Access to EMTP user presentations, webinars, and slide deck presentations.
10 presentations for measurements:
Author(s): Bruno Juriši? - KONCAR
Type:Technical Presentation
Date: 2021-06-16
Abstract
In this paper, three wideband transformer models are presented: black-box, grey-box and white-box. These models are validated using the transmitted overvoltage measurements at high voltage laboratory.... see more Then, the results of the simulation of the transient event recorded in 220/110 kV substation is presented and compared to the on site measurements results.
Author(s): Aramis Schwanka Trevisan, Enercon
Type:Technical Presentation
Date: 2020-12-11
Abstract
<p>This presentation provides an overview of recently proposed generic EMTP wind turbine models, which have been validated against field measurements, and a benchmark study system for th... see moree assessment of low-frequency interactions involving wind farms in radial series-compensated grids. Based on these models, detailed EMTP results are presented and modal analysis is applied to help explaining some of the identified issues and provide mitigation. Finally, a recently proposed Abstract : Recently, field events involving adverse interaction between grid-connected inverters and the existing power infrastructure have been reported. Hence, the ever increasing integration of such devices is yielding the need for detailed EMT-Type models to better understand such phenomena, as well as reliable screening methodologies for the efficient identification of potentially critical scenarios during new interconnection processes. This work provides an overview of recently proposed generic EMTP wind turbine models, which have been validated against field measurements, and a benchmark study system for the assessment of low-frequency interactions (sub-synchronous control interaction) involving wind farms in radial series-compensated grids. Based on these models, detailed EMTP results are presented and modal analysis is applied to help explaining some of the identified issues and provide mitigation. Finally, a recently proposed methodology aiming at the efficient identification of critical scenarios, namely, the DQ-Scanning technique, is outlined and its effectiveness demonstrated by its application to the aforementioned systems. Author: Aramis Schwanka Trevisan</p>
Author(s): Ilhan Koçar
Type:Technical Presentation
Date: 2020-12-11
Abstract
<p>This presentation is on the simulation of switching overvoltages on transmission lines with trapped charge, validation of EMTP line models, modeling of prestrike in statistical simula... see moretion studies and discussion of necessary simulation practices by means of validations with field tests.</p>
<p>Objectives: - Identify simulation practices to produce the field measurements en EMT simulation - Validation of line models - frequency dependence - Discussion on modeling approaches, simulation practices, sensitivity to electrical parameters - Evaluate maximum overvoltages - How to perform statistical simulations, model prestrike and include corona in statistical simulations efficiently.</p>
Author(s): Ilhan Kocar, Polytechnique Montréal
Type:Technical Presentation
Date: 2020-11-20
Abstract
<h2 class="title">EMTP USA User Conference 2019 </h2> <p class="tagline"><b>The validation of field measured... see more switching overvoltages, inclusion of statistical prestrike and corona modeling</b></p> <p id="text-intro">This presentation is on the simulation of switching overvoltages on transmission lines with trapped charge, validation of EMTP line models, modeling of prestrike in statistical simulation studies and discussion of necessary simulation practices by means of validations with field tests. On transmission lines where switching surges are not mitigated with closing resistors and/or surge arresters, high-speed reclosing on a line with trapped charge will produce high overvoltages that have been measured above 3 pu. Careful simulations of these switching events using available Electromagnetic Transient (EMT) programs consistently produce significantly higher voltages than the measurements. It is demonstrated that the transient voltage waveforms can be reproduced very well using frequency-dependent line models, but the magnitude of the maximum overvoltage is significantly overestimated unless the effect of corona is considered. In principle, once a line model is validated, it is possible to proceed with statistical simulation phase to identify the worst-case overvoltage, which is of utmost importance for transmission line and substation related issues such as the evaluation of minimum approach distance and clearance practices. However, before proceeding with statistical simulation phase, it is also necessary to tune the prestrike model in EMTP. In this presentation, we also discuss how to benefit from field tests to fine tune the generic prestrike model in EMTP and then how to proceed with statistical simulation studies while taking corona into account in an efficient manner.</p>
Author(s): Christopher Burnette, ABB
Type:Technical Presentation
Date: 2020-11-20
Abstract
<h2 class="title">EMTP USA User Conference 2019 </h2> <p class="tagline"><b>A Project to Correct Mill Power ... see moreFactor</b></p> <p id="text-intro">Selecting the proper size capacitor bank for power factor correction at a pulp mill with an existing capacitor bank in service requires many hours of computer modeling and system simulations. This paper discusses the calculations involved in specifying the capacitor bank and evaluates the system response to transient switching events involving the two capacitor banks. Finally, the paper provides a comparison of the results of the calculations with field measurements recorded during the commissioning of the new capacitor bank.
![[R&D]_EMTP : Recherche et développement](https://www.emtp.com/system/files/imagecache/presentation/slide1_1.jpg "[R&D]_EMTP : Recherche et développement")
![[Protection_Devices]_Étude des courants coupés par les sectionneurs de changemen](https://www.emtp.com/system/files/imagecache/presentation/TechnicalPresentation1.jpg "[Protection_Devices]_Étude des courants coupés par les sectionneurs de changemen")
