Access to EMTP user presentations, webinars, and slide deck presentations.
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2 presentations for Photovoltaic Systems:

Author(s): Lorena Otalora Garcia, Samantha Munoz
Type:Technical Presentation
Downloaded: 0
Date: 2024-07-29
Dynamic EMT Models Homologation - Usage and Projection898
Abstract
Since 2022, the National Electric Coordinator in Chile has requested standardization of the dynamic models of the power plants or parks connected to the National Electrical System (SEN). As a company ... see more(EEMT), we have participated in the development of dynamic models for various wind and photovoltaic parks, carrying out a series of EMT homologations, both for equivalent and complete models. This involves analyzing their operation and validating them through records. Once this process is completed, it is possible to conduct tests and systemic verifications on the model, performing different short circuits and analyzing the LVRT. Thanks to the development and homologations of these models, in their complete and equivalent stages, different analyses can be carried out where electromagnetic phenomena exist for complete models, while with the equivalent models analyses can be carried out in a delimited area, generating faults and comparing them with real cases that have occurred. Within the framework of this conference, EEMT wants to present what the development of the homologation of these models has meant, the results that have been obtained in their different stages, and the usage that can be given to them for the performance of different analyses. On the other hand, as a consulting firm, we have been developing our own model of the Chilean National Electrical System based on various studies and based on the experience we have acquired as a leading consulting in EMT models. With the progress of homologations and the development of EMT models, it is expected that in the future there will be a systemic Database of the SEN that contains a greater number of aggregated models and that reliably allows for a large scale systemic analysis, such as, failures in the 500 kV transmission line, among other phenomena.
Tag(s): Wind Power Photovoltaic Systems, EMT Homologations, Chilean National Electrical System

Author(s): Eduardo Finck
Type:Technical Presentation
Downloaded: 0
Date: 2024-07-26
Distributed Energy Resources Large-scale Integration Impacts on the Distribution System Protection902
Abstract
This presentation examines the impact of high DER penetration, particularly PV systems, on EPDS protection reliability. Instead of concentrating DERs in specific nodes, they are distributed along an u... see morenbalanced feeder with single-phase and three-phase PV systems. Various fault types, including impedance faults, were analyzed using the IEEE 34-node test feeder in EMTP-RV. Three scenarios were considered: (i) without DERs, (ii) 50% DER penetration with protection set by rated load, and (iii) 50% DER penetration with protection set by conductor capacity. Results showed reduced feeder relay currents for three-phase and phase-to-phase faults and significant decreases for phase-to-ground faults with impedance, leading to relay blindness and delayed protection operation. These insights support utilities in adapting EPDS protection systems for DER integration.
Tag(s): Distributed Energy Resources, Photovoltaic Systems, Protection System Coordination, Fault Detection