Prof. Dr. Javier Valdes

Professor

TCF Campus Deggendorf ITC2 2.50b

08551/91764-40


Zeitschriftenartikel
  • Javier Valdés
  • Sebastian Wöllmann
  • Andreas Weber
  • G. Klaus
  • Christina Sigl
  • M. Prem
  • Robert Bauer
  • Roland Zink
A framework for regional smart energy planning using volunteered geographic information, vol. 54, pg. 179-193.

In: Advances in Geosciences

  • 2020

DOI: 10.5194/adgeo-54-179-2020

This study presents a framework for regional smart energy planning for the optimal location and sizing of small hybrid systems. By using an optimization model – in combination with weather data – various local energy systems are simulated using the Calliope and PyPSA energy system simulation tools. The optimization and simulation models are fed with GIS data from different volunteered geographic information projects, including OpenStreetMap. These allow automatic allocation of specific demand profiles to diverse OpenStreetMap building categories. Moreover, based on the characteristics of the OpenStreetMap data, a set of possible distributed energy resources, including renewables and fossil-fueled generators, is defined for each building category. The optimization model can be applied for a set of scenarios based on different assumptions on electricity prices and technologies. Moreover, to assess the impact of the scenarios on the current distribution infrastructure, a simulation model of the low- and medium-voltage network is conducted. Finally, to facilitate their dissemination, the results of the simulation are stored in a PostgreSQL database, before they are delivered by a RESTful Laravel Server and displayed in an angular web application.
  • Europan Campus Rottal-Inn
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
  • Y. Masip Macia
  • Wolfgang Dorner
  • Luis Ramirez Camargo
Unsupervised grouping of industrial electricity demand profiles: synthetic profiles for demand-side management applications, vol. 215 (Part A), pg. 118962.

In: Energy

  • 2020

DOI: 10.1016/j.energy.2020.118962

Demand side management is a promising alternative to offer flexibility to power systems with high shares of variable renewable energy sources. Numerous industries possess large demand side management potentials but accounting for them in energy system analysis and modelling is restricted by the availability of their demand data, which are usually confidential. In this study, a methodology to synthetize anonymized hourly electricity consumption profiles for industries and to calculate their flexibility potential is proposed. This combines different partitioning and hierarchical clustering analysis techniques with regression analysis. The methodology is applied to three case studies in Chile: two pulp and paper industry plants and one food industry plant. A significant hourly, daily and annual flexibility potential is found for the three cases (15% to 75%). Moreover, the resulting demand profiles share the same statistical characteristics as the measured profiles but can be used in modelling exercises without confidentiality issues.
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • Raphaela Pagany
  • Javier Valdés
  • Wolfgang Dorner
Risk prediction of wildlife-vehicle collisions comparing machine learning methods and data use, pg. 436-440.
  • 2020

DOI: 10.1109/ACIT49673.2020.9208946

Risk prediction of wildlife-vehicle collisions is crucial for reducing the abundant number of road accidents with wildlife worldwide. In this study, three different machine learning approaches - Gaussian Naive Bayes, Stochastic Gradient Descent, Random Forest - relying on recorded accident data, environmental, temporal and infrastructural parameters, are used to test the impurity of these parameters, and to predict the risk of wildlife-vehicle collisions. We use a dataset of one million police recorded accidents for southeastern Bavaria. Based on different approaches for feature engineering, we show the importance of data pre-processing and cleaning. With Random Forest, we receive a prediction accuracy of accidents of 86.7%. Additionally, the transferability of the three approaches is discussed, and possible ways of dynamic warnings via smartphone are presented.
  • TC Freyung
  • Angewandte Informatik
  • DIGITAL
Zeitschriftenartikel
  • Roland Zink
  • Javier Valdés
  • Jane Wuth
Prioritizing the Chicken or Egg? Electric Vehicle Purchase and Charging Infrastructure Subsidies in Germany, vol. 8, pg. 185-198.

