Marios N. Moschakis

• Professor (Assistant) at Technological Educational Institute of Thessaly

An advanced assessment of voltage sag characteristics requires analytical mathematical expressions extracted from proper short-circuit analysis. In this document, the procedure for the extraction of those expressions is analytically described. All parameters affecting the response of a power network to a fault are taken into account. The expression...

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 adaption of Smart Grid, RES penetration, Electromagnetic Compatibility and Energy Efficiency concepts from land to ship power systems. It presents a review on the state-of-art on those areas as regards the land power systems and attempts to propose some of those advances and how they can be adapted to ship power systems. S...

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...

The analysis and design of a small autonomous power system (SAPS) that contains renewable energy sources (RES) technologies can be challenging, due to the large number of design options and the uncertainty in key parameters. Renewable power sources add further complexity because their power output may be intermittent, seasonal, and nondispatchable....

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...

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...

This paper deals with the adaptation of Microgrid and Electric Vehicle (EV) concepts to grid standards related to power quality. It presents a review of recent progress on power quality standards including standards on converters and Electric Vehicles. Power quality issues and relevant standards taking into account the operation of Electric Vehicle...

This paper deals with the adaption of Microgrid and Electric Vehicle concepts to European grid standards related to power quality. It presents a review of European norms on power quality issues including converters and EVs. Power quality issues and relevant standards dealing with the operation of EVs are discussed for interconnected and islanded (m...

The cooperation of Dispersed Generation (DG) units with storage devices to meet controllable loads constitutes a Microgrid. Microgrids are Low Voltages (LV) or in some cases Medium Voltages (MV) networks. The unique feature of Microgrids is that although they operate mostly interconnected to the upper level voltage distribution network, they can be...

In this paper, analytical expressions for the calculation of voltage sag magnitude due to faults at every point of a meshed or radial power network are derived. Balanced and unbalanced faults are considered and the effect of power transformers is taken into account. The following methods for stochastic assessment of voltage sag magnitude are compar...

In this paper, some of the operational and design characteristics of a distributed superconducting magnetic energy storage (D-SMES) device are presented. The main parts that a D-SMES consists of, the various configurations and operational techniques are discussed. The advantages and disadvantages of superconducting energy storage compared with othe...

Industrial customers often suffer from supply voltage interruptions and sags due to the increase in the utilization of sensitive equipment in the process automation and control. An effective way to improve power quality and reliability of sensitive customers is to use a static transfer switch. This device enables a very fast change in the supply of...

This work deals with the application of thyristor controlled series capacitors (TCSCs) suitably rated for radial distribution circuits. The various problems existing on long distribution lines that can be alleviated by the connection of variable series compensation, as a TCSC provides, are discussed. An important feature is the capability of the TC...

Conference code: 58005, Export Date: 24 May 2016, Correspondence Address: Kanellos, F.D.; National Technical Univ. of Athens, Dept. of Elec. and Computer Eng., 9, Heroon Polytehneiou, 15773 Zografou, Athens, Greece; email: kanellos@power.ece.ntua.gr