Juan C. Vasquez

Juan C. Vasquez
Aalborg University · Department of Energy Technology

PhD, Professor in Energy Internet and Microgrids

About

474
Publications
216,061
Reads
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26,203
Citations
Introduction
I received the B.S. degree in Electronics Engineering from UAM, Colombia in 2004. In 2009, I have received my Ph.D. degree from the Technical University of Catalonia, Barcelona, Spain in 2009 at the Department of Automatic Control Systems from UPC, Barcelona - Spain, where I worked as a Post-doc. Currently, I am an Assistant Professor in Aalborg University, Denmark. My research interests include modeling, power management applied to the Distributed Generation in Microgrids. Internet of things.
Additional affiliations
April 2015 - present
Aalborg University
Position
  • Associate Professor in Microgrids
January 2014 - March 2015
Aalborg University
Position
  • Postdoctoral Researcher DFF
June 2011 - December 2013
Aalborg University
Position
  • Research Assistant

Publications

Publications (474)
Article
DC microgrids are becoming integral part of a modern power system due to the growing penetration of DC distributed energy resources and loads, with additional advantages in terms of power quality improvement. They can be used for remote area electrification including villages, mountains, and islands. In this paper, an islanded DC microgrid is consi...
Article
This paper presents a novel approach of employing hierarchical control to optimize the operation of islanded AC microgrids. The proposed method is an offline, centralized, power-flow-based energy management scheme which includes primary and secondary control dynamics in a modified power-flow formulation. The inner power-flow level maintains bus vol...
Article
Full-text available
The environmental concerns and reduction in fossil fuels have become a major concern due to which a large number of electric and hybrid vehicles are being built to minimize the contribution of greenhouse gas emissions from the transportation sector and to increase the efficiency of the overall vehicles. Electric vehicles (EVs) play an important rol...
Article
Decarbonization, Digitalization and Decentralization are the three key pillars to meet the significant rise of energy demand with the rapid development of urbanization, which enable the global low-carbon economy with transactive energy market. The total energy consumption of buildings and transport accounts for more than 70% in global final energy...
Article
Generally speaking, a phase-locked loop (PLL) is a feedback circuit/algorithm that constantly adjusts its output to match in phase and frequency with a reference signal. In power/energy applications , the base for developing the vast majority of available PLLs is the synchronous reference frame PLL (SRF-PLL) that is known to have a limited ability...
Article
With the increased installation of voltage source converters (VSCs) into the power grid, concerns about resonance/stability issues associated with interactions among converters , and between them and the AC grid is growing. The prevailing method for investigating these issues is the impedance modeling of VSCs, which involves linearizing all their c...
Article
Primitive grid synchronization systems of power converters were based on a zero-crossing detection (ZCD) algorithm, which is an open-loop synchronization (OLS) system. A ZCD algorithm, however, could cause some stability problems for power converters. Therefore, they were gradually replaced by some closed-loop synchronization systems. Recently, in...
Article
A SOGI is a resonant regulator with a pair of complex-conjugate poles, and therefore, with infinite magnitude at its center frequency. Thanks to this property, one can put together a set of m SOGIs in an elegant way and decompose a single-phase signal into its constituent frequency components and detect their amplitude and phase angle. Such a confi...
Article
Full-text available
The introduction of low-power wide-area networks (LPWANs) has changed the image of smart systems, due to their wide coverage and low-power characteristics. This category of communication technologies is the perfect candidate to be integrated into smart inverter control architectures for remote microgrid (MG) applications. LoRaWAN is one of the lead...
Preprint
Seaports are well known as the medium that has evolved into the central link between sea and land for complex marine activities. The growth in maritime logistics especially necessitates a large volume of energy supply to maintain the operation of sea trade, resulting in an imbalance between the generation and demand sides. Future projections for th...
Preprint
Full-text available
Microgrid is one of the promising green transition technologies that will provide enormous benefit to the seaport, as a solution to the major concerns in this sector, namely energy crisis, economical and environmental pollution. However, finest design of the microgrid is a challenging task considering different objectives, constraints and uncertain...