In: Politics and Governance

  • 2020

DOI: 10.17645/pag.v8i3.3025

To meet current targets for greenhouse gas emissions in Europe, emissions, especially those originating from the road transport sector, need to be reduced. Plans are to achieve this goal by substituting fossil fuel vehicles with electric vehicles (EVs). This article first discusses conceptually the impact of an increasing share of EVs on the electricity grid and suitable locations for charging stations with examples from a Case Study in Lower Bavaria. Secondly, the impact of purchase subsidies on EV purchases in Germany, a high-income country characterized by an important automotive industry and an increasing share of private vehicles is examined. To achieve this, yearly information on EV purchases were analyzed by applying the Synthetic Control Method. Combining data from different sources including the European Alternative Fuels Observatory, Eurostat, and the European Automobile Manufacturers' Association, an overall picture was developed. Results indicate a difference between private, semi-public, and public charging infrastructures. Its spatial distribution does not correspond to a specific development strategy. Moreover, EV subsidies have a limited effect in Germany when controlling for market size. Limiting the discussion to a trade-off between subsidizing infrastructures or EV purchases obviates the multidimensionality of the problem as neither of them may be sufficient to accelerate the transition per se. Furthermore, if electricity provided for EVs comes mainly from fossil carriers, the changes in the road transport sector will not yield the expected emission reductions. The transition towards renewables is directly intertwined with the effects of EVs on emission reductions in the road transport sector.
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
  • A. Poque González
  • Y. Masip Macia
  • Wolfgang Dorner
  • Luis Ramirez Camargo
Unveiling the potential for combined heat and power in Chilean industry-A policy perspective, vol. 140, pg. 111331.

In: Energy Policy

  • 2020

DOI: 10.1016/j.enpol.2020.111331

Combined Heat and Power (CHP) has again become a key element in international energy and environmental policy, since it is one of the most promising methods of ensuring grid stability, making an energy system more flexible and environmentally friendly. This is particularly true in the case of Chile, which has an energy system that progressively introduced volatile renewable energy sources such as wind and solar energy. This scenario has led to the development of a new regulatory strategy and CHP flagship projects throughout the country. Despite this interest, there has been no analysis of CHP development or the impact of the latest regulatory changes on its evolution. This study presents an updated cadastre of the CHP facilities as of 2018, together with an analysis of its evolution in terms of an energy policy. From this cadastre, interviews with experts, and a review of the regulations and incentives, the study identifies the main policy barriers for CHP development in Chile. Furthermore, this study presents a series of challenges and recommendations for the country.
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • Javier Valdés
  • Luis Ramirez Camargo
  • Wolfgang Dorner
Generating consumer load profiles to assess demand-side management potential of industries. Paper ID: 1063, pg. 1-5.
  • 2020
  • TC Freyung
  • Angewandte Informatik
  • NACHHALTIG
Vortrag
  • Raphaela Pagany
  • Javier Valdés
  • Wolfgang Dorner
Risk prediction of wildlife-vehicle collisions comparing machine learning methods and data use

In: 2020 10th International Conference on Advanced Computer Information Technologies (ACIT)

  • 2020
  • Angewandte Informatik
  • TC Freyung
  • DIGITAL
Beitrag (Sammelband oder Tagungsband)
  • Luis Ramirez Camargo
  • Javier Valdés
  • Y. Masip Macia
  • Wolfgang Dorner
Assessment of on-site steady electricity generation from renewable energy sources in Chile, pg. 1099-1104.
  • 2019

