Publications de Jordan Holweger

Distributed flexibility as a cost-effective alternative to grid reinforcement

Christophe Ballif, Alejandro Pena Bello, Noémie Alice Yvonne Ségolène Jeannin, Nicolas Würsch, Jordan Holweger

The deployment of distributed photovoltaics (PV) in low-voltage networks may cause technical issues such as voltage rises, line ampacity violations, and transformer overloading for distribution system operators (DSOs). These problems may induce grid reinfo ...

ELSEVIER2023

Flexibility for large-scale deployment of PV systems in low-voltage grids

Jordan Holweger

To meet the net-zero emission target by 2050, Switzerland must install between 34 and 50 GW of distributed photovoltaic (PV). The inherent challenge with such an extensive integration of stochastic generation is to provide the flexibility for balancing sup ...

EPFL2021

SCCER JA-RED - A list of possible ancillary services for enhanced grid operation and implementation of the most effective ones at the RE demo site - Deliverable 1.2.3

Luc Girardin, Lionel Benjamin Bloch, Jordan Holweger, Luise Middelhauve

There is a need by distribution system operators and power suppliers to propose ancillary services to enhanced grid operation allowing the optimal deployment of photovoltaic panels, cogeneration technologies and distributed storage. This deliverable theref ...

2020

Mitigating the impact of distributed PV in a low-voltage grid using electricity tariffs

Christophe Ballif, Nicolas Würsch, Lionel Benjamin Bloch, Jordan Holweger

A high share of distributed photovoltaic (PV) generation in low-voltage networks may lead to over-voltage, and line/transformer overloading. To mitigate these issues, we investigate how advanced electricity tariffs could ensure safe grid operation while en ...

2020

Optimised Heat Pump Management for Increasing Photovoltaic Penetration into the Electricity Grid

Christophe Ballif, Lionel Benjamin Bloch, Jordan Holweger, Cristian Sanchez Perez

Advanced control of heat pumps with thermal storage and photovoltaics has recently been promoted as a promising solution to help decarbonise the residential sector. Heat pumps and thermal storage offer a valuable flexibilisation mean to integrate stochasti ...

2019

Impact of advanced electricity tariff structures on the optimal design, operation and profitability of a grid-connected PV system with energy storage

Christophe Ballif, Nicolas Würsch, Lionel Benjamin Bloch, Jordan Holweger

The increasing penetration of residential photovoltaics (PV) comes with numerous challenges for distribution system operators. Technical difficulties arise when an excess of PV energy is injected into the grid, causing voltage rise or overloading of the li ...

2019

Unsupervised algorithm for disaggregating low-sampling-rate electricity consumption of households

Christophe Ballif, Nicolas Würsch, Lionel Benjamin Bloch, Jordan Holweger, Marina Dorokhova

Non-intrusive load monitoring (NILM) has been extensively researched over the last decade. The objective of NILM is to identify the power consumption of individual appliances and to detect when particular devices are on or off from measuring the power cons ...

2019

SCCER JA-RED - Detailed evaluation of the grid operation bottlenecks and load shifting potential for the reference system - Deliverable 1.2.2

Luc Girardin, Paul Michael Stadler, Lionel Benjamin Bloch, Jordan Holweger, Luise Middelhauve

Based on the analysis of the reference case, models developed at the PVLAB-EPFL and IPESEEPFL have been valued and improved to assess the impact of distributed generation and ancillary services on REel demonstrator. The models are used to evaluate solution ...

2019

SCCER-FURIES - Design of Sizes for Buildings Energy Systems as a Function of the Grid Evolution - Deliverable 1.4.1a

Luc Girardin, Paul Michael Stadler, Lionel Benjamin Bloch, Jordan Holweger, Luise Middelhauve, Hervé Tommasi

The increasing use of renewable energy is a deep going trend mainly supported by the sustained annual growth rate of solar photovoltaic, wind power and biogases. The expansion and evolution of the distribution grids is therefore a key issue to ensure a sec ...

2018

SCCER JA-RED - Description of the multi-energy demonstration system in the RE demo site - Deliverable 1.2.1

Luc Girardin, Nicolas Würsch, Lionel Benjamin Bloch, Jordan Holweger, Hervé Tommasi

In the optic of providing guidelines for the optimal integration of renewable energy in a connected multi-energy context, this report presents EPFL - IPESE and EPFL - PV-lab’s common work on the initial assessment of Romande Energie (RE) demonstration site ...

2017