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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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Boricic, Aleksandar (author), Rueda, José L. (author), Popov, M. (author)The number of Distributed Energy Resources (DER) and dynamic loads is increasing rapidly in modern power systems. Their aggregated effects on power grid dynamics are, however, still insufficiently explored. It is expected that distribution-transmission interactions will be more pronounced in the future, resulting in a stronger need to analyse...journal article 2021
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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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Mirhosseini, S.S. (author), Jamali, Sadegh (author), Popov, M. (author)This paper presents a non‐unit protection method for long transmission lines of multi‐terminal HVDC (MTDC) grids based on the magnitude and direction of modal voltage and current travelling waves. The method overcomes the difficulty resulting from high attenuation and distortion as reported in previous methods using fault‐generated transients...journal article 2021
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Bakhshi-Jafarabadi, Reza (author), Popov, M. (author)This paper proposes a new hybrid islanding detection method for grid-connected photovoltaic system (GCPVS)-based microgrid. In the presented technique, the suspicious islanding event is initially recognized whilst the absolute deviation of the point of common coupling (PCC) voltage surpasses a threshold. After an intentional delay, a transient...journal article 2021
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Aires, M. N.O. (author), Medeiros, R. P. (author), Costa, F. B. (author), Silva, K. M. (author), Chavez, J. J. (author), Popov, M. (author)This paper proposes a restricted earth fault protection based on the wavelet transform (REFW) for detecting ground faults close to the transformer neutral point (turn-to-ground faults) and supporting the conventional phase differential protection, which presents limitations in this kind of faults. The proposed REFW protection uses only high...journal article 2021
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Bakhshi-Jafarabadi, Reza (author), Sadeh, Javad (author), Rakhshani, E. (author), Popov, M. (author)Islanding is a condition when distributed generators (DGs) are disconnected electrically from the upstream network. This unwanted situation should be detected effectively to ensure the safety of the maintenance staffs and power quality (PQ) requirements. This paper presents a new high PQ maximum power point tracking (MPPT)-based methodology for...journal article 2021
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Boricic, Aleksandar (author), Rueda, José L. (author), Popov, M. (author)The possibility to monitor and evaluate power system stability in real-time is in growing demand. Whilst most stability-related studies focus on long-term voltage stability and frequency stability, very little attention is given to the issue of short-term (voltage) instability. In this paper, the most common evaluation methods present in the...journal article 2021
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Zirka, S.E. (author), Moroz, Y.I. (author), Zhuykov, A.V. (author), Matveev, D.A. (author), Kubatkin, M.A. (author), Frolov, M.V. (author), Popov, M. (author)It is commonly recognized that correct transformer model (particularly topological one) is a key element for any ferroresonance simulations. This paper represents a line of reasoning by which a reliable model of a voltage transformer (VT) can be constructed given substantial uncertainties in its parameters and characteristics. Starting with...journal article 2021
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Wen, Weijie (author), Li, Pengyu (author), Cao, Hong (author), Liu, Haijin (author), Wang, Xingguo (author), Lv, Hui (author), Li, Bin (author), Popov, M. (author)Due to the progressive penetration and usage of renewable sources and loads based on power electronics, medium voltage direct current (MVDC) distribution system is getting broad attention. Direct current circuit breakers (DCCBs) are of vital importance for the reliability and flexibility of power system. With features of low cost and micro...journal article 2020
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Bakhshi-Jafarabadi, Reza (author), Sadeh, Javad (author), Popov, M. (author)This paper proposes a novel islanding detection method (IDM) for grid-connected photovoltaic systems (GCPVSs) through a disturbance injection in the maximum power point tracking (MPPT) algorithm. When an absolute deviation of the output voltage exceeds a threshold, the applied disturbance shifts system operating point from its maximum power...journal article 2020
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Tyuryukanov, I. (author), Popov, M. (author)The D-decomposition method allows to design control structures with prescribed locations of closed loop poles. Unlike the root locus method, D-decomposition natively handles two variable regulator parameters, which makes it suitable for more complex control structures. Moreover, an extension to more than two variable parameters is...conference paper 2020
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Liu, S. (author), Shetgaonkar, Ajay (author), Popov, M. (author)The objective of this paper is to investigate the coordinative performance of different types of high voltage DC (HVDC) circuit breakers (CBs) in multi-terminal DC (MTDC) grids. Several different HVDC CB technologies are emerging as a solution for the protection of offshore MTDC grids. There is a need for coordinative operation between different...conference paper 2020
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Boricic, Aleksandar (author), Rueda, José L. (author), Popov, M. (author)Renewable energy sources (RES) penetrate power grids at all voltage levels. A large number of RES units are connected to medium-voltage (MV) and low-voltage (LV) levels resulting in a significant share of overall generation. Therefore, the dynamic behavior of such distribution grids should be thoroughly examined. The goal of this paper is to...conference paper 2020
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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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Tyuryukanov, I. (author), Popov, M. (author), van der Meijden, M.A.M.M. (author), Terzija, Vladimir (author)Identifying generator coherency with respect to slow oscillatory modes has numerous power system use cases including dynamic model reduction, dynamic security analysis, or system integrity protection schemes (e.g., power system islanding). Despite their popularity in both research and industry, classic eigenvector-based slow coherency techniques...journal article 2020
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Liu, Lian (author), Liu, Zhou (author), Popov, M. (author), Palensky, P. (author), van der Meijden, M.A.M.M. (author)HVDC technologies are widely acknowledged as one of solutions for the interconnection of renewable energy resources with the main electric power grid. The application of the latest modular multi-level converter (MMC) makes power conversion much more efficient. Due to the relatively low impedance in a DC system, DC fault currents may rise to an...journal article 2020
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Liu, S. (author), Popov, M. (author), Mirhosseini, S.S. (author), Nee, Simon (author), Modeer, Tomas (author), Ängquist, Lennart (author), Belda, Nadew (author), Koreman, Kees (author), van der Meijden, M.A.M.M. (author)This paper deals with the modeling, hardware results and model validation by measurements of a VSC assisted resonant current (VARC) dc circuit breaker (CB) and the application within a future network by simulation. The newly emerging VARC dc CB can be used as a solution for the protection of offshore multi-terminal HVDC (MTDC) grids. In this...journal article 2020
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Bakhshi-Jafarabadi, Reza (author), de Jesus Chavez, Jose (author), Sadeh, Javad (author), Popov, M. (author)This article proposes a fast and reliable two-level islanding detection method (IDM) for grid-connected photovoltaic system (GCPVS)-based microgrid. In the first level of the proposed IDM, the magnitude of the rate of change of output voltage (ROCOV) is computed. If this variable exceeds a predefined threshold, a disturbance is injected into...journal article 2020