
Antonis G. TsikalakisHellenic Mediterranean University · Electrical and Computers Engineering
Antonis G. Tsikalakis
Phd iN Distributed Generation and Storage -H.M.U
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63
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Education
September 1997 - July 2008
Publications
Publications (63)
European islands have been leading the charge in renewable energy innovation. Yet, the intermittent nature of sources like solar and wind poses challenges such as grid saturation and frequency variations. Limited interconnection with mainland grids exacerbates these issues, necessitating backup from conventional power sources during low-production...
In this manuscript, a novel Δ-circuit approach is proposed, which enables the fast calculation of fault currents in large islanded AC microgrids (MGs), supplied by inverter-based distributed generators (IBDGs) with virtual impedance current limiters (VICLs). The concept of virtual impedance for limiting the fault current of IBDGs has gained the int...
The development of electric vehicles (EVs) as part of the electrification of the transportation sector plays a significant role in energy transition to a low-carbon and highly renewable society. The use of EVs has been promoted through the development of inclusive strategies for electromobility in the recent years. Apart from actions directed and f...
Mastering Energy Supply focusing on Isolated Areas (MESfIA) Erasmus+ Capacity Building project, aims to provide high quality postgraduate education on energy supply systems for engineers and graduates from science departments, aiming to have activity or to be employed in projects in countries with many isolated areas and insular systems. It is a tr...
Mastering Energy Supply focusing on Isolated Areas (MESfIA)
Erasmus+ Capacity Building project, aims to provide high quality postgraduate
education on energy supply systems for engineers and graduates from science
departments, aiming to have activity or to be employed in projects in countries
with many isolated areas and insular systems. It is a tr...
Demand-Side Generating Assets (DSGAs) relate to existing small diesel Gensets serving the critical loads of infrastructures in unexpected electrical network interruptions. This paper investigates the exploitation of DSGA as potential suppliers of ancillary services (AS), especially in the case of isolated or weak interconnected island power systems...
Renewable energy sources (RES) have significantly helped in meeting the electricity demand of Crete, with their share in the energy balance to account for about 25% of the annual electricity production for the past five years. The contribution of photovoltaics (PVs) has been especially significant for the past three years, offering 10% in the peak...
Educational buildings have significant energy savings potential if they benefit from daylight. Secondary spaces such as corridors when controlled by combination of daylight and occupancy sensors seem to present significant savings as well. In this paper, the retrofitting of the lighting installation in a corridor in an educational building is prese...
Solar dish-Stirling technology is the Concentrated Solar Power (CSP) technology that can be more easily integrated into Distribution networks due to its small size. However, a disadvantage of this technology is that features shorter thermal inertia and thus, the output is more volatile compared to large scale CSP plants. In this paper, the producti...
Crete is the largest autonomous power system in Greece. Thera is a small island in the Aegean Sea, widely known as Santorini. This study tackles with the potential impact in case of interconnection of these two island systems. The impact on the economic operation of both power systems, the expected flow between these two power systems and the fuel...
Crete's power system faces already a significant contribution up to 25% in its energy balance by renewable energy sources. Although, there is even higher capacity of RES that could be utilized, the current power system operation and control, special restrictions, emerge limitations, which hold back their further expansion. More precisely, this stud...
This paper describes a methodology for applying geographical information systems (GIS) tools to site a photovoltaic (PV) park inside a sustainable community, in order, not only to meet all siting restrictions, such as environmental protection, but also to operate a PV park more efficiently reducing the shading effect erection and cabling cost. Addi...
Large scale integrating of wind power generation into a grid may raise serious stability issues. In this case energy storage systems seem to be suitable for balancing power and energy between the inconstant wind parks generation and the grid. In this paper, the impact of high wind power penetration on the dynamic performance and stability of power...
This paper deals with the effect of power line impedance characteristics on the retained voltage magnitude after a two-phase fault at electric power distribution or transmission networks. Specifically, the effect of resistance-to-reactance (R/X) ratio of power line conductors or cables on voltage magnitude during two-phase faults is studied with an...
Crete is the largest autonomous power system in Greece with significant RES penetration and expensive oil-fired units. There are concrete plans for interconnecting Crete with the Hellenic Transmission System via High Voltage Direct Current (HVDC) submarine cables. Interconnection plans of Crete with Cyprus and Israel also have been announced. These...
