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Modeling and Transient Simulation of Unified Power Flow Controllers (UPFC) in Power System Studies

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Conditions for transient epidemics of waterborne disease in spatially explicit systems

Andrea Rinaldo, Enrico Bertuzzo, Lorenzo Mari

Waterborne diseases are a diverse family of infections transmitted through ingestion of-or contact with-water infested with pathogens. Outbreaks of waterborne infections often show well-defined spatial signatures that are typically linked to local eco-epid ...

2019

Load Flow in Multiphase Distribution Networks: Existence, Uniqueness, Non-Singularity and Linear Models

Jean-Yves Le Boudec, Andrey Bernstein, Cong Wang

This paper considers unbalanced multiphase distribution systems with generic topology and different load models, and extends the Z-bus iterative load-flow algorithm based on a fixed-point interpretation of the AC load-flow equations. Explicit conditions fo ...

IEEE Institute of Electrical and Electronics Engineers2018

Increasing the PV hosting Capacity of Distribution Grids with Distributed Storage: Siting, Sizing and Costs

Mario Paolone, Fabrizio Sossan, Rahul Kumar Gupta, Enrica Scolari

The capacity of electrical distribution systems of hosting photo-voltaic (PV) generation is limited due to the requirements of distribution system operators (DSOs) to respect statutory voltage levels along feeders and not exceed line current limits. Tradit ...

2018

Battery-Free, Sticker-Like, Device for Health Monitoring, Operated by Optical Power Transfer

Sandro Carrara

This work presents the concept of a battery-free, sticker-like, device for a non-invasive health-monitoring sensor. The device consists of two functional blocks: an optical power-transfer block and an amperometric measurement block. The former accumulates ...

IEEE2018

A predictive pan-European economic and production dispatch model for the energy transition in the electricity sector

Philippe René Joseph Jacquod

The energy transition is well underway in most European countries. It has a growing impact on electric power systems as it dramatically modifies the way electricity is produced. To ensure a safe and smooth transition towards a panEuropean electricity produ ...

Ieee2017

On the Properties of the Compound Nodal Admittance Matrix of Polyphase Power Systems

Mario Paolone, Andreas Martin Kettner

Most techniques for power system analysis model the grid by exact electrical circuits. For instance, in power flow study, state estimation, and voltage stability assessment, the use of admittance parameters (i.e., the nodal admittance matrix) and hybrid pa ...

IEEE Institute of Electrical and Electronics Engineers2018

Medium Voltage DC-DC Converter for Power Collection Links : A Multistage Stacked Boost Architecture

Gina Kristin Steinke

Nowadays electrical energy generation is an important topic discussed in the society. Since technologies like wind or solar energy generation are most of the time placed far away from the city centres one point to focus on is the transmission of the energy ...

EPFL2017

Frequency-Domain Control Design in Power Systems

Christoph Manuel Kammer

The scope of this thesis encompasses two main subjects: fixed-structure data-driven control design on one side, and control design in power systems on the other. The overall goal is to identify challenging and relevant problems in power systems, to express ...

EPFL2018

Electronic solutions for power system emulation

Guillaume Olivier Lanz

Nowadays electric power systems are subject to continuous changes and the needs in the power generation and delivery service are constantly increasing, with a higher complexity of a progressively more distributed network. Because the impact of a failure ca ...

EPFL2017

An Energy Efficient Power Converter for Zero Power Wearable Devices

Milad Ataei Ashtiani

Early diagnosis of Alzheimer's and epilepsy requires monitoring a subject's development of symptoms through electroencephalography (EEG) signals over long periods. Wearable devices enable convenient monitoring of biosignals, unlike complex and costly hospi ...

EPFL2018

AC OPF in radial distribution networks – Part I: On the limits of the branch flow convexification and the alternating direction method of multipliers

Mario Paolone, Jean-Yves Le Boudec, Dan-Cristian Tomozei, Konstantina Christakou

The optimal power-flow problem (OPF) has always played a key role in the planning and operation of power systems. Due to the non-linear nature of the AC power-flow equations, the OPF problem is known to be non-convex, therefore hard to solve. During the la ...

Elsevier2017

Harmonic current prediction by impedance modeling of grid-tied inverters: A 1.4 MW PV plant case study

Grid-tied inverters are the main responsible for the successful integration of photovoltaic (PV) plants in the power grid. Two important challenges are the integration of power plants based-inverters and their contribution to the power system quality. This ...

Elsevier Sci Ltd2017

Power-System State Estimation based on PMUs : Static and Dynamic Approaches - from Theory to Real Implementation

Lorenzo Zanni

An increasing number of phasor measurement units (PMUs) are being deployed in power systems in order to enhance the situational awareness and, in the near future, we expect that many networks will be extensively equipped with PMUs. These devices provide ac ...

EPFL2017

Fast Simulation of Electromagnetic Transients in Power Systems : Numerical Solvers and their Coupling with the Electromagnetic Time Reversal Process

Reza Razzaghi

The development of modern and future power systems is associated with the definition of new approaches for their simulation, control, and protection. To give an example, the increasing connection of massive renewable energy conversion systems is justifying ...

EPFL2016

Real-Time Distributed Algorithms for Nonconvex Optimal Power Flow

Colin Neil Jones, Georgios Stathopoulos, Yuejiang Liu, Jean-Hubert Hours

The optimal power flow (OPF) problem, a fundamental problem in power systems, is generally nonconvex and computationally challenging for networks with an increasing number of smart devices and real-time control requirements. In this paper, we first investi ...

2017