DOI: 10.1016/j.egypro.2019.01.266

Chile has an immense renewable energy potential but their integration in the energy system constitutes a major challenge. The complex topography of the country, the isolation of the different electric grids and the variability of renewable energy sources, makes energy transmission from locations with high variable renewable power generation potential to the demand centres not an easy task. The present study aims at assessing the potential of combining solar power, wind power and storage systems to provide steady loads already from the source. Such a combination should take advantage of complementarity between variable renewable sources and serves to simplify their integration in the energy system. The analysis relies on an optimization model to size hybrid renewable energy systems and 10 years of weather data from the brand new ERA-5 reanalysis. Necessary system sizes to constantly generate 1 MWh of electricity for every hour during the period 2008-2017 are calculated for all possible locations across the country. The results show that the necessary generation and storage capacities to provide a steady energy output are very high even for areas with exceptionally high renewable energy potential.
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • Javier Valdés
  • Luis Ramirez Camargo
  • A. Poque
  • Y. Masip Macia
  • Wolfgang Dorner
Potential of the paper industry as system flexibility provider for an electrical system with high renewable energy share in Chile
  • 2019

  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • Jane Wuth
  • Javier Valdés
  • Luis Ramirez Camargo
  • Wolfgang Dorner
Energy Modelling in Rural Areas with Spatial and Temporal Data in Germany and Czech Republic, pg. 220-227.
  • 2019

One of the major challenges for the energy transition is to reconcile variable renewable energy production with stochastically changing energy demand including the pursued changes in e.g. transport like electro mobility. This requires smart systems that should be designed to minimize balancing and transmission costs. The design and modelling of such systems requires high resolution energy generation and demand data, which usually either do not exist or is not available. Methodologies to address this lack of data populate scientific literature but its replicability is limited by an inadequate level of detail in the description of the methodologies and to a larger extent by the absence or low quality of basic data. This manuscript summarizes severalyears of research in energy modelling using Geographical Information Systems as well as spatial and temporal data of the rural areas in Bavaria (Germany) and the Czech Republic. Data requirements for energy demand and energy supply including different types of users and technologies are addressed. Irreconcilable data gaps are presented, examples to fill data gaps as well as recommendations for future necessary developments are provided
  • Angewandte Informatik
  • TC Freyung
  • DIGITAL
  • NACHHALTIG
Vortrag
  • Jane Wuth
  • Javier Valdés
  • Luis Ramirez Camargo
  • Wolfgang Dorner
Energy Modelling in Rural Areas with Spatial and Temporal Data in Germany and Czech Republic

In: 6th International Conference on Geographical Information Systems Theory, Applications and Management (GISTAM)

  • 2019
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • A. Poque González
  • Y. Masip Macia
  • Javier Valdés
  • Luis Ramirez Camargo
Cogeneración en Chile: Capacidades, desarrollo y perspectivas, pg. 05.01-05.09..
  • 2019
  • Elektrotechnik und Medientechnik
  • TC Freyung
  • NACHHALTIG
Beitrag (Sammelband oder Tagungsband)
  • Javier Valdés
The role of policy on the Chilean sustainable energy transition in historical perspective
  • 2019
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Vortrag
  • Javier Valdés
The role of policy on the Chilean sustainable energy transition in historical perspective

In: Energy and Society in Transition: 2nd International Conference on Energy Research and Social Science

  • 2019
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Y. Masip Macia
  • A. Poque González
  • Luis Ramirez Camargo
  • Javier Valdés
  • M. Valin Fenández
Gestión de la Demanda en la Industria de Chile: Aprendiendo del Caso Alemán (Demand Side Management on the Chile Industry: Learning From the German Case ), vol. 24

In: Ingeniería

  • 2019

DOI: 10.14483/23448393.14709

Context: Both pioneer countries and those that have recently begun an energy transition towards renewable energy require high levels of flexibility in their electrical systems. This article reviews the Demand Side Management (DSM) application as a tool to provide flexibility, and then, to achieve renewable energy penetration objectives. Method: A systematic mini-review of the literature has been done to review the origin and evolution of the concept of DSM in German and Chilean industry, at the same time, to make a parallel and comparison between them. Results: Both countries have difficulties in taking advantage of the demand management potential in the industry, the lack of promoting policies and the lack of specific regulatory frameworks are some of the causes. Conclusions: It is necessary to speed up attention to the management of demand, it is important that the academy contributes with estimates of potential, it also needs public policies that encourage the use of this tool.
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
  • A. Poque González
  • Luis Ramirez Camargo
  • M. Valin Fenández
  • Y. Masip Macia
  • Wolfgang Dorner
Industry, flexibility, and demand response: Applying German energy transition lessons in Chile, vol. 54, pg. 12-25.