Preprint
Full-text available
Islanded microgrids (IMGs) provide a promising solution for reliable and environmentally friendly energy supply to remote areas and off-grid systems. However, the operation management of IMGs is a complex task including the coordination of a variety of distributed energy resources and loads with an intermittent nature in an efficient, stable, relia...
Article
Full-text available
Islanded microgrids (IMGs) provide a promising solution for reliable and environmentally friendly energy supply to remote areas and off-grid systems. However, the operation management of IMGs is a complex task including the coordination of a variety of distributed energy resources and loads with an intermittent nature in an efficient, stable, relia...
Article
Energy Internet (EI) envisions a future energy system with sustainable concerns of efficiency, economy and environment by achieving flexibility of multi-energy-integrated physical space, digitalization of data-driven cyber space and interaction of customer-aware social space. To systemically understand how EI manages energy, data and information fl...
Article
Full-text available
Hybrid electric ships powered by diesel generators and batteries are the main configuration for shipboard microgrids (SMGs) in the current maritime industry. Extensive studies have been conducted for the hybrid operation mode, whereas the all-electric operation mode and the switching between the aforementioned two modes in a system with multiple ge...
Article
Full-text available
Several space organizations have been planning to establish a permanent, manned base on the Moon in recent years. Such an installation demands a highly reliable electrical power system (EPS) to supply life support systems and scientific equipment and operate autonomously in a fully self-sufficient manner. This paper explores various technologies av...
Article
Full-text available
In a context with an increasing number of non-traditional power sources, smart inverters function as the main interfaces between distributed energy resources (DERs) and the power bus. This role is even more prominent in microgrids (MGs), where numerous DERs must be controlled and coordinated. For this aim, MGs need to implement suitable communicati...
Preprint
Full-text available
The growing interest in space exploration demands exploring new energy resources as well as improvement of the existing sources of energy used in space environments in terms of robustness, reliability, resiliency, and efficiency. This especially applies to the photovoltaic (PV) systems that are required to work efficiently in very hostile environme...
Article
Among different factors that threaten the stability of LCL-filtered inverters in grid-tied mode, the variation of grid impedance and computational delay in digital systems are the most important ones. Often, a control system based on either the inverter- or grid-side current and a combination of impedance estimation and delay compensation methods a...
Article
Full-text available
Citation: Hussain, N.; Khayat, Y.; Golestan, S.; Nasir, M.; Vasquez, J.C.; Guerrero, J.M.; Kauhaniemi, K. AC Microgrids Protection: A Digital Coordinated Adaptive Scheme. Appl. Sci. 2021, 11, 7066. https://doi.
Article
Full-text available
The increase in greenhouse gas emissions from the transportation sector together with the continued depletion of fossil fuels in general has encouraged an increase in the use of energy storage systems and renewable energy sources at seaports and also on short route yachts and ferries. At present most seaports, particularly smaller ones, are not pro...
Article
Full-text available
In recent years, due to the large spread of power electronics converters (PECs) onboard shipboard power systems (SPSs), harmonic contamination became an inherent sproblem. Moreover, as the SPSs are mostly operating in an islanded mode with a limited rating of the generators that feed heavy variable loads, voltage stability issues became a challenge...
Article
DC microgrids (MGs) are complex systems connecting a number of renewable energy sources to different types of loads based on distributed networks. However, the strong reliance on communication networks makes DC MGs vulnerable to intentional cyber-attacks. In this paper, a distributed attack detection scheme is presented for the DC MG system by prop...
Article
Shipboard power systems (SPS) are complex systems connecting multiple power sources, energy storage systems (ESSs) and various types of loads. However, the fluctuated propulsion loads may lead to a low power quality of the system. In this paper, a power management system (PMS) is designed for SPS in the framework of an optimization-based method. Wi...
Article
With growing environmental concerns, the installation of distributed generation systems forming microgrids in power systems has received much attention recently. This panacea, however, has always some challenges with itself. The delay in digital control systems, grid impedance variations in weak grids, and the interaction between paralleled convert...
Article
DC microgrids are com-plex systems connecting various renewable energy sources to different types of loads based on distributed networks. However, the strong reliance on communication networks makes dc microgrids vulnerable to intentional cyberattacks. In this article, two typical types of observer-based approaches are presented to address the atta...
