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Biogas can be an important fuel for the European economy. It is a green energy source that will help achieve climate neutrality by 2050. It is very likely that there will be an increase in biogas production in Europe, especially in countries with great potential, such as Poland. This paper will present the current status of biogas in Poland. It also shows the characteristics of this sector and a comparison...
This paper explores the problems of the averaging and interpolation of electricity consumption and distributed photovoltaic energy generation data on higher than hour resolution levels. The paper compares different interpolation methods, like linear and spline interpolation and discusses modelling approaches for the energy data reconstruction on the basis of minutely and hourly data. The results are...
This paper describes selected issues concerning realization of energy storage system (ESS) designed to operate in power distribution system. This paper presents a modular approach of 300 kVA power converter operating with superconducting magnetic energy storage (SMES), which gives high dynamics together with high power and suitable capability for instantaneous energy storage. Analysis and simulation...
This paper proposes a DC-bus signaling (DBS) method for a power management in a DC microgrid. In order to autonomously increase its reliability and response speed. As opposed to a centralized power management system, which needs communication among the power sources and load, the proposed DBS method uses the common DC-bus voltage to determine proper operation and does not require communication. The...
In this manuscript a new interleaved topology based on the three-port boost converter is presented. A new modulation scheme that works for the interleaved and non-interleaved 3-port boost converters is proposed as well. Models for interleaved and non-interleaved converters that describe the behavior in any of the different working modes are developed. These models can be easily averaged in order to...
In the upcoming years, thousands of battery storage systems will be decommissioned from electric vehicles. Instead of recycling or sending them immediately to landfills, these battery systems could be reused in other applications, such as grid or end-user applications. Second-life batteries are still expected to be capable of storing and delivering substantial energy. It is possible that they could...
Energy storage has long bee n lauded as the holy grail of energy technologies. Low-cost energy storage, proponents say, will usher in a new era in power systems, enabling large penetrations of variable renewable energy technologies and reshaping the way electricity networks deliver energy.
This study focuses on one of the main concepts regarding strategies to be adopted to reach the European policy targets, regarding Green House Gas emissions (GHG). The subsidization of renewable energy sources showed its limits, due to the fact that such power plants can create several problems to the power grids they are connected to, and for this reason the implementation of new or more advanced...
With the increase of energy demand and environmental awareness, It becomes an inexorable trend to develop and utilize renewable energy and to increase the proportion of clean energy in end use energy. The development of power grid in future should not only consider power demand but also accommodate large-scale renewable energy. This paper conducts a study on the development pattern of future power...
As it is well known, the Bologna Process is a voluntary intergovernmental European cooperation initiative that led to the creation of the named European Higher Education Area (EHEA). EHEA was formed to promote mobility, increase academic recognition and attract students and staff from around the world to Europe. On the other hand, since September 2016, the Technical University of Catalonia (Universität...
The paper analyses the impact of energy storage and electric vehicles to the flexibility of electric power system in terms of securing reserves for covering deviations between consumption and generation of electricity, taking into account the share of non-predictable renewable sources in the network. Over the last few years, the share of renewable sources has increased, and wind power contributes...
During the last two centuries, the urban percentage of the world's population, combined with the overall growth phenomenon, has deeply increased and it is projected to reach 60% by 2030. In this current context linked to environmental issues managing to plan sustainable cities appears a main policy target. The implementation of Zero Energy Buildings as a European target becomes a challenge for the...
The European Commission published the climate and energy package “20 20 20” with the principle scope of reducing the greenhouse gas (GHG) emissions and increasing the production from renewable energy sources (RES). Electric Vehicles (EVs) contribute to lower the GHG emissions, as they produce no exhaust gas as opposed to internal combustion engine (ICE) vehicles. The present study is focused on the...
The aim of this study is a comparison among Italian and Brazilian electrical energy system with a particular focus on renewable energy sources. The energy sector has a key role in the sustainable development of a country, so it influences economic and political choices. The work would underline differences, common point among two country, specially, in this particular socio-economic period and it...
Even though the role of regulatory policies in the electricity market supporting the diffusion of distributed generation and energy efficiency has been well investigated, the relationship between changes in electricity tariff and the impact on investments in RES and Energy Efficiency Measures (EEM) has been under researched in academic literature so far. The paper is a first attempt to analyze how...
The main goal of electricity markets has always been to create perfect competition markets. To facilitate this competition, the European target model of electricity markets is the energy-only market. The main target of the three Energy Packages is to reap the benefits of free markets with competitive prices and energy efficiency, and to ensure increased transparency in retail markets to benefit consumers...
To respond to increasing energy demand, consumption relocation and renewable energy integration into the grid, the old Romanian power distribution substation has to be retrofitted. The paper presents a load flow and short-circuits analysis carried out on a newly retrofitted substation form the northern part of Romania. Results obtained through numerical simulation, were used for the optimal design...
The paper analyses historical cross border commercial flow (CBCF) of electricity for Germany for the years 2012 to 2015. Based on graphical solution for CBCF it is hypothesized that with increasing shares of fluctuating renewable energy sources in Germany, it would be exporting more electricity at lower prices while importing at relatively higher prices. For this the relation between CBCF, spot prices...
In this paper, seven European Frequency Restoration Reserve (FRR) auctions (positive and negative) are investigated both theoretically and empirically. First, the seven FRR market environments (i.e. supply sides and auction designs) are illustrated. Then, a theoretic analysis of the seven FRR auctions is presented. For this, we identify the underlying cost structures and develop the bidding calculus...
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