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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

document

Cosimulating Integrated Energy Systems with Heterogeneous Digital Twins: Matching a Connected World

Palensky, P. (author), Mancarella, Pierluigi (author), Hardy, Trevor (author), Cvetkovic, M. (author)

Energy system integration promises in-creased resiliency and the unlocking of synergies, while also contributing to our goal of decarbonization. It is enabled by both old and new technologies, glued together with data and digital services. Hydrolyzers, heat pumps, distributed renewable generation, smart buildings, and the digital grid edge...

journal article 2024

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Comparative assessment of generative models for transformer- and consumer-level load profiles generation

Xia, W. (author), Huang, Hanyue (author), Duque, Edgar Mauricio Salazar (author), Shengren, H. (author), Palensky, P. (author), Vergara Barrios, P.P. (author)

Residential load profiles (RLPs) play an increasingly important role in the optimal operation and planning of distribution systems, particularly with the rising integration of low-carbon energy resources such as PV systems, electric vehicles, small-scale batteries, etc. Despite the prevalence of various data-driven models for generating...

journal article 2024

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Hierarchical online energy management for residential microgrids with Hybrid hydrogen–electricity Storage System

Wu, J. (author), Li, S. (author), Fu, A. (author), Cvetkovic, M. (author), Palensky, P. (author), Vasquez, Juan C. (author), Guerrero, Josep M. (author)

The increasing proportion of renewable energy introduces both long-term and short-term uncertainty to power systems, which restricts the implementation of energy management systems (EMSs) with high dependency on accurate prediction techniques. A hierarchical online EMS (HEMS) is proposed in this paper to economically operate the Hybrid...

journal article 2024

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Risk-constrained bidding and offering strategy for sector-coupled electricity-hydrogen systems incorporating accessibility level of mobility sector

Zare Oskouei, Morteza (author), Mehrjerdi, Hasan (author), Palensky, P. (author)

To enhance the economic viability of integrated energy systems, it is important to balance risk and reward while ensuring operational flexibility and compliance with regulatory constraints. Developing an integrated risk measurement method for energy trading in energy markets that complies with regulatory constraints adds another layer of...

journal article 2024

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Will SiOx-pinholes for SiOx/poly-Si passivating contact enhance the passivation quality?

Yang, G. (author), Gram, Remon (author), Procel Moya, P.A. (author), Han, C. (author), Yao, Z. (author), Singh, M. (author), Zhao, Y. (author), Mazzarella, L. (author), Zeman, M. (author), Isabella, O. (author)

Passivating contacts based on poly-Si have enabled record-high c-Si solar cell efficiencies due to their excellent surface passivation quality and carrier selectivity. The eventual existence of pinholes within the ultra-thin SiOx layer is one of the key factors for carrier collection, beside the tunneling mechanism. However, pinholes are usually...

journal article 2023

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Dynamic operation of water electrolyzers: A review for applications in photovoltaic systems integration

Martinez Lopez, V.A. (author), Ziar, H. (author), Haverkort, J.W. (author), Zeman, M. (author), Isabella, O. (author)

This review provides a comprehensive overview of the dynamics of low-temperature water electrolyzers and their influence on coupling the three major technologies, alkaline, Proton Exchange Membrane (PEM) and, Anion Exchange Membrane (AEM) with photovoltaic (PV) systems. Hydrogen technology is experiencing considerable interest as a way to...

review 2023

document

Voltage Stability improvement based on firing angle control of SVCs in wind integrated system with ANN

Mishra, Rajan Kumar (author), Panda, Ramprasad (author), Panda, Nanda Kishor (author)

The widening gap between energy generation and demand on a global scale, coupled with the imperative to reduce emissions, has necessitated the development of largescale sustainable energy solutions. Among the various renewable energy options, Wind Power stands out as a viable source capable of generating substantial amounts of electricity....

conference paper 2023

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A stochastic MPC framework for the control of pumping stations in polder systems with regard for uncertainty in inflow and hourly electricity prices

van der Heijden, T.J.T. (author), van de Giesen, N.C. (author), Palensky, P. (author), Abraham, E. (author)

The Netherlands is a low-lying country situated in the Rhine-Meuse delta. A significant portion of the Netherlands is located below sea level, making the proper management of local and national waterways essential. Polders are used to manage groundwater levels, drain excess rainwater, and store water during times of drought. These polders often...

conference paper 2023

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Opportunities of digitalization

Winiwarter, Wilfried (author), Palensky, P. (author)

book chapter 2023

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Crystalline silicon solar cells with thin poly-SiO_x carrier-selective passivating contacts for perovskite/c-Si tandem applications

Singh, M. (author), Amarnath, A. (author), Wagner, Fabian (author), Zhao, Y. (author), Yang, G. (author), Mazzarella, L. (author), Weeber, A.W. (author), Zeman, M. (author), Isabella, O. (author)