In: Energy Research & Social Science

  • 2019

DOI: 10.1016/j.erss.2019.03.003

Demand side management (DSM) contributes, among its other purposes, to provide stability and flexibility to energy systems that include a high proportion of variable renewable energy in pioneer countries and those which recently began their energy transition. Among DSM policies, implementation of measures and mechanisms for a demand response (DR) is not a trivial matter. This study presents a review and comparative analysis of the major energy policy developments in Germany and Chile. Based on i) the relevance of the industry sector in both countries, ii) the difficulty in implementing the regulatory framework and iii) the importance given to the industrial customers in the German legislation and DR literature, the following analysis will focus on both medium and large industrial customers. The goals are to review the challenges in untying the full DR potential of the productive industry and to provide recommendations for the promotion of DR in Chile. Emphasis is placed on the lessons learned in fitting the wide potential of DR in the German electricity markets. A review of the successes and failures of the German experience reveals the potential risk that poor policy implementation can have in both the short and long term.
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Vortrag
  • Javier Valdés
Generating consumer load profiles to assess demand side management potential of industries.

In: 11th International Conference on Applied Energy (ICAE2019)

  • 2019
  • Angewandte Informatik
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Luis Ramirez Camargo
  • Javier Valdés
  • Y. Masip Macia
  • Wolfgang Dorner
Assessment of on-site steady electricity generation from hybrid renewable energy systems in Chile, vol. 250, pg. 1548-1558.

In: Applied Energy

  • 2019

DOI: 10.1016/j.apenergy.2019.05.005

Chile has an immense renewable energy potential but its integration into the energy system constitutes a major challenge. The country has a complex topography that is expressed by a divided national grid with almost isolated subsystems and wide differences in the availability of renewable energy resources. The present study aims at evaluating the potentials of combining solar power, wind power and storage systems to provide steady loads already from the generation source. The analysis relies on an optimization model to size hybrid renewable energy systems and 10 years of weather data from the brand new ERA5 global reanalysis. Multiple scenarios are calculated and intercompared for all possible locations across the country. These scenarios include system sizing considering hourly weather data for the period 2008–2017 and for one year without major weather extreme events. In both analyses, the results are calculated for systems that generate 1 MWh of electricity at every time step and systems that have certain intraday flexibility. Results show that the necessary generation and storage capacities to provide a steady energy output are very high even for areas with exceptionally high renewable energy potential (in the Atacama desert the system configuration requirements could reach 10 MWp of photovoltaics and 10 MWh of storage). Intraday flexibility has direct effects on these results by reducing the total size of the systems but the effects on the sizes of the installations of the particular technologies depend on the individual geographical location.
  • TC Freyung
  • Angewandte Informatik
  • NACHHALTIG
Zeitschriftenartikel
  • Luis Ramirez Camargo
  • F. Nitsch
  • K. Gruber
  • Javier Valdés
  • Jane Wuth
  • Wolfgang Dorner
Potential Analysis of Hybrid Renewable Energy Systems for Self-Sufficient Residential Use in Germany and the Czech Republic, vol. 12, pg. 4185.

