عنوان البحث | ملخص البحث | Research Abstract |
Universal arc representation using EMTP | | A preliminary description of a new arc representation has been introduced in [1].
In which, the Modified Mayr (model) arc equations are solved in the transient analysis
control system (TACS) field of the electromagnetic transient progra |
Modeling and experimental verification of high impedance arcing fault in medium voltage networks | | A high impedance arcing fault due to a leaning tree in medium voltage (MV)
networks is modeled and experimentally verified. The fault is represented in two parts; an
arc model and a high resistance. The arc is generated by a leaning tre |
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 |
Modeling and detection of high impedance arcing fault in medium voltage networks | | n this dissertation a universal arc representation using the Electromagnetic Transient Program (EMTP) is first developed. It is accomplished based on the bilateral interaction between EMTP network and Transient Analysis Control System |
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 |
Approaches in High Impedance Fault Detection A Chronological Review | | |
Experimental investigations on multi-end fault location system based on current traveling waves | | Traveling waves recorders (TWR) are used to accurately find the location of different faults in transmission networks. These recorders are installed at few substation buses where current traveling waves can be extracted. The recorded signal |
Evaluation of probabilistic-based selectivity technique for earth fault protection in MV networks | | In a Bayesian selectivity technique has been introduced to identify the faulty feeder in compensated medium voltage (MV) networks. The proposed technique has been based on a conditional probabilistic method applied on transient features ext |
Simplified probabilistic selectivity technique for earth fault detection in unearthed MV networks | | A novel selectivity technique to identify the faulty feeder in unearthed Medium Voltage (MV) networks is introduced. The proposed technique is based on a simplified probabilistic method applied to transient features extracted from the resid |
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 |
Detection of arcing faults: Modelling, simulation, testing and algorithms aspects | | A new adaptive numerical algorithm for overhead line protection is presented in this paper. It uses an advanced fault model taking into account the arcing phenomena at the fault location and an efficient parameter estimation technique. A dy |
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 |
Bayesian selectivity technique for earth fault protection in medium-voltage networks | | In Nordic countries, distribution networks are unearthed or compensated. Earth faults, particularly in compensated networks, provide fault currents that are low compared to the load currents. Identification of the faulty feeder is therefore |
DWT and Bayesian technique for enhancing earth fault protection in MV networks | | In this paper, a Bayesian selectivity technique is introduced to identify the faulty feeder in compensated medium voltage (MV) networks. The proposed technique is based on a conditional probabilistic method applied on features extracted fro |
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 |
Comparison of universal circuit breaker arc representation with EMTP built-in model | | A preliminary description of a new arc representa-tion has been introduced in [1].
In which, the Modified Mayr (P-τ model) arc equations are solved in the Transient Analysis
Control System (TACS) field of the Electromagnetic Transient P |
Investigation of lightning arc between conductor and nearby tree under artificial rainfall | | ABSTRACT In the Nordic countries, most distribution networks are installed in forest areas.
Direct strokes to a tree can cause severe damage to nearby power lines by initiating an arc
channel through air to bare conductors. In this pape |
Evaluation of chirp detector-based travelling wave localization of earth faults in MV networks | | In this paper, a chirp detector of the current waveforms is evaluated for locating the earth faults in unearthed MV networks where it is used to precisely localize the travelling wave arrival times created by the fault occurrence. Chirp mod |
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 |
Multi-end correlation-based PD location technique for medium voltage covered-conductor lines | | ABSTRACT In Finland, overhead covered conductors (CC) are commonly used in the
medium voltage (MV) networks because the distribution loads in rural areas are not heavy
and are widely distributed in the forested terrain. Such parts of th |
Experimental Evaluation of Rogowski Coil Performance for Locating PD in Energized Overhead Covered-Conductor Feeder | | Rogowski-coil performance for partial discharge (PD) location on overhead covered-
conductor (CC) distribution lines. The measuring set-up is arranged in high voltage
laboratory. A multi-end measuring method is chosen as a technique to l |
Windowed standard deviation-based transient feature extraction for earth fault protection in MV networks | | In this paper, the windowed standard deviation (WSTD) is used to extract the initial
transients created in residual current waveforms generated due to earth faults in Medium
Voltage (MV) compensated networks. The sliding window width us |
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 |
Arcing fault identification using combined Gabor Transform-neural network for transmission lines | | Abstract This paper presents an intelligent identification scheme for transient faults in
transmission systems using Gabor Transform (GT) and Artificial Neural Network (ANN). The
successful discrimination between arcing and permanent fa |
Simplified parameter‐less fault locator using double‐end synchronized data for overhead transmission lines | | SUMMARY In this paper, a new double-end fault locator is presented for transmission lines.
