EMTP Portland Video
Impact of Wind & Solar Generation on Negative Sequence and Power Swing Protection
Speaker: Evangelos Farantatos, Electric Power Research Institute (EPRI)
This presentation first investigates the impact of wind generation on the performance of negative-sequence-based protection. In many applications, wind generators are designed to suppress negative sequence current partially or entirely. Negative sequence current suppression control may result in the misoperation of protection schemes whose operation relies on the assumption of negative sequence quantities being present in substantial levels during unbalanced faulted conditions. [ Learn more...]
Safe Operation of DFIG based Wind Parks in Series Compensated Systems
Speaker: Ulas Karaagac, Hong Kong Polytechnic University
This presentation will demonstrate the impact of WP operating conditions and DFIG control system parameters on SSCI. Guidelines will be also presented for modifying the DFIG control system parameters to ensure safe operation and acceptable transient responses due to faults. In addition, the accuracies of various analytical tools used for SSCI problem identification will be discussed. [ Learn more...]
The new frequency dependent line and cable model: Wideband Model
Speaker: Ilhan Kocar, Polytechnique Montréal
The new WB model encapsulates many improvements including state-of-the-art research results. It eliminates the modeling problems encountered with the existing universal line model (ULM) approach. In the new model, there is no limitation on the number of conductors. For symmetric coaxial cable systems with several cables, numerical problems are avoided by using the new cable correction function. The newly added DC correction scheme together with frequency band partitioning ensures high precision both at low frequencies and high frequencies. [ Learn more...]
Geomagnetic Disturbance Simulation Studies: Recent Developments and Challenges
Speaker: Aboutaleb Haddadi, Polytechnique Montréal & Afshin Rezaei-Zarei, York University
This presentation studies how to perform a GMD study in EMTP in compliance with the NERC requirements. Required modeling details and data have been identified using a GMD simulation case study in EMTP. EMTP enables such studies by accurately modeling nonlinearities and representing the system at a very high precision level in a wideband range of frequencies. [ Learn more...]
Modeling and analysis of large DC grids with EMTP – new CIGRE benchmark with mixed VSC / LCC technologies
Speaker: Sébastien DENNETIERE, RTE – Centre National d’Expertise Réseaux
he main purpose of the test system is to provide a common basis for all CIGRE SC B4 WGs that work on the research of DC grids. This benchmark model generated a high interest. Some limitations on this benchmark (topology, equipment included…) have been identified so far. In order to provide common study platforms to meet the most different HVDC grid study purposes and needs, seven HVDC grid test models have been established by the B4-72 CIGRE WG. These models have been designed to cover most HVDC grid applications including collection, integration and transmissions of onshore/offshore renewable power generation over long distance, LCC-HVDC grids, LCC-VSC hybrid HVDC grids, AC system interconnections for different types of studies with appropriate and applicable sizes. The presentation will address the issues related to the modeling of the largest DC grid test system proposed by this WG. This grid model includes 22 VSC converter stations, 4 LCC converter stations, PV and wind generations. [ Learn more...]
