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overcurrent relay in simulink


 

New SIMULINK libraries for modeling digital protective relays and evaluating their performance under fault transients
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M Kezunovic, B Kasztenny , Conference on Power System Transients-IPST, 1999 ,ipst.org  blocks of the Relay Elements library and the general SIMULINK librar- ies. Some of the relay models emulate actual relays to the extent possible using the publicly available design details. Figs.8, 9 and 10 present an example of a three-phase overcurrent relay featuring three   

Evaluation of DSP based Numerical Relay for Overcurrent Protection
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YL Goh, AK Ramasamy, FH Nagi ,Int. J. of Syst. App., , 2011  DSP, TMS320F2812 Simulink model of overcurrent relay Target for TI C2000 Embedded IDE link Third-party development tools  400 Page 6. TABLE II. OPERATION TIME OF THE OVERCURRENT RELAY FROM MATLAB/SIMULINK SIMULATION AND EXECUTION ON DSP   

Test and evaluation time-inverse over-current protection algorithm using Simulink
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D Campos, E Moreno, D Torres, WB Mikhael , and Computers in , 2008 Page 1. Test and Evaluation Time-Inverse Over-Current Protection Algorithm Using SIMULINK DAVID CAMPOS  network. Two parameters are needed to setup an overcurrent relay: 1) the pick-up (tripping) current, and 2) time delay. The   

MODELING OF A NOVEL FUZZY BASED OVERCURRENT RELAY USING SIMULINK®
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MA Rahman, M Kazi Main Uddin Ahmed, R Sakib ,etc3.com.vn Abstract—In modern protection system the key challenge is the trade-off between the security demand (no false tripping), the speed of operations and the dependability requirements. To meet this challenge properly, the application of a novel Artificial   

Numerical relay for overcurrent protection using TMS320F2812
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Y GOH, AK Ramasamy, FH Nagi ,Proceedings of the 9th , 2010  3 Proposed Overcurrent Relay Model The proposed overcurrent relay is modeled in MATLAB/Simulink before implemented on TMS320F2812 as shown in Fig.1. The overcurrent relay of IDMT type is adopted in the proposed model.  Simulink model of overcurrent relay   

Development of a Digital Motor Universal Management Relay Simulator
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M Khederzadeh, H Ansari-Sharezai ,confbank.um.ac.ir  Fig. 3 Motor Universal Management Relay in Simulink The basic blocks (protective devices) have been developed as masked subsystems with s-functions performing the required operations.  9, conventional overload (overcurrent relay used for Page 7.   

Influence of Distributed Generation on Protection Schemes of Medium Voltage Grids
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 B. Modeling overcurrent protection Both definite-time and inverse-time overcurrent relay with a directional unit are model in Simulink. For simplicity, the saturation in current and voltage transformers is ignored. The signals that   

Studies on grid impacts of distributed generation in a combined real-time simulation environment
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K Mäki, A Kulmala, S Repo, P Järventausta ,7th International Conference , 2007 ,ipst.org  Where no suitable models are available, Matlab/Simulink environment provides well-known tool for modeling these components.  Feeders are equipped with one overcurrent relay and dedicated earth-fault relay located at the substation.   

Enabling future meshed operation for distribution networks
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NKC NAIR, N BOWE  Protection of distribution transformers is generally either by fuses or overcurrent relay.  Page 4. Page 4 of 14 Modelling of typical 11kV distribution circuits in Simulink shows that for a 300mm cable the charging current is less than 1.5 A/km.   

Directional relay co-ordination in ungrounded medium voltage radial distribution networks using a Real-Time Digital Simulator
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A van der Meer ,2008 ,repository.tudelft.nl  The simulation results are verified by modelling the same net- work in Simulink as well.  Furthermore, three particular cases are studied: a fault at which the directional relay reacts first, a fault at which the overcurrent relay reacts first and a fault at which no relay reacts at all.   

DISTANCE DIGITAL RELAY MODEL DEVELOPED IN ATP FOREIGN MODEL AND C+
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FJM Mucha ,Journal of Electrical Engineering, 2006 ,iris.elf.stuba.sk  The third option is a model of the power system cre- ated in Matlab/SimPower Systems, and the relay model is developed in Matlab/Simulink.  The multifunctional relay includes a non-directional overcurrent relay with double set-stage tripping charac- teristic as shown in Fig.   

Voltage Sag Effects on the Process Continuity of a Refinery with Induction Motors Loads
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MA El-Gammal, AY Abou-Ghazala ,American Journal of ,domacj.com  Figure (3). Simulink model for the test circuit  This may explain why the IM may trip (by the overcurrent relay) on a voltage drop to 75% lasting for 1.5 sec in case of pre-sag voltage equals 1.05 pu, while the same IM may survive the same voltage sag in case of pre-sag voltage   

The influence of Distributed Generation on Protection Schemes in Medium Voltage Networks
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NHV Phuong ,repository.tudelft.nl  The case study network with DG connected is modeled in Matlab/Simulink.  2.5 Modeling DGs in Matlab/Simulink..5 2.5.1 Matlab/Simulink overview ..5   

Editorial Advisory Panel
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 tuning of speed and position control systems, specifically for drives.5 First principles modelling is used to derive a Simulink model; this  To reach this goal, the most suitable protection devices are specified among a time overcurrent relay, a directional time overcurrent relay, a   

Modeling of a Radial Distribution Feeder with TCC-based Protective Devices
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J Li, KL Butler-Purry, C Benner ,Proceedings of 2003 North , 2003 ,psalserver.tamu.edu  a model of a radial distribution feeder with protective devices based on IEEE 34 node test feeder [13] by using SIMULINK and SimPowerSystems  E. Coordination between fuses and CBs The coordination between a fuse and a CB (overcurrent relay) is somewhat similar to the   

Effects of Voltage Sags on Induction Motors
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MA ELGAMMAL, AY ABOU-GHAZALA ,2009 ,ie.utcluj.ro  247 Fig. 3. Simulink model for the test circuit. Table I. Motor Parameters.  As the criterion used to trip the motor is the inverse current-time characteristics, and as the voltage decreases, the motor tries to supply the load by drawing higher current, triggering the overcurrent relay.   

Effects of Voltage Sags on a Refinery with Induction Motors Loads
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MA EL GAMMAL, AY Abou-Ghazala ,IRANIAN JOURNAL OF , 2010  69 Fig. 3 Simulink model of the test circuit.  This may explain why the IM may trip (by the overcurrent relay) on a voltage drop to 75% in case of pre-sag voltage equals 1.05 pu, while the same IM may survive the same voltage sag in case of pre-sag voltage equals 0.95 pu [10].   

Real-Time Rapid Embedded Power System Control Prototyping Simulation Test-Bed Using LabVIEW and RTDS
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K Butler-Purry, HM Chou ,2011 ,cdn.intechweb.org  loop. The implementation of an overcurrent relay protection scheme is discussed in this chapter to illustrate the operation of the test bed. A  RTDS. The overcurrent relay is implemented on the RT processor and FPGA. Measurements   

A distributed hands-on course on intelligent electrical systems
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 In the laboratory session, first principals modelling is used to derive a Simulink model; this model is validated by comparing measurements  To reach this goal, the most suitable protection devices are specified among a time overcurrent relay (7SJ61-Siemens), a directional time 



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