document

Online Condition Monitoring Methodology for Power Electronics Package Reliability Assessment

Martin, H.A. (author), Smits, Edsger C.P. (author), Poelma, René H. (author), van Driel, W.D. (author), Zhang, Kouchi (author)

This article introduces an online condition monitoring strategy that utilizes a transient heat pulse to detect package thermal performance degradation. The metric employed is the temperature-dependent transient thermal impedance "Zth(t, Tamb)."The proposed methodology offers quantitative insights into package thermal performance degradation...

journal article 2024

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Pressure transient analysis to investigate a coupled fracture corridor and a fault damage zone causing an early thermal breakthrough in the North Alpine Foreland Basin

M Fadel, M. (author), Meneses Rioseco, Ernesto (author), Bruna, P.B.R. (author), Moeck, Inga (author)

The heterogeneity of the Upper Jurassic carbonate reservoir (Malm reservoir) beneath the North Alpine Foreland Basin has a significant influence on the mass and heat flow processes during geothermal exploitation. Geophysical borehole data revealed that sub-seismic scale fractures and karstified fractures occur at the inflow zones of deep...

journal article 2023

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A Level Shifter With Almost Full Immunity to Positive dv/dt for Buck Converters

Yang, Y. (author), Huang, Mo (author), Du, S. (author), Martins, Rui P. (author), Lu, Yan (author)

High-frequency buck converters need a fast transition of switching nodes (high dv/dt). Such high dv/dt, especially the positive one, can cause malfunction of a conventional pulse-triggered active-coupled (PTAC) level shifter that is used to control the high-side NMOS switch. In this work, we first discuss the dv/dt immunity of conventional PTAC...

journal article 2023

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Enhanced Simulation of Guided Waves and Damage Localization in Composite Strips Using the Multiresolution Finite Wavelet Domain Method

Dimitriou, Dimitris (author), Nastos Konstantopoulos, C. (author), Saravanos, Dimitris (author)

A multiresolution finite wavelet domain method, that utilizes Daubechies wavelet and scaling functions for the hierarchical approximation of state variables, is presented. The multiresolution approximation yields a hierarchical set of equations of motion involving the coarse component of generalized displacements, while additional equations...

conference paper 2023

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Two Cascaded Spin Wave Majority Gates Operation Under Continuous and Pulse Modes

Mahmoud, A.N.N. (author), Ciubotaru, Florin (author), Vanderveken, Frederic (author), Adelmann, Christoph (author), Cotofana, S.D. (author), Hamdioui, S. (author)

Spin Waves (SWs), by their nature, are excited by means of voltage driven or current driven cells under two modes: Continuous Mode Operation (CMO), and Pulse Mode Operation (PMO). Moreover, the low throughput of the SW technology (caused by its high latency) can be enhanced by wavepipelining which is supported inherently by the SW under the...

journal article 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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Transient Stable Corrective Control Using Neural Lyapunov Learning

Bellizio, Federica (author), Cremer, Jochen (author), Strbac, Goran (author)

This paper proposes a method to compute corrective control actions for dynamic security in real-time and quantifies the economic value of corrective control. Lowered inertia requires fast control methods in real-time to correct system operation and maintain system security when equipment fails. However, using corrective control beyond such...

journal article 2022

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The TRV Improvement of Fast Circuit Breakers Using Solid-State Series Superconducting Reactor

Heidary, Amir (author), Yazdani-Asrami, Mohammad (author), Hesami, Morteza (author), Sood, Vijay (author)

Utilizing superconducting technology in fault current limiters for power grid applications is a practical solution to achieve a more modern and efficient power system. This is due to their low-loss profile, high efficiency, and ability to transmit about 5x more power in the same footprint compared to conventional counterparts. In addition,...

journal article 2022

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Stability and Accuracy Analysis of a Distributed Digital Real-Time Co-simulation Infrastructure

Barbierato, L. (author), Pons, Enrico (author), Mazza, Andrea (author), Bompard, Ettore (author), Subramaniam Rajkumar, Vetrivel (author), Palensky, P. (author), Macii, Enrico (author), Bottaccioli, Lorenzo (author), Patti, Edoardo (author)

Cosimulation techniques are gaining popularity amongst the power system research community to analyze future scalable smart grid solutions. However, complications such as multiple communication protocols, uncertainty in latencies are holding up the widespread usage of these techniques for the power system analysis. These issues are even...

journal article 2022

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Filtered Split-Path Nonlinear Integrator: A Hybrid Controller for Transient Performance Improvement

Sharif, B. (author), van der Maas, A. (author), van de Wouw, N. (author), Heemels, W. P.M.H. (author)

