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18 Results for the search "Protection":

Author: h.gras
Type: Model
Downloaded: 79 times
Date: 2017-09-26
Rating: * 1 vote(s)
8/10


LVRT OVRT function


Description:
This device is an OVRT LVRT protection device.
The user enters the curves points.
It is assumed that the curve is horizontal between two points.

Tag(s): LVRT, OVRT, ride, through, FRT, undervoltage, overvoltage
Author: n.sene
Type: Publication
Downloaded: 369 times
Date: 2015-04-02
Rating: * 2 vote(s)
3/10


Indirect Lightning Performance of a Real Distribution Network with focus on Transformer Protection


Description:
The paper applies the Monte Carlo procedure proposed by the Authors to evaluate the indirect lightning performance of a real medium-voltage distribution network, which includes feeders and laterals, p... see more

Tag(s): induced voltages; distribution networks; Monte Car lo method; lightning protection; MTBF.
Author: n.sene
Type: Publication
Downloaded: 369 times
Date: 2015-04-02
Rating: * 1 vote(s)
5/10


Selection of MV/LV Transformers to be Protected by Surge Arresters against Indirect Lightning Overvoltages


Description:
The papers addresses the problem of locating surge protective devices in a medium voltage distribution network by means of an accurate computer model for the calculation of lightning induced overvolta... see more

Tag(s): distribution network; surge arresters; lightning protection.
Author: n.sene
Type: Publication
Downloaded: 380 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


On the Mitigation Effect of Surge Arresters on the Lightning Performance of Overhead Distribution Lines


Description:
For the accurate statistical assessment of the lightning performance of distribution lines one needs to
take into account the presence of protection devices such as surge arresters and shielding ... see more

Tag(s): Lightning statistics, induced overvoltages, lightning performance of distribution lines, surge arresters, shielding wires groundings, Monte Carlo method.
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


AN ADVANCED INTERFACE BETWEEN THE LIOV CODE AND THE EMTP-RV


Description:
Accurate evaluation of the response of overhead distribution lines to lightning electromagnetic pulse (LEMP) represents an important aspects in insulation coordination of distribution network. The imp... see more

Tag(s): LIOV, EMTP-RV, LEMP
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 2 vote(s)
5/10


Correlation of lightning events and faults in distribution power networks


Description:
The paper deals with the analysis of the possible correlation between cloud-to-ground lightning discharges and relay operations inferred by using the experimental data obtained means of a measurement ... see more

Tag(s): Lightning protection, lightning-to-fault correlation, lightning location systems, lightning performance of distribution lines, induced overvoltages, a-periodic voltage transient measurement, EMTP.
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


VOLTAGE TRANSIENTS IN A DISTRIBUTION NETWORK CORRELATED WITH EVENTS IDENTIFIED BY A LIGHTNING LOCATION SYSTEM


Description:
Monitoring units for the measurement of high frequency voltage transients have been in operation at three different busses of an Italian medium voltage (MV) distribution feeder, mainly composed by ove... see more

Tag(s): Lightning, distribution network, LIOV, EMTP
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


Lightning-Induced Overvoltages Transferred Through Distribution Power Transformers


Description:
This paper deals with the calculation of lightning induced overvoltages on medium-voltage (MV) and low-voltage (LV) distribution networks taking into account the presence of MV–LV distribution trans... see more

Tag(s): Lightning, distribution transformers, overvolatges
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


Interaction Between Grounding Systems and Nearby Lightning for the Calculation of Overvoltages in Overhead Distribution Lines


Description:
The aim of the paper is to analyze overvoltages in overhead distribution lines induced by nearby lightning return stroke currents taking into account also the conductive coupling between the lightning... see more

Tag(s): lightning induced overvoltages, grounding systems, overhead distribution lines, lightning protection.
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


Protection Systems Against Lightning-Originated Overvoltages in Resonant Grounded Power Distribution Systems


Description:
A joint research project between AES Sul, the Federal University of Itajubá and the University of Bologna aims at defining the required protections against lightning-originated overvoltages in a reso... see more

Tag(s): Lightning protection, power distribution networks, induced overvoltages.
Author: n.sene
Type: Publication
Downloaded: 378 times
Date: 2015-04-01
Rating: * 0 vote(s)
0/10


Assessment of the Lightning Performance of Compact Overhead Distribution Lines


Description:
The assessment of the lightning performance of a compact configuration of MV overhead lines that is expected to be adopted in the near future by an electricity distribution company in a Brazilian regi... see more

Tag(s): Lightning protection, Overhead distribution lines, Induced overvoltages, Electromagnetic transients.
Author: gerinlajoie.luc
Type: Library
Downloaded: 374 times
Date: 2012-11-23
Rating: * 2 vote(s)
6/10


A collection of PowerRelay devices


Description:
A collection of PowerRelay devices
Distance relay 21,
Synchronizing or synchronism-check device 25,
Instantaneous overcurrent 50 + Ac time overcurrent relay 51,
Frequency relay (ov... see more

Tag(s): Protection
Author: AdminEMTP-RV
Type: Model
Downloaded: 207 times
Date: 2012-06-18
Rating: * 0 vote(s)
0/10


Ferro_hyst_Zno


Description:
Simple ferroresonance case. In this case the switching of a part of the network comprised of a cable connected to a no-load transformer is carried out. A pole of the breaker fails to open and an impor... see more

Tag(s): Protection
Author: AdminEMTP-RV
Type:
Downloaded: 301 times
Date: 2012-06-18
Rating: * 1 vote(s)
10/10


Cross_Bonded_Cable


Description:
Insulation coordination - 225 kV cross bonded cable - protection of the sheath.
In the configuration a 225 kV cross-bonded cable is connected at both ends to an otherhead line. The sheath is prot... see more

Tag(s):
Author: AdminEMTP-RV
Type: Model
Downloaded: 251 times
Date: 2012-06-18
Rating: * 1 vote(s)
8/10


CB_arc_CM


Description:
This is an interesting case of the study of arc-circuit interaction in case of the interruption of a short-line fault.The arc is represented by a composite Cassie-Mayr model and the line is represente... see more

Tag(s): Example, Protection
Author: AdminEMTP-RV
Type:
Downloaded: 180 times
Date: 2012-06-18
Rating: * 0 vote(s)
0/10


Motor_Protection


Description:
The following circuit presents a protection scheme for an induction motor due to voltage dips.

The voltage dip generator is presented in a masked subcircuit where it is possible to control ... see more

Tag(s): Motor, Protection
Author: AdminEMTP-RV
Type: Model
Downloaded: 103 times
Date: 2012-06-18
Rating: * 0 vote(s)
0/10


Protection_Homopolaire_Evol


Description:
This case introduces a typical zero sequence relay tested in a MV network.

This is a contribution of Marc Petit from Supelec in France.

See the comments in the file.

Tag(s): Protection, Components
Author: AdminEMTP-RV
Type: Model
Downloaded: 157 times
Date: 2012-06-18
Rating: * 0 vote(s)
0/10


SW_tContr


Description:
This design introduces a contolled-closing switch very appropriate for asymetrical current or transient voltage studies during shunt-reactor/capacitor bank switching or fault creation.

This... see more

Tag(s): Protection