Searched for: author%3A%22Azizi%2C+Sadegh%22
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Jegarluei, Mohammad Rezaei (author), Dobakhshari, Ahmad Salehi (author), Popov, M. (author), Terzija, Vladimir (author), Azizi, Sadegh (author)
Increasing penetration of inverter-based resources (IBRs) undermines the performance of conventional protection systems since IBRs’ fault characteristics are fundamentally different from those of synchronous generators. In this paper, a PMU-based backup protection method is proposed for power transmission systems with high penetrations of IBRs....
conference paper 2023
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de Jesus Chavez, Jose (author), Veerakumar, Nidarshan (author), Popov, M. (author), Palensky, P. (author), Azizi, Sadegh (author), Melgoza, Enrique (author), Terzija, Vladimir (author)
Fault currents may result in cascading failures and even system collapse if not detected and cleared on time. To account for the possibility of failure of primary protection under stressed system conditions, an extra layer of protection is commonly employed, referred to as backup protection. This paper introduces an effective formulation for...
conference paper 2022
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de Jesus Chavez, Jose (author), Popov, M. (author), López, David (author), Azizi, Sadegh (author), Terzija, Vladimir (author)
This paper presents a new fault detection algorithm based on the Fast Discrete Stockwell Transform. The algorithm can improve the functionality of existing distance protection and resolve shortcomings identified during the fault detection process in case of fault occurrence in systems with a high penetration of power electronics-based generators...
journal article 2021
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Chavez, Jose J. (author), Veerakumar, Nidarshan (author), Azizi, Sadegh (author), Guardado, Jose L. (author), Rueda, José L. (author), Palensky, P. (author), Terzija, Vladimir (author), Popov, M. (author)
Local protection elements such as fuses and relays are the first protective mechanism to clear the fault and isolate the affected part of the power grid. Although the selectivity, speed, and sensitivity of these primary protection devices are relatively high, they cannot be considered flawless. There is a small percentage of events for which...
journal article 2021
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Sun, Mingyu (author), Liu, Gaoyuan (author), Popov, M. (author), Terzija, Vladimir (author), Azizi, Sadegh (author)
The conventional Under Frequency Load Shedding (UFLS) scheme could result in unacceptably low frequency nadirs or overshedding in power systems with volatile inertia. This paper proposes a novel UFLS scheme for modern power systems whose inertia may vary in a wide range due to high penetration of renewable energy sources (RESs). The proposed...
journal article 2021
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Popov, M. (author), de Jesus Chavez, Jose (author), Martinez Carrasco, Eduardo (author), Villén Martínez, Maria Teresa (author), Borroy Vicente, Samuel (author), López Cortón, David (author), Azizi, Sadegh (author), Terzija, Vladimir (author)
This paper deals with a comprehensive analysis to test the performance of available distance protection, that can be used in transmission networks with high penetration of converter-based distribution generation. For this, a new benchmark model has been developed according to the European Network of Transmission System Operators (ENTSO-e)...
conference paper 2020
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Azizi, Sadegh (author), Sun, Mingyu (author), Liu, Gaoyuan (author), Popov, M. (author), Terzija, Vladimir (author)
Short-circuit faults close to either end of a transmission line, are normally cleared instantaneously by the distance relay at that end and after hundreds of milliseconds, i.e., in Zone 2 operating time, by the relay at the opposite end of the line. This sequential tripping can be accelerated on condition that a reliable communication link is...
journal article 2019
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Azizi, Sadegh (author), Sun, Mingyu (author), Terzija, Vladimir (author), Popov, M. (author)
Short-circuit faults occurring close to either end of a transmission line are normally cleared with some time delay by the distance relay at the opposite end of that line. The pilot relaying schemes require communication media in order to reduce this time delay. This paper presents a noncommunication method that provides high-speed distance...
conference paper 2019
Searched for: author%3A%22Azizi%2C+Sadegh%22
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