Volume 22, Issue 3 (JIAEEE Vol.22 No.3 2025)                   Journal of Iranian Association of Electrical and Electronics Engineers 2025, 22(3): 0-0 | Back to browse issues page

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Aghazadeh S, Yazdaninejadi A. Side Effect of Two-Level Fault Current on Satisfying Fault Ride Through Requirement of Distributed Generations by the Protection Systems. Journal of Iranian Association of Electrical and Electronics Engineers 2025; 22 (3)
URL: http://jiaeee.com/article-1-1720-en.html
Side Effect of Two-Level Fault Current on Satisfying Fault Ride Through Requirement of Distributed Generations by the Protection Systems
Sina Aghazadeh , Amin Yazdaninejadi *
Shahid Rajaee Teacher Training University
Abstract:   (19 Views)
This article explores the impact of two-level fault currents on efficiency of the existing protection systems in meeting fault ride-through (FRT) of inverter-based distributed generations (IBDGs) in active distribution networks. At the outset, to illustrate the issue, a conceptual framework is presented based on the FRT curve of the source and the characteristic curve of protection relays. Mathematical analysis reveals that two-level fault currents may result in increased voltage drops within IBDG-connected busses. Consequently, the performance of voltage relays with IBDG FRT characteristics could compromise the reliable operation of these sources, potentially leading to unexpected disconnections from the network and jeopardizing power supply stability. To provide a thorough investigation, simulation studies utilizing PowerFactory 15.1 software on an active distribution network with IBDG sources will be conducted. Two scenarios with different FRT requirements are defined, focusing particularly on a relay near the source affected by two-level fault currents. The study aims to showcase how elevated voltage drops caused by two-level fault currents can impede the successful achievement of IBDG fault ride-through, emphasizing the critical importance of addressing these challenges in power system protection strategies.
 
Keywords: Two-level fault current, fault ride through, inverter-based distributed generation sources, renewable energy sources, active distribution networks, protection systems.
     
Type of Article: Research | Subject: Power
Received: 2024/05/14 | Accepted: 2024/08/1
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