided design tool for active commutation circuit of an HVDC circuit breaker is presented. The breaker arc is modeled using the modified Mayr equations, and its interaction with the act |
Real-time testing of hvdc circuit breakers part 1: bench test development | | In this paper, a new real-time testing technique for hvdc circuit breakers using the Electromagnetic Transient Program (EMTP) is presented. Full-size controlled converters are accurately modeled and different system topologies with hvdc cir |
Feature Extraction of High impedance arcing Faults in Compensated MV Networks. Part I: DWT-Based Analysis of Phase Quantities | | In this paper, the initial transients in the electrical network due to arc reignitions
associated with high impedance faults caused by leaning trees are extracted from phase
voltages and currents. The Discrete Wavelet Transform (DWT) is |
Modeling and experimental verification of a high impedance arcing fault in MV networks | | -In this paper, a high impedance arcing fault of the tree leaning type in medium
voltage (MV) networks is modeled and experimentally verified. The fault is represented as
two parts; an arc model and a high resistance. The arc is generat |
Verification of DWT-based detection of high impedance faults in MV networks | | Abstract The faults due to leaning trees are common in Nordic Distribution networks. In [1],
the detection of this fault type has been discussed and the faulty section has been estimated
using a novel selectivity technique. This detecti |
Real-time testing of HVDC circuit breakers part II: Real-time cases | | Abstract-A new real-time testing technique for hvdc breakers using the Electromagnetic
Transient Program (EMTP) has been proposed. In this paper, different topologies of hvdc
systems with full-size controlled converters are accurately m |
DWT-BASED DETECTION OF HIGH IMPEDANCE FAULT DUE TO LEANING TREES IN COMPENSATED MV NETWORKS | | ABSTRACT Features of faults due to leaning trees are extracted using discrete wavelet
transform (DWT) and an absolute sum of the detail coefficient d3 over a period of power
frequency cycle is used as a detector. DWT is processed on the |
Operation evaluation of DWT-based earth fault detection in unearthed MV networks | | A novel selectivity technique to estimate the faulty feeder in MV networks was
introduced in [1]. This technique depended on the directionality of Discrete Wavelet
Transform (DWT) detail coefficient of a residual current of each feeder |
Overvoltage investigation of wind farm under lightning strokes | | Wind turbine generators are frequently subjected to lightning due to their locations
and height. So, the performance of wind farm under such events is worthy investigated. This
paper studies the surge propagation through wind farm when |
Clean fog evaluation of RTV silicone rubber coatings with different thicknesses and pollution levels | | Coating of room-temperature vulcanized (RTV) silicone rubber is increasingly
being used by power transmission utilities. This is to overcome the contamination problems
encountered in porcelain and glass insulators particularly under wet |
High‐frequency modeling of Zafarana wind farm and reduction of backflow current‐overvoltages | | The wind turbine is subjected to lightning due to its geographical location and
size. The struck wind turbine suffers from backflow current-overvoltages affected by the
grounding system. This issue is highlighted in this paper, and, the |
Experimental evaluation of air-termination systems for wind turbine blades | | In this paper, air-termination systems for wind turbine blades reported in IEC-61400-
24 standard are evaluated experimentally. These systems are such as receptor, metallic
mesh and metallic conductor on the blade edges. In addition to t |
Evaluation of different grounding models for studying backflow current-overvoltages in wind farm | | |
Evaluation of RTV Silicone Rubber Coatings of Different Thicknesses and Pullution Levels under Clean Fog Conditions | | |