The filtered split-path nonlinear integrator (F-SPANI) is a generic nonlinear controller designed to improve the transient performance of linear (motion) systems in terms of overshoot. The main idea underlying F-SPANI is that the amplitude and phase of an integrator can be tuned using independent filters, resulting in more efficient use of...

journal article 2022

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Analysis of the Molten Salt Fast Reactor using reduced-order models

Alsayyari, F.S. (author), Tiberga, M. (author), Perko, Z. (author), Kloosterman, J.L. (author), Lathouwers, D. (author)

In this paper, we present a reduced-order modeling approach to study the Molten Salt Fast Reactor (MSFR). Our approach is nonintrusive and based on the proper orthogonal decomposition method. We include adaptivity in selecting the sampling points both in time and parameter space. Steady-state and transient analysis were both performed using...

journal article 2021

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Modeling, Experimental Validation, and Application of VARC HVDC Circuit Breakers

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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A comprehensive model for transient behavior of tapping mode atomic force microscope

Keyvani Janbahan, A. (author), Tamer, M.S. (author), van Wingerden, J.W. (author), Goosen, J.F.L. (author), van Keulen, A. (author)

Many investigations have focused on steady-state nonlinear dynamics of cantilevers in tapping mode atomic force microscopy (TM-AFM). However, a transient dynamic model—which is essential for a model-based control design—is still missing. In this paper, we derive a mathematical model which covers both the transient and steady-state behavior....

journal article 2019

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Dual-Band Reduced-Order Model of an HVDC Link Embedded into a Power Network for EMT Studies

Ruiz, Carlos (author), Medina, Edgar (author), Ramirez, Abner (author), Mehrizi-Sani, Ali (author), de Jesus Chavez, Jose (author), Davoudi, Ali (author), Abdel-rahman, Mohamed (author)

This paper presents an approach to obtain reduced-order models for power networks involving power electronic converters (PEC) via the frequency-domain balanced realizations (FDBR) technique. PECs play an essential role in power processing and energy conversion in modern electrical networks, such as the interconnection of renewable generators,...

journal article 2019

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A State-Space Approach to Modelling DC Distribution Systems

van der Blij, N.H. (author), Ramirez Elizondo, L.M. (author), Spaan, M.T.J. (author), Bauer, P. (author)

Many modelling methods for the analysis of dc distribution grids only consider monopolar configurations and do not allow for mutual couplings to be taken into account. The modelling method presented in this paper aims to deal with both of these issues. A state-space approach was chosen for its flexibility and computational speed. The derived...

journal article 2018

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Wavelet transform modulus maxima and holder exponents combined with transient detection for the differentiation of pitting corrosion using electrochemical noise

Homborg, A.M. (author), Oonincx, P.J. (author), Mol, J.M.C. (author)

A potentially powerful tool to detect and classify corrosion mechanisms is the analysis of electrochemical noise (EN). Data analysis in the time-frequency domain using, e.g., continuous wavelet transform (CWT) allows the extraction of localized frequency information, providing information on the type of corrosion, i.e., uniform or localized...

journal article 2018

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Countermeasures of Zero-missing Phenomenon in (E)HV Cable Systems

Khalilnezhad, H. (author), Popov, M. (author), van der Sluis, L. (author), Bos, Jorrit A. (author), de Jong, Jan P.W. (author), Ametani, Akihiro (author)

Zero-missing is a phenomenon in shunt compensated cable systems in which the current through the line breaker does not cross the zero point for several cycles. This paper deals with a thorough investigation on countermeasures of the zero-missing phenomenon in transmission systems and determines the requirements, benefits, and risks of...

journal article 2018

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Dynamic Equivalent Based on Balanced Realizations for Interconnection of Photovoltaic Distributed System

Orozco, Michael (author), de Jesus Chavez, Jose (author), Popov, M. (author), Garcia-Vite, Pedro M. (author)

This paper presents a hybrid methodology to analyze electromagnetic transients in a photovoltaic distributed system. The methodology consists in split the system into two parts: The external zone, where the system is reduced by a dynamic equivalent obtained by the application of Balance Realization (BR) theory and the internal zone, where the...

conference paper 2018

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Electrochemical Noise: A Clear Corrosion Signature

Homborg, A.M. (author)

The interpretation of electrochemical noise (EN) data has long been under discussion. Throughout the years, many data analysis techniques have been proposed for this purpose. As a starting point, procedures and parameters that enable identification of, or discrimination between, general and localized corrosion processes through EN are critically...

doctoral thesis 2014

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Modeling of parasitic elements in high voltage multiplier modules

Wang, J. (author)

It is an inevitable trend that the power conversion module will have higher switching frequency and smaller volume in the future. Bandgap devices, such as SiC and GaN devices, accelerate the process. With this process, the parasitic elements in the module will probably have stronger influence on circuit operations than before. In this thesis,...

doctoral thesis 2014