Energy networks, that is, electrical networks and fossil fuel pipelines, are the backbone of energy systems. They are a prerequisite for energy security and good quality of delivered energy services. Energy networks are exposed to weather conditions and are found to be vulnerable to the impacts of climate variability like extreme weather effects an...
This chapter provides a framework for microgrid energy management. Not only the electrical operation is presented but also issues regarding the information and communication technology (ICT) challenges. An overview of the microgrid control architectures and their main functionalities is provided. The basic distinction between centralized and decent...
The Energy Performance of Buildings Directive (EPBD) and its recast aims to promote improvements in the energy performance of buildings all across Europe. In order to achieve this target, a crucial parameter is the proper training and knowledge of the personnel that will undertake building retrofitting actions. The REE_TROFIT project focuses on thi...
1.6 billion people live in areas where the electricity grid is not available. One of the electrification options is the use of Renewable Energy Sources (RES) based off-grid systems. This chapter describes the progress in RES technologies utilized for this purpose focusing on small scale RES. A general outline of the financing mechanism is provided...
This chapter addresses Network stability issues associated with high wind power penetration in a power system. Nowadays several countries and regions all over the world, either already operate under high wind power penetration or they have concrete plans to increase it. Thus, their grids and operation strategies should cope reliable with this wind...
This paper deals with the assessment of DC components generated by renewable energy resources with inverter-based interconnection system to the electric grid. DC injection is a critical issue related to power quality of distribution network systems with high penetration of inverter-based interconnection systems. This type of interface systems may i...
This paper evaluates the current status of renewable energy sources integration and future trends, especially of the photovoltaics, in the interconnected power system of Greece and the power system of Crete Island, which is the largest isolated power system in Greece. Focusing on the ongoing developments and prospects, we investigate the impacts of...
In this paper, the impact of high wind power and photovoltaics penetration on the dynamic behavior of an island power system like one operates in Crete is investigated. Several simulations were performed leading to the fact that it is possible to achieve higher level of renewable energy sources penetration without significant dynamic security probl...
Microgrids are Low Voltage distribution networks comprising various distributed generators (DG), storage devices and controllable loads that can operate either interconnected or isolated from the main distribution grid as a controlled entity. This paper describes the operation of a Central Controller for Microgrids. The controller aims to optimize...
Middle East and North Africa (MENA) countries present abundant solar potential, which to some extent has been exploited for electricity production. However, the largest part of this potential remains still unexploited. The scope of this paper is to present the best practices in exploiting solar energy in selected MENA countries. First the general s...
The intermittent nature of most Renewable Energy Sources (RES) imposes difficulties in matching supply with demand and technical problems associated with weak grids. Energy storage may play a vital role in addressing these issues allowing for higher penetration of RES into weak electricity grids, especially in islands and isolated communities. The...
The effect of the use of a Microgrid Central Controller (MGCC) to achieve co-ordinated operation of various DG sources, storage devices and controllable loads with regards to the potential economic benefits and the power losses avoided in the local network is presented. Additionally, the effect of connecting numerous typical Microgrids in a typical...
This paper aims to present a detailed analysis on the impact that demand side bidding (DSB) has on microgrids operation, taking into account variations in market prices, RES production, and seasonal demand for a typical LV network. Additionally, the economic impact of applying adequacy constraints, i.e. request specific part of the microgrid demand...
Systems that convert the sunlight into electrical energy like photovoltaics (PV) have been becoming widespread worldwide.
The prospect of using the promising technology of wireless sensor networks (WSN) in the field of PV plant supervising and
monitoring is studied here. The knowledge of the status and good working condition of each PV module separ...
Distributed Generation (DG), has started becoming a reality in electricity networks. This analysis focuses more on a specific configuration of networks with DG, the Microgrid. Microgrids can operate in a coordinated way either interconnected to an upstream distribution network or autonomously in case of faults in the upstream medium voltage network...
Power Plant (VPP) is one of the aggregation models suggested for Distributed Generation (DG) and controllable or flexible loads. This paper aims to show the increased benefits that the end-users of DG units can enjoy if they formulate a VPP with increased flexibility of controllable loads. In this study, data from a pilot VPP formulated by three ex...
Advanced Architectures and Control Concepts for MORE MICROGRIDS (Contract No: PL019864), WORK PACKAGE D – Deliverable DD4, Final Version.