Article
With the increasing access of renewable energy resources and fast ubiquitous connection of everything, the traditional one-way power flow from centralized generation to end consumers will give way to bidirectional-way power flow with multidirectional energy network among central grids and distributed prosumers. To empower the prosumer-centric Energ...
Article
An accurate model to represent the photovoltaic modules is essential to facilitate the efficient deployment of these systems in terms of design, analysis, and monitoring considerations. In this respect, this study proposes a new approach to improve the accuracy of the widely used five-parameter single-diode model. Two new physical equations are int...
Article
Full-text available
Aiming at the problems emerging in a pulse width modulation (PWM) drive system with long cables, the accurate modeling of power cables is the premise for predicting and analyzing these relevant phenomena, and a proper filter design is the key solution to these problems. This paper proposes high-frequency cable models to represent these frequency-de...
Article
Full-text available
Addressing power quality issues in shipboard micro-grids (SMs), which are mainly attributable to the increased installation of power converters, has received much attention recently. To this end, static var compensators (SVCs), such as thyristor switched capacitors (TSCs) and fixed capacitors-thyristor controlled reactors (FCs-TCRs), can be effecti...
Preprint
In this research work, an adaptive scheme for the coordinated protection of AC Microgrids using directional overcurrent (DOCR) relays is presented. Protection of AC MGs is a complex and challenging issue due to the dynamic nature of the network including, a) its capability to reconfigure the modes of operation ranging from grid-connected to the isl...
Article
Full-text available
Cascaded multilevel converters based on medium-frequency (MF) AC-links have been proposed as alternatives to the traditional low-voltage inverter, which uses a bulky low-frequency transformer step-up voltage to medium voltage (MV) levels. In this paper, a three-phase cascaded DC-AC-AC converter with AC-link for medium-voltage applications is propos...
Preprint
Full-text available
An accurate model to represent the photovoltaic modules is essential to facilitate the efficient deployment of these systems in terms of design, analysis, and monitoring considerations. In this respect, this study proposes a new approach to improve the accuracy of the widely-used five-parameter single-diode model. Two new physical equations are int...
Article
Full-text available
In DC microgrids, constant power loads (CPLs) reduce the effective damping of the DC-DC converter and may in- duce destabilizing effects into the DC-DC converter. To overcome such problems regarding CPL and ensure large-signal stability of DC-DC converters in DC microgrids, some feedforward terms are added to V-I droop-based dual-loop controller fo...
Article
The increasing demands for reducing greenhouse emissions and improving fuel efficiency of marine transportation have presented opportunities for electric ships. Due to the complexity of multiple power resources coordination, varied propulsion loads, changeable economical, and environmental requirements, power/energy management system (PMS/EMS) beco...
Article
Google's Director of Research Peter Norvig said, "We don't have better algorithms than anyone else; we just have more data." This inspiring statement shows that having more data is directly related to better decision making and foresight about the future. With the development of Internet of Things (IoT) technology, it is now much easier to gather d...
Article
This paper presents the power flow modelling for AC/DC hybrid islanded microgrids including droop-controlled distributed generation units, secondary frequency and voltage restoration control for the AC side of the microgrid, and secondary voltage restoration control for the DC side of the microgrid. The interlink converter between the AC and DC mic...
Preprint
Aiming for the problems emerging in the PWM drive system with long cables, accurate modeling of power cables is the premise to predict and analyze the relevant phenomenon, and a proper filter design is the key solution to these problems. This paper proposes high-frequency cable models to represent the frequency-dependent characteristics, especially...
Article
Microgrids (MGs), referred to as the next-generation power systems, are receiving considerable attention from both industry and academia. Integrated with distributed energy resources (DERs), energy storage system and a variety of loads, microgrid functions as a localized power grid which can be operated independently or connected to utility grids....
Article
Under weak grid conditions and in microgrids, the gird impedance is often large and has a highly varying nature. In such a scenario, stabilizing grid-connected inverters with an LCL output filter could be a challenging task. The control delay that comes from sampling and PWM may contribute to worsen this condition. Especially, the mentioned delay c...
