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Failure anticipation scheme in distribution systems based on wave distortions and Montecarlo methods

Bhandia, R. (author), de Jesus Chavez, Jose (author), Cvetkovic, M. (author), Garcia-Vite, Pedro M. (author), Popov, M. (author), Palensky, P. (author)

Anticipating failures is vital for maintaining a reliable power supply. Advanced measurement devices in the grid generate vast data that contains valuable information on grid operations. Initial signatures of an incipient failure are often reflected in this data in the form of electrical waveform distortions. Conventional protection schemes are...

review 2024

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Series magnetic coupled reactor saturation considerations for high voltage AC and DC power systems

Heidary, Amir (author), Ghaffarian Niasar, M. (author), Popov, M. (author)

The rapid increase of integrated distributed generators results in higher fault currents in the future modern grids. A remedy for the concern is employing series reactors as fault current limiters. This paper elaborates on a ferromagnetic core series reactor, which, when saturated, adversely affects the operation of the series reactor during...

journal article 2024

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Non-unit protection method for MMC-HVDC grids based on selective drop rate of voltage traveling waves

Dehghan Marvasti, F. (author), Mirzaei, Ahmad (author), Savaghebi, Mehdi (author), Lekić, A. (author), Popov, M. (author)

Fast, sensitive, and selective protection principles are one of the major challenges in the feasibility of modular multi-terminal (MMC) high voltage direct current (HVDC) grids. Rate of change of voltage (ROCOV) and transient-based solutions are the traditional and widely accepted protection principles. Despite the speed and practicality of...

journal article 2024

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Magnetic core effects on the high-frequency behavior of transformers

Nasirpour, F. (author), Ghaffarian Niasar, M. (author), Popov, M. (author)

This paper investigates the high-frequency transformer losses attributed to eddy currents in both conductors and the core. A comprehensive model of a transformer winding is presented, meticulously incorporating skin and proximity effects. The winding resistance increase due to these effects is determined by applying analytical and finite element...

journal article 2024

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The principle of magnetic flux switch

Heidary, Amir (author), Ghaffarian Niasar, M. (author), Popov, M. (author)

This paper introduces an innovative Magnetic Switch (MFS) designed to control and alter magnetic flux within energy system components, offering an alternative to conventional power electronic devices. The MFS comprises a low-current control coil, a control core, and a high-density magnetic flux-carrying main core combined with a main coil energy...

journal article 2024

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Enhanced Real-Time Multi-Terminal HVDC Power System Benchmark Models with Performance Evaluation Strategies

Shetgaonkar, A.D. (author), Karmokar, T.R. (author), Popov, M. (author), Lekić, A. (author)

Real-time simulations have become a crucial tool for life cycle studies of VSC-based HVDC systems. This paper introduces real-time Multi-Terminal HVDC (MTDC) power [1] system network models with real-time wind pro le feedback. It addresses the shortcomings of existing benchmark network models and lls the modeling gaps. ® RSCAD/RTDS...

journal article 2024

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Single-ended DC Fault Location Method For MMC-Based HVDC Power System Using Adaptive Multi-step Levenberg-Marquardt Algorithm

Liu, L. (author), Xie, F. (author), Popov, M. (author), Hao, Zhiguo (author), Lekić, A. (author)

This article presents an accurate DC fault location method that applies parameter fitting. This technique first discusses the traveling wave (TW) propagation process in the decoupled line-mode network. We obtain the exact fault distance equation based on the analytical expressions for the wavefront of backward line-mode voltage TW. The adaptive...

conference paper 2023

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Beyond SCR in Weak Grids: Analytical Evaluation of Voltage Stability and Excess System Strength

Boricic, Aleksandar (author), Rueda, José L. (author), Popov, M. (author)

Due to the continuous increase (decrease) in the number of inverter-based (synchronous) generators in modern electrical power systems, the theoretical foundations behind widely used system strength and voltage stability assessment methods require thorough revision. The existing evaluation methods such as the Short-Circuit Ratio (SCR) are often...

conference paper 2023

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Non-Unit DC Line Protection Method for Multi-Terminal MMC-HVDC System Based on Normalized Backward Traveling Waves

Xie, F. (author), Liu, L. (author), Hao, Zhiguo (author), Lekić, A. (author), Popov, M. (author)

Existing line protection methods for multi-terminal direct current (MTDC) systems are constrained by the placement and values of boundary elements. To overcome this limitation, this paper proposes a non-unit DC line protection method based on the normalized backward traveling waves (BTWs) of the 1-mode voltage. Firstly, this article studies...

conference paper 2023

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Controlled Power System Separation Using Generator PMU Data and System Kinetic Energy

Tyuryukanov, I. (author), Bos, Jorrit A. (author), Meijden, Mart A.M.M.van der (author), Terzija, Vladimir (author), Popov, M. (author)