In: Energies

  • 2019

DOI: 10.3390/en12214185

Independence from the power grid can be pursued by achieving total self-sufficient electricity supply. Such an energy supply model might be particularly interesting for settlements located in rural areas where enough space is available for energy generation installations. This article evaluates how and at what cost electricity demand of residential users across Germany and the Czech Republic could be covered by hybrid renewable energy generation systems consisting of photovoltaics, micro-generation wind turbines and batteries. High-resolution reanalysis data are used to calculate necessary system sizes over a large area by simultaneously accounting for the temporal variability of renewable energy. For every potential location in the research area, the hybrid system requirements for clusters of 50 self-sufficient single-family houses are calculated. The results indicate no general trend regarding the size of the respective technologies, although larger areas where PV-wind power complementarity enables lowering the total system costs and required storage capacities were determined. Assuming that the cluster of households could be constituted and depending on the location, the total installation and operation costs for the proposed systems for a lifetime of 20 years range between EUR 1.8 Million and EUR 5 Million without considering costs of financing. Regions with the lowest costs were identified mainly in the south of Germany.
  • TC Freyung
  • Angewandte Informatik
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
  • Jane Wuth
  • Roland Zink
  • Sebastian Schröck
  • Matthias Schmidbauer
Extracting Relevant Points of Interest from Open Street Map to Support E-Mobility Infrastructure Models, vol. 4, pg. 323-341.

In: Bavarian Journal of Applied Sciences

  • 2018

DOI: 10.25929/bjas.v4i1.51

Neben kommerziell bereitgestellten Geodaten nehmen freiwillig erhobene geographische Daten (VGI, volunteered geographic information) in der Forschung einen wachsenden Stellenwert ein. Plattformen wie OpenStreetMap (OSM) bieten inzwischen eine enorme Menge an Geodaten, deren Qualität und deren Mehrwert für die Forschung zunehmend kritisch betrachtet werden. Besonders dann, wenn es um räumliche Planung geht, müssen die Daten vor der Anwendung angemessen validiert und bereinigt werden. In diesem Artikel wird ein Datenverarbeitungsmodell vorgestellt, mit dem OSM-Daten so aufbereitet werden können, dass der Bedarf an Ladeinfrastruktur für Elektroautos über von Nutzern eingetragene Point of Interests (POI) räumlich möglichst genau erfasst und abgebildet werden kann. Zunächst erfolgt eine Selektion relevanter Datensets durch eine Prävalidierung. Im zweiten Schritt werden die wichtigsten POI selektiert und spezifiziert. In einem dritten Schritt werden alle OSM-immanenten Schwierigkeiten beseitigt. Das hier vorgestellte Datenverarbeitungsmodell ist auf das Thema Elektromobilität zugeschnitten, für welches POIs in die vier Zeitkategorien Arbeit, Leben, Einkaufen und Freizeit eingeteilt werden, um so den Bedarf an Ladeinfrastruktur zu erheben. Durch dieses Modell der Datenverarbeitung soll die Energienachfrage für Elektroautos räumlich möglichst realistisch dargestellt werden und Rohdaten mit ihren bekannten Fehlern durch den OSM-Datensammlungsprozess bereinigt aufbereitet werden. Anhand einer Fallstudie, die im bayerisch-tschechischen Grenzraum durchgeführt wurde, wird gezeigt, dass die Fehlerrate durch die Implementierung validierter Daten um ca 10% reduziert werden kann.
  • TC Freyung
  • Elektrotechnik und Medientechnik
  • DIGITAL
  • MOBIL
Beitrag (Sammelband oder Tagungsband)
  • A. Poque González
  • Luis Ramirez Camargo
  • Javier Valdés
  • Y. Masip Macia
Aportes de la Industria productiva a la flexibilidad del sistema eléctrico: Una comparación entre los casos Alemán y Chileno
  • 2018
  • TC Freyung
  • Elektrotechnik und Medientechnik
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
Arbitrariness in Multidimensional Energy Security Indicators, vol. 145, pg. 263-273.