Microgrids are Low Voltage distribution networks comprising various distributed generators (DG), storage devices and controllable loads that can operate either interconnected or isolated from the main distribution grid as one controlled entity. The effect of the use of a Microgrid Central Controller (MGCC) to achieve this co-ordinate operation with...
Many efforts have been presented in the literature for wind power forecasting in power systems and few of them have been used for autonomous power systems. In addition, some recent studies have evaluated the impact on the operation of power systems and energy markets that the improvement of wind power forecasting can have. In this paper, the value...
Microgrids are low-voltage (LV) distribution networks comprising various distributed generators (DGs), storage devices, and controllable loads that can operate either interconnected or isolated from the main distribution grid as a controlled entity. This paper describes the operation of a central controller for microgrids. The controller aims to op...
Greece is a country with many dispersed islands where favorable conditions for exploiting RES exist. Cyclades is a group of islands that some of them are not so far away to be interconnected with the mainland and among them. This interconnection will reduce the need for operating the local oil- fired stations and extending the area they occupy to m...
The need for improving energy efficiency and reducing CO2 emissions and other pollutants, as well as the restructuring of energy markets has favoured the increase of distributed energy resources (DER). The co-ordinated control of these sources comprising renewable energy sources (RES) and distributed generators (DG) characterised by higher efficien...
Restructuring of power markets has helped in the penetration of Distributed
Generation (DG) in the electricity networks. Microgrids are Low Voltage
distribution networks comprising various distributed generators (DG), storage
devices and controllable loads that can operate interconnected or isolated from the
main distribution grid, as a controlled...
Restructuring of power markets has helped in the increased penetration of distributed generation (DG) in the electricity networks not only in medium voltage (MV) but also in low voltage (LV). In such networks it is difficult to estimate voltage limits violations due to the lack of load measurements at each node and the intermittent nature of renewa...
The intermittent nature of the wind creates significant uncertainty in the operation of power systems with increased wind
power penetration. Con- siderable efforts have been made for the accurate prediction of the wind power using either statistical
or physical models. In this paper, a method based on Artificial Neural Network (ANN) is proposed in...
Greece, as member of the European Union follows the European policies regarding compliance with the Kyoto Protocol, as expressed by the directive of 2001/77/CE on the promotion of renewable energy sources. The state target of Greece is 20.1% penetration in electricity production amounting to 14.5 TWh per year. Greece is a country with many disperse...
Many efforts have been presented in the bibliography for wind power forecasting in power systems and few of them have been used for autonomous power systems. The impact of knowing the distribution function of wind power forecasting error in the economic operation of a power system is studied in this paper. The papers proposes that the distribution...
Conference code: 96752, Export Date: 24 May 2016, Correspondence Address: Pilo, F.; Dipartimento di Ingegneria Elettrica ed Elettronica, Università di CagliariItaly; email: pilo@diee.unica.it, References: Sale of Power Opportunities for Distributed Generators, , http://www.dti.gov.uk/renewables/publications/index.shtml;
Restructuring of power markets has helped in the penetration of distributed generation (DG) in the electricity networks. Microgrids are low voltage distribution networks comprising various distributed generators (DG), storage devices and controllable loads that can operate interconnected or isolated from the main distribution grid, as a controlled...
Restructuring of power markets has helped in the penetration of Distributed Generation (DG) in the distribution networks. Mircogrids are Low Voltage (LV) networks that usually operate interconnected with the main Medium Voltage (MV) network but, in case of emergency, can run autonomously. In such networks Renewable Energy Sources (RES) are foreseen...
Greece, as member of the European Union follows the European policies regarding compliance with the Kyoto Protocol, as expressed by the draft directive of 2001 on "A framework for greenhouse gas emissions trading within the European Community". Accordingly, it is proposed that 38% of the CO2 emissions in EU should be included in the quota system by...
This paper provides results from the evaluation of the economic and security impacts of wind power production on autonomous, medium-size systems. The power system of Crete, the largest isolated system in Greece, is used as a study case. The analysis is based on the Economic Scheduling and on- line Dynamic Security Assessment functions developed wit...
The scope of this paper is the economical evaluation of the performance of the Greek Interconnected system with high wind power penetration. Typical operating days have been examined, with actual power demand data, for two levels of spinning reserve, at different percentages of wind penetration (0% to 15% of the maximum load demand and the total en...