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Author: AdminEMTP-RV
Type: Document
Downloaded: 464 times
Date: 2012-06-18

Presentation of an approach based on EMTP for the calculation of lightning induced overvoltages

Description:
Authors:
A. Xémard, P. Baraton, B. Bressac, N. Qako, J. Mahseredjian, G. Simard, J. Ribeiro, R. Tarafi, A. Zeddam.

Abstract:
LIPS (Lightning Impact on Power Systems) is a toolbo... see morex based on EMTP (DCG version) and devoted to the calculation of the failure rate of apparatus due to lightning. This software covers direct and induced lightning. It has been developed in a partnership project between France Telecom, Hydro-Québec and électricité de France. The induced lightning nearby the electrical system. It is based on the following computational steps:
1) For each overhead line and underground cable of the electrical system, two equivalent current sources are calculated in the frequency domain, representing the illumination of the conductors by external electrical field due to lightning. These sources are evaluated in the frequency domain, taking into account the variation of the parameters of lines and cables with frequency. The conductivity of the ground is taken as finite. The modal theory is applied in the case of multi-conductor cable or line.
2) The equivalent sources are converted into time-domain and then included in an EMTP representation of the system allowing a time-domain transient computation. this approach and follow by comparisons between induced overvoltages calculated by LIPS and results from the literature.

Tag(s):

Author: AdminEMTP-RV
Type: Model
Downloaded: 141 times
Date: 2012-06-18

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: 307 times
Date: 2012-06-18

Pwm_inv_3ph

Description:
This case shows a three-phase full-bridge DC/AC inverter with PWM switching.

Reference: Power Electronics, Mohan, Undeland, Robbins - Ed Wiley - Chapter 8.

Tag(s): Power Electronics

Author: AdminEMTP-RV
Type: Model
Downloaded: 352 times
Date: 2012-06-18

Reactor

Description:
This is an advanced case of a three-phase shunt-rector modeling along with a Cassie-Mayr Modified circuit-breaker arc model.

This design introduces the way three-phase shunt-reactor may be ... see moresimulated in EMTP-RV. Moreover, it introduces an advanced circuit-breaker arc model known as Cassie-Mayr Modified or Advonin arc model.

Tag(s): Example

Author: AdminEMTP-RV
Type:
Downloaded: 184 times
Date: 2012-06-18

Self_Exc_ind

Description:
Simulation case of the self-excitation of induction motors during startup on a series compensated radial line.

This case reproduces the results published in the book of Anderson and Farmer ... see moreentitled 'Series Compensation of Power Systems', PBLSH publisher, 1996.

Although approximate data are used, results compare surprisingly well with the figures in chapter 7.

Tag(s): Motor