Single junction crystalline silicon (c-Si) solar cells are reaching their practical efficiency limit whereas perovskite/c-Si tandem solar cells have achieved efficiencies above the theoretical limit of single junction c-Si solar cells. Next to low-thermal budget silicon heterojunction architecture, high-thermal budget carrier-selective...

journal article 2023

document

A GNN-Based Generative Model for Generating Synthetic Cyber-Physical Power System Topology

Liu, Y. (author), Xie, H. (author), Presekal, A. (author), Stefanov, Alexandru (author), Palensky, P. (author)

Synthetic networks aim at generating realistic projections of real-world networks while concealing the actual system information. This paper proposes a scalable and effective approach based on graph neural networks (GNN) to generate synthetic topologies of Cyber-Physical power Systems (CPS) with realistic network feature distribution. In order...

journal article 2023

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Voltage/Current Doubler Converter for Electric Vehicle Wireless Charging Employing Bipolar Pads

Grazian, F. (author), Soeiro, Thiago B. (author), Bauer, P. (author)

Light-duty electric vehicles (EVs) typically have a rated voltage of either 400 or 800 V. Especially when considering public parking infrastructures or owners with multiple EVs, e.g., car rental companies, EV wireless chargers must efficiently deliver electric power to both battery options. For this purpose, this article proposes an advanced...

journal article 2023

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Charging Infrastructure and Grid Integration for Electromobility

Rivera, Sebastian (author), Goetz, Stefan M. (author), Kouro, Samir (author), Lehn, Peter W. (author), Pathmanathan, Mehanathan (author), Bauer, P. (author), Mastromauro, Rosa Anna (author)

Electric vehicle (EV) charging infrastructure will play a critical role in decarbonization during the next decades, energizing a large share of the transportation sector. This will further increase the enabling role of power electronics converters as an energy transition technology in the widespread adoption of clean energy sources and their...

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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Stable passivation of cut edges in encapsulated n-type silicon solar cells using Nafion polymer

Chen, N. (author), Tune, Daniel (author), Buchholz, Florian (author), Roescu, Razvan (author), Zeman, M. (author), Isabella, O. (author), Mihailetchi, Valentin D. (author)

In this study, the edge passivation effectiveness and long-term stability of Nafion polymer in n-type interdigitated back contact (IBC) solar cells are investigated. For new module technologies such as half-cut, triple-cut, or shingled modules, cutting of the cells introduces unpassivated edges with a high recombination rate and this limits the...

journal article 2023

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Strategies for realizing high-efficiency silicon heterojunction solar cells

Zhao, Y. (author), Procel Moya, P.A. (author), Han, C. (author), Cao, L. (author), Yang, G. (author), Özkol, E. (author), Alcañiz, Alba (author), Kovačević, K. (author), Limodio, G. (author), Santbergen, R. (author), Smets, A.H.M. (author), Weeber, A.W. (author), Zeman, M. (author), Mazzarella, L. (author), Isabella, O. (author)

Silicon heterojunction (SHJ) solar cells have achieved a record efficiency of 26.81% in a front/back-contacted (FBC) configuration. Moreover, thanks to their advantageous high V_OC and good infrared response, SHJ solar cells can be further combined with wide bandgap perovskite cells forming tandem devices to enable efficiencies well...

journal article 2023

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Comprehensive Study on Transformer Fault Detection via Frequency Response Analysis

Kakolaki, Seyed Ebrahim Hosseini (author), Hakimian, Vahid (author), Sadeh, Javad (author), Rakhshani, E. (author)

The sudden outage of a transformer due to a fault can cause irreparable damage to the electricity industry. Hence, by conducting momentarily inspections of the transformer's condition, faults can be promptly detected, and the transformer can be disconnected from the power grid to prevent subsequent failures in this equipment. Detecting faults...

journal article 2023

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Hybrid Analytical Model for AC Copper Loss Computation of Hairpin Winding

Du, Yunlu (author), Huang, Yunkai (author), Guo, Baocheng (author), Peng, Fei (author), Yao, Y. (author), Dong, J. (author)

This article proposes a hybrid analytical model (HAM) for predicting ac copper losses in hairpin windings. The HAM combines the nonlinear semi-analytical model (SAM) and the 1-D ac copper loss computation model to solve the inaccurate boundary solutions of the 1-D ac copper loss computation model when magnetic saturation occurs in the stator...

journal article 2023

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Generating quality datasets for real-time security assessment: Balancing historically relevant and rare feasible operating conditions

Bugaje, A.-.A.B. (author), Cremer, Jochen (author), Strbac, Goran (author)

This paper presents a novel, unified approach for generating high-quality datasets for training machine-learned models for real-time security assessment in power systems. Synthetic data generation methods that extrapolate beyond historical data can be inefficient in generating feasible and rare operating conditions (OCs). The proposed...

journal article 2023