Article
The Energy Internet is proposed to enhance the collaborative utilization of distributed renewable energy resources; enable a flexible, customer-engaged energy transaction network; and achieve real-time balancing of supply and demand. This allows integrating advanced Internet of Things (IoT)-based architectures, information and communications techno...
Article
Full-text available
In this study, modelling, implementation, and control of a hybrid renewables‐based, scalable DC microgrid using multi‐input multi‐output dual active half‐bridge (DAHB) converter is presented. The proposed microgrid architecture exhibits superiority and enhanced functionality in comparison to the existing conventional architectures in terms of the r...
Conference Paper
Full-text available
The increase of green house gases (GHGs) emissions and depletion in fossil fuels have urged an extensive use of renewable energy resources (RESs) and energy storage systems (ESSs) in short route ferries and yachts. In current times, most of the smaller seaports are not equipped with the cold ironing facility, hence, when fossil fuel based SMGs are...
Article
Full-text available
This work proposes a power-sharing control method based on the Linear Quadratic Regulator with optimal reference tracking (LQR-ORT) for three-phase inverter-based generators using LCL filters islanded mode. Compared to single-input single-output (SISO) controllers, the LQR-ORT controller increases robustness margins and reduces the quadratic value...
Article
Full-text available
Keeping the synchronization of a grid feeding converter (GFC) with a weak grid during deep voltage sags has been introduced as a serious challenge in converter-interfaced renewable energy sources dominated weak grids. To deal with this challenge, a simple yet effective solution based on the virtual inertia concept is proposed in this paper. This me...
Article
Full-text available
Solar photovoltaic (PV) direct current (DC) microgrids have gained significant popularity during the last decade for low cost and sustainable rural electrification. Various system architectures have been practically deployed, however, their assessment concerning system sizing, losses, and operational efficiency is not readily available in the liter...
Conference Paper
Full-text available
In recent years, the significant revolution of shipboard micro-grids (SMs) towards all-electric ships offered several advantages such as high efficiency, better maneuverability, and controllability. However, the application of power electronics onboard SMs, particularly for DC and hybrid ships leads to serious power quality issues. The application...
Article
Full-text available
Stable operation of grid-connected converters with the LCL filter is essential. Variations of the grid impedance and consequently, variations of the resonance frequency, can push the system toward instability. Also, delay that comes from sampling and PWM, could worsen the stability condition. Thus, the control system should be designed by consideri...
Article
Nonlinear dynamical systems such as weakly coupled oscillators are an interesting approach to be adopted for the regulation of power inverters inside microgrids. Aiming at the synchronization and load sharing in islanded mirogrid, this paper is inspired by oscillator synchronization property to propose a Hopf oscillator controller for the single-ph...
Article
This study brings forward a design method of virtual resistance for droop-controlled dc microgrids (DCMGs). Although droop control is widely employed in coordinated DCMGs to coordinate different energy sources, few works address thoroughly the principles for a proper virtual resistance design. In this paper, dynamic stability and static voltage dev...
Article
Full-text available
The proportional power sharing is essential to guarantee reliability on the operation of an islanded microgrid. However, inaccurate reactive power sharing in scenarios with line impedance mismatches, and slow transient response remains important limitations of most of the conventional power sharing controllers. In this work, a novel method for powe...
Article
Full-text available
The electric power systems (EPSs) are of a paramount importance in satellites. These systems are responsible for power generation, storage, delivery, and conditioning. A failure in an EPS may hinder all the aforementioned functionalities, which consequently, leads to a failure of the whole space mission. There are many technologies available in bot...
Article
Full-text available
Non-intrusive load monitoring (NILM) enables to understand the appliance-level behavior of the consumers by using only smart meter data, and it mitigates the requirements such as high-cost sensors, maintenance/update and provides a cost-effective solution. This paper presents an efficient NILMbased energy management system (EMS) for residential mic...
Article
Full-text available
This paper is about shifting microgrid control concepts to bioastronautics. Closed ecological systems (CES) are usefull in space platforms and future mars/lunar bases. We demonstrated that we can model and control CES as a special ki