The fault location is achieved using synchronized measurement data and applying the least
error squares (LSQ) principles disregarding the line pa |
Modelling and evaluation of the lightning arc between a power line and a nearby tree | | This paper addresses the modification of the existing dynamic arc model for
lightning arc simulation application. The modified dynamic arc model combines the static
and the dynamic arc equations that are already established in the liter |
Correlation Evaluation of Unsynchronized Multi-End Windows for Locating Partial Discharge Sources in Covered-Conductor Overhead Lines. | | A correlation of unsynchronized multi-end windows technique is used for locating
partial discharge (PD) source on covered-conductor (CC) overhead lines. The maximum
correlation factor between signal arrivals at two-end measuring points |
Three Measuring Points for Partial Discharge Location in Energized Covered-Conductor Overhead Distribution Lines: Algorithm and Experimental Evaluation. | | Abstract The experimental evaluation of Rogowski coil performance for locating partial
discharge (PD) in energized covered-conductor (CC) overhead lines is performed. A multi-
end measuring point is introduced, where the Rogowski coils l |
Experimental evaluation of Rogowski coil performance for locating PD in energized overhead covered-conductor feeder Author | | Abstract: An experimental analysis is performed to evaluate Rogowski coil performance for
PD (partial discharge) location on overhead CC (covered-conductor) distribution lines. The
measuring set-up is arranged in high voltage laboratory |
Modified setting of overcurrent protection for distribution feeders with distributed generation | | Connecting Distributed Generators (DGs) into conventional distribution systems
leads the protection design assumptions to become incorrect. These generators are
commonly utilized with renewable energy resources including solar photovolt |
Transient current directionality for detecting earth faults in MV networks | | |
Aspects of Phasor Angle Measurement for Wind Farm Protection Applications | | -Real time measurement of phasor angle is nowadays required in modern power
system purposes. For protection applications of large grid-integrated wind farms, in
particular, accurate estimation of current angles may be utilized for fault |
Faulty Phase Identification Using Probability Tail Function for EHV Transmission Systems | | In this paper, a novel simplified probabilistic technique is investigated to identify
the faulty phase. Estimating the faulty phase enhances the operation of single-pole
autoreclosure which is applied in Europe countries. The proposed t |
Advancing DWT-Bayesian Technique for Earth Fault Protection in MV Networks | | Bayesian selectivity technique has been introduced in [1] to identify the faulty feeder in
compensated MV networks. The proposed technique has been based on a conditional
probabilistic method applied on transient features taken out from |
Arcing fault identification using combined Gabor Transform-neural network for transmission Lines | | Arcing fault identification using combined Gabor Transform-neural network for transmission Lines |
Arcing fault identification using combined Gabor Transform- neural network for transmission Lines | | Arcing fault identification using combined Gabor Transform- neural network for transmission Lines |
Investigation of Lightning Arc between Conductor and Nearby Tree under Artificial Rainfall | | Investigation of Lightning Arc between Conductor and Nearby Tree under Artificial Rainfall |
تكاملية نظام تشخيص إستباقى حي للتفريغ الجزئي في شبكات التفريغ | تكاملية نظام تشخيص إستباقى حي للتفريغ الجزئي في شبكات التفريغ | Integration of online proactive diagnostic scheme for partial discharge in distribution networks |
اختيارية الخطأ الأرضي اللا مركزية باستخدام انحناءات مقدمة الموجة العابرة في شبكات الجهد المتوسط | اختيارية الخطأ الأرضي اللا مركزية باستخدام انحناءات مقدمة الموجة العابرة في شبكات الجهد المتوسط | Decentralized earth fault selectivity using transient front slopes for unearthed MV networks |
تحديد هوية الخطأ ذي القوس الكهربي باستخدام محول جابور –شبكة عصبية لخطوط النقل | | |
التحقق في القوس الكهربي الناتج عن الصواعق الكهربية الواقعة على شجرة مجاورة لموصل في هواء مشبع | | |
تقنية ارتباط متعدد النهاية لتحديد مكان التفريغ الجزيء لخطوط الجهد المتوسط ذو الموصلات المغطاة | | |
اختيارية عابرة لتعزيز الإدارة المستقلة للعطل بشبكات التوزيع المرتبطة مع مولدات موزعة قائمة على مولد حثي مزدوج التغذية | | Transient selectivity for enhancing autonomous fault management in unearthed distribution networks with DFIG-based distributed generation |
Autonomous Control Strategy for fault management in distribution networks | | |
تحكم عاكس كهربي معدل لمولد موزع لتحسين تنسيق متتمات الحماية في شبكات التوزيع | | Modified Inverter Control of Distributed Generation for Enhanced Relaying Coordination in Distribution Networks |
خواريزم قائم على قياسات متزامنة لتحليل عطل خط نقل قصير | | Synchronized Measurements – Based Algorithm for Short Transmission Line Fault Analysis |