In: Ecological Economics

  • 2018
Energy security (ES) has emerged as an issue of great importance in recent years. Nevertheless, the applied concepts of ES are rather vague and many methodologies have been proposed to construct ES indicators. Among these, composite indicators are very popular despite being affected by several methodological choices that often result in lack of robustness of the rankings involved. From a critical analysis of the methodological characteristic of ES composite indicators this study contributes to the debate on the construction of ES composite indicators by providing a better understanding of the various methods that are available. The analysis frames the ES definitions employed on multidimensional indicators and deals with the methodological implications of including the concept of sustainability.
  • TC Freyung
  • NACHHALTIG
Vortrag
  • Javier Valdés
  • Jane Wuth
  • Matthias Schmidbauer
  • Roland Zink
Generating mobility solutions to electric vehicle charging stations using Open Street Map data

In: Geomatika Konference

  • 2018
  • TC Freyung
  • Elektrotechnik und Medientechnik
  • MOBIL
Vortrag
  • Javier Valdés
  • Jane Wuth
  • Matthias Schmidbauer
  • Roland Zink
Eroad - Modelling electric vehicle charging stations using Open Street Map data. Posterpräsentation

In: 4. Jahreskonferenz des Netzwerks INDIGO (Internet und Digitalisierung Ostbayern)

  • 2018
  • TC Freyung
  • Elektrotechnik und Medientechnik
  • MOBIL
Zeitschriftenartikel
  • A. Poque González
  • Y. Masip Macia
  • Javier Valdés
  • Luis Ramirez Camargo
Cogeneración en Chile: Capacidades, desarrollo y perspectivas, vol. 22

In: Avances en Energías Renovables y Medio Ambiente (AVERMA)

  • 2018
En Chile, el proyecto de cogeneración más antiguo data de 1930 y operó hasta el año 1997. Sin embargo, pese a que la tecnología lleva introducida largo tiempo, pocos son los estudios que han analizado el potencial de CHP y su evolución. Un primer paso para el estudio del potencial del país es la creación de un catastro que incluya la capacidad instalada. El interés de este ejercicio radica en el potencial de integración de mayores cantidades de CHP en el sistema eléctrico con el objetivo de hacer frente a la intermitencia de fuentes de energía no convencionales. Además, las plantas CHP pueden ayudar a alcanzar los objetivos de eficiencia energética gracias a la posibilidad de los generadores de volcar a la red tanto la electricidad como calor no consumido en los procesos productivos. Sin embargo, para que esto ocurra es necesario el desarrollo de un marco regulatorio acorde a las capacidades y características de las plantas de CHP. El objetivo de este artículo es precisamente identificar las características de las instalaciones en industrias específicas, así como su evolución, con el objetivo de extrapolar los datos al resto de la economía y obtener un potencial de CHP para el país. Para ello, se han hecho consultas de catastros anteriores, así como entrevistas con empresas para conocer el estado actual del parque de plantas de CHP en el país.
  • TC Freyung
  • NACHHALTIG
Vortrag
  • Javier Valdés
  • Jane Wuth
  • Roland Zink
Eroad - Modelling electric vehicle charging stations using Open Street Map data

In: 3. Deggendorfer Fachsymposium Elektromobiltät der Zukunft

  • 2018
  • Elektrotechnik und Medientechnik
  • TC Freyung
  • MOBIL
Beitrag (Sammelband oder Tagungsband)
  • Javier Valdés
  • Y. Ménière
  • I. Rudyk
Patents and the Fourth Industrial Revolution: The inventions behind digital transformation
  • 2017
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • G. Escribano
  • Javier Valdés
Oil Prices: Governance Failures and Geopolitical Consequences, vol. 22, pg. 693-718.

In: Geopolitics

  • 2017
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
  • G. Francés
  • González, E. S. M.
Energy security and renewable energy deployment in the EU: Liaisons Dangereuses or Virtuous Circle?, vol. 62, pg. 1032-1046.

In: Renewable and Sustainable Energy Reviews

  • 2016
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • Javier Valdés
Evolución y consistencia en la política de seguridad energética de la UE: los Proyectos de Interés Común, vol. 29, pg. 69.

In: Papeles de Europa

  • 2016
  • TC Freyung
  • NACHHALTIG
Zeitschriftenartikel
  • M. Díaz-Granados
  • G. Francés
  • Javier Valdés
Petróleo y geopolítica: gobernanza por otros medios, pg. 83-98.

In: Información Comercial Española, ICE: Revista de economía

  • 2015
  • TC Freyung
  • NACHHALTIG