With the growing number of severe system disturbances and blackouts around the world, controlled system separation is becoming an increasingly important system integrity protection scheme (SIPS) to save the electric power system from a complete or partial disintegration. A successful controlled splitting approach should at least tackle the...

journal article 2023

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Post DC Fault Circulating Current Suppression Control

Kamat Tarcar, R. (author), Shetgaonkar, A.D. (author), Popov, M. (author), van der Meijden, M.A.M.M. (author), Winter, Wilhelm (author), Ndreko, M. (author), Dimitrovski, R. (author), Burkhardt, Matthias (author), Lekić, A. (author)

The radial topology of the Multi-terminal High Voltage Direct Current (MTDC) power system is a preferred connection for the gigawatt- renewable power due to its scalability and reliability. However, a radial topology with a metallic return bipolar converter configuration MTDC network possesses technical challenges regarding DC fault current...

conference paper 2023

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PMU-Based Backup Protection in the Presence of Inverter-Based Resources

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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Quantifying frequency containment reserve using cross-entropy frequency-constrained contingency-state-analysis model

Yuan, Yiping (author), Liu, Zhou (author), Chen, Zhe (author), Hoej Jensen, Kim (author), Popov, M. (author)

With the increasing penetration of converter-interfaced generators, the frequency containment reserve (FCR) from conventional generators keeps going down, leading to a potential risk of frequency instability under contingencies. Consequently, Converter-interfaced generators are required to provide FCR and participate in the corrective...

journal article 2023

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High-frequency transformer winding model with adequate protection

Nasirpour, F. (author), Heidary, Amir (author), Ghaffarian Niasar, M. (author), Lekić, A. (author), Popov, M. (author)

High local electric field intensity in transformer windings originating from transient signals is one of the reasons for transformer failures. Due to the integration of renewable energy sources into the power grids and the increased number of transients, the likelihood of transformer catastrophic failure increases accordingly. Therefore, to...

journal article 2023

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Zero-sequence current suppression control for fault current damper based on model predictive control

Shetgaonkar, A.D. (author), Popov, M. (author), Palensky, P. (author), Lekić, A. (author)

In a multi-terminal direct current (MTdc) system based on a modular multilevel converter (MMC), high-speed and large interruption capability direct current circuit breakers (dc CBs) are required for dc fault interruption. However, commercializing these breakers is challenging, especially offshore, due to the large footprint of the surge...

journal article 2023

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Transformer Resonance: Reasons, Modeling Approaches, Solutions

Heidary, Amir (author), Ghaffarian Niasar, M. (author), Popov, M. (author), Lekić, A. (author)

Due to the extension of the power grid with many complex and compact pieces of power equipment, transformers will be more exposed to fast transient, resulting from various resonance conditions. Transformer resonance can result in severe overvoltage on internal parts of the winding, leading to insulation failure and, consequently, transformer...

journal article 2023

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Novel busbar protection scheme for impedance-earthed distribution networks

Jankovski, Milan (author), Popov, M. (author), Godefrooi, Joey (author), Parabirsing, Evita (author), Wierenga, Ernst (author), Lekić, A. (author)

Due to the vast number of substations at the distribution level and increased costs of differential busbar protection, DSOs are in search of cost-effective protection schemes for busbar protection. This includes the use of various communication-based protection schemes, such as the reverse-blocking schemes used at Stedin. However, due to...

journal article 2023

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Dynamic Incremental Learning for real-time disturbance event classification

Veerakumar, Nidarshan (author), Cremer, Jochen (author), Popov, M. (author)

With recent telemetric advancements, the real-time availability of power grid measurements has opened challenging opportunities for the design of advanced protection and control schemes. Artificial neural networks (ANN) are promising approaches for detecting and classifying disturbance events from measurement data. Numerous offline ANN-based...

journal article 2023

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A Control Method for Converter-interfaced Sources to Improve Operation of Directional Protection Elements

Yang, Zhe (author), Liu, Zhou (author), Zhang, Qi (author), Chen, Zhe (author), de Jesus Chavez, Jose (author), Popov, M. (author)

The traditional fault control strategy of converter-interfaced renewable energy sources (CIRESs) may bring about a lower sensitivity level or misoperation of fault component-based directional elements. To overcome this problem, a new control scheme is proposed to adjust sequence impedance angles of CIRESs by computing suitable current...

journal article 2023

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Model predictive control and protection of MMC-based MTDC power systems

Shetgaonkar, A.D. (author), Liu, L. (author), Lekić, A. (author), Popov, M. (author), Palensky, P. (author)

Meshed offshore grids (MOGs) present a viable option for a reliable bulk power transmission topology. The station-level control of MOGs requires faster dynamics along with multiple objective functions, which is realized by the model predictive control (MPC). This paper provides control, and protection design for the Modular Multilevel...

journal article 2023